Withayachumnankul, W.Fumeaux, C.Abbott, D.2011-10-112011-10-112011IEEE Antennas and Wireless Propagation Letters, 2011; 10:577-5801536-12251548-5757http://hdl.handle.net/2440/66633A 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.en© Copyright 2011 IEEE – All Rights ReservedJournal article002011050010.1109/LAWP.2011.21587940002921116000072-s2.0-7995974144528853Withayachumnankul, W. [0000-0003-1155-567X]Fumeaux, C. [0000-0001-6831-7213]Abbott, D. [0000-0002-0945-2674]