JPH0951287A - High frequency section structure and intermediate frequency section structure of radio transmitter-receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the assembling performance by forming a recessed part to one side of a case in the structure of a high frequency section of the radio transmitter- receiver, containing a high frequency electric circuit section therein and providing a waveguide circuit section to which an inner conductor is connected to the other side so as to reduce the number of components and to make the weight light and the size small. SOLUTION: An RF section 2 as a high frequency section and an IF section 3 as an intermediate frequency section are contained in a case 6 in the radio transmitter- receiver 1 and configured integrally. The RF section 2 is made up of an RF electric circuit section 5 and a waveguide circuit section 4. A microwave circuit section 18 is arranged in a recessed part 11B provided with a micro case 11 in the RF circuit section 5. The waveguide circuit section 4 is made up of a circulator 7 and waveguides 8-10 and provided to other side different from the side provided with the recessed part 11B. The micro circuit section 18 and the circuit section 4 are connected via an inner conductor 19. Thus, the case 6 and the waveguide circuit section 4 are formed integrally, the high frequency section is made small and components are arranged efficiently in a limited space.

Description

Detailed Description of the Invention

(Technical Field of the Invention) Technical Field of the Invention Conventional Technology (FIGS. 20 to 29) Problems to be Solved by the Invention Means for Solving the Problems Embodiments of the Invention (FIGS. 1 to 19)

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high frequency section structure and an intermediate frequency section structure of a wireless transmission / reception device which is installed outdoors, for example, and is used for transmitting and receiving wireless signals.

[0003]

2. Description of the Related Art Conventionally, as a radio transmitter / receiver for transmitting / receiving a radio signal, an antenna integrated transmitter / receiver in which an antenna and a transmitter / receiver body are integrated has been put into practical use. In such an antenna integrated transmitter / receiver, a transmitter / receiver main body having an antenna is mainly installed outdoors as an outdoor device, and main circuits such as a high frequency electric circuit unit, an intermediate frequency electric circuit unit and a power supply unit are installed in the outdoor device. Parts are stored independently for each unit.

At the time of maintenance / inspection and repair of the main body of the transmitter / receiver, the defective circuit is assembled and replaced with the unit.

[0005]

By the way, such a wireless device is required to be low in price due to its nature, easy to handle, and installable anywhere. Therefore, there is a strong demand for downsizing, weight saving, and cost reduction of wireless devices. In addition, with the downsizing and cost reduction of equipment, in the event of a failure, the location of the failure can be detected using maintenance supplies, etc.
The idea is to replace the defective unit rather than to replace the defective unit, and to significantly reduce the working time. As a result, the need to split the internal unit is diminishing.

On the other hand, in the device as described above,
Since each part such as the high frequency electric circuit part, the intermediate frequency electric circuit part, the power supply part, etc. is unitized, it causes an increase in the number of parts and the assembly man-hour, which in turn lowers the manufacturing efficiency (so-called division (Occurrence of loss). Also,
It is becoming difficult to adapt the circuit to LSI or MMIC, which hinders miniaturization.

Therefore, in order to meet the above-mentioned demand, FIG.
0, as shown in FIG. 21, it is conceivable to design the transmitter / receiver main body compactly. That is, as shown in FIG. 20, a wireless transmission / reception device 100 for performing wireless communication.
Includes a high frequency electric circuit unit (RF electric circuit unit) 110, an intermediate frequency electric circuit unit (IF electric circuit unit) 120, and a power supply unit (PS unit) 123.

Here, the RF electric circuit section 110 is a high frequency input signal (RF) suitable for transmitting the intermediate frequency signal (IF signal) from the IF electric circuit section 120 by spatial propagation.
Signal) and an RF signal transmitted from another wireless transmission / reception device into an IF signal. The local oscillator (LO) 115 and the up converter (U /
C) 116, a high power amplifier (HPA) 118,
Circulator (CIR) 111, low noise amplifier (LNA) 113, and down converter (D / C) 11
4 and waveguide filters 112B, 117B, and 119B.

The IF electric circuit section 120 is for adjusting the gain of the input signal, and comprises an automatic gain control section (AGC) 121 on the transmission side and an AGC 122 on the reception side. The IF electric circuit section 120, the power supply section (PS section) 123, and a required control section (including the bias electric circuit section of the RF electric circuit section 110) are arranged on a common printed circuit board (PCB) 130. There is.

FIG. 21 is an exploded perspective view schematically showing the overall structure of the antenna integrated transmitter / receiver 100. As shown in FIG. 21, the antenna integrated transmitter / receiver 100 has a high frequency section (RF). Section 160 and intermediate frequency section (IF section) 170 are housed in a case (case) 151, and the case 151 is closed by a lid member 156.

The RF section 160 is composed of an RF electric circuit section 110 and a waveguide circuit section 161. In the RF electric circuit section 110, the microwave circuit section (μ
The circuit part) 162 is housed in the microwave housing (μ housing) 154, and the μ housing 154 is closed by the lid member 155. The waveguide circuit unit 161 includes a circulator (CIR) 111 and waveguides 112, 117, 119.
And an antenna connection waveguide 153.

On the other hand, in the IF section 170, the IF electric circuit section 120 and the PS section 123 are integrated and arranged on one PCB 130 as described above, and this PCB 130 is made of, for example, metal. It is covered with a shield cover 157. Further, the case 151 is formed in a substantially square shape in a plan view, an antenna mounting surface 152A is formed on one end surface thereof, and an opening portion 152B is formed on the other end surface of the case 151.

