CN202678506U - Choke coil GNSS antenna - Google Patents
Choke coil GNSS antenna Download PDFInfo
- Publication number
- CN202678506U CN202678506U CN 201220308702 CN201220308702U CN202678506U CN 202678506 U CN202678506 U CN 202678506U CN 201220308702 CN201220308702 CN 201220308702 CN 201220308702 U CN201220308702 U CN 201220308702U CN 202678506 U CN202678506 U CN 202678506U
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- China
- Prior art keywords
- filter
- antenna
- amplifying circuit
- metal
- choke
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- Expired - Lifetime
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Abstract
The utility model discloses a choke coil GNSS antenna, which comprises an antenna irradiator, four metal feed probes, probe fixing columns, an active circuit board and choke coils. The four metal feed probes are fixed onto the antenna irradiator through the probe fixing columns. The antenna irradiator is arranged on the active circuit board. The periphery of the active circuit board is provided with a circle of metal strip so as to form a reflection cavity. The three choke coils are evenly distributed outside the reflection cavity. The choke coil GNSS antenna is structurally designed as a metal ring, so that the height of a passive antenna is improved. Meanwhile, the range of wave beams is broadened and the signal receiving capability of the antenna is improved. The three choke coils has the advantages of simple structure, small volume and low cost.
Description
Technical field
The utility model relates to a kind of antenna, relates in particular to a kind of choke GNSS antenna.
Background technology
Reflection and scattering can occur when running into the complex environment such as skyscraper, large tracts of land lake in communication process in the satellite direct signal, some reflection and the signal of scattering can and until signal is received the machine antenna reception together, these reflection and scattered signals that enter receiver antenna are equivalent to the direct signal that propagation path prolongs, and are referred to as multipath signal.Multipath signal is compared with direct signal, and phase place lags behind, and amplitude may decay or strengthen.Multipath signal shows two aspects to the impact of receiver performance: cause that carrier-to-noise ratio changes 1..Multipath signal and direct signal are in receiver internal condition amplitude and phase relation stack, and the superposed signal amplitude is determined by both phase relations.2. range accuracy reduces, and multipath signal causes a yard relevant peaks distortion, reduces range accuracy.Therefore multipath effect is the appreciable error source of satellite navigation system.The amplitude of multipath error is larger, and has very strong occuping property, multipath signal under the varying environment is generally uncorrelated, thereby to attempt by differential technique be impossible with its elimination, it also is infeasible that each receiver antenna environment of living in is carried out modeling, can only adopt the multipaths restraint technology just can reduce multipath to the impact of range accuracy.Four arm spiral choke antennas are in the market made complicated, and cost is high, and its antenna area occupied is large.
The utility model content
The utility model purpose is to provide a kind of choke GNSS antenna for the defective that prior art exists.
The utility model adopts following technical scheme for achieving the above object:
A kind of choke GNSS of the utility model antenna comprises antenna radiator, four metal feed probes, probe fixed leg, active circuit plate and chokes rings; Wherein four metal feed probes are fixed on the antenna radiator by the probe fixed leg, and antenna radiator is arranged on the active circuit plate, and the circle bonding jumper that distributes around the active circuit plate consists of reflection cavity, outer uniform three the chokes rings of reflection cavity.
Preferably, equal length is stretched out on described antenna radiator four limits, and to be four of the 90 ° of symmetries of being separated by long-armed, and the antenna radiator center is summit, foursquare four right angle and is distributed with four power feed hole.
Preferably, described four metal feed probes outer layer metal layers are ground plane, and the centre feed pin is feed layer; Wherein first, second metal feed probes only uses ground plane to do ground connection use, the outer layer metal that the feed pin of the 3rd metal feed probes connects the second metal feed probes is connected to the ground, and the outer layer metal that the feed pin of while the 4th metal feed probes connects the first metal feed probes is connected to the ground; Three, the 4th metal feed probes is respectively with the signal feed-in active circuit plate of accepting.
