CN109687133B - Miniaturized big dipper satellite terminal antenna - Google Patents
Miniaturized big dipper satellite terminal antenna Download PDFInfo
- Publication number
- CN109687133B CN109687133B CN201910014139.4A CN201910014139A CN109687133B CN 109687133 B CN109687133 B CN 109687133B CN 201910014139 A CN201910014139 A CN 201910014139A CN 109687133 B CN109687133 B CN 109687133B
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- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 title claims description 3
- 230000005855 radiation Effects 0.000 claims abstract description 32
- 239000000758 substrate Substances 0.000 claims description 30
- 230000010287 polarization Effects 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 8
- 239000004020 conductor Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004088 simulation Methods 0.000 description 4
- 230000005684 electric field Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 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
-
- 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
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/24—Polarising devices; Polarisation filters
-
- 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
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Abstract
The invention provides a miniaturized Beidou satellite terminal antenna, which comprises a radiation layer and a feed layer, wherein the radiation layer is arranged on the antenna; the radiation layer comprises four radiation vibrators and four L-shaped branches distributed in a square area; the radiation vibrator is in a convex shape; the four radiating oscillators have the same specification and are distributed at four sides of the square area; the L-shaped branch is positioned in the middle of the square area and surrounds the center of the square area; the right-angle ends of the four L-shaped branches face the four corners of the square area; a feed network is arranged at the feed layer; the feed network is connected with the radiation oscillator; the invention has compact structure and can improve the utilization ratio of the design size of the antenna.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a miniaturized Beidou satellite terminal antenna.
Background
The satellite navigation antenna is actually a circular polarization antenna, wherein polarization refers to the direction of an electric field of electromagnetic waves radiated by the antenna, when the magnitude of the electric field is not changed with time, but the direction is changed with time, the resultant electric field vector end track is circular, and if the angular velocity meets the right-hand spiral law, the circular polarization is right-hand circular polarization. In the prior art, four ports are sequentially subjected to 90-degree phase difference by a quarter feed network, so that the circular polarization effect is realized. The length of the radiating element of the antenna is determined by the center frequency, and reaches the maximum resonance state when the length is one quarter wavelength
In the prior art, a mode of feeding network and radiating oscillator is generally adopted when a miniaturized Beidou satellite terminal antenna is designed. The feed network is composed of three Wilkinson power dividers, wherein two power dividers respectively realize phase differences of 90 degrees, and then a third power divider is used for realizing phase differences of 180 degrees and is connected with the first two power dividers, so that the four ports are sequentially delayed by 90 degrees.
In the prior art, because three Wilkinson power dividers are combined with a feed network, a large amount of size area is occupied, and because the phase delay lines of the power dividers are smaller in distance, coupling is easy to occur, so that energy is concentrated in the antenna and cannot radiate. The single detour of the radiating elements also causes coupling effects of the radiating elements to each other.
Disclosure of Invention
The invention provides a miniaturized Beidou satellite terminal antenna which is compact in structure and capable of improving the utilization rate of the design size of the antenna.
The invention adopts the following technical scheme.
A miniaturized Beidou satellite terminal antenna comprises a radiation layer and a feed layer; the radiation layer comprises four radiation vibrators and four L-shaped branches distributed in a square area; the radiation vibrator is in a convex shape; the four radiating oscillators have the same specification and are distributed at four sides of the square area; the L-shaped branch is positioned in the middle of the square area and surrounds the center of the square area; the right-angle ends of the four L-shaped branches face the four corners of the square area; a feed network is arranged at the feed layer; the feed network is connected with the radiating oscillator.
The top surface of the antenna is a square first dielectric substrate, and the bottom surface of the antenna is a second dielectric substrate; the radiating oscillator and the L-shaped branches of the radiating layer are arranged on the upper surface of the first dielectric substrate; the feed network of the feed layer is arranged on the upper surface of the second dielectric substrate.
An air layer is arranged between the first medium substrate and the second medium substrate.
The feed network is connected with the radiating oscillator through a connecting transmission line.
The convex-shaped radiation oscillator is a section of spiral fold line formed by connecting a plurality of L-shaped conductors end to end; the beginning section of the fold line is connected with the board edge of the base board position where the radiation vibrator is positioned; the end section of the fold line is parallel to and is close to the plate edge of the substrate where the radiating oscillator is located.
The top view of the feed network is rectangular; four feed ports are respectively arranged at four corners of a feed network in rectangular distribution, and the feed ports are connected to a broken line initial section of the radiating oscillator through connecting transmission lines; the adjacent feed ports have a feed phase delay of 90 degrees so that the antenna radiates right-hand circular polarization, and the line widths of all feed lines in the feed network are the same.
