Rectangular single-ridge waveguide structure low pass filter

Abstract

The invention discloses a rectangular single-ridge waveguide structure low pass filter. The rectangular single-ridge waveguide structure low pass filter comprises a ridge waveguide tube, a step type impedance transform block and a ridge waveguide resonance column type structure, wherein the low pass filter is provided with input and output ends of a standard waveguide tube (a,b), the ridge waveguide resonance column type structure is a ridge waveguide tube (a1,b1), the step type impedance transform block is arranged between the standard waveguide tube (a,b) and the ridge waveguide tube (a1,b1), and dimensions of the ridge waveguide tube and the standard waveguide tube satisfy formulas of a1<a, and b1<b. By utilizing the single-ridge waveguide structure, complexity of the waveguide low pass structure is reduced, design is more simple, and the structure dimension realizes miniaturization; through the single ridge waveguide column, processing difficulty and processing cost are reduced, problems of difficult processing, poor performance and no-easy batch production existing in a traditional waveguide low pass filter in the prior art can be solved, debugging-free production can be realized, and the rectangular single-ridge waveguide structure low pass filter further has advantages of high precision and high inhibition performance.

Description

technical field [0001] The invention belongs to the field of wireless communication components, and in particular relates to a novel low-pass filter with a rectangular single-ridge waveguide structure that is easy to process. Background technique [0002] At present, waveguide filters have been widely used in existing satellite communication systems and point-to-point communications. The mode of the rectangular waveguide bandpass filter itself leads to poor rejection of the far-end signal, and the interference of the far-end signal to other equipment seriously affects the use of other frequency bands. A device that must be installed in the device. The design of a low-pass filter that is simple, easy to process and high performance has become a key point of concern in the industry. [0003] The structural design methods of the rectangular waveguide low-pass filter mainly include: 1. Step impedance low-pass filter (high and low impedance form capacitance and inductance). 2....

AI Technical Summary

Problems solved by technology

These two structures have certain defects in processing, and the performance of step impedance low-pass filter far-end suppression is not enough, while double-ridge waveguide low-pass filter and step impedance low-pass filter are in processing Both sides of the cavity and cover plate need to be processed and the structure is more complicated

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