Coupling seam orthogonal mode coupler

Abstract

The invention discloses a coupling seam orthogonal mode coupler which has the advantages of simple structure, reduced longitudinal dimension and high isolation degree. According to the technical scheme provided by the invention, a coupling gap (31) is arranged between the bottom of a square waveguide cavity (1) and a bottom coupling structure (3); a single mode transmission waveguide (32) is arranged on the outer side wall of the bottom coupling structure; a vertical plane electromagnetic wave mode (42) in an orthogonal polarization mode carries out coupling transmission between the square waveguide cavity and the single mode transmission waveguide through the coupling gap; the side arm combination coupling gap (21) of a side wall coupling structure (2) is parallel to the side wall of the square waveguide cavity (1); the horizontal plane of a flat waveguide (22) is perpendicular to the upper end of the side wall coupling structure through an inverted crutch (23); and a horizontal plane electromagnetic wave mode (41) in the orthogonal polarization mode realizes coupling transmission between the square waveguide cavity and the flat waveguide through the coupling gap (21). The coupling seam orthogonal mode coupler provided by the invention is applicable to the feed structure of an extremely low profile dual polarized waveguide array antenna.

Description

technical field [0001] The present invention relates to an orthogonal mode converter widely used in satellite communications, radar systems and radio astronomy. The new orthogonal-mode coupler based on slot coupling is especially suitable for dual-polarized waveguide array antennas as the feeding structure of dual-polarized radiating antenna units. Background technique [0002] Orthogonal mode couplers, also known as quadrature mode converters, are microwave components used to separate or mix two mutually orthogonal polarized waves. The quadrature mode coupler separates the two quadrature main modes on the common port, so that they are separated and supplied to a single port. The orthogonal modes are divided into horizontal and vertical fundamental modes, each of which 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 communications, radar systems and rad...

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.

Images