2025/07/08 by Asadpor, Loghman
#Circular Polarization #Defected Ground Structure #Periodic open-end slit #Spiral Shaped Antenna #WiMAX/Wi-Fi/WLAN
paper · doi:10.57647/j.mjee.2025.1902.25
A miniaturized quadruple-band antenna with a spiral-shaped patch is proposed to cover wireless system bands including GSM, Wi-Fi/WLAN (IEEE 802.11b/g/n), Extended UMTS (IEEE 802.11y), WiMAX and the Wi-Fi/WLAN2 (IEEE 802.11a/h/j). The antenna design features a CPW-fed configuration with a spiral-shaped patch, vertical slot, and open-end slits in a rectangular ground plane. In the design of this antenna, the POES structure is used to improve the characteristics of the antenna. A prototype antenna was constructed and tested, demonstrating operation across four frequency bands ranging from 1.71 GHz to 7.1 GHz. The antenna exhibits circular polarization, a monopole like radiation pattern, and good gain over its operating bands, making it suitable for GSM, Extended UMTS, WiMAX, and Wi-Fi/WLAN applications. The antennas overall dimension is 27×25mm2.