CN202167621U - Electric tuning filtering active antenna used for DGPS beacon receiver - Google Patents
Electric tuning filtering active antenna used for DGPS beacon receiver Download PDFInfo
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- CN202167621U CN202167621U CN2011202338457U CN201120233845U CN202167621U CN 202167621 U CN202167621 U CN 202167621U CN 2011202338457 U CN2011202338457 U CN 2011202338457U CN 201120233845 U CN201120233845 U CN 201120233845U CN 202167621 U CN202167621 U CN 202167621U
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- beacon receiver
- electric tuning
- tuning
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Abstract
The utility model discloses an electric tuning filtering active antenna used for a DGPS beacon receiver. The electric tuning filtering active antenna includes an antenna and signal combined circuit. The antenna and signal combined circuit is connected with a power divider. One output terminal of the power divider is connected with a main channel receiving circuit of the DGPS beacon receiver via a first electric tuning band-pass filter and a first low noise amplifying circuit, and the other output terminal of the power divider is connected with a backup channel receiving circuit of the DGPS beacon receiver via a second electric tuning band-pass filter and a second low noise amplifying circuit. The first electric tuning band-pass filter and the second electric tuning band-pass filter are connected with a tuning circuit which tunes the first and second electric tuning band-pass filters. The electric tuning filtering active antenna can effectively filter an interference signal outside of a changeable receiving frequency band, thus improving the entire sensibility and anti-interference performance of the DGPS beacon receiver.
Description
Technical field
The utility model relates to a kind of active antenna, relates in particular to a kind of active antenna of charged tunable bandpass filter, is used for DGPS (Differential Global Positioning System is called for short DGPS) beacon receiver.
Background technology
Coastal radiobeacon-DGPS (Radio Beacon Navigation-Differential GPS is called for short RBN-DGPS) is a kind of high accuracy, round-the-clock marine celestial navigation navigation system.The RBN-DGPS system broadcasts GPS difference correction information in the overlay area, its reference carrier frequency is 283.5kHz～325kHz, and channel spacing is 500Hz.The DGPS beacon receiver receives above-mentioned signal, redispatches to the GPS receiver, and the GPS receiver utilizes difference correction information can improve locating accuracy and reliability.
By the MSC.114 of International Maritime Organization (IMO) (73) and International Power tissue (IEC) IEC 61108-4 requirement to DGPS beacon receiver equipment; Receiver need comprise that the two-way receive path (is a receiving circuit; Be not meant antenna): the one tunnel is main receive path; Be used for receiving range recently or signal quality, a best signal of broadcasting station emission of station health status, and demodulation exports the GPS receiver to, improve its positioning accuracy and integrity; Another road is subsequent use receive path, the signal that the station is respectively broadcast in the reception that is used to circulate, monitoring.Receiver continues that two-way is received signal to be kept watch on and switches, to guarantee to receive all the time optimum signal.
Document " development of differential GPS digital beacon receiver " (carrying " telecom technology " 2004 the 5th phases) has been introduced the active antenna that is used for the DGPS beacon receiver, promptly in antenna circuit, has comprised amplifier, filter etc.But this active antenna is the antenna of full frequency band, and frequency range is that promptly bandwidth is at 41.5kHz more than 283.5kHz～325kHz.The advantage of this scheme is two public antenna circuits of receive path, and cost is cheap; Its shortcoming is that antenna circuit can't be to carrying out effective filtering with outer interference signal.In actual use, owing to have a large amount of long wave radio station interference signals in the operating frequency range, these signals are by indiscriminate unified amplification of antenna circuit, and interference signal amplitude is very big, even causes the saturated of back-end processing circuit, directly influences the quality of reception.
The utility model content
Deficiency to the prior art existence; The utility model technical problem to be solved provides a kind of electric tuning filtering active antenna of the DGPS of being used for beacon receiver; The effective outer interference signal of the variable receive frequency band of filtering improves the sensitivity and the antijamming capability of DGPS beacon receiver complete machine.
The utility model is to solve the problems of the technologies described above the technical scheme that adopts to be:
A kind of electric tuning filtering active antenna that is used for the DGPS beacon receiver; Said active antenna links to each other with the DGPS beacon receiver; Wherein, Said active antenna comprises antenna and signal synthesis circuit; Said antenna and signal synthesis circuit link to each other with power splitter, and one road output of said power splitter links to each other through the main channel receiving circuit of the first electric tuning band pass filter, first low noise amplifier circuit and DGPS beacon receiver, and another road output links to each other through the alternate channel receiving circuit of the second electric tuning band pass filter, second low noise amplifier circuit and DGPS beacon receiver; The said first electric tuning band pass filter and the second electric tuning band pass filter with its tuning tuning circuit is linked to each other.
