Chebyshev equal-ripple;
microstrip line and slotline;
synthesis design;
ultra-wideband (UWB) bandpass filter (BPF);
D O I:
10.1109/LMWC.2009.2017590
中图分类号:
TM [电工技术];
TN [电子技术、通信技术];
学科分类号:
0808 ;
0809 ;
摘要:
A class of ultra-wideband (UWB) bandpass; filters (BPFs) with designable transmission poles is presented. Transmission poles are controlled in number by introducing m-section non-uniform transmission line in the center of a transmission-line multiple mode resonator. With the help of increased transmission poles, the constituted filter achieves deeper rejection skirts and wider bandwidths. In the design, a synthesis approach is developed to synthesize this filter with the target of Chebyshev equal-ripple frequency responses. As an example, a six-pole UWB BPF is implemented on hybrid microstrip line and slotline structures. The measured results validate and confirm the theoretical prediction.