The case 151 and the lid member 156 are
For example, it is made of a material having good conductivity and heat resistance such as aluminum. Now, the operation of the wireless transmission / reception device 100 will be described with reference to FIG. 20. At the time of transmission, first, the signal is modulated by the modulation unit (MOD) 141 of the indoor device 140 provided separately from the wireless transmission / reception device 100. It

This signal is transmitted to the radio transmitter / receiver 10
0 is input to the IF electric circuit unit 120, and the gain is adjusted by the AGC 121.
/ C116 converts the frequency of the IF signal into the quasi-millimeter-millimeter wave band. Further, this signal is transmitted to the waveguide filter 11
After noise is cut by 7B, it is amplified by HPA 118, further noise is cut by waveguide filter 119B, and is transmitted from antenna 101 via CIR 111.

The signal received by the antenna 101 is input to the waveguide 112 via the CIR 111 of the RF electric circuit section 110, noise is cut by the waveguide filter 112B, and then amplified by the LNA 113. .
Further, the signal in the quasi-millimeter / millimeter wave band is converted into an IF signal by the D / C 114 and then input to the IF electric circuit section 120.

Further, the signal input to the IF electric circuit section 120 is gain-adjusted by the AGC 122 and input to the demodulation section (DEM) 142 of the indoor unit 140, and this DE
The signal is demodulated by M142. Where R
FIG. 22 shows the internal configuration of the F portion 160 when viewed from the direction of the case opening portion 152B. As shown in FIG. 22, since the RF unit 160 of the above-described wireless transmitter / receiver 100 is configured by combining the waveguide circuit unit 161 and the RF electric circuit unit 110, each of the waveguides 112, 117, 119. Corners and fixing flanges 112A, 117A, 119
Due to the restriction of the dimension A, there is a problem that a dead space in which other components and units cannot be mounted is created as shown by the hatched portion X in FIG.

Also, FIG. 23 is a view taken along the line LL in FIG. 22, and as shown in FIG.
The connection section 190 between the RF electric circuit section 110 and the RF electric circuit section 110 is provided in order to improve the characteristics of the RF electric circuit section 110.
It is formed in the same shape as the caliber. Here, this connecting portion 190 is formed by making a hole in the μ housing 154, and it is desirable to make each corner portion 193 small in view of the characteristics of radio waves. However, the smaller the corners 193, the worse the workability,
There is also the problem of increasing costs.

Further, FIG. 24 is a sectional view taken along the line MM in FIG. 22. As shown in FIG.
The small hole 196 is provided in the hole 194 to which the waveguide 119 of FIG.
A support 19 is formed in this small hole 196.
The inner conductor 195 covered with 5A is inserted. The inner conductor 195 is the U of the RF electric circuit unit 110.
The signal converted by / C116 is sent to the waveguide 119, and the signal from the waveguide 112 is also supplied to the D / C114 at the connection portion of the μ housing 154 with the waveguide 112.
An inner conductor 195 is provided for transmission to the.

However, in such a structure, there is a problem that the workability is not good because the processing direction of the connection hole 194 of the waveguide 119 and the processing small hole 196 of the inner conductor 195 are different. Further, the L dimension shown in FIG. 24 has a great influence on the characteristics of the RF electric circuit section 110, and the higher the dimension accuracy, the better the characteristics of the RF electric circuit section 110.

However, in such a configuration, the hole 1
There is a problem in that it is difficult to process with high dimensional accuracy because it must be processed by digging 94. By the way, as shown in FIGS.
A post filter is used as 12B. As shown in FIG. 25, this post-type filter 112B is
A post (or pin) 197 is inserted into a hole 112C provided in the waveguide body 112, and the post 197 is fixed by soldering or the like.

The waveguides 117 and 119 also have
Like the waveguide 112, the post filters 117B, 1B
19B is used and has a structure as shown in FIG. However, this waveguide filter 112B
Depending on the band of the conversion frequency, the diameter d of the post 197 needs to be extremely smaller than the outer diameter T1 of the waveguide body 112 and the plate thickness t1 of the waveguide body 112. There is also a problem that workability of the portion 112C and workability of fixing the post 197 are deteriorated.

26 and 27 show the appearance of the IF section 170. Here, the IF unit 170 uses the PC as described above.
The IF electric circuit section 120 and the PS section 123 are mounted on the B130 and are covered with the shield cover 157. The shield cover 157 is screwed to the shield cover fixing section 201 provided on the PCB 130 and the shield cover 157. Since the PCB 130 is fixed in place, the shield cover 157 is difficult to attach and detach when the PCB 130 is inspected, repaired, or modified.

Further, FIGS. 28 and 29 show two different conventional examples, both of which are Q-Q in FIG.
The cross section is shown. As shown in FIGS. 28 and 29, in this PCB 130, not only the shield cover fixing portion 201 described above but also the IF portion 170 is provided in the case 1.
Since the case fixing part 200 for fixing to 51 is also required, there is a problem that the mounting space on the PCB 130 is reduced.

The present invention was devised in view of the above problems, and by using a circuit having a simple structure, the number of parts constituting the radio transmitter / receiver can be reduced and the radio transmitter / receiver can be miniaturized. An object of the present invention is to provide a high-frequency section structure and an intermediate-frequency section structure of a wireless transmission / reception device, which secures a large mounting space on a PCB to improve workability such as maintenance and inspection, repair, and modification.

