CN207968483U - A kind of two waveband location navigation radio-frequency front-end - Google Patents
A kind of two waveband location navigation radio-frequency front-end Download PDFInfo
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- CN207968483U CN207968483U CN201820332058.XU CN201820332058U CN207968483U CN 207968483 U CN207968483 U CN 207968483U CN 201820332058 U CN201820332058 U CN 201820332058U CN 207968483 U CN207968483 U CN 207968483U
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Abstract
The utility model is related to a kind of two waveband location navigation radio-frequency front-ends, belong to navigator fix and radar control field comprising receiving unit, transmitter unit, frequency source unit and crystal oscillator unit；The output terminal of clock of the crystal oscillator unit connects the input end of clock of the frequency source unit, the corresponding output end of the frequency source unit is respectively connected to the first frequency mixer and quadrature demodulator in the receiving unit, while the BPSK modulators in the corresponding output end access transmitter unit of the frequency source unit；The input terminal of the receiving unit connects antenna；Quadrature demodulator in the receiving unit exports I road signals and the roads Q signal to the respective input of digital signal processing unit；The output end of the digital signal processing unit accesses the BPSK modulators in the transmitter unit, and the output end of the transmitter unit connects antenna.The utility model has the advantages that reducing cost and power consumption, volume is reduced, improves reliability.
Description
Technical field
The utility model is related to a kind of two waveband location navigation radio-frequency front-ends, belong to navigator fix and radar control neck
Domain.
Background technology
Important component of the radio-frequency front-end as radio receiver, to can compatible receiver different-waveband
Signal of communication, it has to be possible to be operated in wider frequency range, and complete the functions such as low noise amplification, automatic growth control.
Current most of receiver radio frequency front ends use super-heterodyne architecture, and by level-one or two-stage mixing and filtering, removal receives in signal
Interference signal and obtain enough gains.Although this structure in gain, sensitivity, AF panel etc. function admirable,
But because of it, there are image interferences, need special intermediate-frequency filter so that it is complicated, it is not easy of integration, and it is connect to increase
The cost and size of receipts machine are not inconsistent with communication station miniaturization, unitized trend.
At this stage, radio-frequency front-end is the important component of radio receiver, currently used super-heterodyne architecture radio frequency
Front end is although functional, but it is complicated, not easy of integration, portability is not high.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of local frequencies that can have both reception and transmitting
And be integrated with monolithic automatic growth control, the low cost of demodulation video amplifier function, low-power consumption two waveband location navigation penetrate
Frequency front end.
In order to solve the above technical problems, the utility model uses following technical solution：
A kind of two waveband location navigation radio-frequency front-end comprising receiving unit, transmitter unit, frequency source unit and crystal oscillator list
Member；The output terminal of clock of the crystal oscillator unit connects the input end of clock of the frequency source unit, the phase of the frequency source unit
Answer the first frequency mixer and quadrature demodulator that output end is respectively connected in the receiving unit, while the phase of the frequency source unit
Output end is answered to access the BPSK modulators in transmitter unit；The input terminal of the receiving unit connects antenna；The receiving unit
In quadrature demodulator output I road signals and the roads Q signal to digital signal processing unit respective input；The digital signal
The output end of processing unit accesses the BPSK modulators in the transmitter unit, and the output end of the transmitter unit connects antenna.
Further, the receiving unit further includes prefilter, low-noise amplifier and image-reject filter；Institute
The input termination antenna of prefilter is stated, output end is mixed through low-noise amplifier, image-reject filter and first successively
Access the input terminal of quadrature demodulator after frequency device, two output ends of the quadrature demodulator are exported as two of receiving unit
End is connected with the roads I of digital signal processing unit and the roads Q input terminal.
Further, the transmitter unit further includes bandpass filter and power amplifier；The BPSK modulators it is defeated
Enter the local oscillator output end that end is separately connected the digital signal output end and frequency source unit of digital signal processing unit；The BPSK
For the output end of modulator successively after bandpass filter and power amplifier, the output end as transmitter unit is connected to antenna.
