Summary
International Symposium on Antennas and Propagation
2010
Session Number:4FA1
Session:
Number:4FA1-4
Embedded Slot Antenna with V-Slot DGS
M. Esa, M. S. Awang, N. N. N. A. Malik, N. M. A. Latiff, R. Arsat, N. A. Samsuri,
pp.-
Publication Date:2010/11/23
Online ISSN:2188-5079
Summary:
The performance of microstrip patch antenna can be improved by employing a technique to improve that involves defected ground structure (DGS) [1]-[4]. DGS provides slow wave effect in the frequency below band-gap and fast-wave effect above the band-gap frequency [5]. DGS adds an extra lumped capacitance and inductance to the distributed line. A major benefit is the ability to reduce undesired cross-polarisations. The technique has been proven to improve some characteristics of the antenna for certain applications such as reduce mutual coupling in a microstrip array, and reduce cross polarisation radiation on a single element. Simple design structures are etched on the ground plane of the antenna. This will disturb the current distribution that will simultaneously improve the performance of the antenna. In this paper, the design of a microstrip slot antenna [6] is modified by having DGS element embedded in the ground plane. The DGS has the shape of a V-slot. Both antennas with and without the DGS element have been successfully simulated and measured. It was found that the microstrip slot antenna with V-slot DGS outperforms its counterpart in terms of suppressed cross-polarisation and broadened impedance bandwidth. The antennas are named as WA and WAV antenna sets. The effects of introducing the V-slot DGS onto WA’s ground plane have been successfully investigated [7].