Pulse injection for real-time monitoring of tunable high-Q filters

ABSTRACT A new measurement technique for monitoring the frequency of high‐Q microwave tunable filters in real time is presented in this work. Relying on the natural response of a cavity resonator, the technique provides the operating frequency information in a binary digital format, making it easy t...

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Bibliographic Details
Published in:Microwave and optical technology letters 2014-03, Vol.56 (3), p.761-764
Main Authors: Khater, M. Abu, Peroulis, D.
Format: Article
Language:English
Subjects:
adaptive filters
Cavity resonators
filter monitoring
filters
tunable circuits and devices
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Summary:ABSTRACT A new measurement technique for monitoring the frequency of high‐Q microwave tunable filters in real time is presented in this work. Relying on the natural response of a cavity resonator, the technique provides the operating frequency information in a binary digital format, making it easy to read and process. The presented methodology is experimentally demonstrated on band‐stop filters, implemented by highly loaded substrate‐integrated cavities in the 1.5 GHz range. Measured results show that the changes in frequency as small as 2–20 MHz (0.13–1.3%) can be detected for a tunable cavity filter (1.42–1.65 GHz) within 1 ms, based on commercial‐off‐the‐shelf components. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:761–764, 2014
ISSN:0895-2477
1098-2760
DOI:10.1002/mop.28187