Title :
A Broadband and Electrically Small Planar Monopole Employing Metamaterial Transmission Line
Author :
Liang-Yuan Liu ; Bing-Zhong Wang
Author_Institution :
Inst. of Appl. Phys., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
A broadband and electrically small planar monopole is presented in this letter. In order to increase the impedance bandwidth, a metal patch embedded with two epsilon-negative meander lines is used as the main radiator and the ground plane is periodically etched with cross slots. The etched ground and the patch form a metamaterial transmission line (MTL) resonance, which not only miniaturizes the antenna but also improves its bandwidth. The proposed antenna can work in the frequency band of 2.38-2.95 GHz with a fractional bandwidth as much as 21.5%. The size of the main radiator is 0.078λ0 ×0.073λ0 and the maximum gain is 3.42 dBi. The antenna can be applied to various wireless mobile communication systems such as RFID, WLAN, and WiFi.
Keywords :
antenna radiation patterns; broadband antennas; metamaterial antennas; microwave antennas; microwave resonators; monopole antennas; planar antennas; telecommunication transmission lines; MTL resonance; antenna radiator; broadband antenna; electrically small planar monopole antenna; epsilon-negative meander line; frequency 2.38 GHz to 295 GHz; metal patch; metamaterial transmission line; wireless mobile communication system; Antenna measurements; Bandwidth; Broadband antennas; Impedance; Metamaterials; Resonant frequency; Broadband; electrically small antenna; metamaterial transmission line; planar monopole;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2015.2388762
