CN201663596U - Cavity pre/post-selector - Google Patents
Cavity pre/post-selector Download PDFInfo
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- CN201663596U CN201663596U CN2010201331920U CN201020133192U CN201663596U CN 201663596 U CN201663596 U CN 201663596U CN 2010201331920 U CN2010201331920 U CN 2010201331920U CN 201020133192 U CN201020133192 U CN 201020133192U CN 201663596 U CN201663596 U CN 201663596U
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Abstract
The utility model discloses a cavity pre/post-selector, which is arranged inside a receiver and a transmitter which are provided with control units. The cavity pre/post-selector comprises a digital control circuit, a switching diode driving circuit and a resonator, wherein the resonator consists of a switching diode capacitor array and a resonant inductor; the control units send eight-bit binary codes to the digital control circuit which controls the switching diode driving circuit; the switching diode driving circuit controls the on-off of switching diodes in the switching diode capacitor array; one or more paths of capacitors in the switching diode capacitor array are selected to generate resonance with the resonant inductor; and a resonant cavity select to transmit wanted signals with specific frequency points from carrier signals so as to restrain unwanted signals. The on-off of the switching diodes in the switching diode capacitor array can be controlled by the digital control circuit to realize the transmission of the carrier signals with different frequency points and fast switch the carrier frequencies of the wanted signals, so that the anti-interference ability is improved.
Description
Technical field
The utility model relates to digital tuning frequency hopping communications technology, relates in particular to a kind of cavity prognosis and selects device.
Background technology
Frequency hopping be a kind of have high noise immunity, high anti-intercept and capture the spread spectrum of ability.Traditional decide frequency communication system carrier fixed-frequency, interference free performance is poor, in the tactics electronic countermeasures, is easy to be intercepted and captured by the enemy information content of transmission, or finds orientation, communication equipment place and give away one's position.Improve radio communication performance, improve its antijamming capability, become the important topic of military communication technological innovation and development.Prognosis select device for suppress near the unwanted signal the frequency that requires improve a lot, help improving the performance of receiver.
What the device employing was selected in traditional prognosis is lc circuit, and its Q value is about about 20-30.The selectivity of single carrier ± 2.5% is about 8dB; Not too can satisfy the anti-interference requirement of modern military radio station combination.
The utility model content
The utility model embodiment technical problem to be solved is, provides the better cavity prognosis of a kind of anti-interference to select device.
In order to solve the problems of the technologies described above, the utility model embodiment provides
Device is selected in a kind of cavity prognosis, it is arranged in the Receiver And Transmitter, be provided with control unit in this Receiver And Transmitter, this cavity prognosis selects device to comprise: digital control circuit, switching diode drive circuit, resonant cavity, described resonant cavity comprise the resonator that become with the resonance inductive bank by the switching diode capacitor array;
Described control unit sends the eight-digit binary number sign indicating number to described digital control circuit, this eight-digit binary number sign indicating number comprises eight bit address sign indicating numbers and eight bit data sign indicating number, whether digital control circuit receives eight bit address sign indicating number judging prognosis and selects device to work, as work then control according to the eight-digit binary number data sign indicating number that is received as described in the switching diode drive circuit, by the break-make of switching diode in the described switching diode drive circuit control switch diode capacitance array; Thereby one or more capacitor array in the selector switch diode capacitance array and described resonant inductance produce resonance, described resonant cavity selects to transmit the useful signal of characteristic frequency point in received carrier signal, suppress unwanted signal, described characteristic frequency point is meant the resonance frequency that selected capacitor array and resonant inductance produce.
Preferably, above-mentioned resonant cavity is the square cavity structure of sealing.
Preferably, last resonant cavity includes two resonators, is respectively first resonator and second resonator, and is connected with coupler in the middle of first resonator and second resonator, dual tuner is regulated coupling by the coupler of centre, the degree of coupling of control double tuned circuit.
Preferably, above-mentioned resonant cavity also includes first impedance matching box and second impedance matching box, the carrier signal that receives is successively through first impedance matching box and first resonator output useful signal, this useful signal is coupled through described coupler, and the useful signal after the coupling enters second resonator more successively and second impedance matching box carries out frequency-selecting output.
Preferably, above-mentioned resonant cavity is the quarter-wave capacitive load formula resonant cavity that quarter-wave terminal short circuit coaxial transmission line and switching diode capacitor array are formed by length.
