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Broadband rectangular waveguide magic T

A rectangular waveguide and rectangular wave technology, applied in the microwave field, can solve the problems of large volume, high processing and assembly requirements, and narrow working bandwidth of the rectangular waveguide magic T, and achieve the effect of simple matching structure and good impedance matching.

Inactive Publication Date: 2020-02-11
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The conventional rectangular waveguide magic T has a narrow working bandwidth. To expand the bandwidth, a relatively complex impedance matching structure is often introduced, which is large in size and requires high processing and assembly requirements.

Method used

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  • Broadband rectangular waveguide magic T

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Such as figure 1 As shown, a broadband rectangular waveguide magic T, including: E-arm waveguide, E-arm matching waveguide, H-arm waveguide, first H-arm matching waveguide, second H-arm matching waveguide, two-way branch waveguide, two-way branch matching waveguide , T-shaped coupling cavity and stepped matching cylinder.

[0027] The T-shaped coupling cavity includes four ports, namely an E-plane port, an H-plane port and two branch ports. The E-plane port is connected to one port of the E-arm matching waveguide, the E-arm waveguide is connected to the other port of the E-arm matching waveguide, and the signal is fed from the E-arm waveguide. The H-plane port is connected to the first H-arm matching waveguide, the second H-arm matching waveguide, and the H-arm waveguide in sequence; the H-plane port is an isolation port, and the isolation characteristic is realized by an external load or filled with a wave-absorbing material; two-way branch The ports have the same st...

Embodiment 2

[0041] This embodiment is basically the same as Embodiment 1. Preferably, the stepped matching cylinder has a three-stage structure, and the diameter of the cylinder decreases sequentially from the bottom to the top. The three-stage stepped cylinder design effectively increases the impedance matching bandwidth of the matching cylinder, improves port isolation and port standing wave characteristics.

Embodiment 3

[0043] This embodiment is basically consistent with Embodiment 1 / 2. Preferably, the edge of the first H-arm matching waveguide is chamfered, and it is processed into a 90° corner structure, so that the direction of the H-arm waveguide is changed to be the same as that of the first H-arm waveguide. The E-arm waveguides are parallel to reduce volume.

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Abstract

The invention relates to the technical field of microwaves, and discloses a broadband rectangular waveguide magic T, which comprises an E-arm waveguide, an E-arm matching waveguide, an H-arm waveguide, a first H-arm matching waveguide, a second H-arm matching waveguide, two branch waveguides, two branch matching waveguides, a T-shaped coupling cavity and a step matching cylinder. The T-shaped coupling cavity comprises four ports, namely an E-plane port, an H-plane port and two branch ports; the E-plane port is connected with the E-arm matching waveguide and the E-arm waveguide in sequence to realize signal input; the H-plane port is connected with the first H-arm matching waveguide, the second H-arm matching waveguide and the H-arm waveguide in sequence to realize output of an isolation signal; and the two branch ports are connected with the two branch matching waveguides and the two branch waveguides in sequence to realize output of power division signals. The broadband rectangular waveguide magic T matching structure is simple, impedance matching of each port is good, and the relative bandwidth reaches more than 40%.

Description

technical field [0001] The invention relates to the field of microwave technology, in particular to a broadband rectangular waveguide magic T. Background technique [0002] The magic T is a functional unit widely used in microwave and millimeter wave systems. Its function is to distribute the signal of one input port to two output ports in equal proportions, and at the same time provide good isolation performance between the output ports after the isolation port is connected to the load. The usual composition includes E arm, H arm, branch waveguide and matching structure. As a symmetrical four-port microwave functional unit, the magic T has good matching characteristics of each port and high isolation, and is widely used in power combining, antenna feeder systems, beamforming and other networks. [0003] The conventional rectangular waveguide magic T has a narrow working bandwidth. To expand the bandwidth, a relatively complex impedance matching structure is often introduce...

Claims

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Application Information

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IPC IPC(8): H01P5/20
CPCH01P5/20
Inventor 张人天胡春江彭安尽来晋明
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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