CN208353349U - A kind of radar antenna reception signal conditioner - Google Patents
A kind of radar antenna reception signal conditioner Download PDFInfo
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- CN208353349U CN208353349U CN201821035906.7U CN201821035906U CN208353349U CN 208353349 U CN208353349 U CN 208353349U CN 201821035906 U CN201821035906 U CN 201821035906U CN 208353349 U CN208353349 U CN 208353349U
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Abstract
The utility model is that a kind of radar antenna receives signal conditioner, the present apparatus increases directional coupler, wave detector, microwave switch, photoswitch and control unit newly, and having n optical transmitter module, the amplification factor of each optical transmitter module amplifier is different, the power interval of corresponding different microwave signal.The received microwave signal of antenna is directed coupler and is divided into two-way, and most of into microwave switch, fraction detects performance number into wave detector.Control unit presses the optical transmitter module that current signal power value selects the amplification factor of corresponding power interval according to testing result, controls microwave switch, accesses current microwave signal；And it controls photoswitch and the output of selected optical transmitter module is terminated into transmission fiber；Optical signal is converted to after microwave signal amplification；Optical receiver module is sent to through transmission fiber.Amplification factor is selected by signal power, big signal has biggish magnifying power, guarantee the dynamic range of entire radar system without decaying, small signal.
Description
Technical field
The utility model relates to radar reception technique field, specially a kind of radar antenna receives signal conditioner.
Background technique
Radar and antenna etc. are widely applied in Modern Communication System, and radar, antenna and central machine room have certain distance, than
When closer, such as tens meters of distance, one two hundred meters, radar return signal can be transmitted directly to central machine room with cable.But have
Actual conditions be that radar, antenna etc. are distant at a distance from central machine room, several kilometers of some distances, some even apart from several
Ten kilometers.In farther away situation, the loss that radar signal is transmitted in the cable is very big, needs to be transmitted with optical fiber.
In this way, the signal that radar, antenna etc. receive usually amplified will be reconverted into optical signal and be transmitted.Due to radar,
It is fluctuation that antenna etc., which receives signal amplitude, and signal power size is uncertain.Now there are two types of the sides of processing radar signal
The signal that method can meet different capacity size simultaneously can meet whole system application, improve the dynamic range of system.Wherein one
Kind is according to the maximum signal power that can receive come the amplification factor of Design enlargement device to method for processing radar signals；It is another
Kind is one wave detector of increase under antenna, while increasing a numerical-control attenuator in amplifier front-end, is detected according to wave detector
The attenuation size of signal power amplitude adjusted numerical-control attenuator out.The advantages of first method is when receiving big signal
Whole system will not be saturated, the non-linear, distorted signals etc. for avoiding whole system from generating when receiving big signal by saturation；
But because the amplifier multiple of the method is according to Large Signal Design, amplification factor is smaller, such received signal power
Lower hour, amplification factor is just inadequate, influences the dynamic range of whole system.The advantages of second method is that big signal passes through number
Control attenuator is decayed to avoid the non-linear, distorted signals etc. generated by saturation, but big signal passes through numerical control attenuation
After device decaying, the noise coefficient of big signal will increase.
Utility model content
The purpose of this utility model is to design a kind of radar antenna reception signal conditioner, newly-increased directional coupler,
Wave detector, microwave switch, photoswitch and control unit, and have n optical transmitter module, the times magnification of each optical transmitter module amplifier
Number is different, the power interval of corresponding different microwave signal.Received microwave signal power obtains biggish magnifying power when smaller,
And received microwave signal power it is larger when, without decaying, into the lesser amplifier of magnifying power；To guarantee entire radar
The dynamic range of system, while not will increase the noise of system it is unnecessary to prevent the full conjunction value more than system from decaying yet
Coefficient.
A kind of radar antenna of the utility model design receives signal conditioner, including antenna and optical transmitter module,
Optical transmitter module contains amplifier and photoelectric converter, converts one end of resulting optical signal access transmission fiber, transmission fiber
The other end connects optical receiver module, and the received microwave signal access directional coupler of the utility model antenna believes most of microwave
Number access microwave switch, the wave detector of fraction microwave signal access detection microwave signal power, the detection signal of wave detector connect
Enter control unit, the control terminal of control unit is separately connected microwave switch and photoswitch, and microwave switch connects n light emitting mould
Block, n are the integer equal to or more than 2, and control unit controls microwave switch according to the signal of wave detector and microwave signal is accessed it
In some optical transmitter module.Each optical transmitter module contains an amplifier and a photoelectric converter, the n of n optical transmitter module
The amplification factor of a amplifier is different.Microwave signal into optical transmitter module is amplified into photoelectric converter turn through amplifier
For optical signal.Each optical transmitter module connects photoswitch, and control unit controls photoswitch, makes the optical transmitter module for accessing microwave signal
It is connect with transmission fiber one end, which connects the optical receiver module in computer room.
