CN209728157U - Based on radio frequency analog device novel signal receiver - Google Patents
Based on radio frequency analog device novel signal receiver Download PDFInfo
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- CN209728157U CN209728157U CN201821974787.1U CN201821974787U CN209728157U CN 209728157 U CN209728157 U CN 209728157U CN 201821974787 U CN201821974787 U CN 201821974787U CN 209728157 U CN209728157 U CN 209728157U
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Abstract
The utility model discloses one kind to be based on radio frequency analog device novel signal receiver, the preposition AGC module successively passed through including radiofrequency signal, down conversion module, intermediate frequency AGC module, intermediate frequency amplifier and intermediate frequency protect attenuator, preposition AGC module is for controlling attenuator control amount, the radiofrequency signal that AGC module exports is converted to intermediate-freuqncy signal by down conversion module, intermediate frequency AGC module receives the intermediate-freuqncy signal of down conversion module output, the amplitude that intermediate frequency amplifier receives the intermediate-freuqncy signal of intermediate frequency AGC module output amplifies, intermediate frequency protection attenuator exports intermediate-freuqncy signal after receiving the intermediate-freuqncy signal of intermediate frequency amplifier.It is provided by the utility model to be based on radio frequency analog device novel signal receiver, it is able to solve the problem that existing radio frequency analog device receiver exports intermediate-freuqncy signal harmonic wave, spuious difference when inputting high-power signal.
Description
Technical field
The utility model relates to be based on radio frequency analog device novel signal receiver, belong to radar radio frequency simulation field.
Background technique
With the development and application of electronic technology and signal processing technology, the requirement of radar radio frequency simulation test is also increasingly
Height, the authenticity for increasingly requiring radio frequency simulation to test.When existing emulation test system carries out l-G simulation test, being will by radar
The pumping signal of transmitter front ends disconnects, and is connected to the excitation on the input port of radio frequency analog device as radio frequency analog device
The total system of radar cannot be brought into test by signal, such test method, and there is differences with actual use.
In order to meet the requirement of radar radio frequency simulation test, now with radio frequency analog designed and increase empty feedback
Receives link, it is desired to be able to which the signal that radar is emitted by transmitter and antenna is received by the empty received mode of feedback.In reality
In use process, radio frequency analog device receives radar signal by empty feedback mode, because of the opposite fortune of receiving antenna and radar antenna
It is dynamic that very big reception signal amplitude is brought to rise and fall, so that radio frequency analog device amplitude output signal is also with input signal amplitude size
Change and change, influences test effect.
In order to not change radio frequency analog device amplitude output signal, some radio frequencies as input signal amplitude rises and falls
Simulator increases AGC auto-gain control chain circuit in empty feedback signal receives link, it is desirable to the output of radio frequency analog device receiver
Signal stabilization in certain amplitude, thus meet radar radio frequency simulation test demand.However it sends out in actual use
Existing, radio frequency analog device also can be normal defeated when having used biggish gain circuitry in receives link to guarantee the input of small signal
Out, but this processing mode is when big signal inputs, because input signal is larger, the intermediate-freuqncy signal after carrying out down-converted exists
It is also larger into intermediate frequency amplifier front signal amplitude, signal intermodulation and biggish harmonic wave letter can occur after intermediate frequency amplifier
Number, quality of output signals is influenced, makes the test of radar radio frequency simulation that cannot obtain ideal effect.Simultaneously in order to radio frequency analog device
Receiver back end signal processing unit is protected, and avoids needing because of the excessive damage signal processing unit of receiver output signal
Biggish attenuator is added in receiver rear end, this also affects the actual working efficiency of receiver, and it is defeated to reduce receiver
The signal-to-noise ratio of signal out finally will affect radar radio frequency simulation test effect, not be able to satisfy test requirements document.
