CN203643599U - Secondary radar high- and intermediate-frequency digital receiver - Google Patents
Secondary radar high- and intermediate-frequency digital receiver Download PDFInfo
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- CN203643599U CN203643599U CN201320860968.2U CN201320860968U CN203643599U CN 203643599 U CN203643599 U CN 203643599U CN 201320860968 U CN201320860968 U CN 201320860968U CN 203643599 U CN203643599 U CN 203643599U
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- 238000006243 chemical reaction Methods 0.000 claims description 7
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- 230000003750 conditioning effect Effects 0.000 abstract 2
- 238000005070 sampling Methods 0.000 abstract 2
- 238000000034 method Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
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Abstract
The utility model provides a secondary radar high- and intermediate-frequency digital receiver. The secondary radar high- and intermediate-frequency digital receiver comprises an analog signal conditioning circuit and a digital circuit which are connected in order; the analog signal conditioning circuit comprises a radio-frequency amplification circuit, a radio-frequency filter circuit, a frequency-mixing circuit, an intermediate-frequency amplification circuit and an intermediate-frequency filter circuit which are connected in order; the digital circuit comprises an A/D sampling circuit; and the intermediate-frequency filter circuit is connected with the A/D sampling circuit. A common analog channel is maximized through adoption of the high- and intermediate-frequency digitized receiver, multi-channel receiving and the frequency selection are realized through digital processing, simplification of analog channel design and number reduction of analog devices are realized, the size and the weight of the receiver are reduced, and the integrated level and real-time performance of the receiver are increased.
Description
Technical field
The utility model relates to the high intermediate frequency digital receiver of a kind of secondary radar, particularly relates to a kind of high intermediate frequency digital receiver of secondary radar being applicable in wireless communication.
Background technology
Along with the development of wireless communication and Radar Technology, system requirements receives function miniaturization, lightweight and integrated, and has higher real-time.And traditional analog receiver is more because of simulation discrete device, split tunnel is also more, and receiver is difficult to accomplish miniaturization, lightweight and integrated.
Traditional secondary radar receiver is many is mixed down arrowband Low Medium Frequency simulating signal by reception signal, then delivers to back-end processing.This processing mode is narrower because of Low Medium Frequency signal bandwidth, cannot carry out the processing of multidiameter delay passage, and the real-time of receiver is poor; Simultaneously, this quasi-tradition receiver cannot maximize shared receiving cable, more simulation split tunnel can increase the use of analog device, the complex die analog signal debugging link forming can bring more labile factor to the functional parameter of receiver, structural volume also can increase a lot, makes receiver weightening finish, volume is large and integrated level is lower.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of high intermediate frequency digital receiver of secondary radar that increases intermediate-freuqncy signal bandwidth.
The technical matters that the utility model further will solve is to provide a kind of secondary radar digital receiver that maximizes common analog passage.
The technical solution adopted in the utility model is as follows: the high intermediate frequency digital receiver of a kind of secondary radar, is characterized in that: comprise analog signal conditioner circuit and digital circuit successively; Described analog signal conditioner circuit comprises connected successively radio frequency amplifying circuit, rf filtering circuit, mixting circuit, intermediate frequency amplifier circuit and intermediate frequency filtering circuit; Described digital circuit comprises A/D sample circuit; Described intermediate frequency filtering circuit is connected with A/D sample circuit.
As preferably, described mixting circuit is 300MHz mixting circuit.
As preferably, described A/D sample circuit comprises connected line transformer and A/D modulus conversion chip, and described line transformer is connected with intermediate frequency filtering circuit.
As preferably, described digital circuit also comprises the signal processing circuit being connected with A/D modulus conversion chip.
As preferably, described signal processing circuit is a fpga chip.
Compared with prior art, the beneficial effects of the utility model are:
1, send into again back-end processing after the IF-FRE of traditional receiver is brought up to 300MHz below by common 100MHz, increase intermediate-freuqncy signal bandwidth, realize parallel the passing through of multiple signals on passage, increase the real-time of receiver.
2, this receiver adopts channelizing treatment technology, realize the processing that multi-channel parallel receives signal, the function items such as frequency-selecting are put into digital processing part to greatest extent, simplify quantity and the function of analog channel, maximize common analog receiving cable, make receiver miniaturization more, lightweight and integrated.
Accompanying drawing explanation
Fig. 1 is the wherein analog signal conditioner circuit theory schematic diagram of an embodiment of the utility model.
Fig. 2 is the principle schematic of middle digital circuit embodiment illustrated in fig. 1.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Disclosed arbitrary feature in this instructions (comprising any accessory claim, summary and accompanying drawing), unless narration especially all can be replaced by other equivalences or the alternative features with similar object.,, unless narration especially, each feature is an example in a series of equivalences or similar characteristics.
