CN205353369U - Miniaturized high performance beiDou navigation satellite system receiving module - Google Patents
Miniaturized high performance beiDou navigation satellite system receiving module Download PDFInfo
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- CN205353369U CN205353369U CN201520836742.8U CN201520836742U CN205353369U CN 205353369 U CN205353369 U CN 205353369U CN 201520836742 U CN201520836742 U CN 201520836742U CN 205353369 U CN205353369 U CN 205353369U
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- receiving module
- beidou navigation
- filter
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- satellite system
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Abstract
The utility model relates to a microwave communication device specifically is miniaturized high performance beiDou navigation satellite system receiving module, low -noise amplifier, tracking filter, first detector, this vibration source, channel selection filter including fixed gain, low -noise amplifier, tracking filter, first detector, channel selection filter connect gradually, and this vibration source is connected with the first detector. The utility model provides a miniaturized high performance beiDou navigation satellite system receiving module improves receiving performance, realizes RF chips and receiving module industrialization, reduces the module cost, has solved big dipper PCS -RX chip bandwidth, the undershoot decreases and low squareness factor core technology, for big dipper market provides the receiving module of a plurality of varieties, has solved receive radio frequency module key technology, improves the positioning accuracy of receiver, can give high -tech weapon and provide the support of navigational positioning information. Reduce in the aspect of the technique research and development with external gap, further reduce the cost of homemade core components and parts.
Description
Technical field
This utility model relates to a kind of microwave communication device, is specially miniaturisation high-performance Beidou navigation receiver module.
Background technology
The Big Dipper chip of China's independent intellectual property right has been enter into practical stage, and a collection of enterprise of good standing of China has grasped Beidou navigation independent core technology, and the core receiver module with Chinese independent intellectual property right also will enter practical stage with Big Dipper chip.Current domestic Big Dipper chip performance has reached the level of international third generation GNSS chip.
In navigation system receiver module, in order to mate reception bandwidth, it is typically designed to band filter.Simultaneously taking account of group delay time, input and output Insertion Loss and bandwidth, the progression of the Chebyshev filter generally adopted is relatively more, and band interpolation is relatively larger, it is impossible to meet parameter request.
Current existing product problem concentrates on the linearity of frequency mixer affects noise coefficient and the frequency bandwidth of receiver module.Particularly in the radio frequency chip of application SAW filter, the difficult point of receiver is sensitivity≤-160dBm, noise power≤-120dBm, reception bandwidth 10MHz ± 1MHz.Main cause is the performance of the transconductance stage circuit whole receiver module of decision at parts frequency mixer self.In the linearity, the non-linear phenomena of frequency mixer mutual conductance pipe mostlys come from the square-law characteristic of transconductance stage transistor, and in noise, the noise of frequency mixer transconductance stage mostlys come from transistor thermal noise.
Utility model content
For above-mentioned technical problem, this utility model provides a kind of miniaturisation high-performance Beidou navigation receiver module.
Concrete technical scheme is:
Miniaturisation high-performance Beidou navigation receiver module, including the low-noise amplifier of fixed gain, tracking filter, frequency mixer, local vibration source, channel selection filter；Low-noise amplifier, tracking filter, frequency mixer, channel selection filter are sequentially connected with, and local vibration source is connected with frequency mixer.
The miniaturisation high-performance Beidou navigation receiver module that this utility model provides, adopts superheterodyne reception technology to suppress the structure of interference in conjunction with mirror image, it is achieved parameter index is: sensitivity≤-160dBm, frequency range 2.475GHz ± 20MHz, noise coefficient≤2.5dB.Down coversion adds the circuit design mode of SAW filter device, reduces the nearly 20dBm of noise power, makes receiving ability improve 15dBm.Optimizing SAW filter, the index when realizing batch production reaches: bandwidth 10MHz ± 1MHz, differential loss≤0.5dB, time delay≤500ns.The receiver module coordinating high stable local oscillator can realize bandwidth self-adaption requirement, meets market performance index request.