With the development of electronic technology and information technology, radar processing capacity is more and more stronger, wants to radio frequency simulation test
Ask also higher and higher, in order to meet the needs of radar radio frequency simulation test, radio frequency analog device technology needs to obtain further
Raising, the development of radio frequency analog device signal receiver technology is exactly an important break-through point.
Existing radio frequency analog device receiver exports intermediate-freuqncy signal harmonic wave when inputting high-power signal, the reason of spuious difference exists
In in order to meet the required power of intermediate frequency AD sampling, the signal that receiver changes to intermediate frequency by under is put by intermediate frequency amplifier
Greatly, however when input signals are large, intermediate frequency amplifier output signal is made to be in saturation output, amplifier saturation output will necessarily
The harmonic wave of output signal, spuious deterioration are brought, simultaneously because saturation output also makes the signal-to-noise ratio degradation of output signal.However,
In the signal by intermediate frequency amplifier output, make to guarantee that the signal for inputting IF signal processing unit A/D module is not too big
It obtains IF signal processing unit A/D module to be burned out, so also needing to pass through decaying after intermediate-freuqncy signal is by intermediate frequency amplifier
Device makes the signal of final receiver output without departing from the range that IF signal processing unit A/D module works, but increases attenuator
Afterwards, the working efficiency of amplifier is reduced, also further decreases the signal-to-noise ratio of receiver output signal.Although existing
Radio frequency analog device receiver designs preposition AGC circuit, to guarantee that the power of receiver output can satisfy IF signal processing list
The demand of member input, however since radio frequency analog device operation of receiver frequency range is very wide, all frequency input signals can not be solved
Afterwards by the quality problems of processing output intermediate-freuqncy signal.
Utility model content
The technical problems to be solved in the utility model is to overcome the deficiencies of existing technologies, provide one kind be able to solve it is existing
Radio frequency analog device receiver exported when inputting high-power signal intermediate-freuqncy signal harmonic wave, spuious difference problem based on radio frequency analog
Device novel signal receiver.
In order to solve the above technical problems, the technical solution adopted by the utility model is:
One kind be based on radio frequency analog device novel signal receiver, the preposition AGC module successively passed through including radiofrequency signal, under
Frequency-variable module, intermediate frequency AGC module, intermediate frequency amplifier and intermediate frequency protect attenuator, and the preposition AGC module is used for attenuator control
Amount processed is controlled, and the radiofrequency signal that the AGC module exports is converted to intermediate-freuqncy signal, the intermediate frequency by the down conversion module
AGC module receives the intermediate-freuqncy signal of down conversion module output, and the intermediate frequency AGC module includes detecting circuit, differential ratio width circuit
And attenuation control circuit, intermediate-freuqncy signal obtain the level of intermediate-freuqncy signal by the detecting circuit, level is input to institute after detection
State differential ratio width circuit, the differential ratio width circuit will be by the amplitude difference level feed-back of level after detection and the level of setting to institute
It states in attenuation control circuit, the attenuation control circuit is in real time adjusted attenuation according to the amplitude difference level of input,
The amplitude that the intermediate frequency amplifier receives the intermediate-freuqncy signal of the intermediate frequency AGC module output amplifies, and the intermediate frequency protection declines
Subtract after device receives the intermediate-freuqncy signal of the intermediate frequency amplifier and exports intermediate-freuqncy signal.
The preposition AGC module is the preposition AGC module based on DATT-0218G chip.
The down conversion module is the down conversion module based on MIXER-MM93MS-13 chip.
The intermediate frequency AGC module is the intermediate frequency AGC module based on HMC346 chip.
The intermediate frequency amplifier is the intermediate frequency amplifier based on ERA4-0010-0150 chip.
The intermediate frequency protection attenuator is the coaxial attenuator based on SMAG2-10dB-18G.
