Title :
Compact bandpass filters based on microstrip and coplanar waveguide resonators
Author :
Kuo, Tsung-Nan ; Lin, Shih-Cheng ; Wang, Chi-Hsueh ; Chen, Chun Hsiung
Author_Institution :
Nat. Taiwan Univ., Taipei
Abstract :
A compact bandpass filter using both microstrip and coplanar waveguide (CPW) quarter- wavelength resonators is proposed. By combining the merits of two-layer layout and stepped-impedance resonators, a filter with various degree of couplings and reduced size may be realized. Moreover, due to the higher spurious resonant frequencies of stepped- impedance CPW resonators, the filter with wide stopband may be achieved. In this study, a compact fourth-order filter composed of two microstrip and two CPW quarter-wavelength resonators is demonstrated and fabricated on the FR4 substrate.
Keywords :
band-pass filters; coplanar waveguides; resonator filters; FR4 substrate; compact bandpass filters; fourth-order filter; microstrip-coplanar waveguide resonators; stepped- impedance CPW resonators; stepped-impedance resonators; two-layer layout; Band pass filters; Coplanar waveguides; Coupling circuits; Frequency; Impedance; Microstrip filters; Microstrip resonators; Microwave filters; Passband; Resonator filters; Bandpass filter; coplanar waveguide (CPW); microstrip; quarter-wavelength resonator; stepped-impedance resonator;
Conference_Titel :
Microwave Conference, 2006. APMC 2006. Asia-Pacific
Conference_Location :
Yokohama
Print_ISBN :
978-4-902339-08-6
Electronic_ISBN :
978-4-902339-11-6
DOI :
10.1109/APMC.2006.4429675
