JP2008199196A - Mounting structure of directional coupler, and directional coupler - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting structure of a directional coupler wherein isolation between a main output signal terminal and a sub output signal terminal to be output with a prescribed distribution ratio is improved, and to provide the directional coupler. <P>SOLUTION: The directional coupler 1' is provided with magnetic body substrates 2-1 and 2-2, a laminate body 3 including first and second transformers 5 and 6, and external electrodes 4-1 to 4-6. The external electrode 4-2 connected to one end of the primary side coil 5-1 of the first transformer 5 is turned to the input signal terminal of signals and the external electrode 4-1 connected to the other end is turned to the main output signal terminal. The external electrode 4-3 connected to the other end of the secondary side coil 6-2 of the second transformer 6 is turned to the sub output signal terminal of sub output signals. A capacitor 8 constituted of flat electrode patterns 81 and 82 is laminated and formed on the magnetic body substrate 2-2, the terminal 81a of the capacitor 8 is connected to the external electrode 4-5 connected to a terminating resistor, and the terminal 82a is connected to the grounded external electrode 4-4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a directional coupler mounting structure and a directional coupler applied to a mobile communication device such as a mobile phone.

Conventionally, as this type of directional coupler, there is one disclosed in Non-Patent Document 1, for example.
As shown in FIG. 18, the directional coupler 100 is obtained by winding an electrode 102 around a glasses-shaped magnetic core 101, and has a circuit configuration as shown in FIG.
With such a configuration, the winding ratio of the coil 112 with respect to the coil 111 of the transformer 110 is set as appropriate, and the winding ratio of the coil 121 with respect to the coil 122 of the transformer 120 is set as appropriate, for example, input from the port 110b of the transformer 110. The output signal S can be output as the main output signal S1 from the port 110a and also as the sub output signal S2 from the port 120b of the transformer 120. At this time, the main output signal S1 and the sub output signal S2 can be output at a distribution ratio corresponding to the winding ratio of the transformers 110 and 120. Note that the resistor R shown in FIGS. 18 and 19 is a terminating resistor.

Michael G. Ellis, “RF Directional Couplers”, Electronic System Products, [Search May 20, 2005], Internet <http: // members.tripod.com/michaelgellis/direct.html>

However, the directional coupler 100 described above has a problem that the isolation between the port 110a from which the main output signal S1 is output and the port 120b from which the sub output signal S2 is output is poor.
That is, the high frequency component of the input signal S input from the port 110 b is easily coupled with a minute inductance component or capacitance component generated inside the directional coupler 100. For this reason, the isolation between the port 110a and the port 120b may be deteriorated in the high frequency region.

  The present invention has been made to solve the above-described problems, and is a mounting structure for a directional coupler in which isolation between a main output signal terminal and a sub output signal terminal output at a predetermined distribution ratio is improved. And it aims at providing a directional coupler.

In order to solve the above-mentioned problems, the invention of claim 1 includes a first magnetic substrate, a laminate that is laminated on the first magnetic substrate and has first and second transformers formed therein, and A second magnetic substrate provided on the laminated body, and an input signal terminal for inputting a signal and a main output signal for outputting both terminals of the primary side coil of the first transformer. The main output signal terminal, one terminal of the secondary coil as a ground terminal, the other terminal connected to one terminal of the secondary coil of the second transformer, and the primary coil of the second transformer Directionality in which one terminal is connected to the main output signal terminal of the first transformer, the other terminal is connected to the ground terminal, and the other terminal of the secondary coil is a sub output signal terminal that outputs a sub output signal. The coupler mounting structure, the input signal end The main output signal terminal is connected to the input line and the main output line, the sub output signal terminal is connected to the sub output line, and a grounded termination resistor is connected to one terminal of the secondary coil of the second transformer. In addition to being connected from the outside, a grounded capacitor is connected to the one terminal from the outside in parallel with the termination resistor.
With this configuration, when a signal is input from the input line to the input signal terminal of the directional coupler, the main output signal is output from the main output signal terminal of the first transformer to the main output line, and the sub output signal is It is output to the sub output line from the sub output signal terminal of the two transformers. At this time, the high-frequency component of the signal input to the directional coupler is likely to be coupled to minute inductance components and capacitance components generated in internal circuits such as the first and second transformers of the directional coupler. For this reason, in the high frequency region, the isolation between the main output signal terminal and the sub output signal terminal may be lowered. However, in the present invention, the high-frequency component induced between these terminals is removed through the capacitor connected to one terminal of the second transformer, so that the isolation between the main output signal terminal and the sub output signal terminal is achieved. Improved.

