CN107425277B - Multi-frequency combined satellite navigation terminal antenna - Google Patents
Multi-frequency combined satellite navigation terminal antenna Download PDFInfo
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- CN107425277B CN107425277B CN201710608969.0A CN201710608969A CN107425277B CN 107425277 B CN107425277 B CN 107425277B CN 201710608969 A CN201710608969 A CN 201710608969A CN 107425277 B CN107425277 B CN 107425277B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
- H01Q5/45—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements using two or more feeds in association with a common reflecting, diffracting or refracting device
- H01Q5/47—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements using two or more feeds in association with a common reflecting, diffracting or refracting device with a coaxial arrangement of the feeds
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention relates to a multi-frequency combined satellite navigation terminal antenna. The antenna comprises an antenna radiation main body, a feed probe, a coaxial feed line and a feed network; the feed network is positioned below the antenna radiation main body and is connected with the antenna radiation main body through the feed probe; the feed probe passes through the antenna radiating body; the coaxial feeder is connected with the feed network; the antenna radiation main body comprises a lower FR4 metal ground reflecting plate, an air overhead layer, an upper FR4 dielectric plate and a radiation patch unit which are sequentially arranged from bottom to top; the radiation patch unit comprises a double-ring-shaped structure radiation patch and four F-shaped structure radiation patches. The invention realizes the double-star four-frequency coverage of the antenna on a single-layer structure; the invention has the advantages of low profile, high axial ratio bandwidth and the like on the basis of having the multi-frequency characteristic, and is suitable for being applied to Beidou navigation terminal equipment.
Description
Technical Field
The invention relates to a satellite navigation antenna compatible with a GPS L1 frequency band and used for Beidou first-generation L frequency band, S frequency band and Beidou second-generation B1 frequency band, in particular to a multi-frequency combined satellite navigation terminal antenna.
Background
The Beidou satellite navigation system is a global satellite positioning and communication system which is independently researched and developed in China, and along with the gradual establishment and perfection of the Beidou satellite navigation system, the positioning and communication technology based on the Beidou satellite navigation system is rapidly developed, and the Beidou satellite navigation system is penetrated into various fields and widely applied to related applications such as military, traffic, water conservancy, rescue and relief work and the like. In order to realize a more accurate and stable navigation positioning function, the satellite navigation terminal needs to integrate different satellite navigation system information, which requires that the satellite navigation terminal antenna can be compatible with a plurality of satellite navigation systems. Some multisystem multifrequency antennas in the current market adopt a high-frequency plate stacking structure with low dielectric constant, and the antennas have larger volume, high section and large weight, so that the market demand of terminal miniaturization cannot be met.
Disclosure of Invention
The invention aims to provide a multi-frequency combined satellite navigation terminal antenna which has the advantages of low profile, high axial ratio bandwidth and the like on the basis of multi-frequency characteristics and is suitable for being applied to Beidou navigation terminal equipment.
In order to achieve the above purpose, the technical scheme of the invention is as follows: a multi-frequency combined satellite navigation terminal antenna comprises an antenna radiation main body, a feed probe, a coaxial feed line and a feed network; the feed network is positioned below the antenna radiation main body and is connected with the antenna radiation main body through the feed probe; the feed probe passes through the antenna radiating body; the coaxial feeder is connected with the feed network.
In an embodiment of the invention, the antenna radiation main body comprises a lower FR4 metal ground reflecting plate, an air overhead layer, an upper FR4 dielectric plate and a radiation patch unit which are sequentially arranged from bottom to top; the feed network passes through the lower FR4 metal ground reflecting plate, the air overhead layer and the upper FR4 medium plate through the feed probe and is connected with the radiation patch unit.
In an embodiment of the present invention, the radiation patch unit includes a dual-ring structure radiation patch and four F-shaped structure radiation patches; the radiation patch unit is etched on the upper surface of the upper FR4 dielectric plate.
In an embodiment of the present invention, the dual-ring-shaped radiation patch includes two inner and outer nested annular patches, two rectangular feeding coupling pieces, and the two rectangular feeding coupling pieces are located between the two inner and outer nested annular patches and connected with the feeding probe; four square grounding metal sheets are further arranged in the annular patch nested inside the annular patch in the two inner and outer nested annular patches, and the grounding metal sheets are connected with the lower FR4 metal ground reflecting plate through short-circuit probes.
In one embodiment of the present invention, the annular patch nested inside of the two inner and outer nested annular patches is a folded annular patch.