Said tuning circuit comprises the CPU module; Said CPU module links to each other with the memory that contains the frequency/voltage values for tuning; And, link to each other with the second electric tuning band pass filter through second D/A converter and to export B passage VT through first D/A converter output A channel VT that links to each other with the first electric tuning band pass filter.
The said first and second electric tuning band pass filters are by the LC series resonant circuit composition that comprises that variable capacitance diode C3, capacitor C 1 and inductance L 1 constitute.
Said antenna and signal synthesis circuit comprise two groups of mutually perpendicular magnetic antennas, and every group of magnetic antenna is composed in series by two magnetic antennas parallel to each other; The output signal of one group of magnetic antenna through 90 ° of phase shifts after with another the group magnetic antenna output signal superimposed.
The CPU module of said tuning circuit and the contained CPU of DGPS beacon receiver are same CPU, and said memory and the contained memory of DGPS beacon receiver that contains the frequency/voltage values for tuning is same memory.
The utility model contrast prior art has following beneficial effect: the electric tuning filtering active antenna that is used for the DGPS beacon receiver that the utility model provides; Antenna circuit through two groups of independently charged tuning bandpass filterings and amplification; Realized that the DGPS beacon receiver receives the difference calibrating signal that the two-way frequency is identical or different and receive frequency is variable simultaneously; And carried out the variable narrower filtering of bandwidth of centre frequency respectively; Thereby the outer interference signal of effective variable receive frequency band of filtering, the sensitivity and the antijamming capability of raising DGPS beacon receiver complete machine.
Description of drawings
Fig. 1 is used for the electric tuning filtering active antenna structural representation of DGPS beacon receiver for the utility model;
Fig. 2 is that tuning circuit is formed sketch map in the utility model active antenna;
Fig. 3 is that the electric tuning band pass filter is formed sketch map in the utility model active antenna;
Fig. 4 is a magnetic antenna spatial placement sketch map in the utility model active antenna.
Label declaration among the figure:
11 antennas and signal synthesis circuit 12 power splitters 13 first electric tuning band pass filters
14 first low noise amplifier circuits, 15 main channel receiving circuits, 16 tuning circuits
17 second electric tuning band pass filters, 18 second low noise amplifier circuits, 19 alternate channel receiving circuits
21 contain memory 22CPU module 23 first D/A converters of frequency/voltage values for tuning
24 second D/A converters
Embodiment
Below in conjunction with accompanying drawing 1-Fig. 4 the utility model is done further to describe.
Embodiment
Fig. 1 is used for the electric tuning filtering active antenna structural representation of DGPS beacon receiver for the utility model.
See also Fig. 1; The electric tuning filtering active antenna that is used for the DGPS beacon receiver that the utility model provides; Said active antenna links to each other with the DGPS beacon receiver; Wherein, said active antenna comprises antenna and signal synthesis circuit 11, and said antenna and signal synthesis circuit 11 link to each other with power splitter 12; One road output of said power splitter 12 links to each other through the main channel receiving circuit 15 of the first electric tuning band pass filter 13, first low noise amplifier circuit 14 and DGPS beacon receiver, and the alternate channel receiving circuit 19 that another road output passes through the second electric tuning band pass filter 17, second low noise amplifier circuit 18 and DGPS beacon receiver links to each other; The said first electric tuning band pass filter 13 and the second electric tuning band pass filter 17 with its tuning tuning circuit 16 is linked to each other.
The utility model provides the DGPS beacon receiver that the two-way receive path is arranged: the one tunnel is main receive path; Be used for receiving range recently or signal quality, a best signal of broadcasting station emission of station health status; And demodulation exports the GPS receiver to, improves its positioning accuracy and integrity; Another road is subsequent use receive path, and all broadcast the signal of the station to be used for the scan round reception, and stores the information of broadcasting the station by the good and bad order of received signal, switches the usefulness of receive frequency in order to main receive path.Receiver continues that two-way is received signal to be kept watch on; In case signal that main receive path receives or station health status are undesirable; Then main receive path switches to receive frequency on the frequency of the Optimal Signals that subsequent use receive path stores, and receives optimum signal all the time to guarantee receiver.
Because the DGPS beacon receiver need receive two paths of signals simultaneously, and receive frequency is variable, so band pass filter needs two-way and centre frequency variable.For this reason, the utility model has adopted the antenna circuit of two groups of independently charged tuning bandpass filterings and amplification, and its output connects the main channel receiving circuit and the alternate channel receiving circuit of DGPS beacon receiver respectively; Every group of antenna circuit connected by the input of electric tuning band pass filter provides the power splitter of aerial signal and to its tuning tuning circuit, its output connects low noise amplifier circuit again and forms, and is as shown in Figure 1.