Preferably, be provided with memory in the above-mentioned control circuit, this memory stores has the data of each resonant frequency point.
Preferably, above-mentioned switching diode capacitor array comprises ten one road capacitor arrays.
Preferably, above-mentioned digital control circuit includes the TTL circuit, and described digital control circuit is by the break-make of the Transistor-Transistor Logic level control switch diode drive circuit of each resonance point of output.
Preferably, above-mentioned cavity prognosis selects carrier signal wave band that device receives within 2 to 30MHZ scope.
The utility model compared with prior art has the following advantages: because cavity prognosis of the present utility model selects device to pass through the break-make of switching diode in the digital control circuit control switch diode capacitance array, thereby can realize that the cavity prognosis selects the transmission of device to the different frequent points carrier signal, and can switch the carrier frequency of useful signal rapidly, improved antijamming capability.Cavity prognosis of the present utility model selects device to adopt the cavity mode to substitute the lc circuit of prior art, the Q value can improve 50-60, ± 2.5% selectivity is brought up to about 15dB, and Insertion Loss adopts the index of lc circuit mode to be enhanced about more than once less than 5.4dBm than prior art.And cavity prognosis of the present utility model selects device to adopt double tunning, the resonant cavity formula structure of quarter-wave capacitive load formula, when the capacitance network resonance in switching diode and the capacitor array, the little filter of rejection ratio LC near the unwanted signal the requirement frequency improves a lot, so anti-interference is better.
Description of drawings
Fig. 1 is the structural representation that the embodiment 1 of device is selected in a kind of cavity prognosis of the utility model embodiment;
Fig. 2 is the structural representation that the embodiment 2 of device is selected in a kind of cavity prognosis of the utility model embodiment;
Fig. 3 is the typical characteristics curve chart that device is selected in a kind of cavity prognosis of the utility model embodiment.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, the utility model is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1, device is selected in a kind of cavity prognosis, and it is arranged in the Receiver And Transmitter, is provided with control unit (not indicating among the figure) in this Receiver And Transmitter, and the cavity prognosis selects device to comprise two parts: a part is digital control part; A part is a radio frequency part.Two parts circuit uses dielectric film to isolate, and adopts the modular construction assembling.First kind of execution mode of device selected in prognosis as the utility model cavity, and wherein the cavity prognosis selects the digital control part of device to comprise:
Digital control circuit 100, switching diode drive circuit 200, resonant cavity 300, resonant cavity 300 comprise the resonator of being made up of switching diode capacitor array 310 and resonant inductance 320 301;
Control unit (not indicating among the figure) sends the eight-digit binary number sign indicating number to digital control circuit 100, this eight-digit binary number sign indicating number comprises eight bit address sign indicating numbers and eight bit data sign indicating number, whether digital control circuit 100 receives the automatic judging prognosis of eight bit address sign indicating numbers and selects device to work, as working then according to the eight bit data sign indicating number control switch diode drive circuit 200 that is received, by the break-make of switching diode in the switching diode drive circuit 200 control switch diode capacitance arrays 310; Thereby one or more capacitor array in the selector switch diode capacitance array 310 and resonant inductance 320 produce resonance, resonant cavity 300 selects to transmit the useful signal of characteristic frequency point in received carrier signal, suppress unwanted signal, the characteristic frequency point is meant the resonance frequency of the resonator 301 that selected capacitor array and inductance are formed.
Preferably, resonant cavity 300 is the square cavity structure of sealing.Switching diode drive circuit 200 is a high-voltage drive, and this high-voltage drive is taken all factors into consideration and selected the big and fast CMOS triode of frequency hopping of current/voltage for use according to the CMOS triode that the filtering demand adopts withstand voltage anti-stream parameter and frequency hopping speed parameter to be complementary.
Because cavity prognosis of the present utility model selects device to pass through the break-make of switching diode in the digital control circuit 100 control switch diode capacitance arrays 310, thereby can realize that the cavity prognosis selects the transmission of device to the different frequent points carrier signal, and can switch the carrier frequency of useful signal rapidly, improved antijamming capability.Cavity prognosis of the present utility model selects device to adopt the cavity mode to substitute lc circuit, and the Q value can improve 50-60, and ± 2.5% selectivity is brought up to about 15dB, and Insertion Loss adopts the index of lc circuit mode to be enhanced about more than once less than 5.4dBm than prior art.
