A Single-Feed Small Circularly Polarized Square MSA and Cavity Model for Square Patch Antenna
Avinash Pawar

Avinash Pawar, Instrumentation, Vpm’s Mpcoe, Velneshwar (Ratnagiri), India.
Manuscript received on November 11, 2013. | Revised Manuscript received on November 15, 2013. | Manuscript published on November 25, 2013. | PP:27-31 | Volume-2 Issue-1, November 2013. | Retrieval Number: A0577112113/2013©BEIESP

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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: Communication between humans was first by sound throughvoice. With the desire for slightly more distance communication came, devices such as drums, then, visual methods such as signal flags and smoke signals were used. These optical communication devices, of course, utilized the light portion of the electromagnetic spectrum. It has been only very recent in human history that the electromagnetic spectrum, outside the visible region, has been employed for communication, through the use of radio. One of humankind’s greatest natural resources is the electromagnetic spectrum and the antenna has been instrumental in harnessing this resource. The design of a single-feed small micro strip antenna with circular polarization (CP) radiation is described. This design is achieved by cutting slits in the square patch and, by adjusting the lengths of the slits; the micro strip antenna can perform CP radiation with a reduced patch size at a fixed operating frequency. This design also provides a wide CP bandwidth and relaxed fabrication tolerances. In cavity, it is shown that for a feed offset from one corner of the patch, the perturbation segment (∆S) is increased, thereby reducing the effect of manufacturing errors.
Keywords: Single feed, micro strip antenna ,single feed