Abstract—In this paper, an open - ended rectangular waveguide antenna loaded with Triangular Split Ring Resonators and Wire Strip (TSRR-WS) radiating below the cut-off frequency of the waveguide is proposed. This work has investigated design development, simulation and miniaturization of an open end a waveguide dual band antenna. A novel technique was employed to miniaturize the open-ended radiator using electromagnetic metamaterials (MTM). The antenna is capable of radiating below the cutoff frequency of the waveguide by supporting backward waves. Comparing previous work of miniaturization of waveguides, a better bandwidth about 600 MHz, good matching and low profile (with 5 unit cell of MTMs) antenna is obtained.

Index Terms—dual band antenna, metamaterials, waveguide

M. Jalali is with the Islamic Azad University of Urmia branch, Iran (phone: 098-914-389-9112); e-mail: Jalali.mahdi@ gmail.com).
T. Sedghi was with the Islamic Azad University of Urmia branch, Iran. He is now with the Department of electrical engineering, Urmia University, Iran (e-mail: st_t.sedghi@urmia.ac.ir).
Y. Zehforoosh is with the Electrical Engineering Department, Islamic Azad university of Urmia, Iran, (e-mail: y.zehforoosh@srbiau.ac.ir).

Cite: M. Jalali, T. Sedghi and Y. Zehforoosh, "Miniaturization of Waveguides Dual Band Antenna Using TSRR-WS Metamatrerials," International Journal of Computer and Electrical Engineering vol. 1, no. 5, pp. 624-626, 2009.