According to a second aspect of the present invention, there is provided a first magnetic substrate, a laminate that is laminated on the first magnetic substrate and has first and second transformers formed therein, and a first laminate provided on the laminate. Two magnetic substrates, and each of both terminals of the primary coil of the first transformer as an input signal terminal for inputting a signal and a main output signal terminal for outputting a main output signal, One terminal of the secondary coil is used as a ground terminal, the other terminal is connected to one terminal of the secondary coil of the second transformer, and one terminal of the primary coil of the second transformer is connected to the first transformer. A directional coupler which is connected to a main output signal terminal and has the other terminal connected to a ground terminal and the other terminal of the secondary coil as a sub output signal terminal for outputting a sub output signal. Inside, underside of first magnetic substrate or second magnetism To one of the upper substrate, whereas a structure in which the end has a capacitor one of the connected and the other end to a terminal of the second transformer secondary coil is connected to the ground terminal and laminated.
With this configuration, the input signal terminal and the main output signal terminal are connected to the input line and the main output line, respectively, and the sub output signal terminal is connected to the sub output line, and is connected to one terminal of the secondary coil of the second transformer. By connecting a grounded termination resistor from the outside, it operates as a directional coupler. That is, when a signal is input from the input line to the input signal terminal, the main output signal is output from the main output signal terminal of the first transformer to the main output line, and the sub output signal is output to the sub output signal terminal of the second transformer. To the secondary output line. At this time, the high-frequency component of the signal is easily coupled to the minute inductance component and capacitance component generated in the internal circuits such as the first and second transformers of the directional coupler. There is a possibility that the isolation between the output signal terminal and the sub output signal terminal is lowered. However, in the present invention, the high frequency component induced between these terminals is removed through a capacitor connected to one terminal of the secondary coil, and the isolation between the main output signal terminal and the sub output signal terminal is achieved. Improved.

  As described above in detail, according to the present invention, the high frequency component induced between the main output signal terminal and the sub output signal terminal of the directional coupler can be removed through the capacitor. There is an excellent effect that the isolation between the signal terminal and the sub output signal terminal is enhanced, and the main output signal and the sub output signal having a desired distribution ratio can be obtained.

  The best mode of the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view showing a mounting structure of a directional coupler according to a first embodiment of the present invention, and FIG. 2 is an exploded perspective view of the directional coupler.

  As shown in FIG. 1, in the mounting structure of the directional coupler 1 of this embodiment, an external electrode 4-2 that is an input signal terminal of a signal S and an external electrode 4- that is a main output signal terminal of a main output signal S1. 1 are connected to the input line 200 and the main output line 201, respectively, and the external electrode 4-3, which is a sub output signal terminal of the sub output signal S2, is connected to the sub output line 202. A termination resistor R was connected to the external electrode 4-5 and grounded. Further, a capacitor C was connected to the external electrode 4-5 and grounded. That is, the capacitor C and the terminating resistor R are connected in parallel to the external electrode 4-5 of the directional coupler 1 and grounded.

  The directional coupler 1 applied to this embodiment includes a magnetic substrate 2-1 as a first magnetic substrate, a stacked body 3 stacked on the magnetic substrate 2-1, and the stacked body 3 It comprises a magnetic substrate 2-2 as a second magnetic substrate bonded on top and external electrodes 4-1 to 4-6.

  As shown in FIG. 2, the multilayer body 3 includes a first transformer 5, a second transformer 6, and nonmagnetic layers 71 to 75 that completely cover the first and second transformers 5 and 6 from the outside. Have.

