CN110265779B - Dual-cross broadband high-low elevation gain satellite navigation terminal antenna - Google Patents
Dual-cross broadband high-low elevation gain satellite navigation terminal antenna Download PDFInfo
- Publication number
- CN110265779B CN110265779B CN201910668185.6A CN201910668185A CN110265779B CN 110265779 B CN110265779 B CN 110265779B CN 201910668185 A CN201910668185 A CN 201910668185A CN 110265779 B CN110265779 B CN 110265779B
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- low elevation
- antenna
- dipole arms
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- 230000005855 radiation Effects 0.000 claims abstract description 19
- 239000000523 sample Substances 0.000 claims abstract description 17
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 230000001965 increasing effect Effects 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 238000003854 Surface Print Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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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
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/02—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
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- Waveguide Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention relates to a double-cross broadband high-low elevation gain satellite navigation terminal antenna, which comprises a first dielectric plate, a second dielectric plate, a third dielectric plate, a fourth dielectric plate and a fence-shaped dielectric plate, wherein the first dielectric plate and the second dielectric plate are arranged in parallel up and down, the third dielectric plate and the fourth dielectric plate are crossed and vertically arranged between the first dielectric plate and the second dielectric plate, the upper surface of the first dielectric plate is printed with a radiation patch formed by two pairs of self-phase-shifting dipole arms, the front surface of the third dielectric plate and the front surface of the fourth dielectric plate are printed with radiation patches with dipole arms so as to form a cross dipole arm, the rear surfaces of the third dielectric plate and the fourth dielectric plate are printed with a feeder line, the radiation patches are connected with the feeder line through probes, the self-phase-shifting dipole arms are connected with the cross dipole arms through probes, the lower side surface of the second dielectric plate is provided with a feed network, the fence-shaped dielectric plate is arranged around the periphery of the second dielectric plate, and the fence-shaped dielectric plate is provided with a plurality of gaps. The antenna structure is beneficial to enhancing the directivity and low elevation gain of the antenna.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a double-cross broadband high-low elevation gain satellite navigation terminal antenna.
Background
Global Positioning System (GPS) has been a popular research topic due to its wide range of applications such as positioning, navigation and clock synchronization. Typically, GPS antennas require Right Hand Circular Polarization (RHCP), wide beamwidth and high antenna gain at low elevation angles. The GPS receiver needs to receive signals from at least four satellites to determine a 3D position. Broadband antennas can effectively increase coverage and receive signals even at low elevation angles. The prior art has investigated different Circularly Polarized (CP) antennas for GPS applications. For example, quadrifilar helix antennas providing a very broad cardioid radiation pattern have been widely used. The shape of the radiation pattern can be controlled by varying the number of turns and the ratio of the helical length to the diameter. However, it is difficult to precisely manufacture the spiral structure. This can be a problem because its antenna performance is sensitive to manufacturing errors of structural asymmetry and feed imbalance. Many microstrip GPS antennas have been designed in the prior art because of their low profile and simple structure. However, their beamwidth is not very wide and their antenna gain decreases dramatically at low elevation angles. For example, they have an elevation angle θ=85° below 0 dBic, some even below-5 dBic. The prior art has disclosed CP mode diversity antennas for upper hemispherical coverage. Its omni-directional port can provide a gain θ=90° of about 1 dBic, increasing system complexity due to its dual port structure. In this communication, single port wide beam cross dipole antennas with enhanced low elevation gain were investigated. The antenna consists of four pairs of printed dipoles fed by two orthogonal and orthogonal currents to produce the RHCP field. The bent dipole and ground plane may enhance low elevation gain. The low elevation gain is further enhanced by using a box cavity with slanted slots. ANSYS HFSS is used to simulate an antenna, prototypes are made and measured to verify the simulation. The antenna operates in the GPS L1 and BD B1 frequency bands and has good impedance matching and an Axial Ratio (AR). It has a wider 3 dB AR beamwidth and 3 dB gain beamwidth. Its analog and measured antenna gain is θ=70°, the right hand is 1.2dBic, and higher than the negative values common in existing GPS antennas.
Disclosure of Invention
The invention aims to provide a double-cross broadband high-low elevation gain satellite navigation terminal antenna, and the antenna structure is beneficial to enhancing the directivity and low elevation gain of the antenna.
In order to achieve the above purpose, the technical scheme of the invention is as follows: the utility model provides a two cross broadband high low elevation gain satellite navigation terminal antennas, includes first, second, third, fourth dielectric plate and rail form dielectric plate, parallel arrangement about first dielectric plate and the second dielectric plate, third dielectric plate and fourth dielectric plate cross and vertically set up between first dielectric plate and second dielectric plate, first dielectric plate upper surface printing has the radiation paster that comprises two pairs of self-phase shift dipole arms, the front surface printing of third dielectric plate and fourth dielectric plate has the radiation paster that has the dipole arm to form the cross dipole arm when third dielectric plate and fourth dielectric plate cross setting, the rear surface printing of third dielectric plate and fourth dielectric plate has the feeder, and the radiation paster passes through the probe with the feeder and is connected, the cross dipole arm that follows on first dielectric plate and third, the fourth dielectric plate passes through the probe and is connected, the second dielectric plate downside is equipped with the feed network, the through on the third, the fourth dielectric plate passes through the probe and is connected with the rail form dielectric plate, the rail form is located to the rail form the panel, the rail form the dielectric plate is located to the rail.
