CN201408842Y - Double-frequency active receiving antenna of GPS and No.1 beidou system - Google Patents
Double-frequency active receiving antenna of GPS and No.1 beidou system Download PDFInfo
- Publication number
- CN201408842Y CN201408842Y CN2009200458476U CN200920045847U CN201408842Y CN 201408842 Y CN201408842 Y CN 201408842Y CN 2009200458476 U CN2009200458476 U CN 2009200458476U CN 200920045847 U CN200920045847 U CN 200920045847U CN 201408842 Y CN201408842 Y CN 201408842Y
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- gps
- amplifier
- big dipper
- noise amplifier
- low noise
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Abstract
The utility model discloses a double-frequency active receiving antenna of GPS and No.1 beidou system; a GPS receiving antenna and a No.1 beidou receiving antenna are arranged on the upper surface ofa bottom plate, and a shielding shell and a shielding cover are arranged on the lower surface of the bottom plate, a circuit board is arranged in an electromagnetic shielding space formed by the shielding shell and the shielding cover, the No.1 beidou receiving antenna and the GPS receiving antenna are electrically connected with a No.1 beidou low-noise amplifier and a GPS low-noise amplifier respectively, the output ends of the No.1 beidou low-noise amplifier and the GPS low-noise amplifier are connected with a combiner, and the output end of the combiner is electrically connected with a radio frequency cable. In the No.1 beidou low-noise amplifier and the GPS low-noise amplifier, a high linearity amplifier and a high selectivity filter are used, thereby improving the selectivity and blocking resistance of the whole active antenna; the antenna, the low-noise amplifier and the shielding shell are directly fixed on the bottom plate by screws, thereby reducing the assembly working load,improving the assembly efficiency of the active antenna and reducing the cost of batch production.
Description
Technical field
The utility model relates to a kind of reception antenna, is a kind of GPS and a dual frequency active reception antenna of the Big Dipper in a kind of satellite navigation and time service field specifically.
Background technology
" No. one, the Big Dipper " system is the satellite navigation system of China's independent development, GPS is a satellite navigation system of being used widely in the whole world, these two systems can realize location, navigation and high accuracy time service, and its receiver all has a large amount of application in industries such as communication, navigation, electric power, traffic.Dual mode receiver of the GPS and the Big Dipper can receive the signal of these two satellite navigation systems simultaneously, and two systems backup each other, and has improved availability, the reliability of location, navigation and time service greatly.Dual frequency active antenna of the GPS and the Big Dipper is the important component part of a GPS and a dual mode receiver of the Big Dipper.When dual mode receiver is applied to mobile communication base station, radio and television transmitting station, power plant and transformer station etc. and has the environment of strong electromagnetic radiation, the ELECTROMAGNETIC RADIATION SIGNATURE of surrounding devices may enter receiver by antenna and low noise amplifier, reduce location and time service precision, even the obstruction low noise amplifier, make the whole receiver can't operate as normal.And be connected with cable between the antenna of existing dual mode receiver and the low noise amplifier, production cost is higher, and the assembling more complicated, thereby causes the efficient of assembling not high.
Summary of the invention
Goal of the invention: the purpose of this utility model is in the environment with strong electromagnetic radiation, the problem that low noise amplifier blocks appears in the GPS and Big Dipper dual mode receiver easily, provides the antijamming GPS of a kind of high selectivity and the Big Dipper double frequency low noise amplifier
Technical scheme: dual frequency active reception antenna of a kind of GPS and the Big Dipper, comprise base plate, reception antenna of the Big Dipper, the GPS reception antenna, shielding case, screening cover, circuit board and radio frequency cable and be located at low noise amplifier of the Big Dipper and GPS low noise amplifier on the circuit board, upper surface at base plate is provided with GPS reception antenna and reception antenna of the Big Dipper, lower surface at base plate is provided with shielding case and screening cover, in the electromagnetic shielding space of shielding case and screening cover formation, be provided with circuit board, reception antenna of the Big Dipper and GPS reception antenna respectively with low noise amplifier of the Big Dipper, the GPS low noise amplifier is electrically connected, the output of low noise amplifier of the Big Dipper and GPS low noise amplifier is connected with mixer, and the output of mixer is electrically connected radio frequency cable.
Wherein, low noise amplifier of the described Big Dipper is a casacade multi-amplifier, comprise the amplifier of low-loss band-pass filter, the first order Big Dipper, narrow band filter, amplifier of the second level Big Dipper, amplifier of the third level Big Dipper and the band pass filter that are electrically connected successively, multiple filter filtering band is outer to be disturbed and noise, has improved the selectivity and the block resistance of whole active antenna.
