Design of a planar tunable antenna based on the rectangular aperture

Shengjun Wei and Quanyuan Feng

Journal of Electromagnetic Waves and Applications, 2014, vol. 28, issue 10, 1203-1211

Abstract: In this paper, a coplanar waveguide (CPW)-fed planar antenna with frequency tuning capability and broadband characteristic is proposed. The antenna consists of a CPW feeding line, an arrow-shaped stub, a rectangular aperture, and two symmetric square apertures carved on the ground plane. Based on the narrow slot etched out, two varactors are employed as tunable elements to load into the slot. With the configuration adopted, the low frequency narrow band and the high frequency wide band are obtained. Results show that the low frequency tunable channel ranging from 1.5 to 2.05 GHz is achieved while the high frequency wide band maintaining. Further, the measured radiation patterns and gains exhibit relatively stable characteristics.

Date: 2014
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DOI: 10.1080/09205071.2014.910145

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