Multiresolution Channel-Select Filter With Ultrawide Frequency Coverage

A multiresolution channel select filter topology is proposed for implementing a digitally-tunable bandpass response with ultra-wideband tuning range. This filter is composed of a chain of bimodal filter stages with self-complementary periodic frequency response. The frequency response behavior of this filter, the effect of parasitics, and the nonlinearities are studied in detail. A four-stage implementation is presented which is based on p-i-n diode switches and covers dc-2.5 GHz in 16 equal bandwidth channels with a maximum insertion loss of 6.7 dB.

[1]  Ching-Wen Tang,et al.  A Microstrip Ultra-Wideband Bandpass Filter With Cascaded Broadband Bandpass and Bandstop Filters , 2007, IEEE Transactions on Microwave Theory and Techniques.

[2]  R. Levy,et al.  Synthesis of Symmetrical Branch-Guide Directional Couplers , 1968 .

[3]  Gabriel M. Rebeiz,et al.  Intermodulation distortion and power handling in RF MEMS switches, varactors, and tunable filters , 2003 .

[4]  A multi-resolution channel-select filter with ultra-wide frequency coverage , 2008, 2008 IEEE MTT-S International Microwave Symposium Digest.

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

[6]  C. S. Hartmann,et al.  Selectable Bandpass Filters - Multichannel Surface Wave Devices , 1973 .

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

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

[9]  Jia-Sheng Hong,et al.  Microstrip filters for RF/microwave applications , 2001 .

[10]  R. J. Wenzel.  Application of Exact Synthesis Methods to Multichannel Filter Design , 1964 .

[11]  Masoud Koochakzadeh,et al.  Miniaturized Transmission Lines Based on Hybrid Lattice-Ladder Topology , 2010, IEEE Transactions on Microwave Theory and Techniques.

[12]  M. Koochakzadeh,et al.  Closed-Form Formulas for Predicting the Nonlinear Behavior of All-Pole Bandpass Filters , 2008, IEEE Transactions on Microwave Theory and Techniques.

[13]  G. Kompa.  Practical microstrip design and applications , 2005 .

[14]  B. Pillans,et al.  6-15 GHz RF MEMS tunable filters , 2005, IEEE MTT-S International Microwave Symposium Digest, 2005..

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

[16]  Eli Yablonovitch,et al.  A tunable wavelength demultiplexer using logarithmic filter chains , 1998 .

[17]  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.

[18]  Sang-June Park,et al.  High Performance RF-MEMS Tunable Filters. , 2008 .

[19]  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.

[20]  Masoud Koochakzadeh,et al.  Multi-scale tunable filter covering a frequency range of 6.5:1 , 2008, 2008 IEEE MTT-S International Microwave Symposium Digest.

[21]  J. Rhodes,et al.  Explicit design formulae for wideband bandpass filters , 1979 .

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

[23]  Gabriel M. Rebeiz,et al.  A 25–75-MHz RF MEMS Tunable Filter , 2007, IEEE Transactions on Microwave Theory and Techniques.

[24]  R. Levy,et al.  A Generalized Multiplexer Theory , 1979 .

[25]  R. V. Snyder.  A wide-band tunable filter technique based on double-diplexing and low-Q tuning elements , 2000, 2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017).