C-wave-band miniature broadband wide-beam circular polarization microstrip antenna

Abstract

The invention discloses a C-wave-band miniature broadband wide-beam circular polarization microstrip antenna. The C-wave-band miniature broadband wide-beam circular polarization microstrip antenna iscomposed of a medium cavity layer, a parasitic layer, a connection layer, a radiation layer and a feed layer which are stacked up and are attached to one another in sequence from top to bottom. Circular polarization is achieved through double-point feed, a feed network adopts an equal-amplitude Wilkinson power divider which divides one into two and has the 90-degree phase position difference. Radiation of a grounded metal column is similar to that of a monopole antenna, the radiation pattern of the grounded metal column is omni-directional, and the metal column is loaded so that the half powerbeam width of the microstrip antenna can be increased. A square ring generates a horizontal polarization electric field which is used for balancing an additional vertical polarization electric fieldof the metal column, the beam width is increased, and meanwhile the axial ratio property of the antenna is improved. By introducing the stacked-up structure of parasitic patches, the impedance bandwidth of the antenna is increased, the parasitic patches are subjected to circular arc chamfering, and the axial ratio bandwidth and 3dB axial ratio beam width of the antenna are further improved.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a C-band miniaturized wide-bandwidth beam circularly polarized microstrip antenna. Background technique [0002] In recent years, with the rapid development of communication technology, miniaturized circularly polarized microstrip antennas with wide bandwidth beams have been favored by many researchers. This is because the microstrip antenna has a series of outstanding advantages such as small size, light weight and low cost. Circular polarization has strong anti-rain, fog, anti-multipath and other interference capabilities, and can meet the strict requirements of antennas in various radio fields such as radar, remote sensing, satellite communication, radio frequency identification, and electronic countermeasures. A wide frequency band can provide abundant spectrum resources for the communication system, and a wide beam can cover a wide spatial range, which greatly improves the...

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Problems solved by technology

[0004] The present invention aims at the existing circularly polarized microstrip antenna with narrow operating frequency band, half-power beam width and 3dB beam width are not wide enough, and it is difficult to meet the requirements of base station communication broadband and wide beam, and provides a miniaturized wide bandwidth of C-band Beam Circularly Polarized Microstrip Antenna

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