CN208956026U - A kind of radio frequency protection circuit that anti-impulse wave breakdown is burnt with continuous wave - Google Patents
A kind of radio frequency protection circuit that anti-impulse wave breakdown is burnt with continuous wave Download PDFInfo
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- CN208956026U CN208956026U CN201822004991.7U CN201822004991U CN208956026U CN 208956026 U CN208956026 U CN 208956026U CN 201822004991 U CN201822004991 U CN 201822004991U CN 208956026 U CN208956026 U CN 208956026U
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- circuit
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- power distribution
- wave
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- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The radio frequency burnt the utility model discloses a kind of anti-impulse wave breakdown and continuous wave protects circuit, radio-frequency channel circuit, limiter and antenna, it further include power distribution module, wave detector, switch and ON-OFF control circuit, one end of switch is connected with radio-frequency channel circuit front-end, the other end of switch is grounded, the input terminal of power distribution module is connected with the output end of previous stage RF Components, the input terminal of the first output end connection rear stage RF Components of power distribution module, the second output terminal of power distribution module is connected with the input terminal of wave detector, the output end of wave detector is connected with the input terminal of ON-OFF control circuit, the output end of ON-OFF control circuit is connected with the control terminal of switch.This circuit can either solve impulse wave breakdown problem, and be able to solve continuous wave burnout problems, while structure is simple, can effectively control cost, additionally it is possible to protect analog-digital converter well.
Description
Technical field
The utility model relates to radio circuits to protect field, be specifically related to a kind of anti-impulse wave breakdown and continuous wave is burnt
Radio frequency protect circuit.
Background technique
The front end of broadband receiver usually has the radio frequency electrical of low-noise amplifier, frequency mixer and intermediate frequency amplifier composition
Road may cause device breakdown or even burn near receiver there are high-power interference signal or when participating in electronic countermeasure,
Receiver is caused to fail, so the protective capability for improving receiver occupies an important position in the design of receiver.Traditional penetrates
Frequency protection circuit is divided into two kinds, using the protection circuit of single limiter and using the protection circuit of multiple limiters.
It is as shown in Figure 1 the protection circuit for using single limiter, increases in the input front end of low-noise amplifier single
Limiter, can effectively reduce pulse spike sharp impulse wave power limit in 15dBm or so, prevent moment
Superelevation input pulse punctures first order low-noise amplifier.Single limiter can effectively antagonize poop wave, but can not
Continuous wave is fought, amplitude can only be limited in 15dBm or so by usual limiter, and after low-noise amplifier, which can quilt
Amplification, although output amplitude is limited to the saturation output power of low-noise amplifier, the output amplitude of amplifier would generally
More than the maximum input range that rear class active device allows, to cause burning for rear class active device.
If solving the problems, such as that continuous wave is burnt, the protection circuit of multiple limiters is generallyd use, as shown in Fig. 2,
The input terminal of each radio frequency active device adds a limiter, it is ensured that the input of each active device in radio circuit
Power does not all exceed the maximum input range of permission, effectively antagonizes impulse wave and continuous wave, but usually radio-frequency channel has four
To five active devices, so similarly needing to increase by four to five limiters, the volume that will lead to radio circuit in this way increases
One times, cost dramatically increases, and and then analog-digital converter (ADC), the maximum which allows are defeated for the end of radio-frequency channel
Entering power no more than 10dBm, signal is generally limited in 15dBm by limiter on the market at present, so, limiter can not
Enough protection analog-digital converters well.
Utility model content
To solve the above-mentioned problems, the purpose of the utility model is to provide one kind can either resist impulse wave breakdown and continuous wave
It burns, analog-digital converter, at low cost simultaneously, the simple radio frequency protection circuit of structure can be protected again.
The technical solution adopted in the utility model is:
A kind of radio frequency protection circuit that anti-impulse wave breakdown is burnt with continuous wave, including be arranged in antenna and analog-digital converter
Between radio-frequency channel circuit, the limiter of radio-frequency channel circuit front-end is set, radio-frequency channel circuit is by several radio frequency member devices
Part composition, further includes power distribution module, wave detector, switch and ON-OFF control circuit, one end and radio-frequency channel of the switch
Circuit front-end is connected, and the other end ground connection of switch, the power distribution module is arranged in the circuit of radio-frequency channel any two and penetrates
Between frequency component, the input terminal of power distribution module is connected with the output end of previous stage RF Components, power distribution mould
First output end of block is connected with the input terminal of rear stage RF Components, the second output terminal and wave detector of power distribution module
Input terminal be connected, the output end of the wave detector is connected with the input terminal of ON-OFF control circuit, the output of ON-OFF control circuit
It holds and is connected with the control terminal of switch.