Preferably, resonant cavity 300 is the quarter-wave capacitive load formula resonant cavity 300 that quarter-wave terminal short circuit coaxial transmission line and switching diode capacitor array 310 are formed by length.
Preferably, be provided with memory in the control circuit, this memory stores has the data of each resonant frequency point.
Preferably, switching diode capacitor array 310 comprises ten one road capacitor arrays.
Preferably, digital control circuit 100 includes the TTL circuit, and digital control circuit 100 is by the break-make of the Transistor-Transistor Logic level control switch diode drive circuit 200 of each resonance point of output.
Preferably, the cavity prognosis selects carrier signal wave band that device receives within 2 to 30MHZ scope.The utility model is a kind ofly to have low-noise factor in HF wave band (2-30MHz) work, and inband flatness is good, and device is selected in the shortwave prognosis of high OIP3, high selectivity.
Cavity prognosis of the present utility model selects the workflow of device as follows:
Receiver And Transmitter is provided with control unit (not indicating among the figure), the control unit of receiver/transmitter (not indicating among the figure) selects device to send the eight bit address sign indicating numbers and the eight bit data sign indicating number of the frequency of carrier signal of required resonance to the cavity prognosis, and control unit (not indicating among the figure) joins with the address bus of the digital control circuit 100 of cavity preselector.Particularly, cavity prognosis of the present utility model selects the digital control circuit 100 of device to adopt the AT29C1024 memory.At first the data of each resonant frequency point are write in the AT29C1024 memory, after sending the eight bit address sign indicating numbers and eight bit data sign indicating number of 2MHz as the control unit of receiver (indicating among the figure), the digital control circuit 100 of cavity preselector receives eight bit address sign indicating numbers and the eight bit data sign indicating number that control units (indicating among the figure) are sent; Whether digital control circuit 100 selects device to work according to the automatic judging prognosis of eight bit address sign indicating numbers that is received, if work then export ten one road Transistor-Transistor Logic levels according to reception eight bit data sign indicating number and control prognosis and select device switching diode drive circuit 200, switching diode capacitor array 310, the resonator 301 switch inside diode capacitance arrays 310 of drive circuit control resonant cavity 300, the break-make of switching diode in the control switch diode capacitance array 310, thereby select certain road electric capacity and resonant inductance 320 in ten one tunnel to produce resonance, thereby resonant cavity 300 selects to transmit the useful signal of characteristic frequency point in received carrier signal, suppress not have signal is arranged, wherein, the characteristic frequency point is meant the resonance frequency of the resonator 301 that selected capacitor array and inductance are formed.
The cavity prognosis selects device to adopt the cavity mode to substitute the lc circuit of prior art, and the Q value can improve 50-60, and ± 2.5% selectivity is brought up to about 15dB.And Insertion Loss is less than 5.4dBm, is enhanced about more than once than the index of the employing lc circuit mode of prior art.
Therefore to select device be a kind ofly to have low-noise factor in HF wave band (2-30MHz) work in cavity prognosis of the present utility model, and inband flatness is good, and device is selected in the shortwave prognosis of high OIP3, high selectivity.
Second kind of execution mode of device selected in prognosis as the utility model cavity, as shown in Figure 2, the cavity prognosis selects the digital control part of device to comprise: digital control circuit 100, switching diode drive circuit 200, resonant cavity 400, resonant cavity 400 includes two resonators, be respectively first resonator 420 and second resonator 440, in the middle of first resonator 420 and second resonator 440, be connected with coupler 430, the carrier signal that receives is through first resonator, 420 resonant selecting frequencies, regulate coupling through coupler 430 again, the useful signal after the coupling enters second resonator 440 again and carries out resonance coupling output.
Preferably, the cavity prognosis selects device to include first impedance matching box 410 and second impedance matching box 450, the carrier signal that receives is successively through first impedance matching box 410 and 420 frequency-selectings of first resonator and export useful signal, this useful signal is coupled through coupler 430, regulate the degree of coupling between the resonator, the useful signal after the coupling enters second resonator 440 more successively and second impedance matching box 450 carries out frequency-selecting output.
