High-gain slot staggered continuous scanning substrate integrated waveguide leaky-wave antenna

Abstract

The invention discloses a high-gain slot staggered continuous scanning substrate integrated waveguide leaky-wave antenna. The antenna comprises a feed structure, a dielectric plate, a top metal layer, a metal grounding plate, a metalized via hole and a radiator structure. The upper layer and the lower layer of the dielectric plate are tightly combined with the top metal layer of the etching gap and the metal grounding plate respectively. The radiator structure comprises A-shaped gaps and transverse gaps which are etched on the surface of the top metal layer, the two A-shaped gaps and the transverse gaps are arranged in a double-row stacking and staggered mode in one period, and the feed structure is composed of a metal probe and an outer conductor. Impedance matching is realized by adjusting the distance and the size of the A-shaped gap and the transverse gap. Compared with a simple longitudinal slot, the A-shaped slot can disturb more surface current, radiate more energy and realize larger gain. Through the combination of the upper gap and the lower gap, impedance matching under multiple periods is realized, so that a main wave beam can continuously scan from a forward space to a backward space.

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