An E-band Orthogonal Mode Coupler

Abstract

The invention discloses an E-band orthogonal mode coupler, comprising a square waveguide, a mode separation structure, a Y-shaped combining waveguide and a vertical matching waveguide; the square waveguide is a metal waveguide with a square cross section, and the square waveguide passes through a mode The separation structure communicates with the Y-shaped combining waveguide and the vertical matching waveguide respectively, and the mode separation structure includes an upper step and a lower step located above and below the square waveguide, and both the upper step and the lower step include the first level connected with the square waveguide Bosses and second-stage bosses, the first-stage bosses and second-stage bosses are connected end to end, the first-stage bosses extend to both sides through the waveguide of the two side arms, and communicate with the Y-shaped combining waveguide. The second stage boss communicates with the vertical matching waveguide through the straight-through waveguide. The invention aims at the polarization multiplexing technology of E-band wireless communication, has high isolation, is suitable for millimeter-level communication systems, and has a simple structure and is easy to implement.

Description

technical field [0001] The invention relates to the field of couplers, in particular to an E-band orthogonal mode coupler. Background technique [0002] With the continuous development of communication technology, low-frequency spectrum resources are becoming increasingly scarce, and communication frequencies are developing from microwave to millimeter wave. The E-band millimeter wave (71-76 / 81-86GHz) can provide an available bandwidth of 10GHz, which is currently the highest commercial frequency band. The E-band can provide ultra-high-speed wireless communication rate services, and has begun to be gradually used in application scenarios such as base station wireless backhaul and emergency communication. [0003] In order to improve the spectral efficiency of the E-band communication system, polarization multiplexing is an effective same-frequency multiplexing technology. Polarization multiplexing technology refers to the transmission of signals through a pair of orthogona...

AI Technical Summary

Problems solved by technology

[0006] Among them: the tapered OMT is an asymmetric structure, which is prone to high-order modes, so the isolation performance is poor and the working bandwidth is low

[0007] The turnstile type OMT requires two Y-shaped waveguides perpendicular to each other, so it is usually divided into multiple pieces during processing, which requires high assembly accuracy, complex process and high cost

[0008] The disadvantage of Boifot-type OMT is that the processing is complex, and there are positioning errors in the structure of the metal pillar and the metal diaphragm, so the overall processing accuracy is relatively high.

[0009] The disadvantage of the double ridge OMT is that the double ridge is narrow (about one tenth of the waveguide width) and located on the central axis of the common waveguide

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