CN112234349A - Miniaturized broadband dual-polarized L-band satellite antenna - Google Patents
Miniaturized broadband dual-polarized L-band satellite antenna Download PDFInfo
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- CN112234349A CN112234349A CN202010987129.1A CN202010987129A CN112234349A CN 112234349 A CN112234349 A CN 112234349A CN 202010987129 A CN202010987129 A CN 202010987129A CN 112234349 A CN112234349 A CN 112234349A
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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
- 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
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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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Abstract
本发明公开了一种小型化宽频带双极化L波段卫通天线，主要解决现有小尺寸天线产品难以实现宽频带、双极化的问题。卫通天线，由三块介质板及空气层构成，分别为顶层介质板1、中间层介质板2、下层介质板3，所述空气层形成于顶层介质板1与中间层介质板2之间。所述中间层介质板2的接地网络一面与下层介质板3的接地网络一面相贴合连接，贴合后的中间层介质板2与下层介质板3通过四个定距金属螺柱4实现与顶层介质板1的电气连接。通过上述设计，本发明的卫通圆极化天线克服了陶瓷天线的窄带宽，低增益，低效率问题；同时突破了传统空气介质天线大尺寸，低增益，低端口隔离，组装难度大问题；实现了宽频，小型化，双极化的集合。
The invention discloses a miniaturized broadband dual-polarization L-band satellite communication antenna, which mainly solves the problem that the existing small-size antenna products are difficult to realize broadband and dual polarization. The satellite antenna is composed of three dielectric plates and an air layer, namely the top dielectric plate 1, the middle layer dielectric plate 2, and the lower layer dielectric plate 3. The air layer is formed between the top layer dielectric plate 1 and the middle layer dielectric plate 2. . One side of the grounding network of the intermediate layer dielectric board 2 is connected with the grounding network side of the lower layer dielectric board 3, and the laminated intermediate layer dielectric board 2 and the lower layer dielectric board 3 are connected to each other through four spaced metal studs 4. Electrical connections for top dielectric board 1. Through the above design, the satellite circularly polarized antenna of the present invention overcomes the problems of narrow bandwidth, low gain and low efficiency of ceramic antennas; at the same time, it breaks through the problems of large size, low gain, low port isolation and difficult assembly of traditional air dielectric antennas; A collection of broadband, miniaturization, and dual polarization has been achieved.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a miniaturized broadband dual-polarized L-band satellite antenna.
Background
The satellite communication antenna products mainly comprise two types, one type is a ceramic antenna, the ceramic material is mainly used as a base material, a double-point feed mode is mostly adopted, and a feed network is integrated on the back. Because the ceramic has higher dielectric constant, the antenna has narrower bandwidth and higher requirement on processing precision. Meanwhile, in order to realize small size, the feed network adopts an integrated 3dB bridge device. The ceramic antenna can be made to be smaller in size, but the scheme also has obvious defects, mainly manifested by narrower bandwidth, lower gain and lower radiation efficiency. Meanwhile, in the ceramic antenna scheme, in order to replace the physical size of the antenna, the corresponding working bandwidth, the antenna radiation efficiency and the antenna gain are sacrificed. The ceramic antenna has high requirements on the processing precision and consistency, the antenna is required to be corrected after production and assembly are finished, and the correction mode usually adopts a corner cutting method. This brings a certain burden to the antenna manufacturing process. Meanwhile, the ceramic (antenna radiation part) and the PCB (feed part) are fixed in a back adhesive mode, and the mode has the risk of falling off.
The other type is an air dielectric antenna, the traditional air dielectric antenna is divided into three parts, one part is a radiation unit layer, the middle layer is an air dielectric layer, the bottom layer is a feed network layer, and the bottom layer and the top layer are connected through a middle cross-shaped dielectric plate. The dielectric sheet has two main functions, one is used for supporting the top layer, and the other is used for connecting the top layer and the bottom layer. The radiation unit layer on the top layer comprises four antenna units, the antenna units adopt a traditional inverted-F shape, and the short circuit part of the inverted-F antenna is printed on the cross connection dielectric plate in the middle. The feed network layer is made of single-layer PCB plates, particularly a four-in-one Wilkinson power divider is adopted, constant-amplitude feeding of four units is achieved, phase difference is 90 degrees in sequence, and therefore the circular polarization characteristic of the antenna is achieved.
