Wide band microstrip patch antenna for S & C band applications

Abstract

A fractal is a repeated or similar structure having a fractional dimension. This type of shape having repetitive structure so the electrical length can be increased with introducing multiple slots. That we can get fine edge length structure. By recursive nature multiple objectives can be achieved. Size of the antenna is continuously decreasing with the development of patch antenna. In this paper a square shaped square slotted antenna is investigated, which is compact printed wide band antenna. A rectangular microstrip patch antenna chosen with three slots for wide band application. When ground is modified it is called defected ground structure by which bandwidth can be further increased, and overall a wideband antenna is simulated using HFSS simulation software. So this antenna is useful for many applications in S & C band, the size of the antenna is reduces. This paper represents the combination of rectangular antenna with rectangular slots. Proposed design has resonant frequency of 4.7GHz with the operating range from 3.2GHz to 14.3GHz with bandwidth of 11.1GHz. Using proposed antenna design and micro strip feeding at proper position acceptable resultant frequency, return loss, VSWR and bandwidth is achieved. For the design of the micro strip antenna we have used FR-4substrate which has permittivity of 4.4 and thickness 1.6, loss tangent is 0.02. HFSS simulation software is used for designing and analysis. We have observed that using slotted patch antenna and using micro strip at proper location we can get better return loss, VSWR, and wideband.