Wherein, amplifier of the described first order Big Dipper be 2492MHz low noise, high linearity amplifier.
Wherein, described GPS low noise amplifier comprises GPS band pass filter, first order GPS amplifier, GPS band pass filter, second level GPS amplifier, third level GPS amplifier and the GPS band pass filter that is electrically connected successively.
Wherein, described first order GPS amplifier be the GPS frequency low noise, high linearity amplifier.
Wherein, reception antenna of the described Big Dipper and GPS reception antenna are the microstrip antenna that utilizes the probe output signal, utilize probe to be electrically connected with the low noise amplifier input, have saved radio frequency and have connected itself and cable, have reduced cost.
Beneficial effect: when (1) the utility model uses in mobile communication base station, radio and television transmitting station, power plant and transformer station etc. have the environment of strong electromagnetic radiation, because the utility model is in low noise amplifier of the Big Dipper and GPS low noise amplifier, adopt outer interference of multiple filter filtering band and noise, improved the selectivity of whole active antenna.In low noise amplifier, the first order amplifier of noise bandwidth broad uses the high linearity amplifier, insert narrow band filter filtering out-of-band noise at its output simultaneously, reduce the total noise power that is input to the second level and third level amplifier, improved the block resistance of whole active antenna.(2) antenna, low noise amplifier and shielding case directly are screwed on base plate, have reduced the assembly work amount.Save radio frequency stube cable and connector between antenna and low noise amplifier, improve the active antenna efficiency of assembling, reduce the low-cost configuration form of producing in batches.(3) antenna directly is connected by probe with low noise amplifier, and the direct welding cable of output has been saved at least three radio frequencies and connected itself and cable; And base plate, shielding case and screening cover all can adopt the die stamping moulding, have reduced cost.
Description of drawings
Fig. 1 is a theory diagram of the present utility model.
Fig. 2 is a structural representation of the present utility model.
Fig. 3 is the upward view of Fig. 2.
Fig. 4 is the vertical view of Fig. 2.
Embodiment:
Below in conjunction with accompanying drawing the utility model is done further explanation.
Shown in Fig. 1,2,3 and 4, dual frequency active reception antenna of a kind of GPS of the present utility model and the Big Dipper comprises base plate 1, reception antenna 2 of the Big Dipper, GPS reception antenna 3, shielding case 4, screening cover 5, circuit board 6 and radio frequency cable 7 and is located at low noise amplifier 8 of the Big Dipper and GPS low noise amplifier 9 on the circuit board 6.Upper surface at the base plate 1 of aluminum sets gradually GPS reception antenna 3 and reception antenna 2 of the Big Dipper, and reception antenna 2 of the GPS reception antenna 3 and the Big Dipper all adopts little band plate aerial, also can utilize the microstrip antenna of probe output signal for other.Reception antenna 2 of the GPS reception antenna 3 and the Big Dipper is screwed the upper surface at base plate 1, base plate 1 is with the measure-alike of reception antenna 2 of the Big Dipper, GPS reception antenna 3 or be slightly larger than microstrip antenna, the thickness of base plate 1 generally is not less than 2 millimeters, so that attack the screw hole that usefulness is installed on base plate 1.Lower surface at base plate 1 is provided with shielding case 4 and screening cover 5, is provided with circuit board 6 in the electromagnetic shielding space of shielding case 4 and screening cover 5 formations.Circuit board 6 is fixed on the inner surface of shielding case 4, and shielding case 4 and circuit board 6 are screwed on the lower surface of base plate 1.Low noise amplifier 8 of the Big Dipper and GPS low noise amplifier 9 are screwed on circuit board 6, then circuit board 6 again screw on shielding case 4 and base plate 1, improved installation effectiveness, low noise amplifier stability, reduced the influence of low noise simultaneously antenna pattern.
Probe on reception antenna 2 of the described Big Dipper directly is connected the input of a low noise amplifier 8 of the Big Dipper; Probe on the described GPS reception antenna 3 directly is connected the input of GPS low noise amplifier 9.
Low noise amplifier 8 of the described Big Dipper, GPS low noise amplifier 9 all adopt casacade multi-amplifier.
