Circularly polarized microstrip antenna and wireless device

Abstract

The invention discloses a circularly polarized microstrip antenna which comprises a patch array, a feed network, a substrate, and a floor. One face of the substrate is provided with a regular N-polygon metal patch which is in single-point connection with an array microstrip line. When voltage is introduced to the feed network, positive charges gather on the regular N-polygon metal patch, two degenerate modes with orthogonal polarization, equal amplitude and a certain phase difference can be generated. Negative charges gather on the edge of a regular N-polygon hole in the floor on the other face of the substrate, which forms capacitance load with the regular N-polygon metal patch. A rectangular patch plays the roles of increasing propagation path of current and increasing impedance and forms inductance load with a regular N-polygon metal patch coupling short circuit. Separation of resonant frequencies of the two degenerate modes is generated, the impedance phase angle of one mode leadsby 45 degrees, and the impedance phase angle of the other mode lags by 45 degrees, and circularly polarized radiation is formed. The circularly polarized microstrip antenna has the advantages of beingsimple in structure, easy to integrate, process and develop, good in circular polarization performance, and the like.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a microstrip circularly polarized antenna and a wireless device. Background technique [0002] The antenna is a transformer that can convert the guided wave propagating on the transmission line into an electromagnetic wave propagating in free space, or on the contrary, it plays an important role in transmitting or receiving electromagnetic waves in radio equipment. Circularly polarized antennas and microstrip antennas are commonly used antenna forms. Among them, circularly polarized antennas can achieve circularly polarized radiation, which is not only beneficial to the reception of space electromagnetic waves, but also has the ability to suppress cloud and rain interference and anti-multipath reflection. Advantages; microstrip antennas have the advantages of simple structure, convenient processing, low cost, low profile, easy to conform to the carrier, easy to integrate wit...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a microstrip circularly polarized antenna, which can simultaneously overcome the shortcomings of the microstrip circularly polarized antenna, such as complex structure, difficult processing, slow simulation speed and poor circular polarization performance.

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