Title :
Radiation Properties Enhancement of a GSM/WLAN Microstrip Antenna Using a Dual Band Circularly Symmetric EBG Substrate
Author :
SalarRahimi, M. ; Rashed-Mohassel, Jalil ; Edalatipour, M.
Author_Institution :
Center of Excellence on Appl. Electromagn. Syst., Univ. of Tehran, Tehran, Iran
Abstract :
This communication presents a dual band circular patch antenna with improved radiation properties at GSM and WLAN frequency bands, i.e., 1.8 and 2.4 GHz. The improvement has been achieved using a dual band circularly symmetric EBG (CS-EBG) structure. The structure has been simulated, fabricated and measured demonstrating notable enhancement in antenna radiation patterns at both frequency bands. Results show 5 dB and 7 dB improvement in front to back ratio at design frequencies of 1.8 GHz and 2.4 GHz respectively. In addition, measurement results demonstrate 0.8 dB increase in antenna gain and significant reduction in cross polarization level at both frequency bands.
Keywords :
antenna radiation patterns; cellular radio; microstrip antennas; multifrequency antennas; wireless LAN; CS-EBG structure; GSM; WLAN; antenna gain; antenna radiation pattern; cross polarization level; dual band circular patch antenna; dual band circularly symmetric EBG substrate; frequency 1.8 GHz; frequency 2.4 GHz; microstrip antenna; radiation property enhancement; Antenna measurements; Dual band; Metamaterials; Microstrip; Microstrip antennas; Periodic structures; Circularly symmetric EBG; dual band; microstrip antennas; surface waves;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2012.2208442
