CN202798694U - Short wave rear selector - Google Patents
Short wave rear selector Download PDFInfo
- Publication number
- CN202798694U CN202798694U CN 201220402617 CN201220402617U CN202798694U CN 202798694 U CN202798694 U CN 202798694U CN 201220402617 CN201220402617 CN 201220402617 CN 201220402617 U CN201220402617 U CN 201220402617U CN 202798694 U CN202798694 U CN 202798694U
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- frequency filter
- electronic switch
- output
- short wave
- bounce
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Abstract
A short wave rear selector is arranged inside a transmitter which is provided with a control device for controlling work of the short wave rear selector. The short wave rear selector comprises a control circuit for receiving control signals transmitted by the control device, an output end of the control circuit is connected with a first electronic switch, a first frequency hopping filter, a decoder, a second electronic switch and a second frequency hopping filter, the first electronic switch is connected with a radio frequency input end, output signals are connected with the first frequency hopping filter, an output end of the first frequency hopping filter is connected with the second frequency hopping filter through a plurality of parallel couplers, an output end of the decoder is respectively connected with the first frequency hopping filter and the second frequency hopping filter after being switched by a relay, an output end of the second frequency hopping filter is connected with a low noise amplifier through the second electronic switch, the output of the low noise amplifier is a radio frequency output, and a coupler is also connected between the first electronic switch and the second electronic switch. The rear selector is simple in control, rapid in frequency hopping speed, low in power dissipation and small in bottom noises.
Description
Technical field
The utility model belongs to digital tuning frequency hopping field, relates to a kind of short wave candidate device.
Background technology
Along with the development of frequency hopping, short wave candidate device is widely used in military affairs, the commercial signal communication system, and it presents the coupling transmission to frequency in the passband, and frequency mismatch in the stopband is carried out reflection loss, thereby realizes the signal spectrum filtering function.Short wave candidate device is generally operational in transmitter power amplifier front end, and Main Function is that channel noise is sent out in filtering, improves the transmitter Electromagnetic Compatibility.Existing short wave candidate device has adopted single-chip microcomputer as control circuit mostly, and the control mode of single-chip microcomputer is comparatively complicated, and the data transaction output speed is slower, has affected the frequency hopping speed of short wave candidate device, is unfavorable for the digitized processing of communication equipment; In addition, because single-chip microcomputer in use will use crystal resonator, in the short wave candidate device passband, introduce noise easily, affect communication quality.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of short wave candidate device, and the advantages such as control is simple, frequency hopping speed is fast, low in energy consumption, the bottom noise is little are arranged.
To achieve these goals, the technical solution adopted in the utility model is:
A kind of short wave candidate device, operating frequency is 2MHz～30MHz, be arranged in the transmitter, this transmitter has the control device of control short wave candidate device work, select device to comprise the control circuit that receives described control device transfer control signal after being somebody's turn to do, the output of described control circuit connects the first electronic switch, the first bounce frequency filter, decoder, the second electronic switch and the second bounce frequency filter, the first electronic switch connects the radio frequency input, its output signal connects the first bounce frequency filter, the output of the first bounce frequency filter is linked into the second bounce frequency filter by parallel a plurality of couplers, the output of decoder is connected to respectively the first bounce frequency filter and the second bounce frequency filter behind relay switch, the output of the second bounce frequency filter is connected to low noise amplifier through the second electronic switch, the output of low noise amplifier is radio frequency output, wherein also is connected with coupler between the first electronic switch and the second electronic switch.
The output of described the first bounce frequency filter connects parallel a plurality of couplers, wherein any or a plurality of coupler are in series with equalizer, the output of equalizer is linked into the second bounce frequency filter, and the output of the coupler of series equalizer is not linked into the second bounce frequency filter yet.
