CN201876542U - Protection circuit for C-band solid-state radar receiver - Google Patents
Protection circuit for C-band solid-state radar receiver Download PDFInfo
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- CN201876542U CN201876542U CN2010205762742U CN201020576274U CN201876542U CN 201876542 U CN201876542 U CN 201876542U CN 2010205762742 U CN2010205762742 U CN 2010205762742U CN 201020576274 U CN201020576274 U CN 201020576274U CN 201876542 U CN201876542 U CN 201876542U
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- waveguide
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- protection circuit
- radar receiver
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Abstract
The utility model discloses a protection circuit for a C-band solid-state radar receiver. The protection circuit mainly comprises a waveguide magic T, a switch base and a waveguide short-circuiting device, and is characterized in that the waveguide magic T and the switch base, as well as the waveguide short-circuiting device are in mutual signal transmission; and one end of the waveguide magic T is in signal connection with the waveguide short-circuiting device, and the other end of the waveguide magic T is in signal connection with the switch base. The protection circuit has the advantages that the service life can reach tens of thousands of hours by adopting solid-state device pin diodes; by adopting the waveguide magic T and the two pin diodes connected in parallel, the stand power is four to eight times of that of a single Pin diode; and when a high power is emitted, the pin diodes are conducted, so as to shorten the recovery time, and the recovery time can reach <=0.5 microseconds.
Description
Technical field:
The utility model relates to a kind of microwave circuit field, relates in particular to a kind of holding circuit of C-band solid-state radar receiver.
Background technology:
The holding circuit of at present general high powered radar receiver all is a gas-discharge tube; it utilizes gas can produce ionization in the HIGH-POWERED MICROWAVES electromagnetic field becomes the plasma electric conductor; to stop emissive power to enter receiver, with the low noise amplifier of protection receiver front end.
Gas-discharge tube is because gas ionization can sacrificial electrode and gas, so the life-span is shorter, the general life-span is a hundreds of hour.Another problem is release time, i.e. after the HIGH-POWERED MICROWAVES pulse, return to normal accepting state, wants 2～3 (microseconds) usually.Many radars often require release time≤0.5 microsecond, and at this moment, gas-discharge tube does not just satisfy requirement.
The utility model content:
The purpose of this utility model is to be used for remedying the deficiencies in the prior art, and provides a kind of life-span long, and it is big to bear power, the C-band solid-state radar receiver protection circuit that release time is short.
To achieve these goals, the technical solution of the utility model is as follows:
C-band solid-state radar receiver protection circuit, it mainly comprises waveguide evil spirit T, a switch base and a waveguide short device; It is characterized in that, described waveguide evil spirit T and switch base, the mutual signal transmission of waveguide short device, described waveguide evil spirit T one end signal connects the waveguide short device, and other end signal connects described switch base.
Described waveguide evil spirit T, its signal is by the input of E end, and the H end is isolation end, and signal is held branch output level with both hands by 1,2, and its phase place is identical; Signal is by the input of H end, and the E end is isolation end, and signal is held branch output level with both hands by 1,2, and phase place is opposite, promptly differs 180 degree.
Described switch base is that high-power PIN diode is contained in the reflection phase shifter that constitutes in the short circuited waveguide, when PIN diode conducting when (adding positive voltage), the reflected signal of switch base is 0 degree, and when not conducting of PIN diode when (adding negative voltage), the reflected signal of switch base is 180 degree.
Described waveguide short device is a step ridge waveguide short device.
The utility model advantage is: adopt the solid-state devices PIN diode, its life-span can reach several ten thousand hours; Adopt waveguide evil spirit T, two technology such as PIN diode parallel connection make and bear the big 4-8 of the single PIN diode of power ratio doubly; Be designed to launch PIN diode conducting when high-power, not conducting when receiving the miniwatt echoed signal, thus reduced requirement to the breakdown reverse voltage of PIN diode, thus release time shortened, can reach≤0.5 microsecond.
Description of drawings:
Further specify the utility model below in conjunction with the drawings and specific embodiments.
Fig. 1 is the synoptic diagram of the utility model circuit.
Embodiment:
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
With reference to shown in Figure 1:
C-band solid-state radar receiver protection circuit, it mainly comprises waveguide evil spirit T (4), a switch base 5 and a waveguide short device 3; Described waveguide evil spirit T (4) and switch base 5, the 3 mutual signal transmission of waveguide short device, described waveguide evil spirit T (4) one end signals connect waveguide short device 3, and other end signal connects described switch base 5.
