CN205450261U - Calibration source device based on high frequency over --horizon radar - Google Patents
Calibration source device based on high frequency over --horizon radar Download PDFInfo
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- CN205450261U CN205450261U CN201620278402.2U CN201620278402U CN205450261U CN 205450261 U CN205450261 U CN 205450261U CN 201620278402 U CN201620278402 U CN 201620278402U CN 205450261 U CN205450261 U CN 205450261U
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Abstract
The utility model discloses a calibration source device based on high frequency over - -horizon radar, including power supply circuit, GPS circuit, receiving circuit, transmitting circuit and FPGA circuit: power supply circuit includes solar energy receiving module and electric power storage module, the GPS circuit is including constant temperature crystal oscillator, GPS signal reception module and synchronization module, receiving circuit is including the receiving antenna, transmitter -receiver isolation switch, wave filter and the AD converter that connect gradually, the transmitting circuit is including the DA converter, wave filter, transmitter -receiver isolation switch, power module and the emit antenna that connect gradually, the FPGA circuit is connected with GPS circuit, AD converter, DA converter, transmitter -receiver isolation switch and power module respectively. The utility model discloses can analyze radar transmission signal automatically to producing according to radar work agreement and corresponding the calibrating signal, have that the circuit is simple, the low power dissipation, stability is high, with low costs and be suitable for field work's advantage, specially adapted high frequency over -the -horizon radar calibrates.
Description
Technical field
This utility model relates to a kind of calibration source device based on high frequency over the horizon radar, belongs to high frequency over the horizon radar technical field.
Background technology
High frequency over the horizon radar has been widely used for the kinetic parameter detections such as sea surface wind, wave and stream and can be used for Sea Surface Ship and low-speed operations target acquisition simultaneously.There is amplitude phase error in radar receiving array, can affect the detection performance of radar.Conventional calibration steps is divided into passive calibration and has source calibration, active calibration steps needs to place calibration source in far field, realize radar receiving array by some active calibration steps to calibrate, such as Chinese invention patent " a kind of based on the array amplitude phase error calibration steps of direct-wave jamming between station " (patent No.: CN201110439090.0).Existing calibrator (-ter) unit structure is complicated, and power consumption is higher, and uses external power source electric power-feeding structure and can not resolve radar emission signal more, it is impossible to meet the job requirement that the unregulated power supplies such as isolated island are local.
Utility model content
For the problems referred to above, the purpose of this utility model is to provide a kind of calibration source device based on high frequency over the horizon radar.
For achieving the above object, this utility model takes techniques below scheme:
A kind of calibration source device based on high frequency over the horizon radar, including power circuit, GPS circuitry, reception circuit, radiating circuit and FPGA circuitry；Power circuit includes solar energy receiver module and electric energy memory module；GPS circuitry includes constant-temperature crystal oscillator, gps signal receiver module and synchronization module；Radiating circuit includes D/A converter, wave filter, transceiver insulation switch, power model and the transmitting antenna being sequentially connected with；Receive reception antenna, transceiver insulation switch, wave filter and A/D converter that circuit includes being sequentially connected with；FPGA circuitry is connected with GPS circuitry, A/D converter, D/A converter, transceiver insulation switch and power model respectively；GPS circuitry (10) is connected with A/D converter (9), D/A converter (4) respectively.
Described GPS circuitry (10) produces the corresponding synchronizing signal consistent with radar work schedule, it is ensured that calibration source device and radar synchronize, and emitted circuit (5) produces correspondence calibration signal and launches under this sequential；Being received gps signal by gps signal receiver module, constant-temperature crystal oscillator provides high stability, low jitter and the system work clock of low phase noise；Tame clock signal by GPS and it divides the 1PPS signal obtained；Produced radar Synchronization Control sequential by synchronization module afterwards, make calibration source device Tong Bu with radar work.
Described radiating circuit produces calibration signal under the synchronizing signal that GPS produces controls, and is amplified and power control through power model, and last emitted antenna is launched.
Described reception circuit receives radar emission signal, and after digitized, the local oscillation signal with the different center frequency in radar bandwidth of operation is mixed, available radar operating frequency.
Described power circuit can convert the solar into electric energy and store, and this device can be operated in the wild environment of unregulated power supply.
