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Waveguide Low Pass Filter with Zero

A low-pass filter and waveguide technology, which is applied in the field of electronic communication, can solve the problems of poor suppression and achieve the effect of increasing the suppression

Active Publication Date: 2022-03-01
PIVOTONE COMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The common waveguide low-pass filter adopts the form of ridge waveguide. The structure of this type of waveguide low-pass filter is relatively simple, and it adopts Chebyshev and other ripple responses. scattered, there is no good suppression

Method used

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  • Waveguide Low Pass Filter with Zero
  • Waveguide Low Pass Filter with Zero
  • Waveguide Low Pass Filter with Zero

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Embodiment Construction

[0018] The technical solution of the present disclosure will be described in detail below in conjunction with the accompanying drawings. In the description of the present application, it should be understood that the terms "first" and "second" are only used for descriptive purposes, and cannot be interpreted as indicating or implying relative importance or implicitly indicating the number of indicated technical features, Used only to distinguish different components.

[0019] In addition, the orientation or positional relationship indicated by the terms "middle", "between", "top", "upward", "left to right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description The present application and simplified descriptions do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limi...

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Abstract

The invention discloses a waveguide low-pass filter with a zero point, which relates to the technical field of electronic communication and solves the technical problem that the existing waveguide low-pass filter cannot suppress the near-end stray well. A rectangular recess is added to the end of the waveguide or the output waveguide, and the rectangular recess can generate a transverse resonance, so that the transmission zero point can be realized. The existence of the transmission zero makes it possible to greatly increase the filter's suppression of near-end spurs without increasing the order of the filter. The rectangular notches work together with either the input waveguide or the output waveguide to realize two resonances within the transmission passband of the filter, realizing the transmission poles. The resonant column of the middle resonant cavity is a metal column protruding upwards. The gap between the top of the metal resonant column and the cover plate is very small, which is equivalent to loading a large capacitance on the top of the middle resonant cavity, making the second of the middle resonant cavity The spurious resonance will be far away from the passband frequency of the filter to achieve the suppression of the far-end harmonics.

Description

technical field [0001] The present disclosure relates to the technical field of electronic communication, in particular to a waveguide low-pass filter with zero point. Background technique [0002] In electronic communication equipment in the microwave frequency band, it is often necessary to use waveguide filters to filter out harmonics and spurs, because these harmonics and spurs will interfere with the normal operation of electronic equipment after being amplified by the amplifier. In addition, modern radar and communication equipment increase the output peak power and average power in order to pursue a longer operating distance, but high-power transmitters will inevitably bring too high harmonic power. The harmonics and spurs of these high-power transmitters The energy can seriously interfere with or even burn electronic equipment. In addition, electronic equipment with unqualified output harmonics and strays cannot obtain a factory license from the Radio Regulatory Com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/212H01P1/208
CPCH01P1/212H01P1/208
Inventor 江顺喜殷实梁国春项显宋昕宇
Owner PIVOTONE COMM TECH