The traditional air dielectric antenna adopts the cross-shaped dielectric plate for connection and support, and the biggest problem of the mode is that the assembly is fine, the gap of the cross part needs to be aligned, meanwhile, the grounding part and the short circuit part need to be aligned, and the grounding part and the short circuit part need to be welded.
Disclosure of Invention
The invention aims to provide a miniaturized broadband dual-polarized L-band satellite antenna, which mainly solves the problem that the existing small-size antenna product is difficult to realize broadband and dual polarization.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a miniaturized broadband dual-polarized L-band satellite antenna comprises
The upper surface of the top dielectric plate is printed with an antenna radiation unit;
the antenna comprises an intermediate layer dielectric plate, an antenna feed network is printed on the upper surface of the intermediate layer dielectric plate, an antenna grounding network is printed on the lower surface of the intermediate layer dielectric plate, and eight metalized through holes are formed between the upper surface and the lower surface of the intermediate layer dielectric plate;
the antenna comprises a lower dielectric plate, an antenna grounding network is printed on the upper surface of the lower dielectric plate, an antenna feed network is printed on the lower surface of the lower dielectric plate, and four metallized through holes are formed between the upper surface and the lower surface of the middle dielectric plate;
the air layer is formed between the top dielectric plate and the middle dielectric plate;
one side of the grounding network of the middle-layer dielectric plate is attached to one side of the grounding network of the lower-layer dielectric plate, and the attached middle-layer dielectric plate and the attached lower-layer dielectric plate are electrically connected with the top-layer dielectric plate through four metal studs with certain distances;
the antenna feed network on the upper surface of the middle-layer dielectric plate is conducted with the antenna feed network on the lower surface of the lower-layer dielectric plate, and the formed integral antenna feed network is provided with two signal input ends and four signal output ends with the phase difference of 90 degrees in sequence, so that input signals are divided into four paths with equal amplitude.
Further, the feed network is extended by a two-stage 3dB bridge.
Further, a decoupling circuit is arranged in the feed network.
Furthermore, the top dielectric plate, the middle dielectric plate and the lower dielectric plate are made of TaconicRF-60 double-layer plates, the dielectric constant of the top dielectric plate, the dielectric plate of the middle layer and the dielectric plate of the lower layer are 6.15, and the thickness of the top dielectric plate, the dielectric plate of the middle layer and the dielectric plate of the lower layer are 0.64 mm; the double-layer plates are all made of 18um copper-clad plates, and the double-sided cloth is used for resistance welding.
Compared with the prior art, the invention has the following beneficial effects:
when the guard circularly polarized antenna is excited by feed signals with equal amplitudes and phase differences of 0 degrees, 90 degrees, 180 degrees and 270 degrees in 4 paths, the antenna can generate a relatively symmetrical radiation directional diagram. The antenna overcomes the problems of narrow bandwidth, low gain and low efficiency of the ceramic antenna; meanwhile, the problems of large size, low gain, low port isolation and high assembly difficulty of the traditional air dielectric antenna are solved; the broadband, miniaturized and dual-polarized set is realized.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a graph of transmit-receive isolation and return loss waveforms at 1.575GHz for an antenna of an embodiment of the present invention.
Fig. 3 is a pattern of an antenna of an embodiment of the present invention at 1.575 GHz.
Fig. 4 is an axial ratio plot at 1.575GHz for an antenna of an embodiment of the present invention.
Wherein, the names corresponding to the reference numbers are:
1-top dielectric plate, 2-middle dielectric plate, 3-lower dielectric plate, 4-spacing metal stud, 5-antenna radiation unit and 6-antenna feed network.
Detailed Description
The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.