An antenna in operation may have a maximum resonance at 1.561 GHz.
The dimensions of the antenna are 50mm by 7.5mm.
The thickness of the first medium substrate and the second medium substrate is 0.5mm, and the height of the air layer is 6mm; the length of the radiating oscillator is 48.2, and the line width is 1.5mm; the overall size of the feed network is 31mm 35mm, uniform 1.25mm line width is adopted, and adjacent feed ports realize 90-degree phase delay through different feed line lengths; the width of the L-shaped branch is 1mm, and the lengths of two sections of lines of the L-shaped branch are 2.8mm and 2mm respectively.
The invention has the advantages that:
1. in the invention, the novel feed network achieves a compact delay of 90 ° sequential phase, which is smaller in size than existing Wilkinson feed networks. Compared with the traditional feed network adopting a multi-section feed line for impedance conversion, the feed line of the feed network in the application only adopts single-stage transition, so that the width of the transmission line of the whole feed network is uniform, the layout is neat and compact, and the coupling is greatly reduced.
2. In the invention, the radiating oscillator adopts a spiral bending detour mode, and compared with the existing radiating oscillator with a single straight line, the utilization ratio of the area size is improved, thereby realizing the effect of miniaturization. In addition, the bypass mode of the radiating oscillator reduces the coupling influence between the radiating oscillator and the radiating oscillator while the size is compressed.
3. The L-shaped branch joint added in the invention introduces coupling with the radiating oscillator, thereby being beneficial to improving the circular polarization effect and the radiation efficiency of the antenna.
Drawings
The invention is described in further detail below with reference to the attached drawings and detailed description:
FIG. 1 is a schematic illustration of the present invention in cross-section;
FIG. 2 is a schematic top view of a radiation layer;
FIG. 3 is a schematic top view of a feed layer;
FIG. 4 is a schematic diagram of reflection coefficient simulation results;
FIG. 5 is a schematic diagram of the results of an axial ratio simulation;
FIG. 6 is a schematic view of the XOZ plane direction of the radiation simulation;
FIG. 7 is a 3D schematic view of a radiation simulation;
in the figure: 1-a first dielectric substrate; 2-a second dielectric substrate; 3-connecting a transmission line; 4-a feed port; 5-radiating an oscillator; a 6-feed network; 7-L-shaped branches; 101-a broken line initial section of a radiation oscillator; 102-the end of the broken line of the radiating oscillator.
Detailed Description
As shown in fig. 1-7, a miniaturized Beidou satellite terminal antenna comprises a radiation layer and a feed layer; the radiation layer comprises four radiation vibrators 5 and four L-shaped branches 7 which are distributed in a square area; the radiation vibrator is in a convex shape; the four radiating oscillators have the same specification and are distributed at four sides of the square area; the L-shaped branch is positioned in the middle of the square area and surrounds the center of the square area; the right-angle ends of the four L-shaped branches face the four corners of the square area; a feed network 6 is arranged at the feed layer; the feed network is connected with the radiating oscillator.
The top surface of the antenna is a square first dielectric substrate 1, and the bottom surface of the antenna is a second dielectric substrate 2; the radiating oscillator and the L-shaped branches of the radiating layer are arranged on the upper surface of the first dielectric substrate; the feed network of the feed layer is arranged on the upper surface of the second dielectric substrate.
An air layer is arranged between the first medium substrate and the second medium substrate.
The feed network is connected to the radiating element with a connecting transmission line 3.
The convex-shaped radiation oscillator is a section of spiral fold line formed by connecting a plurality of L-shaped conductors end to end; the starting section 101 of the fold line is connected with the board edge of the substrate part where the radiation oscillator is positioned; the end segment 102 of the fold line is parallel to and immediately adjacent to the edge of the substrate where the radiating element is located.
The top view of the feed network is rectangular; four feed ports 4 are respectively arranged at four corners of the feed network in rectangular distribution, and the feed ports are connected to the beginning section of the broken line of the radiating oscillator through connecting transmission lines; the adjacent feed ports have a feed phase delay of 90 degrees so that the antenna radiates right-hand circular polarization, and the line widths of all feed lines in the feed network are the same.
An antenna in operation may have a maximum resonance at 1.561 GHz.
The dimensions of the antenna are 50mm by 7.5mm.