Realize the receptivity of muting sensitivity, it is necessary to after the signal received is amplified 100dB-200dB, just can carry out frequency-conversion processing.But the amplifier in same frequency band is not provided that so high gain, otherwise can bring more serious stability to whole system, so adopting superhet receiver can required high-gain be shared in high frequency, intermediate frequency and three frequency bands of base band.Receiver module is combined by different units circuit module, but the element circuit module of each several part can't be ideal linear characteristic, mixer module is equally without the circuit module being an ideal linearity, in order to eradicate the interference signal in frequency band, the wave filter of low reactance-resistance ratio is adopted to carry out filtering clutter interference signal.
The miniaturisation high-performance Beidou navigation receiver module that this utility model provides, adopts a kind of relatively new combinational circuit form, and traditional elliptic function filter adds the design form of coupling bandpass envelope.By network transformation it is recognised that for band filter, its input, outfan are generally J, K changer, it is achieved method a lot, such as L network, pin network etc..The low pass envelop forms adopted, not only compensate for pure elliptic function filter far-end and drops to mild shortcoming, also eliminates the components and parts trueness error accumulation impact on wave filter overall waveform.
Adopting LC wave filter to combine with SAW filter is that receiver module solves bandwidth difficult point and the important means of interference signal.LC wave filter achieves the performance of the big broadband of band filter, little Insertion Loss, low standing wave, and easily realize miniaturization structure, the narrow-band technologies adopting SAW filter compensate for the deficiency of LC wave filter, substantially increase the performance of receiver module, particularly bandwidth arbitrarily can be mated from 1MHz-60MHz, and delay time is less than 200ns.
The miniaturisation high-performance Beidou navigation receiver module that this utility model provides, improve receptivity, realize radio frequency chip and receiver module industrialization, reduce module cost, solve Big Dipper SAW filter chip bandwidth, undershoot undermines low squareness factor core technology, provides the receiver module of multiple kinds for Big Dipper market, solves reception radio-frequency module key technology, improve the positioning precision of receiver, it is possible to give advanced technology weapon and navigator fix Informational support is provided.Reduce in technical research and external gap, reduce the cost of domestic core component further.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
Accompanying drawings detailed description of the invention of the present utility model.
As it is shown in figure 1, miniaturisation high-performance Beidou navigation receiver module, including the low-noise amplifier 1 of fixed gain, tracking filter 2, frequency mixer 3, local vibration source 4, channel selection filter 5；Low-noise amplifier 1, tracking filter 2, frequency mixer 3, channel selection filter 5 are sequentially connected with, and local vibration source 4 is connected with frequency mixer 3.
Tracking filter 2 adopts LC band filter, channel selection filter 5 to adopt core devices SAW filter group, it is achieved the reception signal of coupling different bandwidth.Frequency mixer 3 adopts the wave filter of low reactance-resistance ratio to carry out filtering clutter interference signal.
Claims (1)
1. miniaturisation high-performance Beidou navigation receiver module, it is characterised in that: include the low-noise amplifier of fixed gain, tracking filter, frequency mixer, local vibration source, channel selection filter；Low-noise amplifier, tracking filter, frequency mixer, channel selection filter are sequentially connected with, and local vibration source is connected with frequency mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520836742.8U CN205353369U (en) | 2015-10-27 | 2015-10-27 | Miniaturized high performance beiDou navigation satellite system receiving module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520836742.8U CN205353369U (en) | 2015-10-27 | 2015-10-27 | Miniaturized high performance beiDou navigation satellite system receiving module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205353369U true CN205353369U (en) | 2016-06-29 |
Family
ID=56167132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520836742.8U Expired - Fee Related CN205353369U (en) | 2015-10-27 | 2015-10-27 | Miniaturized high performance beiDou navigation satellite system receiving module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205353369U (en) |
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2015
- 2015-10-27 CN CN201520836742.8U patent/CN205353369U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160629 Termination date: 20201027 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |