NDLI: Emerging reconfigurable antenna elements for broadband wireless communication systems

Content Provider	IEEE Xplore Digital Library
Author	Wei Lin Hang Wong Jun Xiang
Copyright Year	2015
Description	Author affiliation: Dept. of Electron. Eng., City Univ. of Hong Kong, Hong Kong, China (Wei Lin; Hang Wong) \|\| Shenzhen Key Lab. of MWWC, City Univ. of Hong Kong Shenzhen Res. Inst., Shenzhen, China (Jun Xiang)
Abstract	This paper introduces several emerging reconfigurable antenna elements for modern broadband wireless communication systems. Firstly, we will present a broadband uni-directional circular polarization (CP) reconfigurable antenna consisting of four planar monopole radiators and an broadband output phase reconfigurable feeding network. Switchable left-handed circular polarization (LHCP) and right-handed circular polarization (RHCP) are realized by controlling the rotating direction of the currents $(J_{m1},$ $J_{m2},$ $J_{m3}$ and $J_{m4})$ on the four monopoles. Secondly, beside of realizing the polarization switching of uni-directional radiation pattern, we designed a broadband omni-directional CP reconfigurable antenna with a conical-beam pattern. The idea is to combine a broadband center-fed monopolar patch working as an electric dipole (E-dipole) and eight reconfigurable coupling loop stub radiators as the magnetic dipoles (M-dipole) together to generate the reconfigurable CP conical-beam radiation. Above two designs have the polarization reconfigurable characteristics. In addition, we also realized a broadband pattern reconfigurable CP antenna by exciting a quadrifilar helical antenna (QHA) with the same reconfigurable feeding network as in the first design. Broadside and backfire CP radiation patterns are switchable by controlling the output phases of the four excitations. These proposed antennas are good candidate for many modern wireless communication systems as navigation and geostationary satellite systems, RFID, or other systems requiring CP radiations.
Starting Page	1
Ending Page	6
File Size	2153914
Page Count	6
File Format	PDF
ISBN	9781479986392
ISSN	21593450
e-ISBN	9781479986415
DOI	10.1109/TENCON.2015.7372928
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-11-01
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Broadband antennas Antenna radiation patterns Bandwidth Broadband communication Switches Antenna measurements Antenna feeds conical-beam reconfigurable antennas broadband broadside pattern backfire pattern
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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