Each of the nonmagnetic layers 71 to 75 is a dielectric, and the first and second transformers 5 and 6 are patterned on the nonmagnetic layers 71 to 74.
Specifically, the first transformer 5 includes a primary side coil 5-1 and a secondary side coil 5-2 thereon. The primary coil 5-1 is formed of a conductor pattern 51 and a conductor pattern 52, and the secondary coil 5-2 is formed of a conductor pattern 53 and a conductor pattern 54.
On the other hand, the second transformer 6 includes a primary side coil 6-1 and a secondary side coil 6-2 thereon. The primary coil 6-1 is formed of a conductor pattern 63 and a conductor pattern 64, and the secondary coil 6-2 is formed of a conductor pattern 61 and a conductor pattern 62.

Here, the structure of the first and second transformers 5 and 6 will be described in detail.
The lowermost conductor patterns 51 and 64 are obtained by forming a conductor film by sputtering on the nonmagnetic material layer 71 laminated on the magnetic substrate 2-1, and forming a resist pattern (not shown) on the conductor film. The pattern was formed by etching. Then, the nonmagnetic layer 72 was laminated on the conductor patterns 51 and 64. The nonmagnetic layer 72 is formed by applying a photosensitive insulating paste and photolithography. Then, conductor patterns 52 and 63 were formed on the nonmagnetic material layer 72. Hereinafter, the conductor patterns 51 to 54 and the conductor patterns 61 to 64 are also formed by the same method as the conductor patterns 51 and 64, and the nonmagnetic layers 71 to 75 are also formed by the same method as the nonmagnetic layer 72. Hereinafter, description regarding the method of forming each conductor pattern and non-magnetic layer is omitted.
3 is a plan view of the conductor patterns 51 and 64, FIG. 4 is a plan view of the nonmagnetic layer 72, FIG. 5 is a plan view of the conductor patterns 52 and 63, and FIG. 3 is an exploded perspective view showing a connection structure between patterns 51 and 64 and conductor patterns 52 and 63. FIG.
As shown in FIG. 3, the conductor pattern 51 has an internal electrode 51a drawn out from the inside and an end 51b inside the pattern. As shown in FIG. 5, the conductor pattern 52 has an internal electrode 52a drawn to the outside and an end 52b on the inside.
As shown in FIG. 6, the end 51b of the conductor pattern 51 and the end 52b of the conductor pattern 52 are connected through the through hole 72b of the nonmagnetic layer 72 also shown in FIG. Thereby, a spiral primary coil 5-1 having both ends of the internal electrodes 51a and 52a is formed.
On the other hand, as shown in FIG. 3, the conductor pattern 64 has an internal electrode 64a led out to the outer central portion (position corresponding to the internal electrode 52a) of the adjacent conductor pattern 51, and the internal electrode 64a Left-side ends 64b to 64d and right-side ends 64e to 64h are alternately arranged on the side opposite to the drawn-out side. As shown in FIG. 5, the conductor pattern 63 has an internal electrode 63a drawn from the inside to the center between the conductor patterns 52 and 63, and a pattern is formed on the left side of the lead line of the internal electrode 63a. End portions 63b to 63d are disposed, and end portions 63e to 63h are disposed on the right side. As shown in FIG. 6, the end portions 64b to 64d of the conductor pattern 64 and the end portions 63b to 63d of the conductor pattern 63 are connected through the through holes 72b 'to 72d' of the non-magnetic layer 72 also shown in FIG. The end portions 64e to 64h of the conductor pattern 64 and the end portions 63e to 63h of the conductor pattern 63 are connected through through holes 72e 'to 72h'. As a result, a spiral primary coil 6-1 having both ends of the internal electrodes 64a and 63a is formed.
The lead wires of the internal electrodes 52 a and 64 a are connected through the through hole 72 j of the nonmagnetic layer 72.

