A Novel Compact Ultra-Wideband Bandpass Filter Using Microstrip Stub-Loaded Tri-Mode Resonator
- Resource Type
- Conference
- Authors
- Hu, Hong-Hong; Gao, Shan; Xiao, Zhong-Yin
- Source
- 2008 China-Japan Joint Microwave Conference Microwave Conference, 2008 China-Japan Joint. :551-553 Sep, 2008
- Subject
- Engineered Materials, Dielectrics and Plasmas
Fields, Waves and Electromagnetics
Aerospace
Communication, Networking and Broadcast Technologies
Photonics and Electrooptics
Ultra wideband technology
Band pass filters
Microstrip filters
Microstrip resonators
Passband
Resonator filters
Coupling circuits
Attenuation
Inverters
Size control
- Language
- ISSN
- 2165-4727
One novel compact ultra-wideband filter is presented by using a tri-mode resonator and coupled-line sections as inverter circuits. Open stub-loaded are used to widen the passband of filter without aperture-enhanced coupled line structure. Five transmission poles in the passband are shown. Two sharp attenuation poles can be located close to either side of the desired pass band. The passband of filter and the locations of attenuation poles can be controlled by the sizes of the open stubs. The simulated results demonstrate that the insertion loss is lower than 0.5 dB in the passband (3.9-10.1GHz); about 90% FBW is achieved; and the group delay variation in the passband is less than 0.5 ns.