Title :
Broadband Antenna Employing Simplified MTLs for WLAN/WiMAX Applications
Author :
Cheng Zhou ; Guangming Wang ; Jiangang Liang ; Yawei Wang ; Binfeng Zong
Author_Institution :
Lab. of Microwave Technol. & Applic., Air Force Eng. Univ., Xi´an, China
Abstract :
A broadband electrically small antenna (ESA) based on simplified metamaterial transmission lines (SMTLs) is proposed in this letter. The antenna consists of two different-sized SMTL unit cells of different resonance frequencies. A dispersion analysis of the SMTL reveals that an increase in series of the interdigital capacitance would decrease the +1st-order mode resonance frequency, thus reducing the electrical size of the proposed antenna. A matching wideband antenna is enabled when the two resonance frequencies suitably merge. A fabricated prototype for WLAN/WiMAX applications has been designed and presented. The prototype measurements are 49.6% for bandwidth (10 dB) and 96.5% for radiation efficiency. Simulation and experimental results are used to verify the theoretical prediction.
Keywords :
WiMax; broadband antennas; capacitance; electromagnetic metamaterials; resonance; transmission lines; wireless LAN; 1st-order mode resonance frequency; ESA; MTL; SMTL unit cells; WLAN-WiMAX application; broadband electrically small antenna; dispersion analysis; interdigital capacitance; matching wideband antenna; simplified metamaterial transmission lines; Antenna measurements; Bandwidth; Broadband antennas; Metamaterials; Resonant frequency; Wireless LAN; Broadband; WLAN/WiMAX; electrically small antenna (ESA); metamaterial transmission line (MTL);
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2313128
