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Pulse injection for real‐time monitoring of tunable high‐Q filters
Author(s) -
Khater M. Abu,
Peroulis D.
Publication year - 2014
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.28187
Subject(s) - microwave , resonator , filter (signal processing) , materials science , substrate (aquarium) , microwave cavity , pulse (music) , optoelectronics , electronic engineering , band pass filter , electrical engineering , engineering , telecommunications , detector , oceanography , geology
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