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

Volume

14

fYear

2015

fDate

2015

Firstpage

1018

Lastpage

1021

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;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2015.2388762

Filename

7004041