CN203217080U - Radio frequency front end of broadband satellite navigation receiver - Google Patents
Radio frequency front end of broadband satellite navigation receiver Download PDFInfo
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- CN203217080U CN203217080U CN 201220645384 CN201220645384U CN203217080U CN 203217080 U CN203217080 U CN 203217080U CN 201220645384 CN201220645384 CN 201220645384 CN 201220645384 U CN201220645384 U CN 201220645384U CN 203217080 U CN203217080 U CN 203217080U
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Abstract
A radio frequency front end of a broadband satellite navigation receiver comprises the following components: a broadband microstrip antenna, three independent radio frequency channels, a combiner and a power divider; wherein: the broadband microstrip antenna is used for receiving satellite signals of GPS, GLNASS and Beidou2 navigation systems; each radio frequency channel comprises a low-noise amplifier and a wave filter which respectively process three satellite signals received by the broadband microstrip antenna; the combiner is used for combining carrier signals of three radio frequency channels; and the power divider is used for performing signal energy power division on the signal output from the combiner. The three radio frequency channels are independent from each other and can be randomly combined for operating. Furthermore under a server condition that one radio frequency channel operates normally, the radio frequency front end of the satellite receiver can operate normally, thereby improving equipment reliability of the broadband satellite navigation receiver in a severe environment.
Description
Technical field
The utility model belongs to the satellite navigation technical field, relates to a kind of broadband satellite receiver radio-frequency front-end.
Background technology
At present, the worldwide navigation positioning system mainly comprises the GPS (GPS) of the U.S., " Big Dipper 2 " global position system of Muscovite " GLNASS " Global Navigation System and Chinese independent development.For accuracy and the reliability that improves navigator fix, need fully utilize existing satnav resource simultaneously, satellite navigation receiver is the navigation message information of compatible multiple global position system simultaneously, accuracy and the reliability of navigator fix terminal can be improved greatly, and the equipment viability under rugged surroundings can be improved.Thereby the terminal of navigator had higher requirement, and radio-frequency (RF) front-end circuit has directly determined navigation and the bearing accuracy of navigation terminal as the critical component in the navigation neceiver, thus the prospect that its market uses directly determined.
The utility model content
The purpose of this utility model is to provide a kind of satellite navigation receiver radio-frequency front-end that can receive three kinds of satellite navigation signals simultaneously.
According to the purpose of this utility model, broadband satellite navigation receiver radio-frequency front-end comprises wideband microstrip antenna, three separate radio-frequency channels, combiner and power splitters, wherein:
Described wideband microstrip antenna is used for receiving the satellite-signal of GPS, GLNASS and 2 three kinds of navigational system of the Big Dipper;
Described each radio-frequency channel includes low noise amplifier and wave filter, and three road satellite-signals that wideband microstrip antenna is received are handled respectively;
It is a place that described combiner is used for the carrier signal of three radio-frequency channels is compiled;
Described power splitter is used for the signal of combiner output is carried out signal energy merit branch.
Broadband satellite receiver radio-frequency (RF) front-end circuit is the multiple navigation message information of compatible with GPS, GLNASS and " Big Dipper " navigational system simultaneously.Broadband satellite receiver radio-frequency (RF) front-end circuit has three separate radio-frequency channels, be connected to three novel laminated compound wideband microstrip antennas, each wideband microstrip antenna power lobe width can cover 120 ° of scopes, satisfies 360 ° of omnibearing reception signals coverings on carrier.Three radio-frequency channels are separate, but combination in any work, and guaranteeing that the satellite receiver radio-frequency front-end just can be working properly under passage mal-condition working properly, therefore improved the equipment dependability of broadband satellite receiver under rugged surroundings.
Broadband satellite receiver radio-frequency (RF) front-end circuit is the multiple navigation message information of compatible with GPS, GNASS and " Big Dipper 2 " navigational system simultaneously.The advantage of this radio-frequency front-end is:
1) broadband satellite receiver radio-frequency (RF) front-end circuit has three separate radio-frequency channels, be connected to three wideband microstrip antennas, each wideband microstrip antenna power lobe width can cover 120 ° of scopes, satisfies 360 ° of omnibearing reception signals coverings on carrier.
2) three radio-frequency channels of broadband satellite receiver radio-frequency front-end are separate, but combination in any work, and guaranteeing under passage mal-condition working properly, the satellite receiver radio-frequency front-end just can be working properly, therefore improved the equipment dependability of broadband satellite receiver under rugged surroundings.
4) adopt broadband low noise amplifier and broadband bandpass filter, working band covers GPS, GNASS and a plurality of frequency bands of " Big Dipper 2 " navigational system, and has that high reliability, high stability, ultra-low noise coefficient, band are outer to be suppressed good and characteristics such as antijamming capability is strong.
5) adopt the mode of closing road and merit branch, adopt the mode that changes ∏ type attenuator damping capacity when closing the road, carry out the reasonable equilibrium of each channel gain, solved the gain that the radio-frequency channel hardware differences brings and noise figure is different and then Signal-to-Noise behind the road is closed in influence problem, make that the Signal-to-Noise that closes Lu Housan passage is identical, guaranteed that three passages can work alone, carry out the merit branch on this basis, isolate by decay again and optimize the port standing wave, can guarantee that carrying out follow-up passage for 3 navigational system simultaneously handles.