Further, the frequency source unit includes two power splitters, amplifier and Si4133 frequency sources；The Si4133 frequencies
The input terminal in rate source is connected as the input terminal of frequency source unit with the output end of the crystal oscillator unit, the Si4133 frequencies
There are two output, one of outputs, and the quadrature demodulator of receiving unit is connected to as an output end of frequency source unit in source
Input terminal, another is exported accesses the input terminals of two power splitters after amplifier；Two outputs of two power splitter
Hold as frequency source unit two output ends respectively in the local oscillator input terminal and transmitter unit of frequency mixer in receiving unit
The local oscillator input terminal of BPSK modulators is connected.
Further, the crystal oscillator unit includes crystal oscillating circuit and low-pass filter；The output end of the crystal oscillating circuit passes through
After low-pass filter, the output end as crystal oscillator unit is connected with the input terminal of the frequency source unit.
Further, the quadrature demodulator includes automatic growth control and the video amplifier.
The beneficial effects of the utility model are as follows：
In navigator fix and radar control, the simplifying for miniaturization and scheme and device to radio-frequency front-end requires increasingly
Height, therefore there is this radio-frequency front-end the local frequency that will be received and emit cleverly to be combined and optimized, and connects and transmits/receives in satisfaction
Under the premise of penetrating phase noise and being mixed the indexs such as spuious, reduce local oscillator type, while list is realized using integrated technology
The sophisticated functions such as piece AGC, demodulation video amplifier, the use of this two technologies reduce cost and power consumption, reduce volume, carry
High reliability.
The utility model passes through reasonably combination S i4133 frequency sources, two power splitters, prefilter, low noise amplification
The devices such as device, image-reject filter, the first frequency mixer, bandpass filter, BPSK modulators and power amplifier can will be penetrated
The operating frequency range of frequency front end expands to other frequency ranges, and the utility model can be applied to broader field, meets more
Demand.
Description of the drawings
Fig. 1 is the structural principle block diagram of the utility model；
Fig. 2 is the structural principle block diagram of receiving unit in the utility model；
Fig. 3 is the structural principle block diagram of transmitter unit in the utility model；
Fig. 4 is the structural principle block diagram of frequency source unit in the utility model；
Fig. 5 is the structural principle block diagram of crystal oscillator unit in the utility model.
Specific implementation mode
1 ~ Fig. 5 and specific implementation mode are described in further detail the utility model below in conjunction with the accompanying drawings.
As shown in Fig. 1 ~ Fig. 5, the present embodiment is related to a kind of two waveband location navigation radio-frequency front-end comprising receiving unit,
Transmitter unit, frequency source unit and crystal oscillator unit；Two output ends of the receiving unit are separately connected Digital Signal Processing list
The roads the I input of member and the input of the roads Q, three input terminals are connected respectively to antenna, the first frequency mixer and quadrature demodulator；The transmitting
One output end of unit is connected to antenna, two input terminal connection BPSK modulators and the number from digital signal processing unit
Word signal；The clock output of the input terminal connection crystal oscillator unit of the frequency source unit, three of them output end are separately connected
To the BPSK modulators of the first frequency mixer of receiving unit, quadrature demodulator and transmitter unit；One of the crystal oscillator unit is defeated
Outlet is connected to the clock input of frequency source unit.
The BPSK modulators are bi-phase modulated, and the roads quadrature demodulator Wei Dui I/Q signal carries out quadrature demodulation.
