A Surface Wave Antenna with High Gain, Low Profile and Wide Bandwidth
A surface wave, low-profile technology, applied in the field of surface wave antennas, can solve the problems of high antenna profile, difficult processing, narrow gain bandwidth, etc., and achieve the effect of low profile, high gain, and easy integration
Active Publication Date: 2022-03-29
SUN YAT SEN UNIV
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Problems solved by technology
[0003] The above-mentioned prior art 1 needs to gradually reduce the thickness of the dielectric waveguide, and this structure is not easy to process; because the above-mentioned existing technology 2 has a relatively large dispersion coefficient, it still has frequency scanning characteristics in essence, so the gain in the end-fire direction The bandwidth is relatively narrow; the above-mentioned prior art 3 needs air as a medium, so it is not easy to process in actual engineering; the above-mentioned prior art 4 uses the substrate integration method to realize the surface wave antenna, which is easy to integrate and simple to process, but the profile of the antenna is still higher
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[0039] Such as Figure 1 ~ Figure 4 As shown, a surface wave antenna with high gain, low profile and large bandwidth includes a microstrip feeder 2, an upper metal plate 5, an upper metal patch 3, a metal floor 6, a dielectric plate 1, and a short-circuit via hole 4; the microstrip feeder The wire 2, the upper metal plate 5 and the upper metal patch 3 are located on the upper surface of the dielectric board 1, and the metal floor 6 is located on the lower surface of the dielectric plate; the upper metal patch 3 is located in the middle of the upper surface, and the metal patch is composed of 5 rows of stickers The upper metal plate 5 is located on both sides of the metal patch 3; the short-circuit vias 4 are arranged along the edge of the upper metal plate 5 to form a gradual cavity; the antenna is fed through the microstrip feed 2 lines.
[0040] In this example, if figure 2 As shown, the upper metal patch 3, the metal patch is composed of 5 columns of small patches, the le...
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In order to solve the problem of difficult surface wave antenna processing, the present invention discloses a high-gain, low-profile, and large-bandwidth surface wave antenna, which includes a microstrip line, a first conductive plate, a dielectric plate, and several metal patches. The first conductive plate The plates are strip-shaped, symmetrically arranged on both sides of the upper surface of the dielectric board, the first conductive plate is connected to the dielectric board; the microstrip line is arranged at one end of the upper surface of the dielectric board, and the microstrip line is connected to the dielectric board The metal patch is arranged between the first conductive plates, and the metal patch is connected to the dielectric plate; the first conductive plate is provided with a number of via holes towards the edge of the metal patch, and the via holes form a gradual change cavity. The invention adopts coplanar waveguide and dielectric plate integration technology, which effectively reduces the antenna profile; solves the problem of difficult processing of traditional surface wave antennas, has the characteristics of easy integration, low profile and easy processing, and realizes high gain, 3dB larger Gain Bandwidth for Endfire Radiation.
Description
technical field [0001] The invention relates to the field of antennas, in particular to a surface wave antenna with high gain, low profile and large bandwidth. Background technique [0002] In the traveling wave antenna, due to the frequency scanning characteristic of the leaky wave antenna, the range of the end-fire part is usually too narrow, so the surface wave antenna is commonly used to realize the high-gain end-fire antenna. Existing dielectric-based surface wave antennas mainly have two structures: dielectric rod and dielectric plate. Gradually reducing the structural parameters of the dielectric rod along the propagation direction or gradually reducing the thickness of the dielectric plate can make the surface wave antenna obtain better radiation. performance. However, this gradient structure is not easy to process in actual engineering. Commonly used high-gain end-fire antenna implementation schemes are: 1. Gradient medium thickness surface wave antenna; 2. Leaky ...
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IPC IPC(8): H01Q1/38H01Q1/50
CPCH01Q1/38H01Q1/50
Inventor 梁家荣刘菊华
Owner SUN YAT SEN UNIV