%0 Journal Article
%A HU Shan-wen
%A ZHANG Xin-lei
%A ZHANG Zhi-tao
%A ZHU Wei-guang
%A ZHENG Hai-yu
%T Design of a Microstrip Hairpin Bandpass Filter with Wide Stopband
%D 2021
%R 10.13190/j.jbupt.2020-077
%J Journal of Beijing University of Posts and Telecommunications
%P 92-96
%V 44
%N 1
%X To obtain a highly selective, wide stopband filter and meet the requirement of sub-6GHz band compact portable communication devices,a new type of microstrip hairpin bandpass filter is proposed. Compared with the conventional structure,the proposed adds a quarter-wavelength open microstrip line to the resonance unit which is connected to the input and output ends,and adds metal holes on both sides of the input feeder of the filter. The wide stopband is achieved by transmission zeros at the parasitic passband. The proposed filter is processed and tested. It is shown that it can realize a wide stopband and has good frequency selection characteristics.
%U https://journal.bupt.edu.cn/EN/10.13190/j.jbupt.2020-077