Title :
Wideband bandpass filter using parallel-coupled line and step-impedance open stubs
Author :
Cai, Peng ; Guan, Xuehui ; Yang, Xuexia ; Zhang, Yong ; Chen, Bin ; Huang, Jian ; Wu, Yunsong
Author_Institution :
Sch. of Electron. Sci., Jiangxi Univ. of Finance & Econ., Nanchang, China
Abstract :
A novel wideband bandpass filter using parallel-coupled line and step-impedance open stubs is presented in this paper for use in wideband wireless communication applications. In the proposed filter configuration, step-impedance open stubs are introduced to both sides of the parallel-coupled line in order to produce transmission zeros near the passband. As a consequence, the filter is compact in size and exhibits sharp attenuation characteristic near its passband as well as wide stopbands. On the other hand, the bandwidth of the filter is controlled by adjusting the impedance ratio of the step-impedance open stub. The filter is successfully realized in theory and verified by full wave EM simulation. Theoretical filtering responses show good agreement with the simulated results.
Keywords :
band-pass filters; full wave EM simulation; parallel-coupled line; step-impedance open stubs; transmission zeros; wideband bandpass filter; wideband wireless communication applications; Band pass filters; Bandwidth; Couplings; Filtering theory; Frequency; Impedance; Passband; Resonator filters; Wideband; Wireless communication; parallel-coupled line; step-impedance open stubs; transmission zeros; wideband bandpass filter;
Conference_Titel :
Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2009 3rd IEEE International Symposium on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-4076-4
DOI :
10.1109/MAPE.2009.5355879