Interdigital slot unit loaded with capacitance variable diodes and reconfigurable reflection array antenna

Abstract

The present invention provides an interdigital slot unit loaded with capacitance variable diodes and a reconfigurable reflection array antenna. The interdigital slot unit comprises a metal patch layer, a dielectric layer and a metal grounding layer which are sequentially stacked from top to bottom; a transverse slot, a first longitudinal slot, a third longitudinal slot and a second longitudinal slot are formed in the metal patch layer; the first longitudinal slot and the third longitudinal slot have the same length and are symmetrically distributed at two sides of the second longitudinal slot, and the second longitudinal slot has the other length; the first longitudinal slot, the second longitudinal slot and the third longitudinal slot are parallel to one another; the first transverse slot vertically passes through the center of the first longitudinal slot, the center of the second longitudinal slot and the center of the third longitudinal slot; two ends of the transverse slot are respectively loaded with two capacitance variable diodes; and the length setting of the three longitudinal slots satisfies a condition that the resonance frequency of the first longitudinal slot and the third longitudinal slot is 1.2 times to 1.5 times of the resonance frequency of the second longitudinal slot. The aperture efficiency of the reconfigurable reflection array antenna designed on the basis of the interdigital slot unit can reach 74%.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a finger-shaped slot unit loaded with varactor diodes and a reconfigurable reflective array antenna. Background technique [0002] Phased array antennas are widely used in radio systems such as point-to-point communication, new system radar and precision navigation, and their beam pointing can be flexibly and freely controlled. However, due to the existence of mutual coupling between adjacent elements of the phased array antenna, blind spots and grating lobe effects appear in the scanning area, which deteriorates the performance of the antenna; and each element of the phased array antenna needs to be equipped with an electronic phase shifter and Microwave T / R components, for medium and large-scale phased arrays, the feed network is very complex, and the power consumption is high, the loss is large, the processing cost is high, and the structure is heavy, which limits its applica...

AI Technical Summary

Problems solved by technology

[0004] At present, the existing reconfigurable reflectarrays often adopt a patch structure, but the ordinary patch unit has a narrow working bandwidth and a small phase shift range, which limits the application range of the reconfigurable reflectarray antenna.

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