1P. Beigi is with the Department of Electrical Engineering, Science and Research Branch, Islamic Azad University, West Azarbaijan, Iran.
4Department of Electrical Engineering, Urmia Branch, Islamic Azad University, Urmia, Iran
A compact novel CPW-fed antenna with square spiral-patch for multiband applications is presented. The antenna consists of a square-spiral patch with two L-shape strips. With subjoin square spiral the number of frequency resonance is increasing. Also by introducing two L-shaped strips in the inside of square spiral, much wider impedance bandwidth can be produced, especially at the higher bands. The operating frequencies of the proposed antenna are 2.62/3.40/4.42/5.92/8.32 GHz. Some key parameters affecting the antenna performance have been analysed using computer simulations. To validate the simulation results, the prototypes of the proposed antenna are fabricated on an inexpensive FR-4 substrate and tested. Good radiation characteristics of the proposed antenna have been obtained. The simulated and measured results are in good agreement