A Circularly Polarized Microstrip Antenna Using a Wave-shaped Slot Structure

Abstract

The invention relates to a circularly polarized micro-strip antenna adopting a wave-shaped groove structure, which is used for reducing the size of the antenna, expanding application occasions, reducing the processing cost and meeting the demands of the antenna. The micro-strip antenna adopts a coaxial feed structure and comprises a dielectric substrate, a metal floor and a metal patch with a groove structure, wherein the metal patch is positioned on the upper surface of the dielectric substrate, the groove structure comprises eight wave-shaped grooves and four square connecting grooves, two wave-shaped grooves which are in mutual mirroring and in one group are selected from the eight wave-shaped grooves as the standard, the other six wave-shaped grooves can be obtained by rotating the group of wave-shaped grooves which are in the mutual mirroring around the central position of the metal patch 90 degrees, 180 degrees and 270 degrees, and the four square connecting grooves are used for connecting the two wave-shaped grooves which are adjacent but not in mirroring. The circularly polarized micro-strip antenna has the advantages of reduced size and lowered processing cost.

Description

technical field [0001] The invention relates to a microstrip antenna with a slot structure, in particular to a circularly polarized microstrip antenna with a wave-shaped slot structure. Background technique [0002] With the vigorous development of communication technology, various communication products and technologies have sprung up like mushrooms after rain. The technology of integrated circuits is becoming more and more mature, so that the volume of products is gradually thinner and smaller. For the antenna used to transmit and receive signals in communication products, its size is directly related to whether the communication product can achieve the goal of being thin, light and small. [0003] The antenna is a component used to transmit or receive electromagnetic waves. Generally, the characteristics of the antenna can be obtained from parameters such as operating frequency, radiation pattern (Radiation Pattern), reflection coefficient (Return Loss) and antenna gain ...

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Problems solved by technology

[0004] According to the current retrieval findings, Richard et al. designed a small microstrip antenna. By loading a C-shaped ring in the half-wavelength slot, the antenna size is reduced by 50%, but the degree of freedom for optimization is small, so the surface utilization of the metal patch Low; Ojaroudi et al. designed an ultra-broadband planar monopole antenna with an inverted T-slot structure, which has better omnidirectional radiation performance and a 36% reduction in size, but the curve form is too simple, and the T-slot line is close to the edge of the metal patch, further reducing The size is limited; Chi et al. periodically load parallel capacitors on the slow-wave structure, which reduces the antenna size by 44%, but the processing cost is high; Mustafa uses Minskowski fractal structure, the antenna size is reduced by 33.6%, but the right-angled corners are opposite to the surface current. Produces strong reflection, which is not conducive to antenna matching

[0005] At present, scholars at home and abroad mostly pay attention to the design method of the groove structure itself or the shape improvement of the metal patch. The design of the groove structure itself is biased towards different combinations of straight groove structures or simple curved groove structures. Portfolio of research reports

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