论文信息 - A Compact Multi-Layered Ultra-Wideband (UWB) Bandpass Filter with a Built-In Band-Rejection Filter

A Compact Multi-Layered Ultra-Wideband (UWB) Bandpass Filter with a Built-In Band-Rejection Filter

This paper proposes a compact multi-layered ultra- wideband (UWB) bandpass filter including a built-in band- rejection filter, for preventing the UWB communications from interfering with already-existing wireless communication systems. The band-rejection response obtained can be controlled flexibly by changing a coupling capacitance to the closest parallel metal plate or to the ground enclosure. In the finite element analysis and equivalent circuit simulation, a UWB performance of around 90% relative bandwidth and a widely-controllable band-rejection response were obtained. Also, experimental results show good agreement with those theory. This compact filter, originally designed based on the heft-handed composite right-/left-handed (CRLH) transmission line theory [1, 2], has a perfectly-shielded structure, a moderate group delay and excellent out-of-passband characteristics.

[1] Seong‐Ook Park,et al. Band-notched UWB planar monopole antenna with two parasitic patches , 2005 .

[2] Tatsuo Itoh,et al. Electromagnetic metamaterials : transmission line theory and microwave applications : the engineering approach , 2005 .

[3] K. Li,et al. Dual-Band Ultra-Wideband Bandpass Filter , 2006, 2006 IEEE MTT-S International Microwave Symposium Digest.

[4] T. Itoh,et al. Super-compact multilayered left-handed transmission line and diplexer application , 2005, IEEE Transactions on Microwave Theory and Techniques.

[5] Akira Tanaka,et al. A Compact Multi-Layered Wideband Bandpass Filter Exhibiting Left-Handed and Right-Handed Behaviors , 2006, IEICE Trans. Electron..

[6] Y. Horii,et al. A compact multilayered bandpass filter with transmission zeros for UWB applications , 2005, 2005 Asia-Pacific Microwave Conference Proceedings.

[7] Y. Horii,et al. A Compact Multi-Layered Ultra-Wideband Bandpass Filter With Plural Transmission Zeros and Improved Out-of-Passbands , 2006, 2006 IEEE MTT-S International Microwave Symposium Digest.