[0025]

Therefore, the structure of the high-frequency section of the radio transmitter / receiver of the present invention is the same as the high-frequency section structure of the radio transmitter / receiver, and the housing has a recess formed in a required one surface and the recess. A waveguide provided on the other surface portion of the housing that is different from the high-frequency electric circuit portion and the concave portion that houses the high-frequency electric circuit portion, and is connected to the high-frequency electric circuit portion through an inner conductor. It is characterized by comprising a circuit part (claim 1).

Further, in the high-frequency section structure of the radio transmitter / receiver of the present invention, a recess is formed on the other surface of the housing, and a lid member is provided to cover the recess. It is characterized in that the waveguide circuit portion is constituted by the concave portion formed in the surface portion (claim 2). further,
The high-frequency section structure of the wireless transmitter-receiver of the present invention is characterized in that the waveguide circuit section made of a plate member is provided on the other surface section of the housing (claim 3).

Further, the high frequency section structure of the radio transmitter / receiver of the present invention is characterized in that a dielectric filter is provided by disposing a dielectric in the waveguide circuit section (claim 4). . Furthermore, the high-frequency section structure of the wireless transmission / reception device of the present invention has a hole formed in both or one of the housing and the lid member, and a pin is attached to the hole to provide the waveguide circuit section with A post filter is provided by arranging the pins (claim 5).

Further, in the high frequency section structure of the radio transmitter / receiver of the present invention, a hole is formed in the plate member, a pin is mounted in the hole, and the pin is arranged in the waveguide circuit section. As a result, a post filter is provided (claim 6). Further, the high-frequency section structure of the wireless transmitting / receiving apparatus of the present invention is characterized in that the waveguide circuit section is provided with a circulator.

The intermediate frequency section structure of the wireless transmitting / receiving apparatus of the present invention is the same as the intermediate frequency section structure of the wireless transmitting / receiving apparatus,
A printed circuit board on which an electric circuit for the intermediate frequency section is mounted; and a shield cover for covering the printed circuit board, and an end surface of the shield cover is bent in a U-shape to form a fixed surface of the printed circuit board. A leaf spring is formed integrally with the holding portion, and a plate spring that locks the printed circuit board is provided at a portion of the shield cover facing the holding portion, and the holding portion of the shield cover and the leaf spring are It is characterized in that a protrusion for preventing displacement of the printed circuit board is formed on a side portion different from the arrangement portion (claim 8).

[0030]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view schematically showing an overall configuration of a wireless transmission / reception device 1 according to an embodiment of the present invention. As shown in FIG. 1, in the wireless transmission / reception device 1 of the present invention, as a high frequency unit, The RF unit 2 and the IF unit 3 as an intermediate frequency unit are housed in a housing (case) 6 and are integrally formed. Then, the case 6 is closed by the lid member 17.

The RF section 2 is composed of a high frequency electric circuit section (RF electric circuit section) 5 and a waveguide circuit section 4. Further, the μ circuit portion 18 of the RF electric circuit portion 5 is
The housing 11 is housed in the housing 11, and the housing 11 is closed by a lid member 12 from the IF section 3 side. Further, the waveguide circuit section 4 is mainly composed of a circulator (CIR) 7 and waveguides 8 to 10, and the recess formed in the μ housing 11 functions as a waveguide. ing. This will be described later in detail.

The IF section 3 includes an intermediate frequency electric circuit section (IF
The electric circuit part 16, the power source part (PS part) 15 and a required control part (not shown, but including the biasing electric circuit part of the RF part 2) are integrated into one printed circuit board (PCB). ) 14 is placed on this PCB14
Is shielded by a metal shield cover 13, for example.

The case 6 is formed in a substantially square shape in a plan view, and an antenna mounting surface 6A is formed on one end surface thereof. By mounting an antenna on the antenna mounting surface 6A, the present device functions as an antenna-integrated transmission / reception device. Case 6
Has an opening 6B formed on the other end surface thereof. The RF portion 2 and the IF portion 3 described above are accommodated in the case 6 so as to overlap with each other, and finally the lid member 17 is fixed to the case 6. It is supposed to be done.

The case 6 and the lid member 17 are made of a material having good conductivity and good heat resistance, such as aluminum. Further, as indicated by the chain line in FIG.
Instead of arranging the S section 15 on the PCB 14, the S section 15 may be housed in the upper space of the RF section 2 as the power supply unit 2A.

Next, FIG. 2 and FIG. 3 show the internal structure of the RF unit 2 when viewed from the direction of the case opening 6B. The μ circuit portion 18 of the RF electric circuit portion 5 is arranged so as to be housed in the concave portion 11B formed in the μ housing 11, and is connected to the waveguide circuit portion 4 via the inner conductor 19. It is connected. Here, the inner conductor 19 is inserted and fixed through a support 21 made of resin or the like from both ends of the waveguide filters 8 to 10 into a small hole 19A provided inside by the same dimension as the L dimension shown in FIG. Has been done.

As the waveguide circuit section 4, in addition to the above-mentioned waveguides 8 to 10 and the CIR 7, the waveguide cover member 4 is used.
A and 22 are provided, and as shown in FIGS.
The waveguides 8 to 10 are formed by being attached to the μ housing 11. In the μ circuit section 18, components such as a circulator (CIR) 23A and a monolithic microwave IC (MMIC) 23B are arranged on a printed circuit board (PCB) 24. Reference numeral 20 is a yoke of the CIR unit 7.

