Flexible RF one-chip active filter based on recursive architecture in UHF range

This paper reports development of an integrated tunable active filter for lower UHF band based on the recursive architecture and its application. The recursive filter core gives the 2-pole bandpass response, and its center frequency can be tuned from 270 to 850 [MHz]. The auto setting mechanism was developed for the filter center frequency and passband width. Higher order filters were synthesized by combining multiple cores.

[2]  Jon M. Peha,et al.  Sharing Spectrum Through Spectrum Policy Reform and Cognitive Radio , 2009, Proceedings of the IEEE.

[3]  C. Svensson,et al.  A tuned, inductorless, recursive filter LNA in CMOS , 2002, Proceedings of the 28th European Solid-State Circuits Conference.

[4]  B. V. D. Pol.  The Nonlinear Theory of Electric Oscillations , 1934 .

[5]  A. Zahedi,et al.  Design and simulation of recursive RF filter by using HEMT technology , 2012, 2012 IEEE 8th International Colloquium on Signal Processing and its Applications.

[6]  S. Darfeuille,et al.  Silicon-Integrated Differential Bandpass Filters Based on Recursive and Channelized Principles and Methodology to Compute Their Exact Noise Figure , 2006, IEEE Transactions on Microwave Theory and Techniques.

[7]  Sang Yun Lee,et al.  Area spectrum efficiency of TV White Space wireless system with transmit power control , 2010, 2010 The 12th International Conference on Advanced Communication Technology (ICACT).