Antenna Essay

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2013 IEEE Business Engineering and Industrial Applications Colloquium (BEIAC) Aperture Coupled Dielectric Resonator Antenna Design with Flat Reflector S. M. Ali, M. A. Zakariya*, Z. Baharudin, M. H. Md. Khir, A. A. Baba, J. J. ADZ Department of Electrical and Electronic Engineering Universiti Teknologi PETRONAS Tronoh, Perak, Malaysia *mazman_zakariya@petronas.com.my Abstract- A single element circular slot aperture coupled Cylindrical Dielectric Resonator Antenna (CDRA) with a flat reflector is designed and presented. The measured bandwidth of the antenna is about 1.8 % (5.32 - 5.52) while the simulated bandwidth is 1.11% (5.32 - 5.44 GHz). A comprehensive parametric study has been conducted to realize the effects of slot size, slot position and reflector parameters to increase the directivity of the designed antenna. The experimental results show that the antenna covers 5 GHz band, which satisfies the basic requirement of the WLAN application IEEE 802.11a. Keywords- Cylindrical Dielectric Resonator Antenna (CDRA); aperture coupling; circular slot; flat reflector antenna placed on a circular slot etched on the ground plane. An aluminum reflector has been used to reduce the back radiation. The effect of changing the slot sizes, slot positions and the reflector sizes has also been studied. The proposed antenna is suitable for WLAN application 802.11a which works over the 5.0 GHz band. Simulation of the antenna is carried out using CST Microwave Studio 2009 software. II. ANTENNA DESIGN The geometry of the aperture coupled CDRA is given in Fig. 1. The antenna comprises of one cylindrical dielectric resonator antenna placed on the circular slot of radius 4.5 mm which is etched from the centre of the substrate. The CDRA used has permittivity of 55.0, radius of 7.0 mm and height of 2.0 mm. The width Wf of the microstrip line used is 2.0 mm for a 50.0 Ω system

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