Described waveguide evil spirit T (4), its signal is by the input of E end, and the H end is isolation end, and signal is held branch output level with both hands by 1,2, and its phase place is identical; Signal is by the input of H end, and the E end is isolation end, and signal is held branch output level with both hands by 1,2, and phase place is opposite, promptly differs 180 degree.
Described switch base 5 is that high-power PIN diode is contained in the reflection phase shifter that constitutes in the short circuited waveguide.When PIN two diode current flows when (adding positive voltage), the reflected signal of switch base 5 is 0 degree, and when not conducting of PIN diode when (adding negative voltage), the reflected signal of switch base 5 is 180 degree;
Described waveguide short device 3 is step ridge waveguide short devices, adopts the step ridge waveguide, is in order to improve frequency characteristic, the broadening working band.
The purpose of this utility model is achieved in that when the radar emission Mechanism of High Power Microwave Pulse, on PIN diode, add positive voltage, make the PIN diode conducting, the reflected signal of switch base is 0 degree, the signal of E end that is added to waveguide evil spirit T (4) is with total reflection, the H end has been protected receiver for isolating output; When radar transmitted pulse finishes, radar enters accepting state, add negative voltage on the PIN diode this moment, make not conducting of PIN diode, the reflected signal of switch base 5 is 180 degree, the echoed signal that this moment, antenna received is added to the signal of the E end of waveguide evil spirit T (4) and will exports by the H port, and it is very little that skewer is gone into loss, delivers to receiver.
The E end of waveguide evil spirit T (4) and H end are that the BJ58 waveguide of standard (inside dimension a=40.386mm, b=20.193mm), 1,2 ends are half high waveguide, a '=a, b '=b/2, i.e. b '=10.1mm.For compact conformation and easy to connect, adopted abnormal magic T to form, E port and H port are on the same axis, and the electric field quadrature, also that 1,2 ports are the parallel simultaneously same example that is placed on the E-H axis.
The interface of switch base 5 is half high waveguide (inside dimension a=40.386mm, the b '=10.1mm) of BJ-58.Parallel two high-power PIN diode, the half high waveguide other end short circuit formation reflection phase shifter of being equipped with in the switch base.When the PIN diode conducting, the reflected signal of switch base 5 is 0 degree, and when not conducting of PIN diode, the reflected signal phase place of switch base 5 is 180 degree, that is to say that the PIN diode conducting compares with not conducting, and the phase phasic difference 180 of reflected signal is spent.
More than show and described ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the instructions just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1.C wave band solid-state radar receiver protection circuit, it mainly comprises waveguide evil spirit T (4), a switch base (5) and a waveguide short device (3); It is characterized in that, described waveguide evil spirit T (4) and the signal transmission mutually of switch base (5), waveguide short device (3), described waveguide evil spirit T (4) one end signals connect waveguide short device (3), and other end signal connects described switch base (5).
2. according to the C-band solid-state radar receiver protection circuit under the claim 1, it is characterized in that: described waveguide evil spirit T (4), its signal is by the input of E end, and the H end is isolation end, and signal is held branch output level with both hands by 1,2, and its phase place is identical; Signal is by the input of H end, and the E end is isolation end, and signal is held branch output level with both hands by 1,2, and phase place is opposite, promptly differs 180 degree.
3. according to the C-band solid-state radar receiver protection circuit under the claim 1; it is characterized in that; described switch base (5) is that high-power PIN diode is contained in the reflection phase shifter that constitutes in the short circuited waveguide; when the PIN diode conducting; the reflected signal of switch base (5) is 0 degree; when not conducting of PIN diode, the reflected signal of switch base (5) is 180 degree.
4. according to the C-band solid-state radar receiver protection circuit under the claim 1, it is characterized in that described waveguide short device (3) is a step ridge waveguide short device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205762742U CN201876542U (en) | 2010-10-22 | 2010-10-22 | Protection circuit for C-band solid-state radar receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205762742U CN201876542U (en) | 2010-10-22 | 2010-10-22 | Protection circuit for C-band solid-state radar receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201876542U true CN201876542U (en) | 2011-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205762742U Expired - Fee Related CN201876542U (en) | 2010-10-22 | 2010-10-22 | Protection circuit for C-band solid-state radar receiver |
Country Status (1)
| Country | Link |
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| CN (1) | CN201876542U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199533A (en) * | 2016-06-27 | 2016-12-07 | 芜湖航飞科技股份有限公司 | A kind of high power secondary radar transceiver protection device |
-
2010
- 2010-10-22 CN CN2010205762742U patent/CN201876542U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199533A (en) * | 2016-06-27 | 2016-12-07 | 芜湖航飞科技股份有限公司 | A kind of high power secondary radar transceiver protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110622 Termination date: 20131022 |