Dual-probe reverse phase feeding microstrip antenna

Abstract

The invention discloses a dual-probe reverse phase feeding microstrip antenna, which comprises a first medium substrate, a second medium substrate and a ground level, wherein the first medium substrate is parallel to the ground level; the second medium substrate penetrates through the ground level vertically; the upper end of the second medium substrate is adjacent to the lower surface of the first medium substrate; the first medium substrate is provided with a microstrip patch; a first L-shaped probe strip and a second L-shaped probe strip are arranged symmetrically on the second medium substrate; the first L-shaped probe strip is formed by connecting a first coupling exciting strip which is parallel to the ground level and a first feeding strip which is vertical to the ground level; the second medium substrate is partitioned into an upper area and a lower area by an intersection line between the second medium substrate and the ground level; an area of the second medium substrate, which is positioned on the lower side of the intersection line, is provided with a microstrip power divider in two penny; one path of the microstrip power divider is connected with the first feeding strip through an inverter; and the other path of the microstrip power divider is directly connected with the second feeding strip.

Description

technical field [0001] The invention belongs to the technical field of microwave antennas, and relates to a microstrip antenna capable of obtaining excellent performance in polarization and pattern characteristics. Background technique [0002] There are many feeding methods for microstrip antennas, which are used to improve and enhance the performance of microstrip antennas. Most common microstrip antennas use microstrip line direct feeding, probe feeding, aperture coupling feeding and other methods. Probe feeding is one of the methods to obtain a wider operating bandwidth, so it has received extensive attention, and there are many technical researches on probe feeding. Tuning to obtain greater bandwidth, such as drop-shaped probes and L-shaped probes, have achieved obvious results in broadening the working bandwidth of microstrip antennas. However, due to the asymmetry of the probe feeding, the polarization purity of the antenna is low, the cross-polarization characterist...

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Problems solved by technology

[0003]Technical problem: The present invention provides a method that can solve the influence of asymmetrical feeding structure on the performance of probe-fed microstrip antenna, and has the advantage of broadening the working bandwidth , and can overcome the low polarization purity of the general L-probe fed antenna and the deviation of the main lobe of the radiation pattern. The microstrip antenna with dual-probe anti-phase feed

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