In an embodiment of the present invention, the folded annular patch is square and folded inwards at the midpoint of four sides of the annular patch.
In an embodiment of the present invention, the F-shaped structure radiation patch is located at an outer side of the dual-ring structure radiation patch, the F-shaped structure radiation patch is connected to the feed network through the feed probe, and the F-shaped structure radiation patch is connected to the lower layer FR4 metal ground reflecting plate at the short arm through the short circuit probe.
In one embodiment of the invention, the air-overhead layer may be filled with a medium.
In an embodiment of the present invention, the dual-loop-structure radiation patch uses a dual-point feeding network, and the four F-shaped-structure radiation patches use a four-point feeding network.
In an embodiment of the present invention, the two-point feed network is connected to the four-point feed network through a coaxial feed line; the double-point feed network adopts a 3dB 90-degree bridge, a T-shaped power division network or a Wilkinson feed network; the four-point feed network adopts a series feed network or a network formed by three groups of Wilkinson feed networks or a four-feed network built by a 3dB 90-degree bridge.
Compared with the prior art, the invention has the following beneficial effects: the invention not only can be used for transmitting the Beidou first-generation L frequency band signal and receiving the S frequency band signal, realizing the positioning and short message communication functions of the Beidou first-generation, but also can be used for receiving the signals of the Beidou second-generation B1 frequency band and the GPS L1 frequency band, realizing the positioning functions of the Beidou second-generation and the GPS, providing more stable and accurate navigation positioning service, and simultaneously, the antenna has the advantages of low profile, light weight and high axial ratio bandwidth, and can be well applied to Beidou navigation terminal equipment.
Drawings
Fig. 1 is a top view of the overall structure of the present invention.
Fig. 2 is a side view of the overall structure of the present invention.
Fig. 3 is a schematic diagram of a feed network structure of the present invention.
FIG. 4 is a graph of the reflection coefficient of the B1L1 band of the present invention.
FIG. 5 is a graph of the B1L1 band axial ratio of the present invention.
FIG. 6 is a graph of B1L1 band gain for the present invention.
Fig. 7 is a graph of the L-band reflection coefficient of the present invention.
Fig. 8 is an L-band axial ratio graph of the present invention.
Fig. 9 is an L-band gain plot of the present invention.
Fig. 10 is a graph of the S-band reflection coefficient of the present invention.
Fig. 11 is an S-band axial ratio graph of the present invention.
Fig. 12 is an S-band gain plot of the present invention.
In the figure, 1 is a B1 and L1 frequency band annular structure radiation patch, 11 is a grounding metal sheet, 111 and 42 are short-circuit probes, 2 is an L frequency band annular structure radiation patch, 3 is a rectangular feed coupling sheet, 31 and 41 are feed probes, 4 is an S frequency band F-shaped structure radiation patch, 5 is an upper FR4 dielectric plate, 6 is an air overhead layer, 7 is a lower FR4 metal ground reflecting plate, 8 is a feed network, 81 is a series feed network, and 82 is a 3dB 90 DEG bridge.
Detailed Description
The technical scheme of the invention is specifically described below with reference to the accompanying drawings.
The invention relates to a structural composite Beidou navigation antenna, which comprises an antenna radiation main body, a feed probe, a coaxial feed line and a feed network, wherein the antenna radiation main body is provided with a plurality of antenna radiating holes; the feed network is positioned below the antenna radiation main body and is connected with the antenna radiation main body through the feed probe; the feed probe passes through the antenna radiating body; the coaxial feeder is connected with the feed network. The antenna radiation main body comprises a lower FR4 metal ground reflecting plate, an air overhead layer, an upper FR4 dielectric plate and a radiation patch unit which are sequentially arranged from bottom to top; the feed network passes through the lower FR4 metal ground reflecting plate, the air overhead layer and the upper FR4 medium plate through the feed probe and is connected with the radiation patch unit.
The radiation patch unit comprises a double-ring-shaped structure radiation patch and four F-shaped structure radiation patches (particularly an F-shaped structure radiation patch of an S frequency band); the radiation patch unit is etched on the upper surface of the upper FR4 dielectric plate.