This utility model is owing to taking above technical scheme, it has the advantage that and can automatically resolve radar emission signal, and produce corresponding calibration signal, have that circuit is simple, low in energy consumption, stability is high, a low cost and be suitable to the advantage of field work, be particularly well-suited to high frequency over the horizon radar calibration.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model；
Wherein, 1 power model, 2 transceiver insulation switches one, 3 wave filter, 4 D/A converters, 5 radiating circuits, 6 FPGA circuitry, 7 transceiver insulation switches two, 8 wave filter, 9 A/D converters, 10 GPS circuitry, 11 receive circuit, 12 power circuits.
Detailed description of the invention
It is described in detail of the present utility model with embodiment below in conjunction with the accompanying drawings.
It is constant that the present embodiment medium-high frequency over-the-horizon radar is operated in FMICW system, swept bandwidth and frequency sweep cycle, and radar operating frequency precision is 1KHz, and radar work schedule determines, the radar participating in work realizes synchronizing by GPS.
As it is shown in figure 1, this utility model includes power circuit (12), GPS circuitry (10), receives circuit (11), radiating circuit (5) and FPGA circuitry (6): power circuit (12) includes solar energy receiver module and electric energy memory module；GPS circuitry (10) includes constant-temperature crystal oscillator, gps signal receiver module and synchronization module；Radiating circuit (5) includes the D/A converter (4) being sequentially connected with, wave filter (3), transceiver insulation switch one (2), power model (1) and launches antenna；Receive reception antenna, transceiver insulation switch two (7), wave filter (8) and A/D converter (9) that circuit (11) includes being sequentially connected with；FPGA circuitry (6) is connected with GPS circuitry (10), A/D converter (9), D/A converter (4), transceiver insulation switch one (2), transceiver insulation switch two (7) and power model (1) respectively；GPS circuitry (10) is connected with A/D converter (9), D/A converter (4) respectively.
Described power circuit (12) can convert solar energy into electrical energy and store, and power circuit (12) is that whole device is powered, it is ensured that this calibrating installation is operated in the wild environment of unregulated power supply.
Described reception circuit (11) is received antenna and receives radar emission signal, accesses transceiver insulation switch two (7) afterwards, accesses A/D converter (9) after filtering and carry out sampling digitizing after device (8) filtering.Wherein transceiver insulation switch (7) isolation is more than 60dB, and when radar emission, transceiver insulation switch two (7) is opened, transceiver insulation switch two (7) Guan Bi when radar receives.The mid frequency of wave filter (8) is consistent with radar bandwidth of operation with bandwidth, as far as possible suppression radar bandwidth of operation external signal.A/D converter (9) is internally integrated signal gain circuit, it is possible to provide the gain control of-10dB ~ 40dB, it is ensured that calibrating installation is operated in optimum state.Reception circuit is based on " software radio " thought, and circuit structure is simple, low in energy consumption, highly sensitive, can meet real work demand.
Described FPGA circuitry (6) produces the local oscillation signal of the different center frequency in radar bandwidth of operation, and the digital signal after sampling with A/D is mixed, mixed signal accesses wave digital lowpass filter and is filtered, the band connection frequency of low pass filter is 100Hz, stopband cut-off frequency is 150Hz, adds up output signal energy.Therefore can get the power distribution receiving signal under local oscillation signals of different frequencies, it is determined by power maximum and can get radar operating frequency.FPGA circuitry can real time parsing radar emission signal, and relevant information is supplied to radiating circuit.
Described GPS circuitry (10) is received gps signal by gps signal receiver module, and constant-temperature crystal oscillator provides high stability, low jitter and the system work clock of low phase noise, and frequency is 10MHz.10MHz clock and its ten 1PPS signal that frequency obtains very much is tamed by GPS.Produced radar Synchronization Control sequential by synchronization module afterwards, make calibration source device Tong Bu with radar work.
