Small circular polarizer

Abstract

The invention discloses a small circular polarizer. The small circular polarizer comprises flanges, a square waveguide cavity and large-diameter pin sets, wherein the flanges are installed at the twoends of the square waveguide cavity, the pin sets are arranged on edges of the square waveguide cavity, gradient corner cuts are arranged at the edges, where the pin sets are located, of the square waveguide cavity, and the gradient corner cuts are located at near ports of the square waveguide cavity; isobathic corner cuts are arranged at the edges, where the pin sets are located, of the square waveguide cavity; isobathic corner cuts are arranged at edges, where the pin sets are not located, of the square waveguide cavity; and each pin set comprises at least one group of pins, wherein each group of pins comprises an even number of pins with the same length, and distances between the adjacent pins in each pin set are not equal. The square waveguide cavity is formed by machining an aluminumblock, and the gradient corner cuts and the isobathic corner cuts are machined by the adoption of an electrosparking method. The insertion depth, in the edges of the square waveguide cavity, of the pins in the pin sets is successively decreased from the middle to the two ends. Through the proposed technical scheme, the technical effects of reducing circular polarizer size and lowering machining limitation are achieved.

Description

technical field [0001] The present invention relates to a miniaturized circular polarizer, more specifically, relates to a miniaturized circular polarizer with Ku frequency band, wide frequency band, large diameter, pin loading with unequal spacing. Background technique [0002] The waveguide circular polarizer is a key component of the circularly polarized reflector antenna feed system, and its main function is to transform linearly polarized signals into circularly polarized signals. The structural form of the waveguide circular polarizer directly determines the volume, weight and electrical performance of the feed horn. Common forms of circular polarizers include square waveguide or circular waveguide inserting diaphragms, ridges, pins or dielectric plates and other phase-shifting element structures, as well as grooves on the symmetrical wall of the circular waveguide, cutting corners of the square waveguide, and circular polarizers. The waveguide transitions directly to...

AI Technical Summary

Problems solved by technology

This will result in a longer circular polarizer length and higher requirements for machining accuracy

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