As shown in FIG. 2, the conductor patterns 53 and 62 are formed on a nonmagnetic material layer 73 laminated on the conductor patterns 52 and 63. After the nonmagnetic layer 74 is laminated on the conductor patterns 53 and 62, the conductor patterns 54 and 61 are patterned on the nonmagnetic layer 74.
7 is a plan view of the conductor patterns 53 and 62, FIG. 8 is a plan view of the nonmagnetic material layer 74, FIG. 9 is a plan view of the conductor patterns 54 and 61, and FIG. It is a disassembled perspective view which shows the connection structure of the patterns 53 and 62 and the conductor patterns 54 and 61. FIG.
As shown in FIG. 7, the conductor pattern 53 has an internal electrode 53a drawn from the inside to the center between the conductor patterns 53 and 62, and the end of the pattern is on the right side of the lead line of the internal electrode 53a. The parts 53b to 53d are arranged, and the end parts 53e to 53h are arranged on the left side. Further, as shown in FIG. 9, the conductor pattern 54 has an internal electrode 54a drawn out to the outer central portion (position corresponding to the internal electrode 62a) of the adjacent conductor pattern 61, and the internal electrode 54a Right-side ends 54b to 54d and left-side ends 54e to 54h are alternately arranged on the side opposite to the drawn-out side.
And as shown in FIG. 10, the edge parts 53b-53d of the conductor pattern 53 and the edge parts 54b-54d of the conductor pattern 54 are connected through the through holes 74b-74d of the nonmagnetic layer 74 also shown in FIG. End portions 53e to 53h of the conductor pattern 53 and end portions 54e to 54h of the conductor pattern 54 are connected through through holes 74e to 74h. As a result, a spiral secondary coil 5-2 having both ends of the internal electrodes 53a and 54a is formed.
On the other hand, as shown in FIG. 7, the conductor pattern 62 has an internal electrode 62 a drawn to the outside and an end portion 62 b located on the inside. As shown in FIG. 9, the conductor pattern 61 has an internal electrode 61a drawn from the inside and an end 61b on the inside. As shown in FIG. 10, the end 62b of the conductor pattern 62 and the end 61b of the conductor pattern 61 are connected through a through hole 74b ′ of the nonmagnetic layer 74 also shown in FIG. As a result, a spiral secondary coil 6-2 having the internal electrodes 62a and 61a at both ends is formed.
The lead wires of the internal electrodes 54 a and 62 a are connected through the through hole 74 j of the nonmagnetic material layer 72.
As shown in FIG. 2, a nonmagnetic layer 75 is laminated on the conductor patterns 54 and 61, and the magnetic substrate 2-2 is bonded onto the nonmagnetic layer 75.

As shown in FIG. 1, the external electrodes 4-1 to 4-6 are formed outside the multilayer body 3 having the above structure.
Thereby, as shown in FIG. 2, the external electrode 4-1 is electrically connected to both the internal electrodes 52a and 64a of the conductor patterns 52 and 64, and the external electrode 4-2 is connected to the internal electrode 51a of the conductor pattern 51. Electrically connected. The external electrode 4-3 is electrically connected to the internal electrode 61a of the conductor pattern 61, the external electrode 4-4 is electrically connected to both the internal electrodes 53a and 63a of the conductor patterns 53 and 63, and externally. The electrode 4-5 is electrically connected to both the internal electrodes 54a and 62a of the conductor patterns 54 and 62.

FIG. 11 is a schematic diagram showing an electrical structure of the directional coupler 1.
By connecting the conductor patterns as described above or connecting the external electrodes 4-1 to 4-6 and the internal electrodes, the electrical structure becomes a circuit structure as shown in FIG.
That is, the external electrode 4-2 connected to the internal electrode 51a of the primary coil 5-1 of the first transformer 5 is used as an input signal terminal for the signal S, and the external electrode 4-1 connected to the internal electrode 52a is the main output signal. The main output signal terminal of S1. The external electrode 4-4 connected to the internal electrode 53a, which is one terminal of the secondary coil 5-2, is used as a ground terminal. Further, the internal electrode 64a which is one terminal of the primary coil 6-1 of the second transformer 6 is connected to the internal electrode 52a which is one terminal of the primary coil, and the internal electrode which is the other terminal. 63a is connected to the external electrode 4-4 via the internal electrode 53a of the secondary coil 5-2 of the first transformer 5. The internal electrode 62a that is one terminal of the secondary coil 6-2 is connected to the external electrode 4-5 via the internal electrode 54a that is the other terminal of the secondary coil 5-2 of the first transformer 5. is doing. The external electrode 4-3 connected to the internal electrode 61a which is the other terminal of the secondary coil 6-2 was used as a sub output signal terminal of the sub output signal S2.

