Circularly-polarized two-dimensional wide-angle phase-scanning antenna unit and phased-array antenna array

Abstract

The invention provides a circularly-polarized two-dimensional wide-angle phase-scanning antenna unit, which comprises a waveguide air cavity, the waveguide air cavity comprises four enclosed metal cavity walls and a metal bottom plate, each metal cavity wall is provided with a metal diaphragm, the position of each metal diaphragm deviates from the midpoint position of the corresponding metal cavity wall, the four metal diaphragms are centrosymmetric in position, and the metal diaphragms on the two opposite metal cavity walls are consistent in specification; the metal bottom plate is provided with an excitation gap, the excitation gap is provided with a first gap and two second gaps which are vertically communicated with the two ends of the first gap respectively, and the two second gaps are consistent in length and opposite in direction. The invention also provides a phased-array antenna obtained by the circularly polarized antenna unit array. The antenna unit and antenna array have the advantages that the circular polarization performance is achieved through the two pairs of perturbation metal diaphragms, due to the edge capacitance effect of the metal diaphragms, the two-dimensional size of the antenna unit can be compressed to the maximum degree, and the interval condition of two-dimensional wide-angle scanning is met.

Description

technical field [0001] The invention relates to the technical field of circularly polarized antennas, in particular to a circularly polarized two-dimensional wide-angle phase-scanned antenna unit and a phased array antenna array. Background technique [0002] The circularly polarized antenna can reduce the delay spread caused by the multipath effect, reduce the intersymbol crosstalk, reduce the Faraday rotation effect caused by the ionosphere and the polarization loss caused by polarization mismatch, and the relative position between the transmitting and receiving antennas can be more flexible , are widely used in space telemetry applications of satellites, space probes and ballistic missiles. Metal waveguides have the advantages of small conductor loss and dielectric loss, large power capacity, simple structure, high mechanical strength, and easy processing. Therefore, high-performance circularly polarized antennas designed using metal waveguides are currently a hot spot in...

AI Technical Summary

Problems solved by technology

Loading the polarized waveguide is easy to control the feed amplitude of the unit, and has high efficiency and simple design. However, due to the large size of the polarized waveguide, the unit spacing is large when the array is arranged, and wide-angle scanning cannot be realized.

Images