Multi-scale tunable filter covering a frequency range of 6.5:1

A multi-scale filter topology is proposed in the form of a switched comb-line structure loaded by varactors. This topology is capable of implementing a tunable frequency response with consistent performance over very large tuning ranges. Two prototype filters of orders two and four have been fabricated in a coplanar geometry. The filters are tunable in a 6.5:1 frequency range.

[1]  G.M. Rebeiz,et al.  Low-Loss 5.15–5.70-GHz RF MEMS Switchable Filter for Wireless LAN Applications , 2006, IEEE Transactions on Microwave Theory and Techniques.

[2]  J.I. Alonso,et al.  Tunable combline filter with continuous control of center frequency and bandwidth , 2005, IEEE Transactions on Microwave Theory and Techniques.

[3]  A. Abbaspour-Tamijani,et al.  Switchable Bandpass Filter for 0.3-0.6 GHz , 2007, 2007 IEEE/MTT-S International Microwave Symposium.

[4]  Laurent Dussopt,et al.  Miniature and tunable filters using MEMS capacitors , 2003 .

[5]  Gabriel M. Rebeiz,et al.  A differential 4-bit 6.5-10-GHz RF MEMS tunable filter , 2005, IEEE Transactions on Microwave Theory and Techniques.

[6]  Gabriel M. Rebeiz,et al.  A varactor-tuned RF filter , 2000 .

[7]  A. Abbaspour-Tamijani,et al.  Tunable Filters With Nonuniform Microstrip Coupled Lines , 2008, IEEE Microwave and Wireless Components Letters.

[8]  V. Ziegler,et al.  Very low complexity RF-MEMS technology for wide range tunable microwave filters , 2005, 2005 European Microwave Conference.