Next, the operation and effect of this embodiment will be described.
FIG. 12 is an equivalent circuit diagram of the mounting structure of the directional coupler of this embodiment shown in FIG.
When the directional coupler 1 has an electrical structure as shown in FIG. 11, the mounting structure in FIG. 1 can be represented by an equivalent circuit diagram as shown in FIG.
As shown in FIGS. 12 and 1, when the signal S is transmitted to the input line 200, the signal S is input from the external electrode 4-2 into the directional coupler 1. Then, the main output signal S1 is output from the external electrode 4-1 to the main output line 201, and the sub output signal S2 is output from the external electrode 4-3 to the sub output line 202. That is, the signal S input to the directional coupler 1 is distributed and output to the main output line 201 and the sub output line 202 at a distribution ratio corresponding to the winding length ratio of the first transformer 5 and the second transformer 6. .
By the way, the high frequency component of the signal is easy to be coupled to a minute inductance component or capacitance component generated in the internal circuit such as the first and second transformers 5 and 6. For this reason, in the high frequency region, there is a possibility that high frequency components are combined with these minute components and the isolation between the external electrodes 4-1 and 4-3 of the directional coupler 1 is lowered. As a result, the main output signal S1 output from the main output line 201 and the sub output signal S2 output to the sub output line 202 may not be output at a desired distribution ratio.
However, in this embodiment, since the capacitor C is connected to the external electrode 4-5 from the outside and grounded, the capacitor C changes the minute inductance component and the capacitance component that cause a decrease in isolation. Let As a result, the isolation between the external electrodes 4-1 and 4-3 is improved. Further, the capacitor C functions as a pass capacitor when grounded, and reduces high frequency components induced between the external electrodes 4-1 and 4-3.
Thus, according to this embodiment, the main output signal S1 and the sub output signal S2 are output from the external electrodes 4-1 and 4-3 at a desired distribution ratio.

Next explained is the second embodiment of the invention.
FIG. 13 is an exploded perspective view of the directional coupler according to the second embodiment of the present invention.
The directional coupler 1 'of this embodiment has a structure in which a capacitor 8 is laminated on the magnetic substrate 2-2 of the directional coupler 1 applied to the first embodiment.
Since the laminated portion of the magnetic substrate 2-1, the laminated body 3, and the magnetic substrate 2-2 is the same as the structure of the directional coupler 1 of the first embodiment, the same reference numerals are used for explanation. .
As shown in FIG. 13, the capacitor 8 is composed of planar electrode patterns 81 and 82.
Specifically, a nonmagnetic layer 76 that is a dielectric is laminated on the magnetic substrate 2-2, and a planar electrode pattern 81 is formed on the nonmagnetic layer 76. Then, after laminating a nonmagnetic layer 77 as a dielectric on the planar electrode pattern 81, a planar electrode pattern 82 was formed on the nonmagnetic layer 77. The planar electrode pattern 82 is covered with a nonmagnetic layer 78 from above.