The double-ring-shaped structure radiation patch comprises two inner and outer nested ring-shaped patches (including B1 and L1 frequency band ring-shaped structure radiation patches positioned at the inner layer and L frequency band ring-shaped structure radiation patches positioned at the outer layer), two rectangular feed coupling pieces, wherein the two rectangular feed coupling pieces are positioned between the two inner and outer nested ring-shaped patches and are connected with a feed probe; four square grounding metal sheets are further arranged in the annular patch nested inside the annular patch in the two inner and outer nested annular patches, and the grounding metal sheets are connected with the lower FR4 metal ground reflecting plate through short-circuit probes. The grounding metal sheet may be square or any other shape. The annular patch nested inside the two inner and outer nested annular patches is a bent annular patch. The annular patch of buckling is square annular, and annular four sides mid point department all inwards buckles.
The F-shaped structure radiation patch is positioned at the outer side of the double-ring-shaped structure radiation patch, the F-shaped structure radiation patch is connected with a feed network through a feed probe, and the F-shaped structure radiation patch is connected with a lower FR4 metal ground reflecting plate at a short arm through a short circuit probe. The F-shaped radiation patch can be composed of any shape, such as a snake-shaped F-shape, a zigzag F-shape and the like.
The air overhead layer is fixed by plastic screws or metal screws, and can be filled by media such as foam, plastic and the like.
The dual-ring-shaped structure radiation patch adopts a double-point feed network, and the four F-shaped structure radiation patches adopt four-point feed networks. The double-point feed network is connected with the four-point feed network through coaxial feed lines; the double-point feed network adopts a 3dB 90-degree bridge, a T-shaped power division network or a Wilkinson feed network; the four-point feed network adopts a series feed network or a network formed by three groups of Wilkinson feed networks or a four-feed network built by a 3dB 90-degree bridge.
The following is a specific implementation procedure of the present invention.
As shown in fig. 1-3, the invention provides a four-frequency structure composite Beidou navigation antenna for the first-generation Beidou, second-generation Beidou B1 frequency band and GPS L1 frequency band, wherein the antenna comprises an antenna main body, a short-circuit probe, a feed probe, a coaxial feeder line and a feed network, wherein the antenna main body comprises a lower FR4 metal ground reflecting plate 7, an air overhead layer 6, an upper FR4 dielectric plate 5 and radiation patch units 1, 2 and 4 which are sequentially laminated from bottom to top; the upper surface of the upper FR4 medium plate is provided with an inner layer B1 and L1 frequency band annular structure radiation patch 1, an intermediate layer L frequency band annular structure radiation patch 2 and an outer layer S frequency band four F-shaped structure radiation patches 4; two rectangular feed coupling pieces 3 are arranged between the inner layer annular antenna radiation patches and the middle layer annular antenna radiation patches; the rectangular feed coupling sheet 3 is connected with the feed network 8 through the lower FR4 metal ground reflecting plate by a feed probe 31, and the feed probe 31 is not contacted with the lower FR4 metal ground reflecting plate 7; the inner layer annular radiation patch 1 is in a square annular shape, and the middle points of four sides of the annular shape are inwards bent; four square grounding metal sheets 11 are arranged in four corners of the annular patch 1, short-circuit metal probes 111 are arranged in the centers of the metal sheets 11, one ends of the short-circuit metal probes 111 are connected with the metal sheets 11, and the other ends of the short-circuit metal probes are connected with the lower FR4 metal ground reflecting plate 7; the middle layer antenna radiation patch 2 is in a square ring shape, corners of the outer ring shape are provided with chamfer angles, and corners of the inner ring shape are provided with complementary angles; the four F-shaped structure radiation patches 4 on the outer layer are four F-shaped vibrators, the four F-shaped structure radiation patches 4 on the outer layer pass through the lower FR4 metal ground reflecting plate 7 through the feed probe 41 and then are connected with the feed network 8, and the feed probe 41 is not contacted with the lower FR4 metal ground reflecting plate 7; the short arm ends of the four F-shaped structure radiation patches 4 are provided with short circuit metal probes 42, one ends of the short circuit metal probes 42 are connected with the four F-shaped structure radiation patches 4, and the other ends of the short circuit metal probes are connected with the lower FR4 metal ground reflecting plate 7. The lower FR4 metal ground reflecting plate 7 is provided with a feed network layer 8 at the lower layer, the feed network layer 8 is a series feed network 81 for four F-shaped structure radiation patches and a 3dB 90 DEG bridge 82 for annular structure radiation patches, and the coaxial feed lines are respectively connected with input ports of the series feed network 81 and the 3dB 90 DEG bridge 82 and serve as feed ports of the antenna.