4 is a sectional view taken along the line AA in FIG. 3, FIG. 5 is a sectional view taken along the line BB in FIG. 3, and FIG. 6 is a sectional view taken along the line CC in FIG. As shown in FIG.
In the RF unit 2, the concave portion 1 is formed in the surface of the μ housing 11 on the case 6 side.
1A is formed, and by covering the recess 11A with the waveguide cover members 4A and 22, the recess 11A is covered by the waveguides 8 to 8.
It is designed to function as 10.

The CIR 7 shown in FIGS. 3 and 4 is composed of a ferrite 25 and magnets 26A and 26B. As shown in FIG. 6, both ends of the ferrite 25 are sandwiched between two magnets 26A and 26B. The ferrite 25 and the magnets 26A and 26B are connected to the yoke 20.
It is configured by fixing with. Then, the waveguide circuit 4 is provided with the concave portion 11A provided in the μ housing 11 as described above.
With CIR7 and μ
By providing the concave portion 11B for housing the μ circuit 18 in the housing 11, the waveguide circuit 4 and the RF electric circuit portion 5 can be integrated to form the RF portion 2, and the dead space of the RF portion 2 can be reduced. Without it, the wireless transmission / reception device 1 can be downsized. At this time, the connection waveguide is not necessary and the number of parts of the device is reduced.

Further, in FIGS. 7 and 9, the RF unit 2 has a case 6
8 is a schematic configuration view of the lid member 17 viewed from the opening 6B side, FIG. 8 is a D-D sectional view in FIG. 7, and FIG. 10 is an E-E sectional view in FIG. 9. The waveguide circuit section 4 is
As described above, it is composed of the CIR 7 and the waveguides 8 to 10. In the present embodiment, the case where the dielectric filter 27 is used as the waveguide filter of the waveguides 8 and 9 is shown in FIG. 7 and 8 show the case where the dielectric filter 27 is used as the waveguide filter of the waveguide 10. Also,
Post-type filter 2 as a waveguide filter of the waveguide 10
The case of using No. 8 is shown in FIGS. Although not shown, it is of course possible to use the post filter 28 as the waveguide filter of the waveguides 8 and 9.

Here, as shown in FIG. 4, the dielectric filter 27 as the waveguides 8 and 9 has a dielectric 27A arranged on a support base 27B made of, for example, ceramic or quartz. Such a dielectric filter 27 is used for the waveguides 8 and 9
Are located in Further, the dielectric filter 27 of the waveguide 10 shown in FIG. 8 is configured similarly to the dielectric filter 27 shown in FIG. 4, and the dielectric 27A is arranged on the ceramic or quartz support base 27B. It was set up.

A predetermined number of such dielectric filters 27 are arranged inside each of the waveguides 8 to 10, and change the frequency characteristic of the radio wave passing through each of the waveguides 8 to 10. ing. Then, the lid member 4A is attached from above the paper surface of FIG. 4 and the concave portions 11A are covered to form the waveguides 8 and 9. Similarly, the lid member 22 is attached from above the paper surface of FIG. 7 to cover the concave portion 11B, whereby the waveguide 10 shown in FIG. 8 is configured.

Further, as the filter of the waveguides 8 to 10, the post type filter 28 shown in FIGS. 9 and 10 can be considered. The post type filter 28 has holes 30A or 30B formed in both or one of the μ housing 11 and the lid member 22, and the posts 28 as pins are formed in the holes 30A or 30B.
It is configured by inserting A. By configuring the post-type filter 28 in this way, it is possible to physically change the property of the wave passing through each of the waveguides 8 to 10 and obtain a desired characteristic.

Now, the post 28 of the post type filter 28
A and the holes 30A and 30B for fixing the post 28A will be described. The holes 30A and 3B for fixing the post 28A.
As shown in FIG. 11, a counterbore portion 36 having a large diameter d1 is provided on the surface of 0B. The counterbore portion 36 is formed to be obviously larger than the diameter d of the post 28A,
Thereby, the outer diameter T2 of the waveguides 8 to 10 and the waveguides 8 to
Compared with the plate thickness t2 of 10, the holes 30A, 3 of the post 28A are
Even if it is necessary to make the diameter d of 0B extremely small, there is an advantage that the workability and processing accuracy of the hole portions 30A and 30B are improved. Also, when fixing the post 28A,
By pouring the solder between the counterbore portion 36 and the post 28A, the post 28A can be securely fixed, and there is an advantage that the work can be easily performed.

On the other hand, as shown in FIG. 12, the post 28A
The fixing hole portions 30A and 30B may be formed in a countersink shape having a large diameter d2. That is, a conical countersink hole 37 is formed on the surface side of the holes 30A and 30B, and solder is flown between the countersink hole 37 and the post 28A, so that the soldering work can be performed easily and reliably. Like Also,
There is also an advantage that the boring of the holes 30A and 30B can be facilitated and the machining accuracy is improved.

By the way, FIG. 13 shows an intermediate frequency electric circuit section (IF section) 3 of the radio transmitting / receiving apparatus 1 as one embodiment of the present invention shown in FIG.
As described above, the intermediate frequency section electric circuit section (IF electric circuit section) 16, the power supply section (PS section) 15 and the required control section (not shown, including the bias electric circuit section of the RF section 2) are provided. , Integrated into one printed circuit board (PC
B) The PCB 14 is arranged on the board 14 and is shielded by a metal shield cover 13, for example.

