A linear array quasi-lumped element resonator antenna with a corporate-feed network

Abstract

A linear array quasi-lumped element resonator antenna with parallel feed network is presented. The proposed antenna was excited by a corporate feed network. The antenna element consists of the interdigital capacitor in parallel with a straight narrow strip inductor. The inductor is the centre finger and shorted across the interdigital capacitor. With the pads connected at both ends of the structure, adjustment to tune the resonant frequency of the resonator is possible. Seeing that the proposed antenna is a lumped element, it is estimated that significant size reduction is realizable with attendant low mass, low volume, and low cost. Therefore, the individual radiating element has a small footprint area of 0.112λ 0 × 0.108λ 0 , and thus reduced the overall antenna real estate moderately. The measured gain of the array operating at 5.8 GHz is 16.20 dBi. The proposed antenna exhibits moderate bandwidth enhancement and reasonable directional characteristics.