Further, the 4 self-phase-shifting dipole arms on the upper surface of the first dielectric plate are of a bent structure, so that the impedance bandwidth and the axial ratio bandwidth of the antenna are increased.
Further, the dipole arms on the front surfaces of the third dielectric plate and the fourth dielectric plate are of bent structures, so that the impedance bandwidth and the axial ratio bandwidth of the antenna are increased.
Further, the radiation patches of the third dielectric plate and the fourth dielectric plate comprise dipole arms and radiators arranged below the dipole arms.
Further, the feeder lines on the rear surfaces of the third dielectric plate and the fourth dielectric plate are of an inverted L-shaped structure, the upper ends of the feeder lines of the inverted L-shaped structure are connected with the radiation patch through the probes, and the lower ends of the feeder lines of the inverted L-shaped structure are connected with the feed network through the probes.
Further, the feed network is implemented by a T-shaped power divider, and an edge of the feed network is provided with a port.
Compared with the prior art, the invention has the following beneficial effects: the dual-cross broadband high-low elevation gain satellite navigation terminal antenna is provided, and the directivity and the ground elevation gain of the antenna are enhanced by arranging the fence-shaped dielectric plates through the novel structural design of each dielectric plate and the dipole arms on the dielectric plates. The antenna has better low elevation gain and good directivity, and is suitable for being applied to navigation equipment.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present invention.
Fig. 2 is a diagram of a feed network in an embodiment of the invention.
Fig. 3 is a front view of a third dielectric plate in an embodiment of the present invention.
Fig. 4 is a rear view of a third dielectric plate in an embodiment of the present invention.
Fig. 5 is a front view of a fourth dielectric sheet in an embodiment of the present invention.
Fig. 6 is a rear view of a fourth dielectric sheet in an embodiment of the present invention.
Fig. 7 is a bottom view of a first dielectric plate in an embodiment of the present invention.
In the figure, 1-a first dielectric plate; 2-a second dielectric plate; 3-a third dielectric plate; 4-a fourth dielectric plate; 5-a rail-shaped dielectric plate; 6-self phase shifting dipole arms; 7-crossed dipole arms; 8-probe; 9-probe; 10-probe; 11-a feed network; 12-feeder lines; 13-gaps; 14-a radiator; 15-port.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific examples.
The invention provides a double cross broadband high-low elevation gain satellite navigation terminal antenna, which as shown in figure 1, comprises a first dielectric plate 1, a second dielectric plate 2, a third dielectric plate 3, a fourth dielectric plate 4 and a fence-shaped dielectric plate 5, wherein the first dielectric plate 1 and the second dielectric plate 2 are arranged in parallel up and down, the third dielectric plate 3 and the fourth dielectric plate 4 are crisscrossed and vertically arranged between the first dielectric plate 1 and the second dielectric plate 2, the upper surface of the first dielectric plate 1 is printed with a radiation patch formed by two pairs of self-phase-shifting dipole arms 6, the front surfaces of the third dielectric plate 3 and the fourth dielectric plate 4 are printed with radiation patches with dipole arms, when the third dielectric plate 3 and the fourth dielectric plate 4 are arranged in a crossing mode, a crisscross dipole arm 7 is formed, feeder lines 12 are printed on the rear surfaces of the third dielectric plate 3 and the fourth dielectric plate 4, radiation patches are connected with the feeder lines 12 through probes 9, the self-phase-shifting dipole arm 6 on the first dielectric plate 1 is connected with the crisscross dipole arms 7 on the third dielectric plate 3 and the fourth dielectric plate 4 through probes 8, a feed network 11 is arranged on the lower side surface of the second dielectric plate 2, the feeder lines 12 on the third dielectric plate 3 and the fourth dielectric plate 4 are connected with the feed network 11 through probes 10, the fence-shaped dielectric plate 5 is arranged on the periphery of the second dielectric plate 2 in a surrounding mode, the inner side surface of the fence-shaped dielectric plate 5 is a radiation surface, and a plurality of gaps 13 are formed in the fence-shaped dielectric plate.
In this embodiment, the 4 self-phase-shifting dipole arms on the upper surface of the first dielectric plate 1 are all in a bent structure, so as to increase the impedance bandwidth and the axial ratio bandwidth of the antenna. The 4 dipole arms are different in size, but symmetrical in structure, so that the self-phase shift of the antenna is realized, and the impedance bandwidth and the axial ratio bandwidth of the antenna are increased through the adjustment of the sizes of the dipole arms.