FIG. 14 is a view taken in the direction of arrow F in FIG.
15 is a view taken in the direction of arrow G in FIG. 13, FIG. 16 is a cross-sectional view taken along line HH in FIG. 13, FIG. 17 is a cross-sectional view taken along line JJ in FIG. 13, and FIG. 18 is a view taken in the direction of arrow K in FIG. The shield cover 13 has fixing surfaces 3 for fixing the PCB 14 to the case 6 at both ends of its end portion (left end in FIG. 13) 32.
2B is formed and the end portion 3 other than the fixing surface 32B is formed.
A pressing portion (hereinafter referred to as a claw portion) 32A that is bent in a U shape is formed on the member 2. This claw portion 32A is a PC
As shown in FIG. 15, the claw portion 32A is bent at a position higher than the fixing surface 32B by the plate thickness of the PCB 14 so as to lock the corresponding edge portion of B14.

Fixing surfaces 33B for fixing the PCB 14 to the case 6 are formed at both ends of the end portion 33 of the shield cover 13 which faces the end portion 32. A support portion 33A for supporting the edge portion of the PCB 14 is bent and formed in a U shape at the end portion 33 other than the fixed surface 33B. The support portion 33A and the fixed surface 33B are configured to have substantially the same height. With such a configuration, the fixing surfaces 32B and 33B for the PCB 14, the claw portion 32A, and the support portion 33A are integrally formed on the shield cover 13.

Further, as shown in FIGS. 13 and 14, the end portion 33 of the shield cover 13 is also provided with a leaf spring 31 for locking the PCB 14. This leaf spring 31
Has a substantially S-shaped cross section and is configured to have appropriate elasticity, and is ejected by the PCB 14 to lock the PCB 14. further,
In order to prevent the displacement of the PCB 14, the end portions 34 of the shield cover 13 which are different from the end portions 32 and 33 and which connect the upper and lower end portions 35 and the end portion 32 shown in FIG. 34A is formed.

As shown in FIG. 16, the protrusion 34A is formed such that the upper end thereof is substantially flush with the PCB 14, and the protrusion 34A regulates the movement of the PCB 14 to prevent the displacement of the PCB 14. It can be prevented. As shown in FIG. 17, the upper and lower ends 35 of the shield cover 13 are also bent in a U shape, and a supporting portion 35A similar to the supporting portion 33A is formed.

As a result, the shield cover 13 is attached to the PCB.
When mounting on the shield 14, as shown in FIG. 15, first, between the fixing surface 32B of the shield cover 13 and the claw portion 32A, P
Insert CB14. Next, the PCB 14 is rotated toward the shield cover 13 so that the edge portion of the PCB 14 (see FIG.
The leaf spring 31 is ejected in the direction of the arrow b by the right end side edge portion in the inside. After that, the leaf spring 31 returns in the direction of the arrow a, so that the edge portion of the PCB 14 is locked to the leaf spring 31.
The PCB 14 and the shield cover 13 are fixed.

At this time, the edge portion of the PCB 14 is supported by the fixing surfaces 32B, 33B and the supporting portions 33A, 35A, respectively, and is also locked by the claw portion 32A, and the protrusion portion 34A formed on the end surface 34 causes the PCB 14 to move. The vertical displacement of the PCB is prevented, and the PCB 14 and the shield cover 13 are securely fixed. Further, as shown in FIG. 18, the fixing surface 32 for the PBC 14 of the shield cover 13
B, 33B, holes 32C, 33 through which the screw 40A penetrates
C is provided, and the case 6 is also provided with a screw hole 40B at a portion corresponding to the holes 32C and 33C provided on the fixing surfaces 32B and 33B. As shown in FIG. 18, screws 40A are passed through these fixing surfaces 32B and 33B and fastened together.

Since the high frequency section structure and the intermediate frequency section structure of the radio transmitter / receiver according to the embodiment of the present invention are configured as described above, the dielectric filter 27 or the post filter of the waveguide circuit section 4 is used. 28 and the RF electric circuit unit 5 can be integrated in the μ housing, the dead space of the RF unit 2 can be eliminated, and the wireless transmission / reception device 1 can be downsized.

Further, the μ housing 11 having the concave portion 11A which is a groove for forming the waveguide circuit portion 4 and the lid member 12 are provided with holes for mounting the ferrite 25 and the magnet 26, and the connection of the waveguide. By forming the CIR7 by providing the opening for use with the CIR7, the waveguides 8 to 10, the CIR7, the connecting waveguide and the RF electric circuit unit 5 can be integrated. It becomes unnecessary, the dead space of the RF section is eliminated, and the wireless transmission / reception device 1 can be downsized.

Further, since the waveguides 8 to 10 and the RF electric circuit unit 5 are integrally formed, a connection hole for connecting the waveguides 8 to 10 and the RF electric circuit unit 5 is provided with a μ housing. It is not necessary to provide it at 11. As a result, each corner of the connection hole can be eliminated. Further, the dimensional accuracy of the L dimension of the connection hole is also improved, so that the RF electric circuit unit 5
While improving the characteristics of, the waveguides 8-10 and RF can be easily
The electric circuit section 5 can be connected.

Further, the countersunk portion 36 is provided in the hole portions 30A and 30B for fixing the post 28A in the post type filter 28.
Or a hole 30 for fixing the post 28A
Even if it is necessary to make the post diameter d extremely smaller than the outer diameter T2 of the waveguide and the plate thickness t2 of the waveguide by forming the countersunk holes A and 30B, the μ housing 11, the lid Member 2
Since the substantial machining allowance of the small-diameter d holes 30A and 30B formed in 2 can be made shallow, these holes 30
Processing of A and 30B can be easily performed. Therefore, the processing accuracy of the holes 30A and 30B is also improved, and when the post 28A is fixed, no special tool or skill is required,
The post 28A can be easily fixed by soldering or the like. Thereby, workability in processing the hole 30A or 30B of the post 28A and fixing the post 28A can be significantly improved.

