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International Journal of Antennas and Propagation
Volume 2015 (2015), Article ID 385125, 8 pages
Research Article

High Gain Superstrate Loaded Membrane Antenna Based on Substrate Integrated Waveguide Technology

Department of Electrical Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia

Received 10 December 2014; Accepted 16 February 2015

Academic Editor: Chih-Hua Chang

Copyright © 2015 Hamsakutty Vettikalladi. 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.


The design and the results of a single slot coupled substrate integrated waveguide (SIW) fed membrane antenna loaded with a superstrate layer are presented for 94 GHz communication system. The membrane antenna is designed using ANSYS HFSS and consists of 6 layers. The microstrip patch antenna (MPA) placed on the top pyralux substrate layer is excited by means of a longitudinal rectangular slot placed over the SIW structure in the bottom pyralux substrate. The simulated antenna impedance bandwidth is found to be 5 GHz (91.5–96.5 GHz) with a gain of 7 dBi. In order to improve the gain a superstrate layer is added above the membrane antenna. The maximum gain achieved is 14.4 dBi with an efficiency of 77.6% at 94 GHz. The results are verified using CST Microwave Studio and are found to be in good agreement.