According to the maximum power X (unit dBm) and minimum power Z (unit dBm) of the received microwave signal of antenna, it is divided into n
A section, n section i.e.:
Z~(Z+1* (X-Z)/n),
(Z+1* (X-Z)/n)~(Z+2* (X-Z)/n),
(Z+2* (X-Z)/n)~(Z+3* (X-Z)/n),
……
(Z+ (n-1) * (X-Z)/n)~X；
The amplifier of the corresponding optical transmitter module of each power interval, the optical transmitter module amplification in corresponding maximum power section
The amplification factor of device is A (unit dB), and A+X is less than the saturation power value of radar system, the corresponding n light hair of n power interval
Penetrate the amplification factor of the amplifier of module successively are as follows:
A,
A+1* (X-Z)/n,
A+2* (X-Z)/n,
A+3* (X-Z)/n,
……
A+(n-1)*(X-Z)/n。
Preferred version is the integer part that n is (X-Z), and the power unit of X and Z are dBm.
The directional coupler divides power ratio to be (1/20)~(1/10).
A kind of radar antenna of the utility model design receives signal conditioner in use, the antenna is received micro-
Wave signal is divided into two-way in directional coupler, most of to enter microwave switch, and fraction enters wave detector；Wave detector detection receives
Microwave signal power value, testing result signal be sent into control unit；Control unit is believed according to the current testing result of wave detector
Number, there is the locating corresponding amplifier magnification ratio of power interval therewith by the performance number selection of currently received microwave signal
Optical transmitter module controls microwave switch, by the optical transmitter module that the access of current microwave signal is selected；Control unit controls light simultaneously
Switch connects one end of the output end of currently selected optical transmitter module and transmission fiber；The currently selected light hair of control unit
The amplifier penetrated in module amplifies received microwave signal, and is converted to optical signal through photoelectric converter；Currently selected light
The optical signal of transmitting module output is sent to optical receiver module through transmission fiber.
Compared with prior art, a kind of radar antenna of the utility model receives the advantages of signal conditioner are as follows: 1, more
The different amplifier of a optical transmitter module configuration amplification factor, the control unit detection signal current according to wave detector, by current
The power interval for receiving signal selects corresponding optical transmitter module, thus when currently received microwave signal power is smaller, control
Unit feeds them into the biggish optical transmitter module of magnifying power, guarantees the dynamic range of entire radar system；And it is currently received micro-
When wave signal power is larger, control unit feeds them into the biggish optical transmitter module of magnifying power, because without being in order to prevent more than to be
The full conjunction value of system decays, and the noise coefficient of system not will increase；2, the amplifier magnification ratio in multiple optical transmitter modules
Increase by ladder, multiple sections can be divided into according to the power for being currently received signal, realizes precise controlling；3, present apparatus structure
Simply, easy to implement.
Detailed description of the invention
Fig. 1 is that this radar antenna receives signal conditioner example structure schematic diagram.
Specific embodiment
This radar antenna receives signal conditioner embodiment as shown in Figure 1, including antenna and optical transmitter module, light hair
It penetrates module and contains amplifier and photoelectric converter, convert one end of resulting optical signal access transmission fiber, transmission fiber is another
End connection optical receiver module,
The received microwave signal of antenna (being indicated in figure with heavy line) accesses directional coupler, point of this example directional coupler
Light ratio is 1/20, i.e., 20 parts of microwave signal is accessed microwave switch, the inspection of 1 part of microwave signal access detection microwave signal power
Wave device.The detection signal of wave detector accesses control unit, and the control terminal of control unit is separately connected microwave switch and photoswitch (figure
In indicated with fine line).The maximum power X=-10dBm of the received microwave signal of this example antenna, minimum power Z=-60dBm,
This is divided into n section, n=X-Z=50.50 sections are as follows:
- 60~-59,
- 59~-58,
- 58~-57,
……
- 11~-10；
Microwave switch connects 50 optical transmitter modules.Each optical transmitter module contains an amplifier and a photoelectric conversion
Device, the amplification factor of the optical transmitter module amplifier in corresponding maximum power section -11~-10 are A=10dB, X+A=0dBm, small
In the saturation power value 1dBm of this example radar system, the amplification of the amplifier of corresponding 50 optical transmitter modules of 50 power intervals
Multiple is successively are as follows:
A,
A+1,
A+2,
A+3,
……
A+59。
By this example as it can be seen that when the received microwave signal power of antenna is minimum, the optical transmitter module amplification of present apparatus selection
The amplification factor of device be microwave signal power highest when more than five times, not only in microwave signal power highest guarantee amplification letter
Number power is no more than the saturation power value of radar system, and when microwave signal power is minimum also can guarantee that radar system is had
Imitate signal.