Further, since the IF section 3 is constructed so that the shield cover 13 and the PBC 14 are fixed by the leaf spring 31, the shield cover 1 at the time of inspection, repair, and modification.
There is an advantage that the 3 can be easily attached and detached. further,
By integrally attaching the shield cover 13 and the PBC 14 to the case 6 as described above, workability during assembly and repair is significantly improved. Further, when the PCB 14 is mounted on the case 6, a portion corresponding to the fixing surfaces 32B and 33B of the case 6 is provided with an earth pattern, so that there is an advantage that the earth connection can be surely performed.

Further, the IF section 3 fixes the shield cover 13 and the PBC 14 with the leaf spring 31, and the shield cover 1
3, the fixing surfaces 32B and 33B, the claw portion 32A, and the support portion 33.
Since the A and 35A are integrated, the shield cover 13 and the PBC 14 which are necessary in the conventional shield cover are provided.
The fixed parts for and become unnecessary, and the number of parts can be reduced. And thereby, cost, weight, and an assembly man-hour can be reduced. Further, with such a configuration, there is an advantage that the wireless transmitting / receiving apparatus 1 can be downsized while increasing the mounting space of the PCB 14.

Next, FIG. 19 shows a modified example of this embodiment.
This will be described with reference to FIG. Note that FIG. 19 is a sectional view corresponding to FIG. In this modification, only the configuration of the waveguide 10 is different, and the other configurations are the same as those of the above-described embodiment. As shown in FIG. 19, in the modification of the present embodiment, the μ circuit unit 18 of the RF electric circuit unit 5 is the μ housing 1
The waveguide circuit portion 4 is housed in a recess 11B formed on one surface of the waveguide member 1. The waveguide circuit portion 4 includes a waveguide member 22 formed by processing a plate member and having both ends opened. The lid member 29 made of a plate member for closing is arranged on the other surface of the μ housing 11.

That is, the other of the μ housing 11 (in FIG. 19,
The waveguide member 22 is attached to the surface of the μ housing 11), and then the opening of the waveguide member 22 is closed by brazing with the lid member 29, so that the waveguide 10 is configured. It has become. The waveguide circuit section 4 is composed of a CIR 7 and waveguides 8 to 10. In this modification, a post-type filter 28 is used as a waveguide filter of the waveguide 10.
However, it is also possible to use the dielectric filter 27.

In the post type filter 28, as described above, the hole 30A or 30B is formed in both or one of the μ housing 11 and the lid member 22, and the post 28A as a pin is inserted into the hole 30A or 30B. It is composed of Further, the μ housing 11 is provided with a small hole 19A for inserting and fixing the inner conductor 19 through the support 21, but since the μ housing 11 has a shape as shown in FIG. The holes 19A can be easily processed, and the accuracy of the L dimension, which greatly affects the characteristics of the RF electric circuit section 5, can be improved.

With such a configuration, in the modification of this embodiment, the same effect as that of this embodiment described above can be obtained, and the waveguide member 22 and the lid are provided on the other surface of the μ housing 11. By providing the member 29, there is an advantage that the μ housing 11 can be made relatively lightweight and the housing can be easily processed.

[0062]

As described above in detail, according to the high frequency section structure of the radio transmitter / receiver of the present invention as set forth in claim 1, a recess is formed in a required one surface portion in the high frequency section structure of the radio transmitter / receiver apparatus. The housing, the high-frequency electric circuit portion housed in the recess, and the recess of the housing that accommodates the high-frequency electric circuit portion are provided on the other surface different from each other, and the inner conductor is provided to the high-frequency electric circuit portion. By being configured by including the waveguide circuit section connected to each other, the housing and the waveguide circuit section can be integrally formed, and the high frequency section can be downsized. As a result, the dead space that occurs when the housing and the waveguide circuit section are provided separately can be eliminated, and the components can be efficiently arranged in the limited space within the wireless transmission / reception device. Like

Furthermore, since the waveguide and the high-frequency electric circuit section are connected by the inner conductor, it is not necessary to make a hole in the housing as a connection hole, which makes it necessary to reduce each corner of the connection hole. Also, since it is not necessary to provide the L dimension in the connection hole, it is possible to easily connect the waveguide and the high frequency electric circuit while improving the characteristics of the high frequency electric circuit.

According to the structure of the high frequency section of the radio transmitter / receiver of the present invention as set forth in claim 2, in addition to the structure of claim 1, a recess is formed on the other surface of the casing, and the recess is formed. The waveguide circuit portion is simply configured by providing the cover member and forming the waveguide circuit portion by the lid member and the recess formed on the other surface portion of the housing. Therefore, the number of components of the waveguide circuit section can be reduced. This also has the advantage that the cost, weight, work man-hours, etc. can be reduced.

According to the structure of the high frequency section of the radio transmitter / receiver of the present invention as set forth in claim 3, in addition to the structure as set forth in claim 1, the waveguide formed of a plate member on the other surface of the housing. The configuration in which the circuit portion is provided has an advantage that the casing can be made relatively lightweight and the casing can be easily processed. According to the structure of the high frequency section of the radio transmitter / receiver of the present invention according to claim 4,
In addition to the configuration according to claim 1, the waveguide circuit portion,
With the configuration in which the dielectric filter is provided by arranging the dielectric, the dielectric filter and the high-frequency electric circuit unit can be integrated in the housing, the dead space of the high-frequency unit is eliminated, and the wireless transmission / reception device is provided. There is an advantage that it can be miniaturized.

