A Quasi-Lumped Element Series Array Resonator Antenna

Abstract

This paper presents a 6-element series array quasi-lumped element resonator antenna. The proposed antenna employs an interdigital capacitor in parallel with a straight strip conductor whose center finger is shorted across the capacitor. An array configuration is imperative as the gain of a single quasi-lumped element arrangement was only moderate and specifically put at about 9.4 dBi which may not be adequate for long distance communications. Relevant Equations for radiation pattern of the quasilumped element resonator (QLER) were derived and presented. The proposed antenna array exhibits a gain enhancement up to about 29.47% with a noticed size reduction of 80 × 30 sq. mm. Compared to standard long wire antenna and other approaches of capacitive loaded long wire antennas, it was proved that the proposed antenna has a relatively better performance yet with significant size reduction. Consequently, it is an ideal candidate for MMIC designs and wireless communication applications.

Lumped Elements and Its Existence in Quasi Lumped Element Resonator Antenna

“…By understanding the behavior of these lumped elements, the antenna behavior can be predicted. Lumped elements are passive components in microwave circuits whose size across any dimension is much smaller than the operating wavelength to ensure that there is no appreciable phase shift between the input and output terminals [3]. When using lumped elements at RF and microwave frequencies, the maximum dimensions for these components should be about λ/20, where λ is the guide wavelength [4].…”