Described control circuit is shift register, the control command that its receiving control device sends with serial communication mode, and convert thereof into parallel tuning code to control the work of the first electronic switch, the first bounce frequency filter, decoder, the second electronic switch and the second bounce frequency filter.Specifically refer to, the 3 Bits Serial code instructions that control circuit will receive convert the tuning code of 10 parallel-by-bits to, wherein 8 parallel-by-bit codes are controlled the first bounce frequency filter and the second bounce frequency filter work, and 2 parallel-by-bit codes are controlled the waveband selection of the first bounce frequency filter and the second bounce frequency filter and the working power of each frequency range.
Described the first bounce frequency filter is identical with the second bounce frequency filter structure, all formed by digital circuit and analog circuit, after being used for receiving, digital circuit selects the output signal of device control circuit, specifically finger is received 8 above-mentioned parallel-by-bit codes, calculate the resonant network parameter, analog circuit is exported the useful signal of characteristic frequency point, and unwanted signal is suppressed for generation of resonance frequency.
Described the first electronic switch is identical with the second electronic switch structure, is used for the selection of radio-frequency channel, controls respectively radio-frequency channel and the input of short wave candidate device radio frequency and the straight-through function of exporting of corresponding each frequency range of bounce frequency filter.
Described decoder and relay are used for electrical source exchange, control respectively the working power of each frequency range of bounce frequency filter.
Described equalizer is used for improving the gain flatness of short wave candidate device in full frequency band.
After the filtering of described low noise amplifier through the two-stage bounce frequency filter, radio frequency is amplified; Have large dynamically, high-gain, low noise characteristics;
Equalizer is used for improving the gain flatness of short wave candidate device in full frequency band;
The utility model short wave candidate device also can comprise a housing, is used for device short wave candidate device cell board, thereby so that the utility model short wave candidate device has good ground connection and heat conductivility, and can reduce the electromagnetic interference between the internal electronic element.
The utility model is compared with existing technologies, and control circuit adopts shift register, has optimized control mode, has improved the frequency hopping speed of short wave candidate device; Adopt low noise amplifier, improved the output amplitude of short wave candidate device; Adopt equalizer, improved the gain flatness of short wave candidate device in full frequency band; Adopt decoder and relay to control respectively the working power of each wave band of short wave candidate device, reduced the power consumption of short wave candidate device, reduced the interference between each frequency range.
Description of drawings
Accompanying drawing is the utility model system block diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
With reference to accompanying drawing, the utility model provides a kind of 2MHz～30MHz short wave candidate device, be arranged in the transmitter of the control device with the work of control short wave candidate device, formed by control circuit, the first bounce frequency filter, the second bounce frequency filter, the first electronic switch, the second electronic switch, decoder, relay, low noise amplifier, equalizer, housing etc.Short wave candidate device divides three frequency ranges to realize: 2MHz～3.999MHz, 4MHz～9.999MHz, 10MHz～30MHz.Control circuit is shift register, after receiving the Serial Control order of control device, convert 3 Bits Serial codes to 10 parallel-by-bit code A0～A9, control code in A0～A7 section of being wherein, control the first bounce frequency filter and the second bounce frequency filter work, after the first bounce frequency filter and the second bounce frequency filter received instruction, its inner digital circuit was calculated the resonant network parameter; A8, the outer control code of the A9 section of being are controlled the first electronic switch, the second electronic switch, decoder and relay work.The radio frequency path of the first electronic switch and the required frequency range of the second electronic switch gating, decoder and relay provide working power for required frequency range.As A8, when A9 is all low level, electronic switch gating 2MHz～3.999MHz work, decoder and relay provide power supply for 2MHz～3.999MHz; When A8 is low level, when A9 is high level, electronic switch gating 4MHz～9.999MHz work, decoder and relay provide power supply for 4MHz～9.999MHz; When A8 is high level, when A9 is low level, electronic switch gating 10MHz～30MHz work, decoder and relay provide power supply for 10MHz～30MHz; As A8, when A9 is all high level, the radio frequency input is straight-through with output.