Description of drawings
Fig. 1 is broadband satellite receiver radio-frequency front-end composition frame chart;
Fig. 2 is the wideband microstrip antenna of broadband satellite receiver radio-frequency front-end;
Fig. 3 is broadband low noise amplifier and the wave filter of broadband satellite receiver radio-frequency front-end;
Fig. 4 closes road and merit parallel circuit for broadband satellite receiver radio-frequency front-end.
Embodiment
The wideband telemetry transmitter that the utility model proposes is described in detail as follows in conjunction with enforcement and accompanying drawing:
The composition frame chart of broadband satellite receiver radio-frequency front-end as shown in Figure 1, it is made of wideband microstrip antenna, low noise amplifier, wave filter, combiner and power splitter.Broadband satellite receiver radio-frequency (RF) front-end circuit is the multiple carrier signal of compatible with GPS, GNASS and " Big Dipper 2 " navigational system simultaneously.Broadband satellite receiver radio-frequency (RF) front-end circuit has three separate input radio frequency passages, working band covers 1575.42Hz ± 2MHz (GPS), 1602MHz ± 7MHz (GLNASS) and 1268.42MHz ± 7MHz (Big Dipper 2), each radio-frequency channel connects an identical wideband microstrip antenna separately simultaneously, above-mentioned three navigational system of the same covering of frequency band, each all channel antenna can cover 120 ° of scopes, satisfies 360 ° of omnibearing reception signals coverings on carrier.Three radio-frequency channels are separate, but combination in any work, and guaranteeing that the satellite receiver radio-frequency front-end just can be working properly under passage mal-condition working properly, therefore improved the equipment dependability of broadband satellite receiver under rugged surroundings.
The concrete enforcement of each several part is described in detail as follows:
The structure of wideband microstrip antenna as shown in Figure 2, wherein two antennas are coaxial, it is the 2.4GHz antenna that radiation patch adopts circular upper strata paster, the middle layer is the 1.55GHz-1.61GHz antenna, lower floor is ground plate.In order to have better circular polarization characteristics, each antenna carries out feed by 2 feedback points respectively.Wherein, the specific inductive capacity of top dielectric is 2.2, and thickness is 2.4mm (3 layers of thick medium of 0.8mm are formed by stacking), and the specific inductive capacity of layer dielectric is 3.2, and thickness is 6.4mm (4 layers of thick medium stack of 1.6mm).Provided the tomograph of antenna among Fig. 3, the rectangular strip on the circular patch can be finely tuned the resonance frequency of antenna.Antenna comprises 7 layers of medium altogether, is that the metallic screw of 2mm is fixed by diameter.The lobe width of this antenna possesses the broad beam characteristic, and in working band, 3dB power lobe width reaches 120 ° broad beam characteristic.Return loss is less than-15dB in working frequency range for this antenna, and gain is greater than 3dB, and zenith axis has good electrical properties and radiation characteristic than less than 3dB.
2. the circuit structure of wideband low noise amplifier and wave filter as shown in Figure 3.Low noise amplifier adopts the E-pHEMT FETs type ATF-54143 field effect transistor of AVAGO company, and this tube core has the ultra-low noise characteristic, and noise figure can be low to moderate 0.5dB.In circuit design, adopt LC device and the compound matching way of microstrip line, and in drain electrode employing resistive degeneration mode, finally make the noise figure of low noise amplifier can reach 0.7dB, stability factor is greater than 2.0, gain reaches 15dB, and the port standing wave is less than 2.0, and excellent low noise amplifier performance provides reliable guarantee for the high s/n ratio of whole receiving radio frequency front end.Wave filter adopts Hi-pass filter HFCN-1200 and the low-pass filter LFCN-1700 of Mini company, the two forms the bandpass filter of 1.2GHz-1.7GHz, covered the working band of three navigational system, simultaneously also improve the inhibition ability of receiving front-end to complicated undesired signal, improved the antijamming capability of whole receiving front-end.
3. close the particular circuit configurations of road and merit parallel circuit as shown in Figure 4.Combiner adopts the SCN-3-16 model of Mini company, and frequency band covers 900MHz, meets the technical requirement of receiving front-end.Adopt the mode that changes ∏ type attenuator damping capacity when closing the road, carry out the reasonable equilibrium of each channel gain, gain and noise figure difference that the radio-frequency channel hardware differences is brought have been solved, and then the problem of Signal-to-Noise behind the road is closed in influence, the Signal-to-Noise that has guaranteed to close Lu Housan passage is identical, guarantee that three receiving cables have extremely strong work independence, closing that the road compiles the signal of three passages is a place, adopt the SCN-3-16 of Mini company to carry out signal energy merit branch again, isolate by decay at last and optimize the port standing wave, can carry out follow-up passage for three navigational system simultaneously and handle.
