Dual-frequency-band slot antenna based on half-mode substrate integrated waveguide

Abstract

The invention discloses a dual-frequency-band slot antenna based on a half-mode substrate integrated waveguide. The dual-frequency-band slot antenna comprises a rectangular medium substrate and metal through holes, wherein the inner walls of the metal through holes are provided with electric conduction metal layers. The upper surface of the medium substrate is provided with an upper surface metal layer, a feed microstrip line and a half coplanar waveguide structure. The lower surface of the medium substrate is provided with a lower surface metal layer. A strip-shaped slot is formed in the lower surface metal layer, and the upper surface metal layer is connected with the lower surface metal layer through the electric conduction metal layers of the inner walls of the metal through holes. The through holes are distributed along the edge of the upper surface metal layer and define a semi-surrounding structure. The semi-surrounding structure composes a resonant cavity, and the feed microstrip line is located on the side of an opening of the resonant cavity and connected with the upper surface metal layer. The half coplanar waveguide structure provides matching impedance for the feed microstrip line and is connected with the feed microstrip line. The strip-shaped slot is located in the resonant cavity, and the length direction of the slot points to the opening of the resonant cavity. The dual-frequency-band slot antenna is small in size and strong in radiance performance.

Description

technical field [0001] The invention relates to a slot antenna, in particular to a dual-band slot antenna based on a half-mode substrate. Background technique [0002] In recent years, with the widespread use of wireless communication systems, a variety of wireless communication systems coexist in the market. In order to reduce costs and reduce electromagnetic coupling interference between antennas, the demand for antennas compatible with multiple frequency bands is becoming more and more urgent. At present, there are many studies on dual-band antennas. According to research, according to the antenna type, common dual-band antennas can be divided into the following types: dual-band microstrip antennas, dual-band conical horn antennas, dual-band vehicle whip antennas, and dual-band planar antennas. Inverted F-type (PIFA) antenna, dual-band printed monopole antenna, dual-band cylindrical antenna, dual-band parabolic antenna, etc., their working dual-band can be roughly divided...

AI Technical Summary

Problems solved by technology

Among them, the dual-band slot antenna with substrate integrated waveguide not only has dual-frequency characteristics, but also is easy to integrate with the plane; Due to the impedance mismatch problem during use, the energy loss of the antenna will be caused and the radiation performance of the antenna will be reduced.

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