1. Ultra-Wideband Bandpass Filter With Multiple Notch Bands Using Nonuniform Periodical Slotted Ground Structure.
- Author
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Zhang-Cheng Hao, Jia-Sheng Hong, Parry, Jonathan P., and Hand, Duncan P.
- Subjects
- *
ULTRA-wideband devices , *BANDPASS filters , *ELECTRIC lines , *RADAR equipment , *POLYMER liquid crystals - Abstract
A novel ultra-wideband (UWB) bandpass filter that is capable of integrating multiple notch bands is proposed in this paper. A multilayer nonuniform periodical structure, which can generate multiple transmission zeros, is deployed in the filter design to improve the selectivity and upper stopband performance of the filter. Short-circuited stub resonators are then integrated to obtain multiple notch bands. The compact footprint of the filter is achieved. UWB filters of this type without a notch and with single-, double-, and triple-notch bands are designed to meet the Federal Communications Commission-defined UWB indoor limit. The designed filters are verified by experiments and fabricated by using multilayer liquid-crystal polymer lamination technology. Both full-wave simulated and measured results are presented and good agreement between them is observed. The proposed filter has good performance and is attractive for UWB communication and radar systems. [ABSTRACT FROM AUTHOR]
- Published
- 2009
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