Claims (3)
1. a broadband satellite navigation receiver radio-frequency front-end is characterized in that, comprises wideband microstrip antenna, three separate radio-frequency channels, combiner and power splitters, wherein:
Described wideband microstrip antenna is used for receiving the satellite-signal of GPS, GLNASS and 2 three kinds of navigational system of the Big Dipper;
Described each radio-frequency channel includes low noise amplifier and wave filter, and three road satellite-signals that wideband microstrip antenna is received are handled respectively;
It is a place that described combiner is used for the carrier signal of three radio-frequency channels is compiled;
Described power splitter is used for the signal of combiner output is carried out signal energy merit branch.
2. broadband satellite navigation receiver radio-frequency front-end as claimed in claim 1 is characterized in that, described low noise amplifier is E-pHEMT FETs type ATF-54143 field effect transistor.
3. broadband satellite navigation receiver radio-frequency front-end as claimed in claim 1 or 2 is characterized in that, the bandpass filter of the 1.2GHz-1.7GHz that described wave filter is made up of Hi-pass filter HFCN-1200 and low-pass filter LFCN-1700.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220645384 CN203217080U (en) | 2012-11-30 | 2012-11-30 | Radio frequency front end of broadband satellite navigation receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220645384 CN203217080U (en) | 2012-11-30 | 2012-11-30 | Radio frequency front end of broadband satellite navigation receiver |
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| CN203217080U true CN203217080U (en) | 2013-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220645384 Expired - Lifetime CN203217080U (en) | 2012-11-30 | 2012-11-30 | Radio frequency front end of broadband satellite navigation receiver |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103700943A (en) * | 2013-12-13 | 2014-04-02 | 武汉虹信通信技术有限责任公司 | Device for supporting multi-band frequency beamforming |
| CN104655949A (en) * | 2013-11-21 | 2015-05-27 | 鸿富锦精密电子(天津)有限公司 | Anechoic chamber and testing method of electromagnetic interference |
| CN104682985A (en) * | 2013-11-28 | 2015-06-03 | 郑州威科姆科技股份有限公司 | GNSS (Global Navigation Satellite System) multi-mode multiplexer module and multi-mode radio frequency receiving and transmitting system |
| CN105372683A (en) * | 2015-03-31 | 2016-03-02 | 中国科学院上海技术物理研究所 | Real-time signal receiving and processing system of public frequency points of Beidou navigation satellite system and GPS |
| CN105403898A (en) * | 2015-12-03 | 2016-03-16 | 天津七六四通信导航技术有限公司 | Radio frequency receiving channel circuit for realizing anti-interference antenna of satellite navigation and method |
| CN109752732A (en) * | 2019-01-17 | 2019-05-14 | 上海华测导航技术股份有限公司 | A kind of circuit structure that GNSS height navigation frequency band is handled respectively |
| CN112367093A (en) * | 2021-01-13 | 2021-02-12 | 成都天锐星通科技有限公司 | Phased array receiving radio frequency network and system |
-
2012
- 2012-11-30 CN CN 201220645384 patent/CN203217080U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655949A (en) * | 2013-11-21 | 2015-05-27 | 鸿富锦精密电子(天津)有限公司 | Anechoic chamber and testing method of electromagnetic interference |
| CN104682985A (en) * | 2013-11-28 | 2015-06-03 | 郑州威科姆科技股份有限公司 | GNSS (Global Navigation Satellite System) multi-mode multiplexer module and multi-mode radio frequency receiving and transmitting system |
| CN104682985B (en) * | 2013-11-28 | 2017-11-21 | 郑州威科姆科技股份有限公司 | GNSS multimode multi-function device modules and multi-mode radio frequency receive-transmit system |
| CN103700943A (en) * | 2013-12-13 | 2014-04-02 | 武汉虹信通信技术有限责任公司 | Device for supporting multi-band frequency beamforming |
| CN103700943B (en) * | 2013-12-13 | 2016-04-27 | 武汉虹信通信技术有限责任公司 | A kind of device supporting multiband beam shaping |
| CN105372683A (en) * | 2015-03-31 | 2016-03-02 | 中国科学院上海技术物理研究所 | Real-time signal receiving and processing system of public frequency points of Beidou navigation satellite system and GPS |
| CN105403898A (en) * | 2015-12-03 | 2016-03-16 | 天津七六四通信导航技术有限公司 | Radio frequency receiving channel circuit for realizing anti-interference antenna of satellite navigation and method |
| CN105403898B (en) * | 2015-12-03 | 2017-12-19 | 天津七六四通信导航技术有限公司 | A kind of radio frequency reception channel circuit for realizing anti-interference antenna of satellite navigation |
| CN109752732A (en) * | 2019-01-17 | 2019-05-14 | 上海华测导航技术股份有限公司 | A kind of circuit structure that GNSS height navigation frequency band is handled respectively |
| CN112367093A (en) * | 2021-01-13 | 2021-02-12 | 成都天锐星通科技有限公司 | Phased array receiving radio frequency network and system |
| CN112367093B (en) * | 2021-01-13 | 2021-04-02 | 成都天锐星通科技有限公司 | Phased array receiving radio frequency network and system |
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| CX01 | Expiry of patent term |
Granted publication date: 20130925 |