Preferably, described active circuit plate comprises same frequency combiner, splitter, the first filter, the first amplifying circuit, the 3rd filter, the second filter, the second amplifying circuit, the 4th filter, the 4th amplifying circuit, mixer, the 5th amplifying circuit and the 3rd amplifying circuit, wherein connect respectively the input of the first filter and the second filter behind the output serial connection splitter with frequency combiner, the output of the first filter is connected in series an amplifying circuit successively, connect the input of the 4th amplifying circuit behind the 4th filter, the output of the second filter is connected in series two amplifying circuits successively, connect the input of the 3rd amplifying circuit behind the 3rd filter, the 3rd, the output of the 4th amplifying circuit connects respectively the input of mixer, the input of output termination the 5th amplifying circuit of mixer.
Preferably, described three chokes ring tops are concordant, and the bottom surface is the inside gradual change of ladder and increases.
Described probe positioning post links to each other with the active circuit plate with passive antenna by glue, and altitude range is set between the 20-21mm.
The active pcb board in described broad-band antenna bottom surface is rounded, link to each other with the first base by the screw with spring washer by placing 8 screw holes at periphery, it is that the round degree of depth of 100mm is the hollow of 10mm that diameter is drawn out in its substrate inside, and this kind mode has been omitted radome can suppress self-oscillation simultaneously;
The utility model metal ring project organization has improved the height of passive antenna, but the broadening beam area strengthens the signal ability to accept of antenna.Three chokes ring structures are simple, and volume is little, and cost is low.
Description of drawings
Fig. 1: the utility model structural representation.
Fig. 2: the utility model active circuit plate schematic diagram.
Fig. 3: the utility model embodiment appearance assumption diagram.
Fig. 4: four feed probes connection layouts of the utility model.
Fig. 5: the utility model antenna radiator structure chart.
Fig. 6: the utility model probe fixed leg structure chart.
Fig. 7: the utility model example structure figure.
Embodiment
Such as Fig. 1, shown in Figure 3, a kind of choke GNSS of the utility model antenna comprises antenna radiator, four metal feed probes, probe fixed leg, active circuit plate, aluminium base, miniature antenna cover and chokes rings; Wherein four metal feed probes are fixed on the antenna radiator by the probe fixed leg, and antenna radiator is arranged on the active circuit plate, and the circle bonding jumper that distributes around the active circuit plate consists of reflection cavity, outer uniform three the chokes rings of reflection cavity.
As shown in Figure 5, described passive antenna radiant body adopts the FPC material to be made, radiant body stretches out equal length, and to be four of the 90 ° of symmetries of being separated by long-armed, and the center is summit, foursquare four right angle and is distributed with four power feed hole, and the metal radiation body on the FPC is the rule symmetric figure; There are respectively two trapezoidal stretching out at each single armed edge, and is used for being stuck in lower floor's active circuit plate;
As shown in Figure 4, described four feed probes are set as A, B, C, D such as figure respectively, and outer layer metal layer is ground plane 4, and the centre feed pin is feed layer 5;
As shown in Figure 6, described feed probes fixes by the probe positioning post, and the probe positioning post is cylinder, and there are four four through hole E, Fs, G, the Hs slightly larger than probe in its inside, four through holes respectively with four power feed hole symmetries of passive antenna radiant body;
Described feed probes A, B, C, D, pass the passive antenna radiant body and penetrate the active circuit plate through probe positioning post E, F, G, H, wherein A, B probe only use ground plane to do ground connection use, the summit feed pin of probe C connects the B probe and is connected to the ground, and the summit feed pin of while probe D connects the A probe and is connected to the ground; Probe C and D are respectively with the two paths of signals feed-in active circuit plate of accepting;
