Design of two-stage UIR and SIR bandpass filters with an elliptic function-like response
- Resource Type
- Conference
- Authors
- Jen-Tsai Kuo; Wan-Hsin Hsieh; Meshon Jiang
- Source
- 2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No.04CH37535) Microwave symposium digest Microwave Symposium Digest, 2004 IEEE MTT-S International. 3:1609-1612 Vol.3 2004
- Subject
- Fields, Waves and Electromagnetics
Engineered Materials, Dielectrics and Plasmas
Fields, Waves and Electromagnetics
Aerospace
Communication, Networking and Broadcast Technologies
Photonics and Electrooptics
Band pass filters
Filtering theory
Impedance
Resonator filters
Passband
Couplings
Microwave filters
Frequency
Circuits
Microstrip filters
- Language
- ISSN
- 0149-645X
Two-stage bandpass filters with a sharp transition band are presented. The two stages are cascaded by a direct coupling scheme, as well as a three-line structure. Each half-wave resonator is trapped with a quarter-wave open stub at its center and a transmission zero can be created. The positions of the two zeroes can be easily tuned to locate close to the passband, so that an elliptic function-like response can be obtained. Both uniform impedance resonators (UIRs) and stepped impedance resonators (SIRs) are employed in the design. Experimental results show a close agreement with the design.