Table of Contents
International Journal of Microwave Science and Technology
Volume 2011, Article ID 980982, 9 pages
Research Article

Theoretical and Experimental Results of Substrate Effects on Microstrip Power Divider Designs

1Space Technology Department, Science and Technology Ministry, Baghdad 1125, Iraq
2Electrical and Electronic Department, Sulaimani Technical College, Sulaimani 2972, Iraq

Received 2 May 2011; Revised 7 July 2011; Accepted 7 July 2011

Academic Editor: Ning Hua Zhu

Copyright © 2011 Suhair Mansoor Mahmood and Asaad M. Jassim Al-Hindawi. 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 effects of substrate materials on the design of microstrip power divider are investigated theoretically and experimentally. Three dielectric substrate materials, Duroid 3003, G10/FR4 epoxy Glass, and Duroid 3010, are chosen to be studied. A three-way two-stage power divider is designed at S-band frequency of 2.25 GHz and etched on each studied substrate separately. The substrate effects on the characteristics and performance of the microsrip circuits are studied taking into consideration the large difference in dielectric constant and the dissipation factor. The circuit designs presented here are analyzed using the Genesys CAD program and implemented and tested experimentally. The simulated and measured results are compared and discussed, and they indicate that significant changes in the characteristics of the microstrip power divider are observed.