Preferably, resonant cavity 400 is the square cavity structure of sealing.Switching diode drive circuit 200 is a high-voltage drive, and this high-voltage drive is taken all factors into consideration and selected the big and fast CMOS triode of frequency hopping of current/voltage for use according to the CMOS triode that the filtering demand adopts withstand voltage anti-stream parameter and frequency hopping speed parameter to be complementary.
Preferably, resonant cavity 400 is the quarter-wave capacitive load formula resonant cavity 400 that quarter-wave terminal short circuit coaxial transmission line and switching diode capacitor array are formed by length.
Preferably, be provided with memory in the control circuit, this memory stores has the data of each resonant frequency point.
Preferably, the first switching diode capacitor array and second switch diode capacitance array comprise ten one road capacitor arrays.
Preferably, digital control circuit 100 includes the TTL circuit, and digital control circuit 100 is controlled the break-make of the first switching diode drive circuit and second switch diode drive circuit by the Transistor-Transistor Logic level of exporting each resonance point.
Preferably, the cavity prognosis selects carrier signal wave band that device receives within 2 to 30MHZ scope.The utility model is a kind ofly to have low-noise factor in HF wave band (2-30MHz) work, and inband flatness is good, and device is selected in the shortwave prognosis of high OIP3, high selectivity.
Cavity prognosis of the present utility model selects the resonant cavity 400 of device to adopt double tunning, the resonant cavity 400 body formula structures of quarter-wave capacitive load formula, when the capacitance network resonance in switching diode and the capacitor array, near the little filter of rejection ratio LC of the unwanted signal the requirement frequency is improved a lot.The off-center frequency ± 2.5% selectivity 〉=15dBc, resonant cavity 400 fluid filters insert loss less than 5.4dBm, and IP3 is better than 40dBm in the band, is with outer IP3 to be better than 45dBm.Input power reaches 2W in the band, be with outer input power to reach 10W, and the machine sensitivity of emittor/receiver is improved a lot and and improvement.
As shown in Figure 3, behind the digital control circuit 100 in receiver/transmitter sends instructions to the preselector module, the preselector module at the 0.5mS interior resonance in the centre frequency identical (the base band centre frequency that promptly has useful signal) with receiver/transmitter, as we can see from the figure, useful signal when resonance when off-center frequency ± 1.5KHz fluctuation range between 0.5dBm, passband fluctuation is little, at off-center frequency ± 2.5% selectivity 〉=15dB, far-end suppresses to be better than 75dB in departing from.This explanation preselector module is very big near the decay of the unwanted signal the useful signal (local interference signal), and near unwanted signal (local interference signal) is suppressed very strong, can effectively strengthen the antijamming capability in radio station.Machine performance is had greatly improved and improves.
Above disclosed only is a kind of preferred embodiment of the utility model, can not limit the interest field of the utility model certainly with this, and therefore the equivalent variations of being done according to the utility model claim still belongs to the scope that the utility model is contained.
Claims (9)
1. device is selected in a cavity prognosis, it is arranged in the Receiver And Transmitter, be provided with control unit in this Receiver And Transmitter, it is characterized in that, this cavity prognosis selects device to comprise: digital control circuit, switching diode drive circuit, resonant cavity, described resonant cavity comprise the resonator that become with the resonance inductive bank by the switching diode capacitor array;
Described control unit sends the eight-digit binary number sign indicating number to described digital control circuit, this eight-digit binary number sign indicating number comprises eight bit address sign indicating numbers and eight bit data sign indicating number, whether digital control circuit receives eight bit address sign indicating number judging prognosis and selects device to work, as work then control according to the eight-digit binary number data sign indicating number that is received as described in the switching diode drive circuit, by the break-make of switching diode in the described switching diode drive circuit control switch diode capacitance array; Thereby one or more capacitor array in the selector switch diode capacitance array and described resonant inductance produce resonance, described resonant cavity selects to transmit the useful signal of characteristic frequency point in received carrier signal, suppress unwanted signal, described characteristic frequency point is meant the resonance frequency that selected capacitor array and resonant inductance produce.
2. device is selected in cavity prognosis as claimed in claim 1, it is characterized in that, described resonant cavity is the square cavity structure of sealing.
3. device is selected in cavity prognosis as claimed in claim 2, it is characterized in that, described resonant cavity includes two resonators, be respectively first resonator and second resonator, and in the middle of first resonator and second resonator, be connected with coupler, dual tuner is regulated coupling by the coupler of centre, the degree of coupling of control double tuned circuit.