Further, the power distribution module is coupler or power splitter.
Further, the ON-OFF control circuit includes diode and capacitor, the output end and diode of the wave detector
Anode be connected, the cathode of the diode is connected with the control terminal of switch, and the common end of diode and switch is connect by capacitor
Ground.
Further, the switch is RF switch.
The utility model has the beneficial effects that:
The utility model solves anti-impulse wave breakdown problem by limiter, connects one in the rear end of limiter and opens over the ground
It closes, when radio-frequency channel circuit works normally, switch is in an off state, and the interior power distribution of radio-frequency channel circuit is arranged in
Module separates a part of signal energy and is sent into wave detector, the output when wave detector detects that larger signal enters radio-frequency channel circuit
DC voltage will be closed the switch to ON-OFF control circuit, ON-OFF control circuit, and signal is short-circuited to ground, and protection late-class circuit will not
It burns, has the advantages that
1, the utility model can either solve impulse wave breakdown problem, and be able to solve continuous wave burnout problems.
2, circuit structure is simple, can effectively control cost.
3, using detection plus closed control circuit, amplitude can be limited in the input range of permission, is can be good at
Protect the analog-digital converter of radio-frequency devices and end.
4, it is short to detect and control the time, enters radio-frequency channel from interference signal, can control to the time closed the switch
Within 50ns.
5, using winding control technology, the state that additional controller carrys out control switch is not needed.
Detailed description of the invention
Fig. 1 is that the radio frequency of single limiter protects circuit diagram；
Fig. 2 is that the radio frequency of multiple limiters protects circuit diagram；
Fig. 3 is the schematic diagram that circuit is protected in the anti-impulse wave breakdown of the utility model with the radio frequency that continuous wave is burnt.
Specific embodiment
For technology contents, the objects and the effects that the utility model is described in detail, below in conjunction with embodiment and match
Attached drawing is closed to be explained.
It is illustrated in figure 3 the radio frequency protection circuit that a kind of anti-impulse wave breakdown of the utility model is burnt with continuous wave, packet
Include the radio-frequency channel circuit being arranged between antenna and analog-digital converter, the clipping that radio-frequency channel circuit input front end is set
Device, in the present embodiment radio-frequency channel circuit include two low-noise amplifiers being sequentially connected, frequency mixer, filter, in two
Audio amplifier, protection circuit further includes power distribution module 1, wave detector 2, switch 3 and ON-OFF control circuit, it is preferred that power
Distribution module 1 is coupler or power splitter, and switch 3 is RF switch, and ON-OFF control circuit includes diode 4 and capacitor 5.
Wherein, one end of switch 3 is connected with the input terminal of the low-noise amplifier of radio-frequency channel circuit front-end, switch 3
Other end ground connection, coupler/power splitter are arranged in the circuit of radio-frequency channel between any two RF Components, the present embodiment
The input terminal of middle coupler/power splitter is connected with the output end of low-noise amplifier, the first output end of coupler/power splitter with
Mixer input is connected, and coupler/power splitter can be arranged between frequency mixer and filter or filter and intermediate frequency
Between amplifier, coupler/power splitter second output terminal is connected with the input terminal of wave detector 2, the output end of wave detector 2 and two
The anode of pole pipe 4 is connected, and the cathode of diode 4 is connected with the control terminal of switch 3, and the common end of diode 4 and switch 3 passes through electricity
Hold 5 ground connection, certainly, the ON-OFF control circuit that ON-OFF control circuit can also be constituted using other components.
The working principle of the utility model are as follows:
When radio-frequency channel circuit works normally, switch is in an off state.
When more sharp pulse wave interference enters radio-frequency channel, limiter by input amplitude-limiting in 15dBm or so,
The breakdown of first order low-noise amplifier is not will cause.
When continuous wave CO_2 laser signal enters radio-frequency channel, and the duration is more than 10ns or more, and wave detector can detect
There is biggish signal to enter radio-frequency channel, so that one DC voltage related with interference signal amplitude of output, the voltage make two
Pole pipe conducting, and to capacitor charging, it after capacitor charging, generates high level and promotes to close the switch, penetrated to significantly reduce to enter
The signal amplitude (interference signal is short-circuited) in frequency channel.Since the control pin of diode and switch is all high resistant, capacitor electric discharge
Slowly, to make to switch lasting closure, even if after a period of time, switch is disconnected, if there is also enter interference signal at this time
It is next to detect and control the period, so recycle.
