Author :
Zheng, Shao Yong ; Chan, Wing Shing
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Hong Kong, China
Abstract :
By employing the coplanar waveguide feeding method, a dual-band dual-mode bandpass patch filter, with flexible frequency ratio and fractional bandwidth, is proposed. Two resonant frequency bands are achieved by using two stacked square patches with different cross slots etched, which are simultaneously excited by the centre CPW fed lines. The frequency ratio and fractional bandwidths can be controlled by the CPW broadside coupling and cross slots. To verify the proposed configuration, two dual-band bandpass patch filters have been designed, fabricated and measured.
Keywords :
band-pass filters; coplanar waveguides; CPW broadside coupling; centre CPW fed lines; compact dual-band dual-mode bandpass patch filter; coplanar waveguide feed method; cross slots; flexible frequency ratio; fractional bandwidth; resonant frequency bands; two stacked square patches;
Journal_Title :
Electronics Letters