According to the structure of the high frequency section of the radio transmitter / receiver of the present invention as set forth in claim 5, in addition to the structure of claim 1, a hole is provided in both or one of the housing and the lid member. The post-type filter and the high-frequency electric circuit unit are formed in the housing by the structure in which the post-type filter is formed by mounting the pin in the hole and disposing the pin in the waveguide circuit unit. It is possible to reduce the size of the radio transmitter / receiver by eliminating the dead space in the high frequency section.

According to the structure of the high frequency section of the radio transmitter / receiver of the present invention according to claim 6, in addition to the structure according to claim 3, a hole is formed in the plate member and a pin is formed in the hole. With the configuration in which the post type filter is provided by mounting the pin and disposing the pin in the waveguide circuit section, the case can be made relatively lightweight and the case can be simplified. It can be processed. In addition, it becomes easy to machine the hole where the pin of the post type filter is attached,
The dimensional accuracy of this hole can be improved. Further, there is an advantage that the post filter and the high frequency electric circuit section can be integrated in the housing, the dead space of the high frequency section can be eliminated, and the wireless transmission / reception device can be downsized.

Further, according to the structure of the high frequency section of the radio transmitter / receiver of the present invention described in claim 7, in addition to the structure described in claim 1, a circulator is provided in the waveguide circuit section. , The waveguide filter, the circulator, the connection waveguide, and the high-frequency electric circuit unit can be integrated, which eliminates the need for the connection waveguide and eliminates the dead space of the high-frequency unit, thereby providing a wireless transceiver. There is an advantage that it can be miniaturized.

According to the intermediate frequency section structure of the wireless transmission / reception device of the present invention as defined in claim 8, in the intermediate frequency section structure of the wireless transmission / reception apparatus, a printed circuit board on which an electric circuit for the intermediate frequency section is mounted, and the printed circuit board. A shield cover for covering the circuit board is provided, and an end surface of the shield cover is bent in a U shape to integrally form a fixed surface of the printed circuit board and a pressing portion, and the shield cover facing the pressing portion is formed. A leaf spring that locks the printed circuit board is provided in the portion, and the printed circuit board is prevented from being displaced on a side portion of the shield cover different from the pressing portion and the leaf spring disposition portion. Due to the configuration in which the projection portion for forming is formed, the shield cover and the printed circuit board can be easily attached and detached, and the shield cover and the printed circuit board can be integrated. It is possible to mount the housing Te. As a result, there is an advantage that workability at the time of assembling, repairing, inspecting, and modifying the wireless transmitting / receiving device can be significantly improved.

Further, the fixed parts for the shield cover and the printed circuit board, which are required in the conventional shield cover, are not required, and the number of parts can be reduced. And thereby, cost, weight, and an assembly man-hour can be reduced. Further, with such a configuration, there is an advantage that the wireless transmission / reception device can be downsized while increasing the mounting space of the printed circuit board.

Further, when the printed circuit board is mounted on the housing, the portion corresponding to the fixed surface of the housing is provided with the ground pattern, so that there is an advantage that the ground connection can be surely made.

[Brief description of drawings]

FIG. 1 is an exploded perspective view schematically showing an overall configuration of a wireless transmission / reception device as an embodiment of the present invention.

FIG. 2 is a schematic diagram showing an internal configuration of a high frequency electric circuit section of a wireless transmission / reception device according to an embodiment of the present invention.

FIG. 3 is a schematic diagram showing an internal configuration of a high-frequency electric circuit unit of the wireless transmission / reception device as one embodiment of the present invention.

4 is a cross-sectional view taken along the line AA in FIG.

FIG. 5 is a sectional view taken along line BB in FIG. 3;

FIG. 6 is a sectional view taken along the line CC in FIG. 3;

FIG. 7 is a schematic diagram showing an internal configuration of a high frequency electric circuit section of a wireless transmission / reception device according to an embodiment of the present invention.

8 is a sectional view taken along the line DD in FIG. 7;

FIG. 9 is a schematic diagram showing an internal configuration of a high frequency electric circuit section of a wireless transmission / reception device according to an embodiment of the present invention.

10 is a sectional view taken along line EE in FIG.

FIG. 11 is a schematic view showing a hole for fixing a post filter.

FIG. 12 is a schematic view showing a hole for fixing a post filter.

FIG. 13 is a schematic diagram showing an external appearance of an intermediate frequency electric circuit unit of the wireless transmission / reception device as one embodiment of the present invention.

FIG. 14 is a view on arrow F in FIG.

15 is a view on arrow G in FIG.

16 is a cross-sectional view taken along line HH in FIG.

17 is a cross-sectional view taken along line JJ in FIG.

18 is a view on arrow K in FIG.

FIG. 19 is a schematic diagram showing an internal configuration of a high frequency electric circuit section of a wireless transmission / reception device as a modified example of the embodiment of the present invention.

FIG. 20 is an electric circuit diagram showing a configuration of a main electric circuit unit in the wireless transmission / reception device.

FIG. 21 is an exploded perspective view schematically showing the overall configuration of the wireless transmission / reception device.

FIG. 22 is a schematic diagram showing an internal configuration of a high frequency electric circuit unit of the wireless transmission / reception device.

23 is a view taken along the line LL in FIG.

