Ultra-wide-band dielectric-loaded four-ridge horn feed source

Abstract

The invention relates to an ultra-wide-band dielectric-loaded four-ridge horn feed source. The feed source is a dielectric-loaded wide-band dual-polarized circular-opening four-ridge horn, with a working frequency band of 0.6-4GHz, and applied to a radio telescope ultra-wide-band receiver system. The feed source consists of a four-ridge horn, a four-ridge circular waveguide, ridge film sheets, a dielectric rod, a metal outer edge, a first coaxial probe, a second coaxial probe and a dielectric ring. By adding the ridge film sheets to the circular waveguide, the working bandwidth of the four-ridge circular waveguide is far higher than that of the circular waveguide; then the four-ridge waveguide is made into the four-ridge horn so as to realize the ultra-wide-band and dual-polarized functions and the like; by loading the dielectric rod, the high-frequency gain can be lowered, and by loading the metal outer edge, the low-frequency gain can be improved, so that gain consistency in the working frequency band can be realized; by loading the dielectric ring and changing the cross section of the ridges, the equalization radiation property of a directional diagram can be adjusted; the feed source directional diagram is relatively high in equalization; and an actually measured result is basically identical to a simulation result, so that radio astro observation requirement can be satisfied.

Description

technical field [0001] The invention relates to an ultra-wideband medium-loaded four-ridge horn feed source, which is specially used for ultra-wideband microwave receivers in the field of radio astronomy. Background technique [0002] A radio telescope is an important tool for radio astronomy observations. Its main function is to gather the electromagnetic waves radiated by cosmic celestial bodies on the main focus or the secondary focus, and then be received and transmitted by the feed and receiver systems at the focus. log terminal. [0003] With the promotion of radio astronomy observation requirements, the requirements for the feed system tend to be multi-band, full-band and ultra-wideband, and cover millimeter-wave and sub-millimeter waves. The development of broadband / ultra-wideband feeds for radio astronomy is very important. Significance. For feedforward antennas with a working frequency band of 0.6-4GHz, the feed source not only requires good electrical performanc...

AI Technical Summary

Problems solved by technology

However, the feeding method of the Eleven feed is not easy to implement and the return loss and insertion loss are relatively large, while the four-ridge speaker uses coaxial feeding, the feeding method is easy to implement and the insertion loss is small

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