FIG. 14 is a plan view showing the planar electrode pattern 81, and FIG. 15 is a plan view showing the planar electrode pattern 82.
As shown in FIG. 14, the planar electrode pattern 81 is a rectangular planar body, and a terminal 81a extends to the left side. The terminal 81a is formed at a position corresponding to the internal electrodes 54a and 62a of the conductor patterns 54 and 62, as shown by a one-dot chain line in FIG.
Further, as shown in FIG. 15, the planar electrode pattern 82 has the same shape as the planar electrode pattern 81, and its terminal 82a extends to the center. The terminal 82a is formed at a position corresponding to the internal electrodes 53a and 63a of the conductor patterns 53 and 63, as indicated by a two-dot chain line in FIG.
As a result, the planar electrode pattern 81 and the planar electrode pattern 82 are opposed to each other with the nonmagnetic material layer 77 being a dielectric interposed therebetween, thereby forming a capacitor 8 having a predetermined capacity. And the terminal 81a which is one terminal of the capacitor | condenser 8 is connected to the internal electrode 62a of the secondary side coil 6-2 of the 2nd transformer 6 via the external electrode 4-5. Further, the terminal 82a which is the other terminal of the capacitor 8 is connected to the external electrode 4-4 which is a ground terminal.

Next, the operation and effect of the directional coupler of this embodiment will be described.
FIG. 16 is an equivalent circuit diagram of the directional coupler of this embodiment.
As shown in FIG. 16, when the signal S is transmitted to the input line 200, the main output signal S1 and the sub output signal S2 are transmitted to the main output line 201 and the sub output line 202 in the same manner as in the first embodiment. Output in the distribution ratio.
At this time, in the same manner as in the first embodiment, in the high frequency region, the high frequency component is coupled to a minute inductance component or capacitance component, so that the isolator between the external electrodes 4-1 and 4-3 of the directional coupler 1 'is isolated. May decrease
However, in this embodiment, the capacitor 8 is laminated on the upper side of the magnetic substrate 2-2, both ends are connected between the external electrodes 4-4 and 4-5, and the capacitor 8 is built in the directional coupler 1 '. With this configuration, the capacitor 8 changes the minute inductance component and capacitance component generated inside, and the isolation between the external electrodes 4-1 and 4-3 is improved. Therefore, also in this embodiment, the main output signal S1 and the sub output signal S2 can be output from the external electrodes 4-1 and 4-3 at a desired distribution ratio.

The inventors conducted the following experiment in order to confirm the effect of this embodiment.
FIG. 17 is a diagram showing the results of the experiment.
In this experiment, first, a signal S having a frequency in a range of about 70 MHz to about 3 GHz is input from the external electrode 4-2 using the directional coupler 1 having no capacitor 8, and the external electrodes 4-1 and 4-3 are input. The isolation value (dB) between the external electrodes 4-1 and 4-3 was measured based on the main output signal S1 and the sub-output signal S2 output from.
Then, as indicated by the curve I0 in FIG. 17, it was confirmed that the minimum value was −25 dB at about 400 MHz, and the isolation value increased and deteriorated as the frequency increased.
Next, the same measurement as described above was performed using the directional coupler 1 ′ in which the capacitance value of the capacitor 8 was set to 1.0 pF, 1.5 pF, 2.0 pF, and 2.5 pF, respectively.
Then, as indicated by curves I1 to I4 in FIG. 17, although the isolation value increases as the frequency increases with the lowest value being about 400 MHz, it does not exceed −20 dB. From this measurement result, it was confirmed that the isolation was significantly improved in the antenna module 1 ′ having the capacitor 8. In particular, it was confirmed that the directional coupler 1 ′ having the 1.5 pF capacitor 8 exhibits very good isolation characteristics over a wide frequency range.
Since other configurations, operations, and effects are the same as those in the first embodiment, description thereof is omitted.

In addition, this invention is not limited to the said Example, A various deformation | transformation and change are possible within the range of the summary of invention.
For example, in the second embodiment, the directional coupler 1 ′ having a structure in which the capacitor 8 is laminated on the magnetic substrate 2-2 of the directional coupler 1 applied to the first embodiment is illustrated. However, the location where the capacitor 8 is formed is not limited to this. For example, a directional coupler in which the capacitor 8 is laminated in the laminate 3 and a directional coupler in which the capacitor 8 is laminated below the magnetic substrate 2-1 are also included in the scope of the present invention.

