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Planar array of electric-LC resonators with broadband tunability
Author(s)
Withayachumnankul, Withawat
Fumeaux, Christophe
Abbott, Derek
Date Issued
July 4, 2011
Type
Article
Abstract
A planar array of microwave electric-LC (ELC) resonators with broadband tunability of the resonance frequency is presented in this letter. An ELC resonator is typically composed of inductive loops and a capacitive gap, resonant at a wavelength much larger than its physical dimension. Here, the original resonator is modified to accommodate a varactor and its accompanying dc bias enabling resonance tunability. The wideband operation can be achieved through strategic placement of the varactor. The robustness of the response for a large array containing hundreds of the varactor-loaded resonators is considered via a sensitivity analysis. The numerical and experimental results show that the fabricated array possesses a wide tuning range of nearly 32% with no significant resonance broadening, despite the tolerance in varactor characteristics. © 2011 IEEE.
Citation
IEEE Antennas and Wireless Propagation Letters, 10, 577-580, 2011