The radiation patches of the third dielectric plate 3 and the fourth dielectric plate 4 comprise dipole arms and a radiator 14 arranged below the dipole arms, the dipole arms on the front surfaces of the third dielectric plate 3 and the fourth dielectric plate 4 are of bent structures so as to increase the impedance bandwidth and the axial ratio bandwidth of the antenna, and the radiator 14 is semicircular or of other shapes. The feeder line 12 on the rear surfaces of the third dielectric plate 3 and the fourth dielectric plate 4 is of an inverted L-shaped structure, the upper end of the feeder line of the inverted L-shaped structure is connected with the radiation patch through the probe 9, and the lower end of the feeder line of the inverted L-shaped structure is connected with the feed network 11 through the probe 10.
The shape of the gap 13 on the fence-shaped dielectric plate 5 is not unique, and the gap can be in various structures such as an inclined structure, a vertical structure, a bent structure, an arc structure and the like, and the width of the gap is 4-6mm. The fence-like dielectric plate with the inclined slot can help the antenna achieve better directivity.
The feed network 11 is implemented with a T-shaped power divider, the edge of the feed network 11 having one port 15.
In the embodiment, the first, second, third and fourth dielectric plates are respectively made of integrated IT-8350G dielectric substrates, the fence-shaped dielectric plates are made of FR4 dielectric substrates, and the inner walls of the fence-shaped dielectric plates are designed to be radiation surfaces.
In this embodiment, the dimensions of the antenna are 90mm x 70mm. The specific dimensions are as follows: the third dielectric plate and the fourth dielectric plate have the same height and width, the width is 50mm, and the height is 70mm. The size of the fence-shaped dielectric plate is 90mm by 51mm. The thickness of the integrated IT-8350G dielectric substrate is 0.5mm, and the thickness of the FR4 dielectric substrate is 0.8mm. The width range of the self-phase-shifting dipole arm is 1-5mm, the length is the sum of three bending sections, the first section range is 10-22mm, the second section range is 10-22mm, the third section range is 3-12mm, and the width of a gap on the fence-shaped medium plate is 4-6mm. The specific dimensions are selected according to design requirements. In this embodiment, the feed network selects a T-shaped power divider to implement circular polarization.
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 (4)
1. The dual-cross broadband high-low elevation gain satellite navigation terminal antenna is characterized by comprising a first dielectric plate, a second dielectric plate, a third dielectric plate, a fourth dielectric plate and a fence-shaped dielectric plate, wherein the first dielectric plate and the second dielectric plate are arranged up and down in parallel;
the radiation patches of the third dielectric plate and the fourth dielectric plate comprise dipole arms and radiators arranged below the dipole arms;
the feeder lines on the rear surfaces of the third dielectric plate and the fourth dielectric plate are of an inverted L-shaped structure, the upper ends of the feeder lines of the inverted L-shaped structure are connected with the radiation patch through the probes, and the lower ends of the feeder lines of the inverted L-shaped structure are connected with the feed network through the probes.
2. The dual-cross broadband high-low elevation gain satellite navigation terminal antenna according to claim 1, wherein the 4 self-phase-shifting dipole arms on the upper surface of the first dielectric plate are all of a bent structure so as to increase the impedance bandwidth and the axial ratio bandwidth of the antenna.
3. The dual-cross broadband high-low elevation gain satellite navigation terminal antenna according to claim 1, wherein dipole arms on front surfaces of the third dielectric plate and the fourth dielectric plate are of a bent structure so as to increase impedance bandwidth and axial ratio bandwidth of the antenna.
4. The dual-cross broadband high-low elevation gain satellite navigation terminal antenna of claim 1, wherein the feed network is implemented with a T-shaped power divider, and an edge of the feed network has one port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910668185.6A CN110265779B (en) | 2019-07-23 | 2019-07-23 | Dual-cross broadband high-low elevation gain satellite navigation terminal antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910668185.6A CN110265779B (en) | 2019-07-23 | 2019-07-23 | Dual-cross broadband high-low elevation gain satellite navigation terminal antenna |
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| CN110265779A CN110265779A (en) | 2019-09-20 |
| CN110265779B true CN110265779B (en) | 2024-02-06 |
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| CN201910668185.6A Active CN110265779B (en) | 2019-07-23 | 2019-07-23 | Dual-cross broadband high-low elevation gain satellite navigation terminal antenna |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111430931B (en) * | 2020-04-01 | 2022-01-11 | 武汉虹信科技发展有限责任公司 | Radiation sheet for broadband antenna and broadband antenna |
| CN112821055B (en) * | 2021-01-05 | 2022-07-15 | 上海安费诺永亿通讯电子有限公司 | Single-port dual-frequency dual-polarization omnidirectional antenna applied to WIFI |
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2019
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| CN110265779A (en) | 2019-09-20 |
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