Low noise amplifier circuit in the utility model is general high-frequency amplifier circuit.In addition, see also Fig. 1 and Fig. 4, the antenna in the utility model in antenna and the signal synthesis circuit 11 is made up of magnetic antenna L1A, L1B and magnetic antenna L2A, the L2B of two groups of series connection.The magnetic antenna size is little, and quality factor are high.On spatial placement, magnetic antenna L1A, L1B are parallel to each other, and be orthogonal at grade with same parallel magnetic antenna L2A, L2B.The magnetic antenna size of mutually orthogonal is littler like this, can receive the signal of both direction respectively, improves the omni-directional reception of antenna.Wherein the output signal of the magnetic antenna of two series connection through the output signal of two magnetic antennas of connecting of 90 ° of phase shifts and other synthetic after, export two-way electric tuning band pass filter respectively to through power splitter 12.
See also Fig. 2, the electric tuning band pass filter circuit that the utility model adopts, its centre frequency can change with VT.The VT of traditional electrically tunable filter comes from the receiver frequency synthesizer circuit; But because there are certain non-linear and discreteness in electric tuning band pass filter centre frequency and VT; So there is the error of certain centre frequency in traditional tuning circuit, influenced the sensitivity and the antijamming capability of filtration efficiency and complete machine.The tuning circuit of the utility model is as shown in Figure 2, by CPU module 22 connect frequency/voltage values for tuning memories 21 and two-way separately in antenna circuit the D/A converter of electric tuning band pass filter output VT form.Promptly link to each other with the first electric tuning band pass filter 13 and export the A channel VT, link to each other with the second electric tuning band pass filter 17 through second D/A converter 24 and export B passage VT through first D/A converter 23.The method that produces the numerical value (being the frequency/voltage values for tuning) of D/A converter is; Through the electric tuning band pass filter being applied its centre frequency of VT test; Thereby find the mapping table of centre frequency and VT, it is converted to the numerical value of D/A converter and is pre-stored in frequency/voltage values for tuning memory.During the receiver operation; CPU module 22 reads the correspondent voltage values for tuning from frequency/voltage values for tuning memory 21 by the required centre frequency of channel; Be latched into D/A converter and produce corresponding VT and put on the electric tuning band pass filter, thereby change its centre frequency.Like this, improve the error of filter center frequency, improved the sensitivity and the antijamming capability of filtration efficiency and complete machine.The utility model is used the CPU module 22 that the CPU in the DGPS beacon receiver serves as tuning circuit, and the frequency/voltage values for tuning is pre-stored in the memory in the DGPS beacon receiver.
The electric tuning band pass filter circuit of the utility model is as shown in Figure 3: its capacitance of variable capacitance diode C3 can change with the VT of outside input, parallelly connectedly with capacitor C 1 has formed the LC series resonant circuit jointly with inductance L 1.The main effect of capacitor C 2 and C4 is to isolate VT.Like this, the variation of VT has changed C3 capacitance in the LC series resonant circuit, has changed its resonance frequency (being centre frequency) thus, thereby has accomplished the variable bandpass filter function of centre frequency.
In sum; The utility model adopts the antenna circuit of two groups of independently charged tuning bandpass filterings and amplification; Realized that the DGPS beacon receiver receives the difference calibrating signal that the two-way frequency is identical or different and receive frequency is variable simultaneously, and carried out the variable narrower filtering of bandwidth of centre frequency respectively.DGPS beacon receive channel reference carrier frequency is 283.5kHz～325kHz; Be merely at interval 500Hz, owing to adopted the MSK modulation technique, high modulation speed is 200bps; Its frequency modulation is merely 50Hz; Occupied bandwidth is very little, and (more than the 41.5kHz) compares with whole working bandwidth, be merely one of percentage less than.So if the antenna of receiver adopts narrow band filter, the effective band of the variable receive frequency of filtering interference signal outward then improves the sensitivity and the antijamming capability of DGPS beacon receiver complete machine greatly.
Though the utility model discloses as above with preferred embodiment; Right its is not in order to limit the utility model; Any those skilled in the art; In spirit that does not break away from the utility model and scope, when can doing a little modification and perfect, so the protection range of the utility model is when being as the criterion with what claims defined.