It is a perspective view which shows the mounting structure of the directional coupler which concerns on 1st Example of this invention. It is a disassembled perspective view of a directional coupler. It is a top view of the lowermost conductor pattern. It is a top view of a nonmagnetic material layer. It is a top view of the conductor pattern of the 2nd layer. It is a disassembled perspective view which shows the connection structure of the lowermost conductor pattern and the 2nd layer conductor pattern. It is a top view of the conductor pattern of the 3rd layer. It is a top view of a nonmagnetic material layer. It is a top view of the uppermost conductor pattern. It is a disassembled perspective view which shows the connection structure of the conductor pattern of a 3rd layer, and the uppermost conductor pattern. It is a schematic diagram which shows the electrical structure of a directional coupler. It is an equivalent circuit diagram of the mounting structure of the directional coupler of this embodiment shown in FIG. It is a disassembled perspective view of the directional coupler which concerns on 2nd Example of this invention. It is a top view which shows the lower plane electrode pattern. It is a top view which shows the planar electrode pattern of an upper layer. It is an equivalent circuit schematic of the directional coupler of 2nd Example. It is a diagram which shows the result of experiment. It is a perspective view which shows an example of the conventional directional coupler. FIG. 19 is an equivalent circuit diagram of the directional coupler of FIG. 18.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,1 '... Directional coupler, 2-1, 2-2 ... Magnetic substrate, 3 ... Laminated body, 4-1 to 4-6 ... External electrode, 5 ... First transformer, 5-1, 6 DESCRIPTION OF SYMBOLS 1 ... Primary coil, 6 ... 2nd transformer, 8, C ... Capacitor, 51-54, 61-64 ... Conductor pattern, 51a-54a, 61a-64a ... Internal electrode, 51b-51h, 52b-52h, 53b -53h, 54b-54h, 61b-61h, 62b-62h, 63b-63h, 64b-64h ... end, 72b-72h, 72j, 72b'-72h ', 74b-74h, 74j, 74b'-74h' ... Through holes, 71 to 78, nonmagnetic layers, 81, 82, planar electrode patterns, 81a, 82a, terminals, 200, input lines, 201, main output lines, 202, sub output lines, S, input signals, 1 ... main output signal, S2 ... sub output signal.

Claims (2)

A first magnetic substrate; a laminated body laminated on the first magnetic substrate and having first and second transformers formed therein; and a second magnetic substrate provided on the laminated body. Each of the terminals of the primary coil of the first transformer is used as an input signal terminal for inputting a signal and a main output signal terminal for outputting a main output signal, and one of the secondary coils. And the other terminal is connected to one terminal of the secondary coil of the second transformer, and one terminal of the primary coil of the second transformer is the main output of the first transformer. The directional coupler mounting structure is connected to a signal terminal and the other terminal is connected to the ground terminal, and the other terminal of the secondary coil is a sub output signal terminal that outputs a sub output signal.
The input signal terminal and the main output signal terminal are connected to the input line and the main output line, respectively, and the sub output signal terminal is connected to the sub output line.
A grounded termination resistor is connected to one terminal of the secondary coil of the second transformer from the outside, and a grounded capacitor is connected to the one terminal from the outside in parallel with the termination resistor.
A mounting structure of a directional coupler characterized by that. A first magnetic substrate; a laminated body laminated on the first magnetic substrate and having first and second transformers formed therein; and a second magnetic substrate provided on the laminated body. ,
Each of both terminals of the primary side coil of the first transformer is used as an input signal terminal for inputting a signal and a main output signal terminal for outputting a main output signal. Connect the terminal as a ground terminal and the other terminal to one terminal of the secondary coil of the second transformer,
One terminal of the primary coil of the second transformer is connected to the main output signal terminal of the first transformer, the other terminal is connected to the ground terminal, and the other terminal of the secondary coil is connected to the sub-terminal. A directional coupler having a secondary output signal terminal for outputting an output signal,
One end is connected to one terminal of the secondary coil of the second transformer and the other end is either inside the laminated body, below the first magnetic substrate or above the second magnetic substrate. Was formed by stacking capacitors connected to the ground terminal,
A directional coupler characterized by that.

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