Deformation oscillator circular polarization antenna

Abstract

The invention discloses a deformation oscillator circular polarization antenna, and relates to the technical field of communication and measurement and control. The deformation oscillator circular polarization antenna comprises a deformation oscillator, a reflective aluminum plate, a printed plate and a cavity layer; a rectangular gap is formed in the center of the reflective aluminum plate; a metal stratum is arranged on the upper surface of the printed plate, a radiation gap is formed in the area, corresponding to the rectangular gap, on the metal stratum, a strip line is arranged on the lower surface of the printed plate and located in a transverse mid-perpendicular face of the radiation gap, the strip line is divided into a long part and a short part by a longitudinal mid-perpendicularface of the radiation gap, the outer end of the long part of the strip line is used for feeding in a radio-frequency signal, and an open-circuit line is arranged at the outer end of the short part ofthe strip line; and the cavity layer comprises a rectangular reflective cavity and a shielding groove, and the shielding structure of the strip line is constituted by the shielding groove. The deformation oscillator circular polarization antenna has the characteristics of wide standing wave bandwidth and wide axial ratio bandwidth, and is suitable for high performance, low contour and high gain circular polarization antenna of an aircraft carrier in a communication and measurement and control system.

Description

technical field [0001] The invention relates to the technical fields of communication and measurement and control, in particular to a deformable vibrator circularly polarized antenna. Background technique [0002] At present, circularly polarized antennas are widely used in communication and measurement and control systems, and circularly polarized antenna technology has become a very important direction in the field of antenna research. [0003] The circularly polarized antennas in the prior art mainly have the following structural forms. Although these structural forms have their own characteristics in performance, they all have some shortcomings: [0004] 1. Corner-cutting circularly polarized microstrip antenna. This type of antenna has a simple structure and low profile, but the axial ratio and standing wave bandwidth of the antenna are less than 2%. [0005] 2. The circularly polarized microstrip antenna form with an external circularly polarized bridge. The axial rat...

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Problems solved by technology

[0005] 2. The circularly polarized microstrip antenna form with an external circularly polarized bridge. The axial ratio and standing wave bandwidth of this form of microstrip antenna are generally wider than 3dB. The axial ratio bandwidth is greater than 15%, and the standing wave bandwidth of less than 2 is greater than 20. %, but the external circular polarization bridge takes up a lot of space, the feeder is long, and the difference loss is large, which is not conducive to the integrated design of antenna and network

[0006] 3. The waveguide structure circularly polarized antenna has high radiation efficiency and a bandwidth greater than 20% with an axial ratio of less than 3dB, but the feed network takes up a lot of space and has a bulky structure, which is not conducive to the low profile design of the antenna, and is not conducive to the frequency In addition, the processing method of this circularly polarized antenna usually adopts the welding method, and the processing cost is relatively high

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