Broadband single-ended microstrip short-line band-pass filter

Abstract

The invention discloses a broadband single-ended microstrip short-line band-pass filter, which comprises a first feeder line, a second feeder line, a 1 / 8 wavelength coupling microstrip line, first tofourth chip capacitors, a first metallized through hole and a second metallized through hole. One end of the 1 / 8 wavelength coupling microstrip line is connected with the first feeder line, the second feeder line, the first chip capacitor, the third chip capacitor and the fourth chip capacitor, and the other end of the one-eighth wavelength coupling microstrip line is grounded through the first metallized through hole. The first chip capacitor is loaded on the inner side of one end of the coupling microstrip line in series, the third chip capacitor and the fourth chip capacitor are loaded onthe outer side of one end of the coupling microstrip line in parallel, and the other end of the third chip capacitor and the other end of the fourth chip capacitor are grounded through the second metallized through hole. And the second chip capacitor is loaded on the inner side of the middle part of the coupling microstrip line in series. Compared with an existing broadband single-ended microstripband-pass filter, the broadband filter response is obtained, meanwhile, the circuit size is greatly reduced, the loss is extremely low, and the structure is simple.

Description

technical field [0001] The invention relates to the field of microwave communication, in particular to a broadband single-ended microstrip stub bandpass filter. Background technique [0002] With the development of wireless communication technology, wireless systems need to be compatible with multiple standards and functions, which promotes the development of microwave devices in the direction of miniaturization, broadband and low loss. The single-ended bandpass filter is an important part of the wireless communication system. The single-ended bandpass filter realized by the microstrip line is conducive to the integration and low cost of the system, and is especially widely used in the microwave frequency band. Therefore, realizing a single-ended microstrip bandpass filter with small size, broadband and low loss is in line with the development trend of the current wireless communication system, but the design of such a microstrip bandpass filter is still an important challen...

AI Technical Summary

Problems solved by technology

Although the size of the filter formed by these design methods is significantly reduced compared with the traditional implementation, with the development of wireless communication technology, the size of this type of design needs to be further reduced

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