4. device is selected in cavity prognosis as claimed in claim 3, it is characterized in that, described resonant cavity also includes first impedance matching box and second impedance matching box, the carrier signal that receives is successively through first impedance matching box and first resonator output useful signal, this useful signal is coupled through described coupler, and the useful signal after the coupling enters second resonator more successively and second impedance matching box carries out frequency-selecting output.
5. device is selected in cavity prognosis as claimed in claim 2, it is characterized in that, described resonant cavity is the quarter-wave capacitive load formula resonant cavity that quarter-wave terminal short circuit coaxial transmission line and switching diode capacitor array are formed by length.
6. device is selected in cavity prognosis as claimed in claim 4, it is characterized in that, is provided with memory in the described control circuit, and this memory stores has the data of each resonant frequency point.
7. device is selected in cavity prognosis as claimed in claim 4, it is characterized in that, described switching diode capacitor array comprises ten one road capacitor arrays.
8. device is selected in cavity prognosis as claimed in claim 4, it is characterized in that, described digital control circuit includes the TTL circuit, and described digital control circuit is by the break-make of the Transistor-Transistor Logic level control switch diode drive circuit of each resonance point of output.
9. device is selected in cavity prognosis as claimed in claim 4, it is characterized in that, described cavity prognosis selects carrier signal wave band that device receives within 2 to 30MHZ scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201331920U CN201663596U (en) | 2010-03-12 | 2010-03-12 | Cavity pre/post-selector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201331920U CN201663596U (en) | 2010-03-12 | 2010-03-12 | Cavity pre/post-selector |
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| Publication Number | Publication Date |
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| CN201663596U true CN201663596U (en) | 2010-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010201331920U Expired - Fee Related CN201663596U (en) | 2010-03-12 | 2010-03-12 | Cavity pre/post-selector |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104253628A (en) * | 2014-09-10 | 2014-12-31 | 宝鸡烽火诺信科技有限公司 | Short-wave pre-and-post-selector |
| CN108351619A (en) * | 2015-11-09 | 2018-07-31 | 奥的斯电梯公司 | self-diagnostic circuit |
| CN110572180A (en) * | 2019-07-31 | 2019-12-13 | 北京遥测技术研究所 | Anti-interference data chain system of unmanned aerial vehicle |
| CN111884614A (en) * | 2020-08-24 | 2020-11-03 | 武汉博畅通信设备有限责任公司 | 108-plus 270MHz frequency hopping filter |
-
2010
- 2010-03-12 CN CN2010201331920U patent/CN201663596U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104253628A (en) * | 2014-09-10 | 2014-12-31 | 宝鸡烽火诺信科技有限公司 | Short-wave pre-and-post-selector |
| CN104253628B (en) * | 2014-09-10 | 2016-05-25 | 宝鸡烽火诺信科技有限公司 | Device is selected in a kind of shortwave prognosis |
| CN108351619A (en) * | 2015-11-09 | 2018-07-31 | 奥的斯电梯公司 | self-diagnostic circuit |
| CN110572180A (en) * | 2019-07-31 | 2019-12-13 | 北京遥测技术研究所 | Anti-interference data chain system of unmanned aerial vehicle |
| CN111884614A (en) * | 2020-08-24 | 2020-11-03 | 武汉博畅通信设备有限责任公司 | 108-plus 270MHz frequency hopping filter |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: GUANGDONG SHENGDA ELECTRONIC CO., LTD. Free format text: FORMER OWNER: GUANGZHOU SHENGDA ELECTRONIC CO., LTD. Effective date: 20130724 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 510430 GUANGZHOU, GUANGDONG PROVINCE TO: 528308 FOSHAN, GUANGDONG PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20130724 Address after: 528308 Guangdong Province, Foshan city Shunde District Lunjiao Lunjiao Street Office of the new industrial zone of Xi four northbound Santa Industrial Park Administration building five floor Patentee after: Guangdong Shengda Electronic Co., Ltd. Address before: Shijing Town, Baiyun District of Guangzhou City, Guangdong province 510430 Qingfeng third industrial zone 7 Patentee before: Guangzhou Shengda Electronic Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101201 Termination date: 20140312 |