Abstract—This paper presents the study of two rhombus shape slot loaded rectangular microstrip antenna for quad band operation. The quad bands are achieved at S and C band of frequencies. Effect of slot embedded on the patch is studied experimentally for enhancing the bandwidth. It is found that by using two rhombus shape slots on the patch element with copper as ground plane, the bandwidth at C-band is enhanced from 2.06 % to 20.4 % without much affecting the operating bandwidth at C-band. Further enhancement of bandwidth at the C-band does not affect the nature of broadside radiation characteristics. Details of antenna design are described and experimental results are discussed. The proposed antennas may find applications for the systems operating at S and C-bands.

Index Terms—Microstrip antenna, quad band, rhombus, VNA, bandwidth.

Ambresh P. A. and A. M. Khan are with the Dept. of Electronics, Mangalore University, Mangalore 574199, Karnataka, India (e-mail: ambreshpa@rediffmail.com).
A. A. Sujata is with the Dept. of Electronics, Godutai Engineering College for Women, Gulbarga. Karnataka, India.
P. M. Hadalgi and P. V. Hunagund is with the Microwave Research Laboratory, Department of Applied Electronics, Gulbarga University, Gulbarga-585106, Karnataka, India.

Cite:Ambresh P. A., A. A. Sujata, A. M. Khan, P. M. Hadalgi, and P. V. Hunagund, "Quad Band Rectangular Microstrip Antenna for S and C-Band Applications," International Journal of Computer and Communication Engineering vol. 3, no. 5, pp. 334-337, 2014.