As shown in Fig. 2, the receiving unit includes prefilter, low-noise amplifier, image-reject filter, first
Frequency mixer and quadrature demodulator, the quadrature demodulator contain automatic growth control and the video amplifier；The prefilter is used
Noise signal other than the useful echo-signal for receiving antenna filters out；The low-noise amplifier is amplified to signal is received
Required performance number；The image frequency signal that the image-reject filter is used to dock in the collection of letters number is effectively inhibited；It is described
First frequency mixer is down-converted to required reception intermediate frequency for that will receive signal；The quadrature demodulator is by receiving intermediate frequency signal solution
It is adjusted to the roads I signal and the roads Q signal, is then delivered to digital signal processing unit；The receiving unit is the letter of entire radio-frequency front-end
Number receiving portion.
As shown in figure 3, the transmitter unit includes BPSK modulators, bandpass filter and power amplifier；The BPSK
Modulator is used for the digital signal modulated of sending digital signal processing unit to required rf frequency；The bandpass filter
For being filtered to the radiofrequency signal modulated, to filter out the noise signal that modulation generates；The power amplifier is used for will
The radiofrequency signal modulated is amplified to required performance number, is then delivered to antenna；The transmitter unit is entire radio-frequency front-end
Signal transmission unit point.
As shown in figure 4, the frequency source unit includes two power splitters, amplifier and Si4133 frequency sources；The Si4133
The clock signal that frequency source sends crystal oscillator unit exports two-way local oscillation signal as clock is referred to by way of locking phase, point
Not Wei a local oscillator and two local oscillators, two local oscillators are directly sent to local oscillation signal of the receiving unit as quadrature demodulation；The amplifier is used
In a local oscillation signal to be amplified to required performance number；Two power splitter is used to amplified local oscillation signal work(being divided into two
Road is sent to receiving unit as down coversion local oscillation signal all the way, and another way is sent to local oscillator of the transmitter unit as BPSK modulators
Signal；The frequency source unit is that the local oscillation signal of entire radio-frequency front-end generates part.
As shown in figure 5, the crystal oscillator unit includes crystal oscillating circuit and low-pass filter；The crystal oscillating circuit is for generating institute
The clock signal needed；The low-pass filter be used for by clock signal harmonic signal and noise signal effectively inhibited,
Frequency source unit is then delivered to be used as with reference to clock；The crystal oscillator unit is the clock signal generating portion of entire radio-frequency front-end.
In the present embodiment, reception signal is S-band radiofrequency signal, and transmitting signal is L-band radiofrequency signal, in receiving unit
Orthogonal demodulation circuit using the multifunction device AD8347 for being integrated with automatic growth control, demodulation video amplifier, hair
Modulator AD8346 of the BPSK modulation circuits in unit using ADI companies is penetrated, receiving unit is that a down coversion adds just
It is a BPSK modulation, the final location navigation function of realizing dual band frequencies range to hand over demodulation, transmitter unit.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that：
It can still modify to the technical solution recorded in previous embodiment, or be equal to which part technical characteristic
It replaces；And these modifications or replacements, the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution
Spirit and scope.
Claims (9)
1. a kind of two waveband location navigation radio-frequency front-end, it is characterised in that：It includes receiving unit, transmitter unit, frequency source list
Member and crystal oscillator unit；The output terminal of clock of the crystal oscillator unit connects the input end of clock of the frequency source unit, the frequency
The corresponding output end of source unit is respectively connected to the first frequency mixer and quadrature demodulator in the receiving unit, while the frequency
BPSK modulators in the corresponding output end access transmitter unit of source unit；The input terminal of the receiving unit connects antenna；Institute
It states the quadrature demodulator in receiving unit and exports I road signals and the roads Q signal to the respective input of digital signal processing unit；Institute
The output end for stating digital signal processing unit accesses BPSK modulators in the transmitter unit, the output end of the transmitter unit
Connect antenna.
2. a kind of two waveband location navigation radio-frequency front-end according to claim 1, it is characterised in that：The receiving unit is also
Including prefilter, low-noise amplifier and image-reject filter；The input of the prefilter terminates antenna, defeated
Outlet accesses the input terminal of quadrature demodulator, institute after low-noise amplifier, image-reject filter and the first frequency mixer successively
Two output ends of quadrature demodulator are stated as two output ends of receiving unit and the roads I and the roads Q of digital signal processing unit
Input terminal is connected.