The thickness of the first medium substrate and the second medium substrate is 0.5mm, and the height of the air layer is 6mm; the length of the radiating oscillator is 48.2, and the line width is 1.5mm; the overall size of the feed network is 31mm 35mm, uniform 1.25mm line width is adopted, and adjacent feed ports realize 90-degree phase delay through different feed line lengths; the width of the L-shaped branch is 1mm, and the lengths of two sections of lines of the L-shaped branch are 2.8mm and 2mm respectively.
In this case, the key to the feed network design is in the form of a single stage transition, i.e., ensuring consistent linewidth for each feed line, the overall size of the feed network is approximately λ g /4*λ g /4,λ g If the bandwidth is further enlarged, the distance between the wires of the feeding network can be increased, but the size is also increased.
In the embodiment, the coupling distance between the L-shaped branch and the radiating oscillator has great influence on the radiation axis ratio of the antenna, and the circular polarization effect of the antenna radiation can be improved by adjusting the position and the size of the L-shaped branch.
In this case, the bypassing mode of the radiating element is related to the size and coupling strength of the antenna, and the too narrow space can cause mutual interference between the ports to affect the circular polarization effect, so that the radiating element is not necessarily wound densely.
Claims (7)
1. A miniaturized big dipper satellite terminal antenna, its characterized in that: the antenna comprises a radiation layer and a feed layer; the radiation layer comprises four radiation vibrators and four L-shaped branches distributed in a square area; the radiation vibrator is in a convex shape; the four radiating oscillators have the same specification and are distributed at four sides of the square area; the L-shaped branch is positioned in the middle of the square area and surrounds the center of the square area; the right-angle ends of the four L-shaped branches face the four corners of the square area; a feed network is arranged at the feed layer; the feed network is connected with the radiation oscillator;
the convex-shaped radiation oscillator is a section of spiral fold line formed by connecting a plurality of L-shaped conductors end to end; the beginning section of the fold line is connected with the board edge of the base board position where the radiation vibrator is positioned; the end section of the fold line is parallel to and is close to the plate edge of the substrate where the radiating oscillator is positioned;
the top view of the feed network is rectangular; four feed ports are respectively arranged at four corners of a feed network in rectangular distribution, and the feed ports are connected to a broken line initial section of the radiating oscillator through connecting transmission lines; the adjacent feed ports have a feed phase delay of 90 degrees so that the antenna radiates right-hand circular polarization, and the line widths of all feed lines in the feed network are the same.
2. The miniaturized Beidou satellite terminal antenna of claim 1, wherein: the top surface of the antenna is a square first dielectric substrate, and the bottom surface of the antenna is a second dielectric substrate; the radiating oscillator and the L-shaped branches of the radiating layer are arranged on the upper surface of the first dielectric substrate; the feed network of the feed layer is arranged on the upper surface of the second dielectric substrate.
3. A miniaturized Beidou satellite terminal antenna according to claim 2, wherein: an air layer is arranged between the first medium substrate and the second medium substrate.
4. A miniaturized Beidou satellite terminal antenna according to claim 2, wherein: the feed network is connected with the radiating oscillator through a connecting transmission line.
5. The miniaturized Beidou satellite terminal antenna of claim 1, wherein: the antenna in operation is maximally resonant at 1.561 GHz.
6. The miniaturized Beidou satellite terminal antenna of claim 1, wherein: the dimensions of the antenna are 50mm by 7.5mm.
7. A miniaturized Beidou satellite terminal antenna according to claim 2, wherein: the thickness of the first medium substrate and the second medium substrate is 0.5mm, and the height of the air layer is 6mm; the length of the radiating oscillator is 48.2mm, and the line width is 1.5mm; the overall size of the feed network is 31mm 35mm, uniform 1.25mm line width is adopted, and adjacent feed ports realize 90-degree phase delay through different feed line lengths; the width of the L-shaped branch is 1mm, and the lengths of two sections of lines of the L-shaped branch are 2.8mm and 2mm respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910014139.4A CN109687133B (en) | 2019-01-08 | 2019-01-08 | Miniaturized big dipper satellite terminal antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910014139.4A CN109687133B (en) | 2019-01-08 | 2019-01-08 | Miniaturized big dipper satellite terminal antenna |
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| Publication Number | Publication Date |
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| CN109687133A CN109687133A (en) | 2019-04-26 |
| CN109687133B true CN109687133B (en) | 2024-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910014139.4A Active CN109687133B (en) | 2019-01-08 | 2019-01-08 | Miniaturized big dipper satellite terminal antenna |
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