Table of Contents
International Journal of Microwave Science and Technology
Volume 2015, Article ID 629797, 11 pages
Research Article

Logarithmic Slots Antennas Using Substrate Integrated Waveguide

Department of Electronics and Communication Engineering, Charotar University of Science & Technology, Changa, Anand, Gujarat, India

Received 29 May 2015; Revised 24 August 2015; Accepted 13 September 2015

Academic Editor: Xianming Qing

Copyright © 2015 Jahnavi Kachhia et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper represents new generation of slotted antennas for satellite application where the loss can be compensated in terms of power or gain of antenna. First option is very crucial because it totally depends on size of satellite so we have proposed the high gain antenna creating number of rectangular, trapezoidal, and I shape slots in logarithm size in Substrate Integrated Waveguide (SIW) structure. The structure consists of an array of various shape slots antenna designed to operate in C and X band applications. The basic structures have been designed over a RT duroid substrate with dielectric constant of 2.2 and with a thickness of 0.508 mm. Multiple slots array and shape of slot effects have been studied and analyzed using HFSS (High Frequency Structure Simulator). The designs have been supported with its return loss, gain plot, VSWR, and radiation pattern characteristics to validate multiband operation. All the proposed antennas give gain more than 9 dB and return loss better than −10 dB. However, the proposed structures have been very sensitive to their physical dimensions.