Abstract
A wide band EBG resonator antenna with two layer of dielectric superstrates of the same material is design which is operating in X band. The EBG superstrates act as Partially Reflective Surfaces (PRS) having positive reflection phase curve which are suspended above a double sided dipole patch antenna fed by a coaxial cable pass through ground plane. Thus a resonator cavity is constructed which increases the bandwidth and gain of the feed antenna. The measured results validate the simulation results obtain from Computer Simulation Technology (CST) microwave studio. These results show that the antenna posses a 3 dB gain bandwidth from 8.5 GHz to 11.2 GHz, with a peak gain of 15.3 dBi. Furthermore, the scattering parameter S11 is well within range from 8.6 GHz to 11 GHz.
Highlights
Electromagnetic Band Gap (EBG) structure is extensively studied in the last decade due to its potential in controlling the electromagnetic wave for various applications
The simulation results are obtain from Computer Simulation Technology (CST) 2012 using full wave analysis which are validated with the help of measured results which are obtain with the help of an Agilent Vector Network Analyzer (VNA) E8363B
It is observed that the bandwidth of proposed EBG antenna drastically increases in comparison to the feed antenna mostly towards the lower frequencies
Summary
Electromagnetic Band Gap (EBG) structure is extensively studied in the last decade due to its potential in controlling the electromagnetic wave for various applications. The expression given in (3) illustrates that a wideband EBG resonator antenna could be obtained by using a superstrate with a reflection phase of positive slope at the desired frequency Superstrate with these characteristics can be constructed by 2-D printed metal strips [18] and 1-D dielectric substrates [19], respectively, and used in several antenna designs [20,21,22,23,24]. A mushroom type high impedance surface (HIS) with size-tapered patches and a single layer printed FSS were applied as the ground plane and the PRS, respectively, in the design of a wideband FP resonator antenna [10]. The simulated results obtain from CST are validated by the measured results
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