Enhanced Stop-band Reffection by Symmetric Feeding in 1.8GHz Cross-coupled Planar HTS Microwave Filters
The superior performance manifested in characteristics of low pass-band insertion loss, high stop-band reffection, and sharp band edge skirt, has led the superconducting microwave filters one of the most attractive candidates for wireless communication applications. In this paper, we report the design and fabrication of the 4-poles cross-coupled planar microwave filters fabricated using YBCO superconducting thin films deposited on both sides of a LAO single crystal substrate by pulsed laser deposition. The resonator geometry allows one to miniaturize the 1.8 GHz filters onto a substrate with dimensions of 1 cm×1 cm. We also demonstrate that by properly choosing the feeding configuration, filters with better seffectivity, in particular with an additional pair of deep transmission zeros (poles) outside both sides of pass-band, can be achieved.
Hui-Kai Zeng Kaung-Hsiung Wu Tseng-Ming Uen Yi-Shun Gou Jenh-Yih Juang
Department of Electrophysics, Chiao-Tung University 1001 Ta Hsueh Road, Hsinchu 30050, Taiwan, China Department of Electrophysics, Chiao-Tung University 1001 Ta Hsueh Road, Hsinchu 30050, Taiwan, China Department of Electrophysics, Chiao-Tung University 1001 Ta Hsueh Road, Hsinchu 30050, Taiwan, China
国际会议
Progress in Electromagnetics Research Symposium 2007(2007年电磁学研究新进展学术研讨会)(PIERS 2007)
北京
英文
1057-1062
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）