A waveguide plate array antenna with inclined surface matching step

Abstract

The invention relates to a waveguide plate array antenna with inclined matching steps, comprising a radiation layer, a coupling layer and a feeding network layer. The radiation layer is arranged abovethe coupling layer, and the feeding network layer is arranged below the coupling layer. The feeding network layer is provided with a waveguide power divider, a first matching step and a feeding port.The first matching step is a tangential pentagon, and each of the first matching steps corresponds to a coupling cavity in the coupling layer for canceling the reactance introduced when the feeding network layer is converted to the coupling cavity, while guiding the conduction direction of the electromagnetic wave. The first matching step of the tangential pentagon corresponding to the coupling cavity of the waveguide slab array antenna with the inclined matching step can realize the matching between the feeding network and the coupling cavity in a wide band range, and the machining accuracyis low, which is favorable for the machining realization.

Description

technical field [0001] The invention belongs to the technical fields of satellite communication and microwave communication, and in particular relates to a waveguide plate array antenna with slope matching steps. Background technique [0002] The waveguide plate array antenna has the characteristics of high mechanical strength, compact structure, and easy compatibility with the carrier. These characteristics make the antenna adaptable to air resistance or water resistance. It is widely used in reconnaissance, early warning and countermeasure radars, airborne and missiles Antenna, vehicle satellite receiving antenna, satellite communication and microwave communication system and other fields. With the increase of the communication channel capacity, the communication system increasingly needs the waveguide panel array antenna to work in a higher frequency band and have a wider operating bandwidth. The impedance matching and adjustment structure in the existing waveguide panel ...

AI Technical Summary

Problems solved by technology

figure 1 It is a top view of the first matching step of the waveguide planar array antenna in the prior art. The shape of the matching step is L block. Since the inner right angle of the L block is usually made by cutting with a circular milling cutter, the L block has an inner inversion. The corner is arc-shaped, and the maximum current intensity is at the two tips of the L notch. This structure is not easy to achieve the matching between the feed network and the coupling cavity in the broadband range.

In addition, when the number of array elements remains unchanged, the increase in frequency will reduce the volume of the antenna, and the processing accuracy needs to be improved to ensure the consistency between the model design and the actual processing test. The requirements for machining accuracy are high, and a slight deviation will greatly affect the standing wave bandwidth of the antenna, causing difficulties in machining

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