Search

A compact circular ring antenna with defected ground structure (DGS) has been design for Ultra-Wide Band (UWB) applications. Initially, a circular patch antenna is design by introducing a rectangular DGS structure. Further, slot has been inserted in circular patch to improve the impedance bandwidth. The proposed design covers the frequency range of 2.4-10.4GHz below -10dB. Proposed antenna has design and fabricated on FR-4 substrate having 1.5mm, 4.3 thickness and dielectric constant, respectively. The performance of the designed antenna is analyzing with optimized dimensions in terms of return loss, VSWR, radiation pattern, gain characteristics, group delay and surface current distributions. Further, performance analysis of the proposed antenna has also been compared with existing suggested antennas in literature with compact in size. The fabricated antenna shows a good result with simulations software. [ABSTRACT FROM AUTHOR]

A modified design technique of unidirectional circular patch antenna with parabolic shape ground plane for the application of microwave links is being presented here. Firstly, T-slots are inserted diagonally at the corners of parabolic ground plane in order to increase the directivity. Thereafter, for the further improvement in the directivity as well as gain the ellipse slot in circular patch has also been introduced. The microstrip feed line is given for the proposed unidirectional antenna. The simulation analysis of the antenna is done on software CST Microwave Studio using FR-4 substrate with dielectric constant 4.3. The simulated results and parametric analysis show a good return loss with respect to -10 dB. The radiation pattern characteristic, gain characteristic, VSWR pattern and surface current distribution performance of the antenna have also been compared at different resonate frequencies. [ABSTRACT FROM AUTHOR]