This circuit enters radio-frequency channel until closing the switch from interference signal, and the reaction time is less than 50ns, logical into radio frequency
The energy very little in road, can burning to avoid rear class active device.
The utility model solves anti-impulse wave breakdown problem by limiter, connects one in the rear end of limiter and opens over the ground
It closes, when radio-frequency channel circuit works normally, switch is in an off state, and the interior power distribution of radio-frequency channel circuit is arranged in
Module separates a part of signal energy and is sent into wave detector, the output when wave detector detects that larger signal enters radio-frequency channel circuit
DC voltage will be closed the switch to ON-OFF control circuit, ON-OFF control circuit, and signal is short-circuited to ground, and protection late-class circuit will not
It burns, has the advantages that
1, the utility model can either solve impulse wave breakdown problem, and be able to solve continuous wave burnout problems.
2, circuit structure is simple, can effectively control cost.
3, using detection plus closed control circuit, amplitude can be limited in the input range of permission, is can be good at
Protect the analog-digital converter of radio-frequency devices and end.
4, it is short to detect and control the time, enters radio-frequency channel from interference signal, can control to the time closed the switch
Within 50ns.
5, using winding control technology, the state that additional controller carrys out control switch is not needed.
The above is only the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all utilizations
Equivalents made by the utility model specification and accompanying drawing content are applied directly or indirectly in relevant technical field,
It similarly include in the scope of patent protection of the utility model.
Claims (4)
1. the radio frequency protection circuit that a kind of anti-impulse wave breakdown and continuous wave are burnt, including setting antenna and analog-digital converter it
Between radio-frequency channel circuit, the limiter of radio-frequency channel circuit input front end is set, radio-frequency channel circuit is by several radio frequencies members
Device composition, it is characterised in that: further include power distribution module (1), wave detector (2), switch (3) and ON-OFF control circuit, institute
The one end for stating switch (3) is connected with the input front end of radio-frequency channel circuit, the other end ground connection of switch (3), the power distribution
Module (1) is arranged in the circuit of radio-frequency channel between any two RF Components, the input terminal of power distribution module (1) with
The output end of previous stage RF Components is connected, the first output end and the rear stage RF Components of power distribution module (1)
Input terminal is connected, and the second output terminal of power distribution module (1) is connected with the input terminal of wave detector (2), the wave detector (2)
Output end is connected with the input terminal of ON-OFF control circuit, and the output end of ON-OFF control circuit is connected with the control terminal of switch (3).
2. radio frequency according to claim 1 protects circuit, it is characterised in that: the power distribution module (1) is coupler
Or power splitter.
3. radio frequency according to claim 1 protects circuit, it is characterised in that: the ON-OFF control circuit includes diode
(4) be connected with capacitor (5), the output end of the wave detector (2) with the anode of diode (4), the cathode of the diode (4) with
The control terminal for switching (3) is connected, and the common end of diode (4) and switch (3) is grounded by capacitor (5).
4. radio frequency according to claim 1 protects circuit, it is characterised in that: the switch (3) is RF switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822004991.7U CN208956026U (en) | 2018-11-29 | 2018-11-29 | A kind of radio frequency protection circuit that anti-impulse wave breakdown is burnt with continuous wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822004991.7U CN208956026U (en) | 2018-11-29 | 2018-11-29 | A kind of radio frequency protection circuit that anti-impulse wave breakdown is burnt with continuous wave |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208956026U true CN208956026U (en) | 2019-06-07 |
Family
ID=66745419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822004991.7U Withdrawn - After Issue CN208956026U (en) | 2018-11-29 | 2018-11-29 | A kind of radio frequency protection circuit that anti-impulse wave breakdown is burnt with continuous wave |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208956026U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109412622A (en) * | 2018-11-29 | 2019-03-01 | 湖南迈克森伟电子科技有限公司 | A kind of radio frequency protection circuit that anti-impulse wave breakdown is burnt with continuous wave |
-
2018
- 2018-11-29 CN CN201822004991.7U patent/CN208956026U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109412622A (en) * | 2018-11-29 | 2019-03-01 | 湖南迈克森伟电子科技有限公司 | A kind of radio frequency protection circuit that anti-impulse wave breakdown is burnt with continuous wave |
| CN109412622B (en) * | 2018-11-29 | 2023-08-15 | 湖南迈克森伟电子科技有限公司 | Radio frequency protection circuit for resisting pulse wave breakdown and continuous wave burnout |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190607 Effective date of abandoning: 20230815 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20190607 Effective date of abandoning: 20230815 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |