Broadband waveguide magic-T power splitter

Abstract

The invention discloses a broadband waveguide magic-T power splitter, and relates to the technical field of microwave communication. The broadband waveguide magic-T power splitter comprises a T-shaped structure, an E-arm waveguide, a matching cylinder and four square connecting flanges, wherein both the upper inner surface and the lower inner surface of an arm H of the T-shaped structure are provided with a stepped structure in which multiple steps transiting from interior to exterior, the T-shaped structure is composed of a T-shaped structure upper block and a T-shaped structure lower block, the T-shaped structure upper block and the T-shaped structure lower block are the same in external contour, edges of the external contours of the T-shaped structure upper block and the T-shaped structure lower block are aligned and connected to form the T-shaped structure; and the lower inner surface, which directly faces to the arm H, of the T-shaped structure is provided with the matching cylinder at a junction of the arm H of the T-shaped structure and two branch waveguides. The broadband waveguide magic-T power splitter is simple in structure, convenient to process and high in reliability, port standing waves are less than 1.15 in the broadband with the relative bandwidth being 30%, the isolation degree is greater than 40dB, and the phase balance and the amplitude balance of a port of the power splitter are very well, thereby being suitable for acting as a power distribution or combination device for a broadband antenna in use.

Description

technical field [0001] The invention relates to a power divider in the technical field of microwave communication, in particular to a broadband waveguide magic T power divider. Background technique [0002] A power divider, referred to as a power divider, is an important component commonly used in microwave communication systems, and is used to realize the power distribution of one signal or the power combination of two signals. The electrical performance of the power splitter, such as operating bandwidth, port standing wave, isolation, phase and amplitude balance, etc., is of great significance to the entire microwave communication system. At present, the commonly used power dividers have two structural forms, microstrip and waveguide. In the occasions that emphasize low loss and high power, the waveguide structure is mostly used. As a specific type of waveguide structure power divider, the waveguide magic T power divider is mostly used in engineering to realize the synthe...

AI Technical Summary

Problems solved by technology

Most of the traditional waveguide magic T power splitters use standard waveguides as transmission lines, and use conical frustum or stepped conical frustum as matching structure, which is not only complicated to process, but also requires high assembly accuracy, and can only guarantee standing waves within about 10% of the working bandwidth. , isolation and other key indicators of high performance, once the working bandwidth exceeds 15%, the relevant electrical performance indicators will deteriorate rapidly, and it is difficult to adapt to the increasing requirements of microwave communication systems for broadband

[0003] The Chinese patent number is 201210067877.3, named "A Magic T Power Splitter", and the Chinese Patent No. 201210201079.5, named "A Magic T Power Splitter Based on a New Matching Structure". The two patents respectively announced two Although there are differences in the structure of the waveguide magic T power splitter, they are essentially an improvement on the traditional waveguide magic T power splitter, without changing the "standard waveguide as the transmission line and the stepped cone as the matching structure". A design idea, so the working bandwidth must be limited to about 10%

The Chinese patent number is CN201220268592.1, titled "A New Type of Magic T Power Distribution / Synthesizer", which announced a new type of broadband magic T. The port is a non-standard waveguide, and it is only used as an absorption port, and the electrical performance is poor

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