3. a kind of two waveband location navigation radio-frequency front-end according to claim 1 or 2, it is characterised in that：The transmitting is single
Member further includes bandpass filter and power amplifier；The input terminal of the BPSK modulators is separately connected digital signal processing unit
Digital signal output end and frequency source unit local oscillator output end；The output end of the BPSK modulators is successively through bandpass filtering
After device and power amplifier, the output end as transmitter unit is connected to antenna.
4. a kind of two waveband location navigation radio-frequency front-end according to claim 1 or 2, it is characterised in that：The frequency source
Unit includes two power splitters, amplifier and Si4133 frequency sources；The input terminal of the Si4133 frequency sources is as frequency source unit
Input terminal be connected with the output end of the crystal oscillator unit, there are two output, one of outputs for the Si4133 frequency sources
An output end as frequency source unit is connected to the input terminal of the quadrature demodulator of receiving unit, another output is passed through
The input terminal of two power splitters is accessed after amplifier；Two outputs of two output ends of two power splitter as frequency source unit
End is connected with the local oscillator input terminal of BPSK modulators in the local oscillator input terminal of frequency mixer in receiving unit and transmitter unit respectively.
5. a kind of two waveband location navigation radio-frequency front-end according to claim 1 or 2, it is characterised in that：The crystal oscillator list
Member includes crystal oscillating circuit and low-pass filter；After the low-pass filtered device of output end of the crystal oscillating circuit, as crystal oscillator unit
Output end is connected with the input terminal of the frequency source unit.
6. a kind of two waveband location navigation radio-frequency front-end according to claim 2, it is characterised in that：The quadrature demodulator
Including automatic growth control and the video amplifier.
7. a kind of two waveband location navigation radio-frequency front-end according to claim 3, it is characterised in that：The frequency source unit
Including two power splitters, amplifier and Si4133 frequency sources；The input terminal of the Si4133 frequency sources is as the defeated of frequency source unit
Enter end with the output end of the crystal oscillator unit to be connected, there are two output, one of output conducts for the Si4133 frequency sources
One output end of frequency source unit is connected to the input terminal of the quadrature demodulator of receiving unit, another output is by amplification
The input terminal of two power splitters is accessed after device；Two output ends point of two output ends of two power splitter as frequency source unit
It is not connected with the local oscillator input terminal of BPSK modulators in the local oscillator input terminal of frequency mixer in receiving unit and transmitter unit.
8. a kind of two waveband location navigation radio-frequency front-end according to claim 3, it is characterised in that：The crystal oscillator unit packet
Crystal oscillator circuit and low-pass filter；After the low-pass filtered device of output end of the crystal oscillating circuit, the output as crystal oscillator unit
End is connected with the input terminal of the frequency source unit.
9. a kind of two waveband location navigation radio-frequency front-end according to claim 7, it is characterised in that：The crystal oscillator unit packet
Crystal oscillator circuit and low-pass filter；After the low-pass filtered device of output end of the crystal oscillating circuit, the output as crystal oscillator unit
End is connected with the input terminal of the frequency source unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820332058.XU CN207968483U (en) | 2018-03-12 | 2018-03-12 | A kind of two waveband location navigation radio-frequency front-end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820332058.XU CN207968483U (en) | 2018-03-12 | 2018-03-12 | A kind of two waveband location navigation radio-frequency front-end |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207968483U true CN207968483U (en) | 2018-10-12 |
Family
ID=63742083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820332058.XU Active CN207968483U (en) | 2018-03-12 | 2018-03-12 | A kind of two waveband location navigation radio-frequency front-end |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207968483U (en) |
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2018
- 2018-03-12 CN CN201820332058.XU patent/CN207968483U/en active Active
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