Described radiating circuit (5) resolves, according to receiving circuit (11), the radar signal information generation calibration signal obtained, this calibration signal uses the method simulated target motion of the phase bias described in Chinese invention patent " a kind of method realizing the ground wave OTHR transmitting of multifrequency simultaneously/reception " (patent No.: ZL201410014040.1), the method can make calibration signal produce Doppler shift so that calibration signal separates with sea echo signal and target echo signal.The calibration signal produced accesses wave filter (3) and is filtered, and filtered signal accesses transceiver insulation switch one (2), is then passed through power model (1) amplification and power controls, launch signal finally by launching antenna.Wherein transceiver insulation switch one (2) isolation is more than 60dB, and transceiver insulation switch one (2) Guan Bi when radar emission, when radar receives, transceiver insulation switch one (2) is opened.The enable of power model (1) is consistent with transceiver insulation switch one (2), i.e. during one (2) closedown of transceiver insulation switch, power model (1) quits work, when transceiver insulation switch one (2) is opened, power model (1) work, so can reduce the power consumption of calibrating installation.The mid frequency of wave filter (3) is consistent with radar bandwidth of operation with bandwidth.
This utility model is owing to taking above technical scheme, can automatically resolve radar emission signal, and produce corresponding calibration signal, have that circuit is simple, low in energy consumption, stability is high, a low cost and be suitable to the advantage of field work, be particularly well-suited to high frequency over the horizon radar calibration.The method utilized in this utility model belongs to prior art, and this utility model is the innovation for hardware and protection.
Claims (4)
1. a calibration source device based on high frequency over the horizon radar, it is characterised in that: include power circuit (12), GPS circuitry (10), receive circuit (11), radiating circuit (5) and FPGA circuitry (6)；Described radiating circuit (5) includes the D/A converter (4) being sequentially connected with, wave filter (3), transceiver insulation switch one (2), power model (1) and launches antenna；Described reception circuit (11) includes reception antenna, transceiver insulation switch two (7), wave filter (8) and the A/D converter (9) being sequentially connected with；FPGA circuitry (6) is connected with GPS circuitry (10), A/D converter (9), D/A converter (4), transceiver insulation switch one (2), transceiver insulation switch two (7) and power model (1) respectively；GPS circuitry (10) is connected with A/D converter (9), D/A converter (4) respectively.
A kind of calibration source device based on high frequency over the horizon radar the most according to claim 1, it is characterised in that: described GPS circuitry (10) includes constant-temperature crystal oscillator, gps signal receiver module and synchronization module；GPS circuitry (10) produces the corresponding synchronizing signal consistent with radar work schedule, it is ensured that calibration source device and radar synchronize, and emitted circuit (5) produces correspondence calibration signal and launches under this sequential.
A kind of calibration source device based on high frequency over the horizon radar the most according to claim 2, it is characterised in that: described power circuit (12) includes solar energy receiver module and electric energy memory module；Power circuit (12) converts the solar into electric energy and stores, it is ensured that this calibration source device is operated in the wild environment of unregulated power supply.
A kind of calibration source device based on high frequency over the horizon radar the most according to claim 3, it is characterized in that: described reception circuit (11) receives radar emission signal, the local oscillation signal of the different center frequency produced with FPGA circuitry (6) after digitized is mixed, and obtains radar operating frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620278402.2U CN205450261U (en) | 2016-04-06 | 2016-04-06 | Calibration source device based on high frequency over --horizon radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620278402.2U CN205450261U (en) | 2016-04-06 | 2016-04-06 | Calibration source device based on high frequency over --horizon radar |
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| Publication Number | Publication Date |
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| CN205450261U true CN205450261U (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620278402.2U Expired - Fee Related CN205450261U (en) | 2016-04-06 | 2016-04-06 | Calibration source device based on high frequency over --horizon radar |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109597080A (en) * | 2018-12-29 | 2019-04-09 | 内蒙古工业大学 | Polarimetric calibration method, apparatus and system for cloud radar |
-
2016
- 2016-04-06 CN CN201620278402.2U patent/CN205450261U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109597080A (en) * | 2018-12-29 | 2019-04-09 | 内蒙古工业大学 | Polarimetric calibration method, apparatus and system for cloud radar |
| CN109597080B (en) * | 2018-12-29 | 2023-12-01 | 内蒙古工业大学 | Polarization calibration method, device and system for cloud radar |
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| Date | Code | Title | Description |
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| 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: 20160810 Termination date: 20190406 |
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| CF01 | Termination of patent right due to non-payment of annual fee |