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Theoretical and Experimental Analysis of Automatic Frequency Control Techniques for Microwave Active Filters

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5 Author(s)
Quintanel, S. ; I.R.C.O.M - UMR CNRS n°6615 - University of Limoges - Faculty of sciences, 123, Avenue Albert Thomas 87060 Limoges Cedex - France. ; Serhan, H. ; Jarry, B. ; Billonnet, L.
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The paper discusses Phase Locked Loop (PLL) and Magnitude Locked Loop (MLL) techniques based on Voltage Controlled Filter (VCF), for the Automatic Frequency Control (AFC) of active filters. Applications to a microwave planar filter are considered. Theoretical analysis, simulated and measured results are presented for both phase and magnitude control circuits enabling the filter to accurately track a reference signal.

Published in:

Microwave Conference, 2000. 30th European

Date of Conference:

Oct. 2000