Examples
As shown in fig. 1, the miniaturized wideband dual-polarized L-band satellite antenna disclosed by the invention comprises three dielectric plates, namely a top dielectric plate 1, an intermediate dielectric plate 2 and a lower dielectric plate 3, and an air layer formed between the top dielectric plate 1 and the intermediate dielectric plate 2. Three dielectric plates are made of TaconicRF-60 double-layer plates, the dielectric constant is 6.15, and the thickness is 0.64 mm; the double-layer plates are all made of 18um copper-clad plates, and the double-sided cloth is used for resistance welding.
Wherein, the upper surface of the top dielectric plate is printed with an antenna radiation unit 5. An antenna feed network 6 is printed on the upper surface of the middle-layer dielectric plate, an antenna grounding network is printed on the lower surface of the middle-layer dielectric plate, and eight metalized through holes are formed between the upper surface and the lower surface of the middle-layer dielectric plate. The upper surface of the lower dielectric plate is printed with an antenna grounding network, the lower surface of the lower dielectric plate is printed with an antenna feed network, and four metallized through holes are arranged between the upper surface and the lower surface of the middle dielectric plate.
One side of the grounding network of the middle-layer dielectric plate 2 is attached to one side of the grounding network of the lower-layer dielectric plate 3, and the attached middle-layer dielectric plate 2 and the lower-layer dielectric plate 3 are electrically connected with the top-layer dielectric plate 1 through four metal studs 4 at intervals.
The antenna feed network on the upper surface of the middle-layer dielectric plate is conducted with the antenna feed network on the lower surface of the lower-layer dielectric plate, and the formed integral antenna feed network is provided with two signal input ends and four signal output ends with the phase difference of 90 degrees in sequence, so that input signals are divided into four paths with equal amplitude, and the network can simultaneously input left-handed signals and right-handed signals. When the left-handed signal is input, the input signal is divided into four paths of signals with equal amplitude, and the phases of the signals are sequentially different by 90 degrees along the clockwise direction; when a right-hand signal is input, the input signal is divided into four paths of signals with equal amplitude, and the phases of the signals are sequentially different by 90 degrees along the counterclockwise direction.
As shown in FIGS. 2-4, the left-hand input and the right-hand input may produce clockwise and counterclockwise signal outputs, respectively. The inner product of these two outputs is 0, indicating that the two input signals are isolated from each other. Namely, the left-hand input and the right-hand input are not interfered with each other.
In order to maintain a stable phase within a wide band, the feed network employs a two-stage 3dB bridge extension.
In this embodiment, the left-hand circularly polarized antenna and the right-hand circularly polarized antenna can theoretically operate independently of each other. However, since the two antennas are integrated in a small space, there is strong coupling between the antennas, and the isolation index is drastically deteriorated. Therefore, in this embodiment, a decoupling circuit is added in the feeding network to reduce coupling between the antennas.
The antenna in this embodiment covers 1512-1586MHz and 1635-1700MHz, and respectively implements right-hand circular polarization and left-hand circular polarization. The antenna gain is greater than-4 dB from 1-84 DEG to +81 DEG within the 1518-1528MHz frequency band; greater than-4 dB within +/-75 ℃ in 1668 + 1675MHz frequency band; 1575.42 + -1.023 MHz band, greater than-3 dB in + -69 deg. The antenna axial ratio condition is: 1518 within the 1525MHz band, less than 8dB within +/-69 ℃; 1668-1675MHz band, less than 8dB from-69 deg to +66 deg; 1575.42 + -1.023 MHz band, less than 8dB in + -64 deg.
The whole frequency band of the antenna standing wave is less than or equal to 1.6, and the receiving and transmitting isolation is more than or equal to 8 dB; the mechanical size is less than or equal to 35 multiplied by 20 mm.
Fig. 2 to 4 show the port characteristic and the radiation characteristic of the antenna, respectively, for example, at a frequency of 1.575 GHz.