Into optical transmitter module microwave signal through amplifier be amplified into photoelectric converter switch to optical signal (in figure with
Dotted line indicates).Each optical transmitter module connects photoswitch, and control unit controls photoswitch, makes the light emitting mould for accessing microwave signal
Block is connect with transmission fiber one end, which connects the optical receiver module in computer room.
Above-described embodiment is only further described the purpose of this utility model, technical scheme and beneficial effects
Specific case, the utility model are not limited to this.All any modifications made within the scope of disclosure of the utility model,
Equivalent replacement, improvement etc., are included in the protection scope of the present invention.
Claims (4)
1. a kind of radar antenna receives signal conditioner, including antenna and optical transmitter module, optical transmitter module contain amplification
Device and photoelectric converter, convert one end of resulting optical signal access transmission fiber, and the transmission fiber other end connects light-receiving mould
Block, it is characterised in that:
Most of microwave signal is accessed microwave switch by the received microwave signal access directional coupler of antenna, and fraction is micro-
The wave detector of wave signal access detection microwave signal power, the detection signal of wave detector access control unit, the control of control unit
End processed is separately connected microwave switch and photoswitch, and microwave switch connects n optical transmitter module, and n is the integer equal to or more than 2,
Control unit controls microwave switch according to the signal of wave detector and microwave signal is accessed wherein some optical transmitter module；Each light emitting
Module contains an amplifier and a photoelectric converter, and the amplification factor of n amplifier of n optical transmitter module is different；Into
The microwave signal for entering optical transmitter module is amplified into photoelectric converter through amplifier and switchs to optical signal；Each optical transmitter module connection
Photoswitch, control unit control photoswitch, connect the optical transmitter module for accessing microwave signal with transmission fiber one end, the transmission
The optical fiber other end connects the optical receiver module in computer room.
2. radar antenna according to claim 1 receives signal conditioner, it is characterised in that:
According to the maximum power X and minimum power Z of the received microwave signal of antenna, it is divided into n section, n section is
Z~(Z+1* (X-Z)/n),
(Z+1* (X-Z)/n)~(Z+2* (X-Z)/n),
(Z+2* (X-Z)/n)~(Z+3* (X-Z)/n),
……
(Z+ (n-1) * (X-Z)/n)~X；
The amplifier of the corresponding optical transmitter module of each power interval, the optical transmitter module amplifier in corresponding maximum power section
Amplification factor is A, and AX is less than the saturation power value of radar system, the amplifier of the corresponding n optical transmitter module of n power interval
Amplification factor successively are as follows:
A,
A+1* (X-Z)/n,
A+2* (X-Z)/n,
A+3* (X-Z)/n,
……
A+(n-1)*(X-Z)/n。
3. radar antenna according to claim 1 receives signal conditioner, it is characterised in that: the n is (X-Z)
The power unit of integer part, X and Z are dBm.
4. radar antenna according to claim 1 receives signal conditioner, it is characterised in that: the directional coupler
Splitting ratio be (1/20)~(1/10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821035906.7U CN208353349U (en) | 2018-07-02 | 2018-07-02 | A kind of radar antenna reception signal conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821035906.7U CN208353349U (en) | 2018-07-02 | 2018-07-02 | A kind of radar antenna reception signal conditioner |
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| Publication Number | Publication Date |
|---|---|
| CN208353349U true CN208353349U (en) | 2019-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821035906.7U Active CN208353349U (en) | 2018-07-02 | 2018-07-02 | A kind of radar antenna reception signal conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108574534A (en) * | 2018-07-02 | 2018-09-25 | 中国电子科技集团公司第三十四研究所 | A kind of radar antenna receives signal conditioner and preprocess method |
-
2018
- 2018-07-02 CN CN201821035906.7U patent/CN208353349U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108574534A (en) * | 2018-07-02 | 2018-09-25 | 中国电子科技集团公司第三十四研究所 | A kind of radar antenna receives signal conditioner and preprocess method |
| CN108574534B (en) * | 2018-07-02 | 2023-09-15 | 中国电子科技集团公司第三十四研究所 | Radar antenna received signal preprocessing device and preprocessing method |
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