Microstrip patch antenna with spiral structures

Abstract

A microstrip patch antenna with spiral structures comprises a metal ground, a substrate and a metal radiation layer that are stacked, wherein the metal radiation layer comprises a feed structure and at least two spiral structures that are nested with each other and made of metal materials, the centers of the spiral structures converge on the feed structure, and the metal ground is further providedwith spiral notches that are nested with each other and take the center of the feed structure as the symmetric center. According to the microstrip patch antenna with the spiral structures disclosed by the invention, by adjusting the sizes of the upper and lower layers of spiral structures, including the width of each spiral structure, and the diameters, thread pitch, angular relationship and thelike of rotating structures, antenna parameters can be subjected to wide-band impedance matching. Therefore, no additional matching structure is required, and the structure itself has high consistencyand is easy to process. Moreover, due to the compression of the electrical length performed by the spiral structures, the electromagnetic signal transmission and reception in a wider spectral range can be realized by using a smaller antenna structure.

Description

technical field [0001] The invention relates to the communication field, in particular to a microstrip patch antenna with a helical structure. Background technique [0002] The existing microstrip patch antenna, by virtue of its planar structure, can be designed with a smaller profile, smaller size, and convenient integrated design structure, and its application ratio in various communication systems is gradually increasing. However, due to the limitations of its structure, the performance of traditional microstrip antennas is not satisfactory in terms of gain, directivity, surface wave, bandwidth and other performance. [0003] In view of the above defects, the existing technology usually adopts the loading coupling cavity to realize the miniaturization of the antenna; by adding matching resistance and reactance at the appropriate position of the antenna, the current distribution of the antenna is improved, and the matching of the resonant frequency is realized. However, n...

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Problems solved by technology

However, no matter whether the loading is achieved through active devices or passive devices, in the engineering, it will inevitably bring certain errors and interference at the loading end due to the process technology, which will destroy the consistency of the overall structure of the antenna, thus causing problems with the antenna to a certain extent. Deviation from Design Parameters

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