Through the design, when the satellite-communication circularly polarized antenna is excited by 4 paths of feed signals with equal amplitudes and phase differences of 0 degrees, 90 degrees, 180 degrees and 270 degrees, the antenna can generate a symmetrical radiation directional diagram. The antenna overcomes the problems of narrow bandwidth, low gain and low efficiency of the ceramic antenna; meanwhile, the problems of large size, low gain, low port isolation and high assembly difficulty of the traditional air dielectric antenna are solved; the broadband, miniaturized and dual-polarized set is realized. Therefore, the method has high use value and popularization value.
The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, but all the insubstantial modifications or changes made within the spirit and scope of the main design of the present invention, which still solve the technical problems consistent with the present invention, should be included in the scope of the present invention.
Claims (4)
1. A miniaturized broadband dual-polarized L-band satellite antenna is characterized by comprising
The antenna comprises a top dielectric plate (1), wherein an antenna radiation unit (5) is printed on the upper surface of the top dielectric plate;
the antenna comprises an intermediate layer dielectric plate (2), an antenna feed network (6) is printed on the upper surface of the intermediate layer dielectric plate, an antenna grounding network is printed on the lower surface of the intermediate layer dielectric plate, and eight metalized through holes are formed between the upper surface and the lower surface of the intermediate layer dielectric plate;
the antenna comprises a lower dielectric plate (3), an antenna grounding network is printed on the upper surface of the lower dielectric plate, an antenna feed network is printed on the lower surface of the lower dielectric plate, and four metalized through holes are formed between the upper surface and the lower surface of the middle dielectric plate;
an air layer formed between the top dielectric plate (1) and the middle dielectric plate (2);
one side of the grounding network of the middle-layer dielectric plate (2) is attached to one side of the grounding network of the lower-layer dielectric plate (3), and the attached middle-layer dielectric plate (2) and the attached lower-layer dielectric plate (3) are electrically connected with the top-layer dielectric plate (1) through four metal studs (4) with intervals;
the antenna feed network on the upper surface of the middle-layer dielectric plate is conducted with the antenna feed network on the lower surface of the lower-layer dielectric plate, and the formed integral antenna feed network is provided with two signal input ends and four signal output ends with the phase difference of 90 degrees in sequence, so that input signals are divided into four paths with equal amplitude.
2. A miniaturized broadband dual-polarized L-band satellite antenna according to claim 1, characterized in that said feed network employs two 3dB bridge extensions.
3. The miniaturized broadband dual-polarized L-band satellite antenna as claimed in claim 2, wherein a decoupling circuit is arranged in the feed network.
4. The miniaturized broadband dual-polarized L-band satellite antenna as claimed in claim 3, wherein TaconicRF-60 double-layer plates are adopted by the top-layer dielectric plate (1), the middle-layer dielectric plate (2) and the lower-layer dielectric plate (3), the dielectric constant of the miniaturized broadband dual-polarized L-band satellite antenna is 6.15, and the thickness of the miniaturized broadband dual-polarized L-band satellite antenna is 0.64 mm; the double-layer plates are all made of 18um copper-clad plates, and the double-sided cloth is used for resistance welding.
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| CN202010987129.1A CN112234349B (en) | 2020-09-18 | 2020-09-18 | A miniaturized broadband dual-polarized L-band satellite communication antenna |
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| CN202010987129.1A CN112234349B (en) | 2020-09-18 | 2020-09-18 | A miniaturized broadband dual-polarized L-band satellite communication antenna |
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| CN112234349B CN112234349B (en) | 2025-03-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113437530A (en) * | 2021-07-06 | 2021-09-24 | 上海航天测控通信研究所 | Broadband miniaturized stripline dual-circular polarization network |
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| CN213660623U (en) * | 2020-09-18 | 2021-07-09 | 成都四威功率电子科技有限公司 | A miniaturized broadband dual-polarized L-band satellite communication antenna |
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2020
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| KR20060059437A (en) * | 2004-11-29 | 2006-06-02 | 주식회사 케이티프리텔 | Antenna device with dual polarized wave reception structure |
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| US20130044035A1 (en) * | 2010-09-07 | 2013-02-21 | Kunjie Zhuang | Dual-Polarized Microstrip Antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112234349B (en) | 2025-03-25 |
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