Described probe fixed leg links to each other with the active circuit plate with passive antenna by glue, and altitude range is set between the 20-21mm, and this kind mode can guarantee the radiation efficiency of antenna;
As shown in Figure 2, in the described active circuit plate, C, D two way feed signal are through synthesizing one the tunnel with frequency combiner with signal, be divided into two paths of signals by splitter and be respectively high frequency (1545MHZ-1625MHZ) and low frequency (1156MHZ-1286MHZ), described high-frequency signal again amplifies by the first filter filtering, the amplification of the first amplifying circuit signal, the again filtering of the 3rd filter, the 4th amplifying circuit and is input to mixer; Described low frequency signal is input to mixer by the second filter filtering, the amplification of the second amplifying circuit signal, the 4th filter filtering, the amplification of the 4th amplifying circuit signal; Described mixer is exported synthetic the amplification by the 5th amplifying circuit of two paths of signals by video-frequency connector;
Be distributed with a circle radius around the described active circuit plate upper surface and be 50mm, highly be the metal copper bar reflection cavity 2 of 14mm, this kind design has best effect to the antenna multipaths restraint;
As shown in Figure 7, the active pcb board in described broad-band antenna bottom surface is rounded, links to each other with the first base by placing 8 screw holes at periphery, and base is aluminum base plate 4, and it is that the round degree of depth of 100mm is the hollow of 10mm that diameter is drawn out in its substrate inside; This kind mode has avoided active circuit to use radome, can pass through simultaneously the height of the raising antenna of aluminium base, the aluminium base center is to outer radius 54mm, 56.5mm, be distributed with respectively 8 via holes on the 64mm and be used for being fixed with source antenna and aluminium base, aluminium base and choke, miniature antenna cover and aluminium base, wherein active antenna links to each other by the screw with spring pad with aluminium base, and the upper screw thread glue of point, aluminium base links to each other by the screw with spring shim with choke, and the upper screw thread glue of point, link to each other by tubular rivet between choke and the miniature antenna cover, this kind connected mode is solid reliable, has an irregular via hole to be used for the output of radio frequency electrical cable on the aluminium base;
Radio frequency output line on the described active circuit plate is the TNC joint, can be fixed on the choke and export;
Described three chokes rings, 3 spacing 34mm, depth capacity 55mm, ladder gradual change 6mm.Described three chokes ring tops are concordant, and the bottom surface is the inside gradual change of ladder and increases.
Claims (6)
1. a choke GNSS antenna is characterized in that comprising antenna radiator, four metal feed probes, probe fixed leg, active circuit plate and chokes rings; Wherein four metal feed probes are fixed on the antenna radiator by the probe fixed leg, and antenna radiator is arranged on the active circuit plate, and the circle bonding jumper that distributes around the active circuit plate consists of reflection cavity, outer uniform three the chokes rings of reflection cavity.
2. a kind of choke GNSS antenna according to claim 1, it is characterized in that stretching out equal length in described antenna radiator four limits, to be four of the 90 ° of symmetries of being separated by long-armed, and the antenna radiator center is summit, foursquare four right angle and is distributed with four power feed hole.
3. a kind of choke GNSS antenna according to claim 1 is characterized in that described four metal feed probes (A, B, C, D) outer layer metal layer is ground plane, and the centre feed pin is feed layer; Wherein first, second metal feed probes (A, B) only uses ground plane to do ground connection use, the outer layer metal that the feed pin of the 3rd metal feed probes (C) connects the second metal feed probes (B) is connected to the ground, and the outer layer metal that the feed pin of while the 4th metal feed probes (D) connects the first metal feed probes (A) is connected to the ground; Three, the 4th metal feed probes (C, D) is respectively with the signal feed-in active circuit plate of accepting.
