Ultra wide band bandpass filter with notch property

Abstract

The invention provides an ultra wide band bandpass filter with a notch property. The ultra wide band bandpass filter comprises a T-shaped stub-loaded resonator, a first open ring resonator, a second open ring resonator, an input feeder line and an output feeder line. The input feeder line and the output feeder line are connected at left and right sides of the T-shaped stub-loaded resonator and are in gap coupling with the T-shaped stub-loaded resonator. The first open ring resonator and the second open ring resonator are symmetrically arranged at the left and right sides of the T-shaped stub-loaded resonator and are in gap coupling with the left and right sides of the T-shaped stub-loaded resonator. Through adoption of the T-shaped stub-loaded resonator, the bandwidth of a passband can be controlled well, a zero point is respectively generated at two sides of the passband, and the selectivity of the passband is improved. Through adoption of the open ring resonators, a notch stopband is generated, a location of center frequency of the stopband can be adjusted conveniently, the zero point is respectively generated at two sides of the stopband, and the selectivity of the stopband is improved.

Description

technical field [0001] The invention relates to the technical field of microwave communication, and more specifically relates to an ultra-wideband band-pass filter with notch characteristics. Background technique [0002] With the rapid development of the global communication industry, multiple communication standards exist at the same time, which makes the frequency resources more and more tense. In practical applications, some unnecessary frequency bands often appear in the required frequency bands. Therefore, in actual communication systems In the desired frequency band, these unwanted frequency bands need to be suppressed. [0003] Especially for modern radio astronomy observations, radio frequency interference suppression technology has become an unprecedented technical challenge. One of the current methods to suppress unwanted frequency bands is to integrate a notch filter into a bandpass filter, however, this method is complex in design, complex in structure, large i...

AI Technical Summary

Problems solved by technology

One of the current methods to suppress unwanted frequency bands is to integrate a notch filter into a bandpass filter, however, this method is complex in design, complex in structure, large in size, and not easy to integrate. In addition, few researches currently will Combining high-temperature superconducting technology with radio-frequency interference suppression technology to design ultra-wideband high-temperature superconducting filters with notch characteristics

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