Low noise amplifier 8 of the described Big Dipper comprises amplifier of low-loss band-pass filter, the first order Big Dipper, narrow band filter, amplifier of the second level Big Dipper, amplifier of the third level Big Dipper and the band pass filter that is electrically connected successively.Amplifier of the described first order Big Dipper, amplifier of the second level Big Dipper and amplifier of the third level Big Dipper are the low noise amplifier of 2492MHz.Amplifier input terminal of the first order Big Dipper is connected to low-loss band-pass filter, is used for filtering out of band signal and interference; Amplifier of the first order Big Dipper adopts the high linearity low noise amplifier; Between amplifier of the first order Big Dipper and amplifier of the second level Big Dipper, insert narrow band filter, enter the noise gross power of an amplifier of the second level Big Dipper with reduction; Output at an amplifier of the third level Big Dipper inserts band pass filter, and the filtering out-of-band noise reduces the interference to gps signal.The input of a low noise amplifier 8 of the Big Dipper inserts low-loss band-pass filter, adopts the high linearity low noise amplifier to improve its antiblocking ability simultaneously; Between amplifier stage, insert the selectivity of highly selective filter, thereby improve inhibition ability with outer interference with the raising whole amplifier.
Described GPS low noise amplifier 9 comprises band pass filter, first order GPS amplifier, band pass filter, second level GPS amplifier, third level GPS amplifier and the band pass filter that is electrically connected successively.In GPS low noise amplifier 9, the output of first order GPS amplifier in, output and third level GPS amplifier is connected to band pass filter, disturbs outward with inhibition zone, reduces the interference to a signal of the Big Dipper simultaneously.
The output of low noise amplifier 8 of the Big Dipper and GPS low noise amplifier 9 is connected with mixer 10, the output of mixer 10 is electrically connected radio frequency cable 7, and low noise amplifier 8 of the Big Dipper and GPS low noise amplifier 9 close the same output port output GPS of Lu Houcong and satellite-signal of the Big Dipper.
For reducing cost, reduce volume, between reception antenna 2 of the Big Dipper and low noise amplifier 8 of the Big Dipper, GPS reception antenna 3 and 9 employing probes of GPS low noise amplifier directly weld.
In the present embodiment, reception antenna 2 of the Big Dipper and GPS reception antenna 3 are the microstrip antenna that Xi'an parent company of Tian Tong Electronics produces.The in-band insertion loss of low-loss band-pass filter should be lower than 0.6dB, the 2 chamber low loss dielectric cavity body filters that can adopt Zhengyuan Electric Co., Ltd., Zhejiang to produce.Amplifier of the first order Big Dipper is for to be lower than 1dB at 2492MHz frequency noise factor, and 1dB compression point power output is not less than 10dBm, and gain is greater than the low noise amplifier of 15dB, for example the ATF55143 low noise field effect transistor amplifier of AVAGO company.The three dB bandwidth of narrow band filter should be no more than 20MHz, as 3 chamber dielectric cavity fluid filters of Zhengyuan Electric Co., Ltd., Zhejiang's production.Amplifier of the second level Big Dipper and amplifier of the third level Big Dipper can use at 2492MHz frequency noise factor and be lower than 3dB, 1dB compression point power output is not less than 0dBm, the amplifier of gain in 16～24dB scope is as the MGA-86576 of AVAGO company low noise amplifier.856561 surface acoustic wave bandpass filters such as frequency such as L1 such as GPS such as grade that band pass filter in the GPS low noise amplifier 9 can adopt TRIQUINT company to produce.First order GPS amplifier can use at GPS frequency noise factor and be lower than 1dB, and 1dB compression point power output is not less than 5dBm, and gain is greater than the low noise amplifier of 15dB, as the MAX2659 of MAXIM company low noise GPS amplifier.Second level GPS amplifier and third level GPS amplifier can use at 2492MHz frequency noise factor and be lower than 3dB, and 1dB compression point power output is not less than 0dBm, and the amplifier of gain in 16～24dB scope is as MAX2659, MGA-86575.
If the overall gain of low noise amplifier 8 of the Big Dipper and GPS low noise amplifier 9 is lower than 40dB, can not use third level amplifier and third level filter.
The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (6)
1, dual frequency active reception antenna of a kind of GPS and the Big Dipper is characterized in that: comprise base plate (1), a reception antenna of the Big Dipper (2), GPS reception antenna (3), shielding case (4), screening cover (5), circuit board (6) and radio frequency cable (7) and be located at a low noise amplifier of the Big Dipper (8) and GPS low noise amplifier (9) on the circuit board (6); Upper surface at base plate (1) is provided with a GPS reception antenna (3) and a reception antenna of the Big Dipper (2), lower surface at base plate (1) is provided with shielding case (4) and screening cover (5), in the electromagnetic shielding space of shielding case (4) and screening cover (5) formation, be provided with circuit board (6), a reception antenna of the Big Dipper (2) and GPS reception antenna (3) respectively with a low noise amplifier of the Big Dipper (8), GPS low noise amplifier (9) is electrically connected, the output of a low noise amplifier of the Big Dipper (8) and GPS low noise amplifier (9) is connected with mixer (10), and the output of mixer (10) is electrically connected radio frequency cable (7).