During the work of the utility model short wave candidate device, A8, A9 select frequency range, A0～A7 selects operating frequency, radiofrequency signal is sent to frequency range corresponding to bounce frequency filter by a road of electronic switch gating, arrive frequency range corresponding to second level bounce frequency filter through coupler, arrive again another electronic switch, then amplify output through amplifier.Wherein, between the first order bounce frequency filter of short wave candidate device 10MHz～30MHz section and second level bounce frequency filter, add equalizer, to adjust the gain flatness of this frequency range.
With reference to accompanying drawing, the utility model comprises digital control circuit part and artificial circuit part.Control circuit adopts shift register 74HC164D.Shift register is a kind of data converting of 8 Bits Serial input parallel output, and its conversion speed is the ns magnitude, can greatly improve short wave candidate device frequency hopping speed.Artificial circuit part is comprised of bounce frequency filter resonant circuit and low noise amplifier circuit, is mainly used in the selective resonance frequency and amplifies radiofrequency signal, and useful frequency signal is amplified output, and the unwanted signal composition is suppressed.
With reference to accompanying drawing, the utility model adopts the cascade of two-stage bounce frequency filter to use, and improves the selecting frequency characteristic of short wave candidate device with this.Be provided with the impedance matching that coupler is used for improving port of wave filter in the middle of the two-stage bounce frequency filter, output adds low noise amplifier and is used for compensating the insertion loss that the two-stage bounce frequency filter is introduced, and improves the output amplitude of short wave candidate device.
With reference to accompanying drawing, the bounce frequency filter that the utility model adopts divides 3 sections to realize 2MHz～30MHz, be divided into three sections of 2MHz～3.999MHz, 4MHz～9.999MHz, 10MHz～30MHz, gain is comparatively smooth among two sections of 2MHz～3.999MHz and the 4MHz～9.999MHz in short wave candidate device, but 10MHz～30MHz section, because frequency span is larger, the low side gain is high, and high-end gain is low, and both differ about 5dB.Therefore, added equalizer in 10MHz～30MHz frequency range, equalizer can reduce the low side gain about 5dB, and only reduces about 0.5dB with high-end, to improve whole section gain flatness, make short wave candidate device output amplitude in 2MHz～30MHz basically identical.
The utility model adopts casing device short wave candidate device cell board.Housing is the metal heat-conducting material, has good ground connection and heat conductivility, and can reduce the electromagnetic interference between the internal electronic element.
Short wave candidate device of the present utility model is through test and use, and frequency hopping speed is fast, and is low in energy consumption, and noise is little, and frequency selectivity is good, and working stability is reliable, the Electromagnetic Compatibility of energy Effective Raise transmitter.
Claims (6)
1. short wave candidate device, operating frequency is 2MHz～30MHz, be arranged in the transmitter, this transmitter has the control device of control short wave candidate device work, it is characterized in that, select device to comprise the control circuit that receives described control device transfer control signal after being somebody's turn to do, the output of described control circuit connects the first electronic switch, the first bounce frequency filter, decoder, the second electronic switch and the second bounce frequency filter, the first electronic switch connects the radio frequency input, its output signal connects the first bounce frequency filter, the output of the first bounce frequency filter is linked into the second bounce frequency filter by parallel a plurality of couplers, the output of decoder is connected to respectively the first bounce frequency filter and the second bounce frequency filter behind relay switch, the output of the second bounce frequency filter is connected to low noise amplifier through the second electronic switch, the output of low noise amplifier is radio frequency output, wherein also is connected with coupler between the first electronic switch and the second electronic switch.
2. described short wave candidate device according to claim 1, it is characterized in that, the output of described the first bounce frequency filter connects parallel a plurality of couplers, wherein any or a plurality of coupler are in series with equalizer, the output of equalizer is linked into the second bounce frequency filter, and the output of the coupler of series equalizer is not linked into the second bounce frequency filter yet.
3. described short wave candidate device according to claim 1, it is characterized in that, described control circuit is shift register, the control command that its receiving control device sends with serial communication mode, and convert thereof into parallel tuning code to control the work of the first electronic switch, the first bounce frequency filter, decoder, the second electronic switch and the second bounce frequency filter.