The utility model has the beneficial effects that provided by the utility model be based on radio frequency analog device novel signal receiver, base
In radio frequency analog device novel signal receiver by increasing before intermediate frequency amplifier in existing radio frequency analog device receiver circuit
Level-one intermediate frequency AGC control circuit makes the signal for being input to intermediate frequency amplifier not make intermediate frequency amplifier saturation output, to improve
The harmonic wave of receiver output signal and spuious quality, while the maximum output of intermediate frequency amplifier is also limited, it can effectively protect
It protects medium frequency reception plate and output signal-noise ratio is optimized.
Detailed description of the invention
Fig. 1 is modular structure schematic diagram of the utility model based on radio frequency analog device novel signal receiver.
Specific embodiment
The utility model is further described with reference to the accompanying drawing, following embodiment is only used for clearly illustrating this
The technical solution of utility model, and cannot be used as a limitation the limitation protection scope of the utility model.
As shown in Figure 1, a kind of be based on radio frequency analog device novel signal receiver, successively pass through including radiofrequency signal preposition
AGC module, down conversion module, intermediate frequency AGC module, intermediate frequency amplifier and intermediate frequency protect attenuator.Specifically, preposition AGC module
It is the preposition AGC module based on DATT-0218G chip.Down conversion module is the lower change based on MIXER-MM93MS-13 chip
Frequency module.Intermediate frequency AGC module is the intermediate frequency AGC module based on HMC346 chip.Intermediate frequency amplifier is based on ERA4-0010-
The intermediate frequency amplifier of 0150 chip.It is the coaxial attenuator based on SMAG2-10dB-18G that intermediate frequency, which protects attenuator,.
After radiofrequency signal input radio frequency simulator, preposition AGC module is first passed through, preposition AGC module is believed according to input radio frequency
Number amplitude adjust automatically, the signal amplitude exported by preposition AGC module is maintained at certain level to meet system
Demand.Preposition AGC module receives signal amplitude according to medium frequency reception plate, to the attenuator control amount in preposition AGC module into
Row control, to meet the requirement of medium frequency reception plate input signal amplitude.The signal of preposition AGC module output passes through down conversion module
Intermediate-freuqncy signal needed for radiofrequency signal is converted into radio frequency analog device IF signal processing module.The intermediate frequency of down conversion module output
Signal passes through intermediate frequency AGC resume module, makes the intermediate-freuqncy signal amplitude for inputting intermediate frequency amplifier that intermediate frequency amplifier saturation will not be made defeated
Make the harmonic wave of intermediate frequency amplifier output signal, spuious deterioration out.Intermediate frequency amplifier receives the intermediate frequency letter of intermediate frequency AGC module output
Number amplitude amplify to meet the needs of radio frequency analog device IF signal processing module input signal.Intermediate frequency amplifier output
Maximum signal amplitudes can be greater than radio frequency analog device IF processing unit input signal amplitude requirement, pass through intermediate frequency protection decaying
Device is so that the signal amplitude of receiver output meets the amplitude requirement of radio frequency analog device input signal.Intermediate frequency protects attenuator to receive
Intermediate-freuqncy signal is exported after the intermediate-freuqncy signal of intermediate frequency amplifier, avoids the letter for being output to radio frequency analog device IF signal processing module
It is number excessive so that intermediate frequency signal processor receives damage.
Specifically, intermediate frequency AGC module receives the intermediate-freuqncy signal of down conversion module output.Intermediate frequency AGC module includes detection electricity
Road, differential ratio width circuit and attenuation control circuit.Intermediate-freuqncy signal obtains the level of intermediate-freuqncy signal by detecting circuit, after detection
Level is input to differential ratio width circuit, and differential ratio width circuit will carry out the level of level after detection and setting to have obtained two than width
The amplitude difference level of person, by amplitude difference level feed-back into attenuation control circuit, attenuation control circuit is according to the amplitude difference of input
Level is in real time adjusted attenuation, with meet intermediate frequency AGC module output intermediate-freuqncy signal amplitude needs range it
It is interior.Intermediate frequency AGC module is the supplement to preposition AGC module, preposition when receiver input signal amplitude fluctuations are violent
AGC module receives signal amplitude adjustment amplitude output signal according to medium frequency reception plate and cannot timely respond to, when input signal is prominent
It may cause medium frequency reception plate cisco unity malfunction when so becoming excessive, be abnormal receiver, at this moment can pass through intermediate frequency
AGC module effectively limits the signal amplitude of input medium frequency reception plate, can work normally receiver.
