Journal of Earth Science & Climatic Change
Open Access

Abstract

C onventional Microwave antennas in general are linearly polarized antennas which operate at a single resonance frequency and have low gain & narrow bandwidth therefore these antennas could not find practical applications in modern communication systems. However their compact size forced antenna designers to modify them to achieve higher bandwidth and gain performance. In the present paper, extensive simulation and experimentation is done to achieve compact circularly polarized antennas with higher gain and wide bandwidth. Input impedance, return loss, gain, VSWR and radiation patterns in different planes are simulated through procured simulation software and based upon these simulation results, planar antennas are fabricated & tested with available resources. The simulation analysis of compact planar antennas is carried out by applying procured simulation software. By selecting proper feed location so that input impedance to feed line, different antenna parameters will be simulated. Based upon simulated outcome, antennas on RT Duroid/Glass epoxy FR4 substrate are fabricated with procured machine and tested with procured experimental setup. Return loss and input impedance are measured through vector network analyzer. Radiation patterns of fabricated antenna will be measured in anechoic chamber. To avoid reflections, we put the antenna geometries inside the anechoic box. This paper on antennas has a significant application in communication research where compact antennas are needed for operation in wireless and mobile communication systems. Basic micro strip geometries are small in size and in their conventional form; these are linearly polarized and operate normally at a single frequency. They also have narrow bandwidth and low gain but their compact size over shadows these limitations of patch antennas. Therefore designing and development of such antenna has its own importance.

Biography

Manisha Gupta is Associate Professor in the Department of Physics at JECRC University, Jaipur, Rajasthan. She has 14 years? experience of Teaching and Research. She has done Ph.D. from University of Rajasthan, on ?Computer aided designing of Micro-strip patch and array antennas in different environmental conditions?. She has published papers in various national and international journals and conferences. One of the papers has been awarded a certificate of merit by Institution of Engineers (India) (IEI). She has organized various IEEE, DST, IETE, MNRE, ISTE sponsored National conferences. She has been awarded by ?Rajasthan Energy Conservation Award-2010? by Hon. Chief Minister Mr. Ashok Gehlot for outstanding contribution in the field of Energy Conservation.