24 is a sectional view taken along line MM in FIG. 22.

FIG. 25 is a schematic view showing a hole for fixing a post filter.

FIG. 26 is a schematic diagram showing an appearance of an intermediate frequency electric circuit unit of the wireless transmission / reception device.

FIG. 27 is a schematic diagram showing an appearance of an intermediate frequency electric circuit unit of the wireless transmission / reception device.

28 is a sectional view taken along line QQ in FIG. 27.

29 is a sectional view taken along line QQ in FIG. 27.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Radio transmitter / receiver 2 High frequency part (RF part) 2A power supply unit 3 Intermediate frequency part (IF part) 4 Waveguide circuit part 4A Waveguide cover member 5 High frequency electric circuit part (RF electric circuit part) 6 Case (case ) 6A Antenna mounting surface 6B Opening 7 Circulator (CIR) 8 to 10 Waveguide 11 Microwave housing (μ housing) 11A, 11B, Recessed portion 11C Groove 12 Cover member 13 Shield cover 14 Printed circuit board (PBC) 15 Power supply part (PS part) 16 Intermediate frequency electric circuit part (IF electric circuit part) 17 Lid member 18 Microwave circuit part (μ circuit part) 19 Inner conductor 19A Small hole 20 Yoke 21 Support 22 Waveguide member 23A Circulator (CIR) ) 23B Monolithic Microwave IC (MMI
C) 24 printed circuit board (PCB) 25 ferrite 26A, 26B magnet 27 dielectric filter 27A dielectric 27B support 28 post type filter 28A post (or pin) 29 cover member 30A, 30B hole 31 leaf spring 32 to 35 end Part 32A Pressing part (claw part) 33A, 35A Support part 32B, 33B Fixing surface 32C, 33C Hole part 34A Protrusion part 36 Counterbore part 37 Countersunk hole 40A Screw 40B Screw hole 100 Radio transmitter / receiver 101 Antenna 110 High frequency electric circuit part (RF 111) Circulator 112, 117, 119 Waveguide 112A, 117A, 119A Waveguide flange 112B, 117B, 119B Waveguide filter 112C, 117C, 119C Hole 113 Low noise amplifier (LNA) 114 Downcon (D / C) 115 Local oscillator (LO) 116 Up converter (U / C) 118 High power amplifier (HPA) 120 Intermediate frequency electric circuit section (IF section) 121, 122 Automatic gain control section (AGC) 123 Power supply Part (PS part) 130 Printed circuit board (PCB) 140 Indoor device 141 Modulation part (MOD) 142 Demodulation part (DEM) 151 Housing (case) 152A Antenna mounting surface 152B Opening 153 Antenna connection waveguide 154 μ Housing 155 Lid member 156 Lid member 157 Shield cover 160 High frequency part (RF part) 161 Waveguide circuit part 162 μ Circuit part 170 Intermediate frequency part (IF part) 190 Connection part 193 Corner part 194 Hole 195 Inner conductor 195A support 196 Small hole 197 Post (or pin) 200 Case fixing part 2 1 shield cover fixed part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuichi Hagiwara 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited (72) Inventor Toshimitsu Kobayashi 1015 Kamedotachu, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited ( 72) Inventor Masahiko Kaneko 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited

Claims (8)

[Claims] 1. A high-frequency section structure of a wireless transmitter-receiver, comprising: a housing having a recess formed in a required one surface, a high-frequency electric circuit section housed in the recess, and the high-frequency electric circuit section in the housing. A radio transmission / reception device, characterized in that it is provided on the other surface portion different from the concave portion to be accommodated and is provided with a waveguide circuit portion connected to the high-frequency electric circuit portion through an inner conductor. High frequency structure. 2. A waveguide is formed by forming a recess on the other surface of the housing and providing a lid member that covers the recess, and the waveguide is formed by the lid member and the recess formed on the other surface of the housing. The high frequency section structure of the wireless transmitter / receiver according to claim 1, wherein a tube circuit section is configured. 3. The high frequency section structure of a radio transmitter / receiver according to claim 1, wherein the waveguide circuit section made of a plate member is provided on the other surface section of the housing. 4. The high frequency section structure of a radio transmitting / receiving apparatus according to claim 1, wherein a dielectric filter is provided by disposing a dielectric in the waveguide circuit section. 5. A post type by forming a hole in both or one of the housing and the lid member, mounting a pin in the hole, and disposing the pin in the waveguide circuit section. The high frequency section structure of the radio transmitter / receiver according to claim 1, wherein a filter is provided. 6. A post type filter is provided by forming a hole in the plate member, mounting a pin in the hole, and disposing the pin in the waveguide circuit section. The high frequency section structure of the wireless transmitter-receiver according to claim 3. 7. The high frequency section structure of a radio transmitting / receiving apparatus according to claim 1, wherein a circulator is provided in the waveguide circuit section. 8. A structure of an intermediate frequency part of a radio transmitter / receiver, comprising: a printed circuit board on which an electric circuit for the intermediate frequency part is mounted; and a shield cover for covering the printed circuit board, and an end face of the shield cover is U-shaped. Bent to form the fixed surface of the printed circuit board and the pressing portion integrally, and at a portion of the shield cover facing the pressing portion,
A leaf spring for locking the printed circuit board is provided, and a protrusion for preventing the printed circuit board from being displaced on a side portion of the shield cover different from the holding portion and the leaf spring disposition portion. Characterized in that a part is formed,
The structure of the intermediate frequency part of the wireless transceiver.