The above is only the preferred embodiment of the utility model, it should be pointed out that: for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the protection scope of the utility model.
Claims (6)
1. one kind is based on radio frequency analog device novel signal receiver, it is characterised in that: successively pass through including radiofrequency signal preposition
AGC module, down conversion module, intermediate frequency AGC module, intermediate frequency amplifier and intermediate frequency protect attenuator, and the preposition AGC module is used for
Attenuator control amount is controlled, the radiofrequency signal that the AGC module exports is converted to intermediate frequency and believed by the down conversion module
Number, the intermediate frequency AGC module receives the intermediate-freuqncy signal of down conversion module output, and the intermediate frequency AGC module includes detecting circuit, difference
Divide than width circuit and attenuation control circuit, intermediate-freuqncy signal obtains the level of intermediate-freuqncy signal by the detecting circuit, electric after detection
Flat to be input to the differential ratio width circuit, the differential ratio width circuit is by the amplitude difference level of level after detection and the level of setting
Feed back in the attenuation control circuit, the attenuation control circuit according to the amplitude difference level of input in real time to attenuation into
Row adjustment, the amplitude that the intermediate frequency amplifier receives the intermediate-freuqncy signal of the intermediate frequency AGC module output amplify, the intermediate frequency
Intermediate-freuqncy signal is exported after protecting attenuator to receive the intermediate-freuqncy signal of the intermediate frequency amplifier.
2. according to claim 1 be based on radio frequency analog device novel signal receiver, it is characterised in that: the preposition AGC
Module is the preposition AGC module based on DATT-0218G chip.
3. according to claim 1 be based on radio frequency analog device novel signal receiver, it is characterised in that: the down coversion mould
Block is the down conversion module based on MIXER-MM93MS-13 chip.
4. according to claim 1 be based on radio frequency analog device novel signal receiver, it is characterised in that: the intermediate frequency AGC
Module is the intermediate frequency AGC module based on HMC346 chip.
5. according to claim 1 be based on radio frequency analog device novel signal receiver, it is characterised in that: the intermediate frequency amplification
Intermediate frequency amplifier module of the device based on ERA4-0010-0150 chip.
6. according to claim 1 be based on radio frequency analog device novel signal receiver, it is characterised in that: the intermediate frequency protection
Intermediate frequency coaxial attenuator of the attenuator based on SMAG2-10dB-18G.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821974787.1U CN209728157U (en) | 2018-11-28 | 2018-11-28 | Based on radio frequency analog device novel signal receiver |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821974787.1U CN209728157U (en) | 2018-11-28 | 2018-11-28 | Based on radio frequency analog device novel signal receiver |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258978A (en) * | 2021-04-22 | 2021-08-13 | 中国电子科技集团公司第二十九研究所 | Method for realizing automatic adjustment of dynamic range of broadband radio frequency receiving system |
| CN114024635A (en) * | 2021-11-17 | 2022-02-08 | 南京长峰航天电子科技有限公司 | Wide signal measurement method and device considering signal-to-noise ratio |
-
2018
- 2018-11-28 CN CN201821974787.1U patent/CN209728157U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258978A (en) * | 2021-04-22 | 2021-08-13 | 中国电子科技集团公司第二十九研究所 | Method for realizing automatic adjustment of dynamic range of broadband radio frequency receiving system |
| CN114024635A (en) * | 2021-11-17 | 2022-02-08 | 南京长峰航天电子科技有限公司 | Wide signal measurement method and device considering signal-to-noise ratio |
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