Coupled Slot Orthogonal Mode Coupler

Abstract

A coupling slot orthogonal mode coupler disclosed by the present invention aims to provide an orthogonal mode coupler with simple structure, reduced longitudinal dimension and high isolation. The present invention is realized through the following technical solutions: a coupling gap (31) is formed between the bottom of the square waveguide cavity (1) and the bottom coupling structure (3), and a single-mode transmission waveguide (32) is formed on the outer wall of the bottom coupling structure, The vertical plane electromagnetic wave mode (42) in the orthogonal polarization mode is coupled and transmitted between the square waveguide cavity and the single-mode transmission waveguide through the coupling slot; the side arm of the side wall coupling structure (2) combines the coupling slot (21) parallel to the square waveguide cavity The sidewall of the waveguide cavity, the horizontal plane of the flat waveguide (22) is perpendicular to the upper end of the sidewall coupling structure through the inversion (23), and the horizontal plane electromagnetic wave mode (41) in the orthogonal polarization mode is realized in the square waveguide through the coupling slot (21). Coupling transmission between cavity and flat waveguide. The invention is suitable for the feeding structure of the extremely low-profile dual-polarization waveguide array antenna.

Description

technical field [0001] The present invention relates to a quadrature-mode converter widely used in satellite communications, radar systems and radio astronomy. A novel orthogonal-mode coupler based on slot coupling is especially suitable for dual-polarized waveguide array antennas as a feed structure for dual-polarized radiating antenna elements. Background technique [0002] Orthogonal mode coupler, also known as orthogonal mode converter, is a microwave component used to separate or mix two mutually orthogonal polarized waves. A quadrature mode coupler separates two quadrature main modes on a common port, separates them, and feeds a single port. After the orthogonal mode is divided into horizontal and vertical two basic modes, each accounts for half of the total energy. The main function of the orthogonal mode coupler is to synthesize or separate two orthogonal modes. It is widely used in satellite communication, radar system and radio astronomy as an important component...

AI Technical Summary

Problems solved by technology

Due to the limited installation space of some electronic systems, the volume and weight of the antenna are the decisive indicators. The thickness of the dual-polarized waveguide array antenna based on the traditional orthogonal mode coupler is relatively thick, which is not suitable for this type of system.

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