4. a kind of choke GNSS antenna according to claim 1, it is characterized in that described active circuit plate comprises same frequency combiner (101), splitter (102), the first filter (103), the first amplifying circuit (104), the 3rd filter (105), the second filter (106), the second amplifying circuit (107), the 4th filter (108), the 4th amplifying circuit (109), mixer (110), the 5th amplifying circuit (111) and the 3rd amplifying circuit (112), wherein connect respectively the input of the first filter (103) and the second filter (106) behind the output of same frequency combiner (101) the serial connection splitter (102), the output of the first filter (103) is connected in series an amplifying circuit (104) successively, connect the input of the 4th amplifying circuit (109) behind the 4th filter (108), the output of the second filter (106) is connected in series two amplifying circuits (107) successively, connect the input of the 3rd amplifying circuit (112) behind the 3rd filter (105), the 3rd, the 4th amplifying circuit (112,109) output connects respectively the input of mixer (110), the input of output termination the 5th amplifying circuit (111) of mixer (110).
5. a kind of choke GNSS antenna according to claim 1 is characterized in that described three chokes ring tops are concordant, and the bottom surface is the inside gradual change of ladder and increases.
6. a kind of choke GNSS antenna according to claim 1 is characterized in that described probe positioning post links to each other with the active circuit plate with passive antenna by glue, and altitude range is set between the 20-21mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220308702 CN202678506U (en) | 2012-06-28 | 2012-06-28 | Choke coil GNSS antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220308702 CN202678506U (en) | 2012-06-28 | 2012-06-28 | Choke coil GNSS antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202678506U true CN202678506U (en) | 2013-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220308702 Expired - Lifetime CN202678506U (en) | 2012-06-28 | 2012-06-28 | Choke coil GNSS antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202678506U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457027A (en) * | 2013-08-30 | 2013-12-18 | 深圳市华信天线技术有限公司 | Diameter restraining device and antenna system |
| CN108206324A (en) * | 2016-12-16 | 2018-06-26 | 香港城市大学深圳研究院 | Compact high-performance GNSS antenna |
| CN109638430A (en) * | 2019-01-29 | 2019-04-16 | 深圳市集众思创科技有限公司 | A kind of measurement type antenna |
| CN111864359A (en) * | 2020-08-28 | 2020-10-30 | 西安电子科技大学 | Four-feed plane helical antenna in global satellite navigation system |
| CN114069216A (en) * | 2021-12-29 | 2022-02-18 | 陕西海积信息科技有限公司 | Circularly polarized antenna and positioning terminal |
| CN114094320A (en) * | 2021-11-24 | 2022-02-25 | 上海海积信息科技股份有限公司 | GNSS antenna and combined antenna |
-
2012
- 2012-06-28 CN CN 201220308702 patent/CN202678506U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457027A (en) * | 2013-08-30 | 2013-12-18 | 深圳市华信天线技术有限公司 | Diameter restraining device and antenna system |
| CN108206324A (en) * | 2016-12-16 | 2018-06-26 | 香港城市大学深圳研究院 | Compact high-performance GNSS antenna |
| CN108206324B (en) * | 2016-12-16 | 2019-10-29 | 香港城市大学深圳研究院 | Compact high-performance GNSS antenna |
| CN109638430A (en) * | 2019-01-29 | 2019-04-16 | 深圳市集众思创科技有限公司 | A kind of measurement type antenna |
| CN111864359A (en) * | 2020-08-28 | 2020-10-30 | 西安电子科技大学 | Four-feed plane helical antenna in global satellite navigation system |
| CN114094320A (en) * | 2021-11-24 | 2022-02-25 | 上海海积信息科技股份有限公司 | GNSS antenna and combined antenna |
| CN114069216A (en) * | 2021-12-29 | 2022-02-18 | 陕西海积信息科技有限公司 | Circularly polarized antenna and positioning terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 201702 Shanghai city Qingpu District No. 599, building 1, 3 Gaojing Road, Room 301 Patentee after: SHANGHAI HIGH GAIN INFORMATION TECHNOLOGY Co.,Ltd. Address before: 200233, building 15, building 481, Guiping Road, Shanghai, Xuhui District, 6A1 Patentee before: Shanghai Haiji Information Technology Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130116 |
|
| CX01 | Expiry of patent term |