The high intermediate frequency digital receiver of a kind of secondary radar, comprises analog signal conditioner circuit 1 and digital circuit successively; Described analog signal conditioner circuit 1 comprises connected successively radio frequency amplifying circuit 11, rf filtering circuit 12, mixting circuit 13, intermediate frequency amplifier circuit 14 and intermediate frequency filtering circuit 15; Described digital circuit comprises A/D sample circuit 21; Described intermediate frequency filtering circuit 15 is connected with A/D sample circuit 21.
Described mixting circuit 13 is 300MHz mixting circuit.
By antenna reception to weak radiofrequency signal after radio frequency amplifying circuit 11 amplifies, carry out filtering via a rf filtering circuit 12 again, then obtain the high intermediate-freuqncy signal of simulation of 300MHz via mixting circuit 13 mixing with local oscillation signal, and again pass through the amplification of intermediate frequency amplifier circuit 14, after the filtering of intermediate frequency filtering circuit 15, output to rear class digital circuit processing section.
Described A/D sample circuit 21 comprises connected line transformer and A/D modulus conversion chip, and described line transformer is connected with intermediate frequency filtering circuit 15, and the voltage of the high intermediate-freuqncy signal of simulation to input regulates and exports.The analog if signal of input is converted to digital high intermediate-freuqncy signal by described A/D modulus conversion chip.
Described digital circuit also comprises the signal processing circuit 22 being connected with A/D modulus conversion chip.
Described signal processing circuit 22 is a fpga chip, and the digital signal of input is classified, selected and processes, and then exports required digital receiver processing signals.In this specific embodiment, the function that digital signal is classified, selected and processes of having utilized fpga chip itself to have, the method of classification, selection and the processing to digital signal is not improved, and the software handling procedure adopting is existing program.
Claims (5)
1. the high intermediate frequency digital receiver of secondary radar, is characterized in that: comprise analog signal conditioner circuit and digital circuit successively; Described analog signal conditioner circuit comprises connected successively radio frequency amplifying circuit, rf filtering circuit, mixting circuit, intermediate frequency amplifier circuit and intermediate frequency filtering circuit; Described digital circuit comprises A/D sample circuit; Described intermediate frequency filtering circuit is connected with A/D sample circuit.
2. high intermediate frequency digital receiver according to claim 1, is characterized in that: described mixting circuit is 300MHz mixting circuit.
3. high intermediate frequency digital receiver according to claim 1, is characterized in that: described A/D sample circuit comprises connected line transformer and A/D modulus conversion chip, and described line transformer is connected with intermediate frequency filtering circuit.
4. high intermediate frequency digital receiver according to claim 3, is characterized in that: described digital circuit also comprises the signal processing circuit being connected with A/D modulus conversion chip.
5. high intermediate frequency digital receiver according to claim 4, is characterized in that: described signal processing circuit is a fpga chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320860968.2U CN203643599U (en) | 2013-12-25 | 2013-12-25 | Secondary radar high- and intermediate-frequency digital receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320860968.2U CN203643599U (en) | 2013-12-25 | 2013-12-25 | Secondary radar high- and intermediate-frequency digital receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203643599U true CN203643599U (en) | 2014-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320860968.2U Expired - Lifetime CN203643599U (en) | 2013-12-25 | 2013-12-25 | Secondary radar high- and intermediate-frequency digital receiver |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105988096A (en) * | 2015-02-12 | 2016-10-05 | 上海联影医疗科技有限公司 | Radio frequency receiving unit and magnetic resonance imaging equipment comprising same |
| CN106199526A (en) * | 2016-06-27 | 2016-12-07 | 芜湖航飞科技股份有限公司 | A kind of secondary radar receiver noise trap |
| CN106199531A (en) * | 2016-06-27 | 2016-12-07 | 芜湖航飞科技股份有限公司 | A kind of airway traffic control radar secondary radar data control system |
-
2013
- 2013-12-25 CN CN201320860968.2U patent/CN203643599U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105988096A (en) * | 2015-02-12 | 2016-10-05 | 上海联影医疗科技有限公司 | Radio frequency receiving unit and magnetic resonance imaging equipment comprising same |
| CN106199526A (en) * | 2016-06-27 | 2016-12-07 | 芜湖航飞科技股份有限公司 | A kind of secondary radar receiver noise trap |
| CN106199531A (en) * | 2016-06-27 | 2016-12-07 | 芜湖航飞科技股份有限公司 | A kind of airway traffic control radar secondary radar data control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140611 |