Claims (5)
1. electric tuning filtering active antenna that is used for the DGPS beacon receiver; Said active antenna links to each other with the DGPS beacon receiver; Said active antenna comprises antenna and signal synthesis circuit (11) and power splitter (12); It is characterized in that; Said antenna and signal synthesis circuit (11) link to each other with power splitter (12); One road output of said power splitter (12) links to each other through the main channel receiving circuit (15) of the first electric tuning band pass filter (13), first low noise amplifier circuit (14) and DGPS beacon receiver, and another road output links to each other through the alternate channel receiving circuit (19) of the second electric tuning band pass filter (17), second low noise amplifier circuit (18) and DGPS beacon receiver; The said first electric tuning band pass filter (13) and the second electric tuning band pass filter (17) all with it is carried out tuning tuning circuit (16) and links to each other.
2. the electric tuning filtering active antenna that is used for the DGPS beacon receiver as claimed in claim 1; It is characterized in that; Said tuning circuit (16) reaches the two-way D/A converter composition of first and second electric tuning band pass filters output VT in antenna circuit separately by CPU module (22) and the coupled frequency/voltage values for tuning memory (21) that connects.
3. the electric tuning filtering active antenna that is used for the DGPS beacon receiver as claimed in claim 2; It is characterized in that; The CPU module (22) and the contained CPU of DGPS beacon receiver of said tuning circuit are same CPU, and said memory (21) and the contained memory of DGPS beacon receiver that contains the frequency/voltage values for tuning is same memory.
4. the electric tuning filtering active antenna that is used for the DGPS beacon receiver as claimed in claim 1 is characterized in that, the first and second electric tuning band pass filters are by the LC series resonant circuit composition that comprises that variable capacitance diode C3, capacitor C 1 and inductance L 1 constitute.
5. the electric tuning filtering active antenna that is used for the DGPS beacon receiver as claimed in claim 1; It is characterized in that; Said antenna and signal synthesis circuit (11) comprise two groups of mutually perpendicular magnetic antennas, and every group of magnetic antenna is composed in series by two magnetic antennas parallel to each other; The output signal of one group of magnetic antenna through 90 ° of phase shifts after with output signal of another group magnetic antenna superimposed synthetic after, export the first and second electric tuning band pass filters respectively to through power splitter (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202338457U CN202167621U (en) | 2011-07-05 | 2011-07-05 | Electric tuning filtering active antenna used for DGPS beacon receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202338457U CN202167621U (en) | 2011-07-05 | 2011-07-05 | Electric tuning filtering active antenna used for DGPS beacon receiver |
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| Publication Number | Publication Date |
|---|---|
| CN202167621U true CN202167621U (en) | 2012-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202338457U Expired - Fee Related CN202167621U (en) | 2011-07-05 | 2011-07-05 | Electric tuning filtering active antenna used for DGPS beacon receiver |
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| CN (1) | CN202167621U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258695A (en) * | 2015-11-21 | 2016-01-20 | 广西南宁至简至凡科技咨询有限公司 | Boat body static navigation positioning system based on RBN or DGPS |
| CN108092846A (en) * | 2017-11-23 | 2018-05-29 | 宁夏回族自治区无线电管理委员会办公室 | A kind of radio frequency switching device and radio frequency switching method |
| CN110208826A (en) * | 2019-05-29 | 2019-09-06 | 哈尔滨工程大学 | A kind of digital satellite smart antenna of multimode multi-frequency |
| CN112737617A (en) * | 2021-04-01 | 2021-04-30 | 北京全路通信信号研究设计院集团有限公司 | Amplifier for vehicle-mounted radio frequency receiver and receiver |
| CN114035180A (en) * | 2021-11-05 | 2022-02-11 | 电子科技大学 | Large-scale frequency control array nonlinear frequency offset generation circuit |
-
2011
- 2011-07-05 CN CN2011202338457U patent/CN202167621U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258695A (en) * | 2015-11-21 | 2016-01-20 | 广西南宁至简至凡科技咨询有限公司 | Boat body static navigation positioning system based on RBN or DGPS |
| CN108092846A (en) * | 2017-11-23 | 2018-05-29 | 宁夏回族自治区无线电管理委员会办公室 | A kind of radio frequency switching device and radio frequency switching method |
| CN110208826A (en) * | 2019-05-29 | 2019-09-06 | 哈尔滨工程大学 | A kind of digital satellite smart antenna of multimode multi-frequency |
| CN112737617A (en) * | 2021-04-01 | 2021-04-30 | 北京全路通信信号研究设计院集团有限公司 | Amplifier for vehicle-mounted radio frequency receiver and receiver |
| CN114035180A (en) * | 2021-11-05 | 2022-02-11 | 电子科技大学 | Large-scale frequency control array nonlinear frequency offset generation circuit |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120314 Termination date: 20190705 |