A Printed Antenna with Low Profile Reflecting Aperture Structure for Small Antennas
A technology for printing antennas and small antennas, which is applied to antenna grounding switch structure connection, radiation element structure, antenna and other directions, and can solve problems such as false targets, unfavorable near-field target detection, and large backlobe effects
Active Publication Date: 2021-06-08
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
[0004] Most of the existing microstrip antennas used on a large scale adopt the traditional three-layer structure. The radiation unit is generally on the top layer, and the reference ground is on the bottom layer. , will often produce a large back lobe effect. For handheld radar detection equipment, it will often produce a large back echo. During the detection process, false targets will appear, which is not conducive to the detection of near-field targets. Therefore, the traditional low-profile Microstrip antennas are difficult to meet the needs of actual use
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[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It should be emphasized that the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. example. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0025] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the prese...
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Abstract
The invention designs a low-profile reflective aperture surface structure printed antenna for small antennas, which has the antenna characteristics of wide beam, wide frequency band, high front-to-back ratio, and low profile miniaturization, and relates to the technical field of antennas. A printed antenna invented to solve the problem that existing microstrip antennas cannot simultaneously achieve broadband, wide beam, high front-to-back ratio, small size and low profile. The printed antenna of the present invention adopts a multi-layer structure, the top layer adopts a printed circuit board structure, and the upper and lower layers adopt a coupled microstrip line structure; the middle layer is a closed metal cavity filled with insulating foam, which contains a coaxial wire for feeding line; the bottom adopts the microstrip structure to carry out the feed conversion of the microstrip to the coaxial line, forming a parallel feed mode with a low profile and a large height difference. The invention can be used for near-field hand-held radar detection equipment and small mobile base stations.
Description
technical field [0001] The invention relates to the technical field of antennas, in particular to a printed antenna with a low-profile reflection aperture structure for small antennas. Background technique [0002] Printed antenna has the advantages of small thickness, controllable dielectric constant, relatively simple structure and good processing performance, so it has been widely used. Printed antennas include many structural forms. From the perspective of composition, traditional printed antennas mainly include two basic components, namely, the radiating unit and the feeding structure. [0003] The application scenario targeted by the solution of the present invention is a wide-band, low-profile printed circuit board antenna for near-field portable detection radar, the working center frequency is around 3.3GHz, and the distance from the top layer to the bottom layer of the antenna thickness is not more than 16mm. [0004] The existing large-scale microstrip antennas mo...
Claims
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IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50H01Q9/16H01Q19/13
CPCH01Q1/38H01Q1/48H01Q1/50H01Q9/16H01Q19/13
Inventor 周建明皮维超张磊董涛李兴旺
Owner BEIJING INSTITUTE OF TECHNOLOGYGY