Referring to fig. 4-12, fig. 4 is a graph of reflection coefficient of the B1L1 band of the antenna. Fig. 5 is an axial ratio graph of the B1L1 band, and fig. 6 is a gain graph of the B1L1 band. Fig. 7 is a graph of reflection coefficient of the L band of the antenna. Fig. 8 is an axial ratio graph of the L band, and fig. 9 is a gain graph of the L band. Fig. 10 is a graph of reflection coefficient of the S band of the antenna. Fig. 11 is an axial ratio graph of the S band, and fig. 12 is a gain graph of the S band. The antenna has good impedance matching characteristics and radiation characteristics in the frequency bands B1L1, L and S, so that the antenna can realize the receiving and transmitting of the Beidou first-generation signals, can receive the Beidou second-generation B1 signals and GPS signals, and provides more stable and accurate navigation positioning service.
The above is a preferred embodiment of the present invention, and all changes made according to the technical solution of the present invention belong to the protection scope of the present invention when the generated functional effects do not exceed the scope of the technical solution of the present invention.
Claims (6)
1. A multi-frequency combined satellite navigation terminal antenna is characterized in that: the antenna comprises an antenna radiation main body, a feed probe, a coaxial feed line and a feed network; the feed network is positioned below the antenna radiation main body and is connected with the antenna radiation main body through the feed probe; the feed probe passes through the antenna radiating body; the coaxial feeder is connected with the feed network; the antenna radiation main body comprises a lower FR4 metal ground reflecting plate, an air overhead layer, an upper FR4 dielectric plate and a radiation patch unit which are sequentially arranged from bottom to top; the feed network passes through the lower FR4 metal ground reflecting plate, the air overhead layer and the upper FR4 dielectric plate through the feed probe and is connected with the radiation patch unit; the radiation patch unit comprises a double-ring-shaped structure radiation patch and four F-shaped structure radiation patches; the radiation patch unit is etched on the upper surface of the upper FR4 dielectric plate; the double-ring-shaped structure radiation patch comprises two inner and outer nested ring-shaped patches and two rectangular feed coupling pieces, wherein the two rectangular feed coupling pieces are positioned between the two inner and outer nested ring-shaped patches and are connected with a feed probe; four square grounding metal sheets are further arranged in the annular patch nested inside the annular patch in the two inner-outer nested annular patches, and the grounding metal sheets are connected with the lower FR4 metal ground reflecting plate through short-circuit probes; the F-shaped structure radiation patch is positioned at the outer side of the double-ring-shaped structure radiation patch, the F-shaped structure radiation patch is connected with a feed network through a feed probe, and the F-shaped structure radiation patch is connected with a lower FR4 metal ground reflecting plate at a short arm through a short circuit probe.
2. The multi-frequency integrated satellite navigation terminal antenna of claim 1, wherein: the annular patch nested inside the two inner and outer nested annular patches is a bent annular patch.
3. The multi-frequency integrated satellite navigation terminal antenna of claim 2, wherein: the annular patch of buckling is square annular, and annular four sides mid point department all inwards buckles.
4. The multi-frequency integrated satellite navigation terminal antenna of claim 1, wherein: the air-overhead layer may be filled with a medium.
5. The multi-frequency integrated satellite navigation terminal antenna of claim 1, wherein: the dual-ring-shaped structure radiation patch adopts a double-point feed network, and the four F-shaped structure radiation patches adopt four-point feed networks.
6. The multi-frequency integrated satellite navigation terminal antenna of claim 5, wherein: the double-point feed network is connected with the four-point feed network through coaxial feed lines; the double-point feed network adopts a 3dB 90-degree bridge, a T-shaped power division network or a Wilkinson feed network; the four-point feed network adopts a series feed network or a network formed by three groups of Wilkinson feed networks or a four-feed network built by a 3dB 90-degree bridge.
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| CN107425277B true CN107425277B (en) | 2023-06-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108306106B (en) * | 2018-01-29 | 2023-06-27 | 福州大学 | Satellite navigation loop antenna and terminal with miniaturized rectangular patch short-circuit loading |
| CN113036439B (en) * | 2021-05-26 | 2021-07-30 | 成都天锐星通科技有限公司 | Microstrip antenna structure and communication equipment |
| US20230084483A1 (en) * | 2021-09-01 | 2023-03-16 | Drexel University | Pattern reconfigurable uhf rfid reader antenna array |
| CN117317575B (en) * | 2023-11-28 | 2024-02-06 | 福建福大北斗通信科技有限公司 | Cross dipole antenna with low axial ratio and wide frequency band |
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