2, dual frequency active reception antenna of the GPS according to claim 1 and the Big Dipper is characterized in that: a low noise amplifier of the described Big Dipper (8) comprises amplifier of low-loss band-pass filter, the first order Big Dipper, narrow band filter, amplifier of the second level Big Dipper, amplifier of the third level Big Dipper and the band pass filter that is electrically connected successively.
3, dual frequency active reception antenna of the GPS according to claim 2 and the Big Dipper is characterized in that: low noise, high linearity amplifier that amplifier of the described first order Big Dipper is 2492MHz.
4, dual frequency active reception antenna of the GPS according to claim 1 and the Big Dipper is characterized in that: described GPS low noise amplifier (9) comprises band pass filter, first order GPS amplifier, band pass filter, second level GPS amplifier, third level GPS amplifier and the band pass filter that is electrically connected successively.
5, dual frequency active reception antenna of the GPS according to claim 1 and the Big Dipper is characterized in that: the low noise that described first order GPS amplifier is the GPS frequency, high linearity amplifier.
6, dual frequency active reception antenna of the GPS according to claim 1 and the Big Dipper is characterized in that: a reception antenna of the described Big Dipper (2) and GPS reception antenna (3) are for utilizing the microstrip antenna of probe output signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200458476U CN201408842Y (en) | 2009-05-14 | 2009-05-14 | Double-frequency active receiving antenna of GPS and No.1 beidou system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200458476U CN201408842Y (en) | 2009-05-14 | 2009-05-14 | Double-frequency active receiving antenna of GPS and No.1 beidou system |
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| Publication Number | Publication Date |
|---|---|
| CN201408842Y true CN201408842Y (en) | 2010-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009200458476U Expired - Lifetime CN201408842Y (en) | 2009-05-14 | 2009-05-14 | Double-frequency active receiving antenna of GPS and No.1 beidou system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623806A (en) * | 2011-09-07 | 2012-08-01 | 嘉兴联星微电子有限公司 | High-stability low-noise GPS (Global Positioning System) active antenna |
| CN103076470A (en) * | 2013-01-06 | 2013-05-01 | 中国电子科技集团公司第四十一研究所 | Shielding method and shielding structure of radio frequency test circuit |
| CN104617972A (en) * | 2014-12-30 | 2015-05-13 | 宇龙计算机通信科技(深圳)有限公司 | Method and device for transmitting signal, and terminal |
| CN106646533A (en) * | 2017-03-13 | 2017-05-10 | 北京中科众为技术有限公司 | Subminiature Beidou positioning module and application method |
| CN114171914A (en) * | 2022-02-11 | 2022-03-11 | 河北晶禾电子技术股份有限公司 | Beidou antenna |
| WO2023098648A1 (en) * | 2021-12-01 | 2023-06-08 | 中兴通讯股份有限公司 | Active antenna unit and base station |
-
2009
- 2009-05-14 CN CN2009200458476U patent/CN201408842Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623806A (en) * | 2011-09-07 | 2012-08-01 | 嘉兴联星微电子有限公司 | High-stability low-noise GPS (Global Positioning System) active antenna |
| CN102623806B (en) * | 2011-09-07 | 2014-07-16 | 嘉兴联星微电子有限公司 | High-stability low-noise GPS (Global Positioning System) active antenna |
| CN103076470A (en) * | 2013-01-06 | 2013-05-01 | 中国电子科技集团公司第四十一研究所 | Shielding method and shielding structure of radio frequency test circuit |
| CN104617972A (en) * | 2014-12-30 | 2015-05-13 | 宇龙计算机通信科技(深圳)有限公司 | Method and device for transmitting signal, and terminal |
| CN106646533A (en) * | 2017-03-13 | 2017-05-10 | 北京中科众为技术有限公司 | Subminiature Beidou positioning module and application method |
| WO2023098648A1 (en) * | 2021-12-01 | 2023-06-08 | 中兴通讯股份有限公司 | Active antenna unit and base station |
| CN114171914A (en) * | 2022-02-11 | 2022-03-11 | 河北晶禾电子技术股份有限公司 | Beidou antenna |
| CN114171914B (en) * | 2022-02-11 | 2022-05-24 | 河北晶禾电子技术股份有限公司 | Beidou antenna |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100217 |