4. described short wave candidate device according to claim 1, it is characterized in that, described the first bounce frequency filter is identical with the second bounce frequency filter structure, all formed by digital circuit and analog circuit, select the output signal of device control circuit after digital circuit is used for receiving, calculate the resonant network parameter, analog circuit is for generation of resonance frequency, the useful signal of characteristic frequency point is exported, and unwanted signal is suppressed.
5. described short wave candidate device according to claim 1, it is characterized in that, described the first electronic switch is identical with the second electronic switch structure, be used for the selection of radio-frequency channel, control respectively radio-frequency channel and the input of short wave candidate device radio frequency and the straight-through function of exporting of corresponding each frequency range of bounce frequency filter.
6. described short wave candidate device according to claim 1 is characterized in that, described decoder and relay are used for electrical source exchange, controls respectively the working power of each frequency range of bounce frequency filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220402617 CN202798694U (en) | 2012-08-15 | 2012-08-15 | Short wave rear selector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220402617 CN202798694U (en) | 2012-08-15 | 2012-08-15 | Short wave rear selector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202798694U true CN202798694U (en) | 2013-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220402617 Expired - Fee Related CN202798694U (en) | 2012-08-15 | 2012-08-15 | Short wave rear selector |
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| CN (1) | CN202798694U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106330321A (en) * | 2015-06-24 | 2017-01-11 | 深圳市中兴微电子技术有限公司 | Strong filter canceling method and device |
| CN106506039A (en) * | 2016-12-13 | 2017-03-15 | 宝鸡烽火诺信科技有限公司 | Device control system is selected in a kind of shortwave prognosis |
| CN110601712A (en) * | 2019-09-12 | 2019-12-20 | 陕西烽火诺信科技有限公司 | Control system of short-wave pre-post selector |
| CN111865263A (en) * | 2020-07-15 | 2020-10-30 | 武汉博畅通信设备有限责任公司 | Double-circuit numerical control frequency hopping trapper |
| CN111953377A (en) * | 2020-08-20 | 2020-11-17 | 南京熊猫汉达科技有限公司 | Control system for built-in pre-post selector of no-load short-wave radio station |
| CN112019236A (en) * | 2020-08-12 | 2020-12-01 | 武汉博畅通信设备有限责任公司 | Short wave after-selector |
-
2012
- 2012-08-15 CN CN 201220402617 patent/CN202798694U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106330321A (en) * | 2015-06-24 | 2017-01-11 | 深圳市中兴微电子技术有限公司 | Strong filter canceling method and device |
| CN106330321B (en) * | 2015-06-24 | 2019-02-05 | 深圳市中兴微电子技术有限公司 | A kind of filtering counteracting method and device by force |
| CN106506039A (en) * | 2016-12-13 | 2017-03-15 | 宝鸡烽火诺信科技有限公司 | Device control system is selected in a kind of shortwave prognosis |
| CN106506039B (en) * | 2016-12-13 | 2019-05-03 | 宝鸡烽火诺信科技有限公司 | Device control system is selected in a kind of shortwave prognosis |
| CN110601712A (en) * | 2019-09-12 | 2019-12-20 | 陕西烽火诺信科技有限公司 | Control system of short-wave pre-post selector |
| CN111865263A (en) * | 2020-07-15 | 2020-10-30 | 武汉博畅通信设备有限责任公司 | Double-circuit numerical control frequency hopping trapper |
| CN111865263B (en) * | 2020-07-15 | 2023-06-27 | 武汉博畅通信设备有限责任公司 | Double-circuit numerical control frequency hopping trapper |
| CN112019236A (en) * | 2020-08-12 | 2020-12-01 | 武汉博畅通信设备有限责任公司 | Short wave after-selector |
| CN111953377A (en) * | 2020-08-20 | 2020-11-17 | 南京熊猫汉达科技有限公司 | Control system for built-in pre-post selector of no-load short-wave radio station |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20180815 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |