Summary
International Symposium on Antennas and Propagation
2010
Session Number:4FB1
Session:
Number:4FB1-1
Reconfigurable beam steering 3D antenna for intelligent antenna system
Sang jun Ha, Chang won Jung, Yongjin Kim,
pp.-
Publication Date:2010/11/23
Online ISSN:2188-5079
Summary:
Intelligent antennas have recently received increasing interest due to the development and rapid spread of the complicated modern telecommunication services and electronic devices. Intelligent antenna design technologies include reconfigurable antenna radiation patterns, variable operating frequency ranges, and antenna isolation techniques between various antennas. Intelligent antenna systems are usually categorized as either switched-beam or adaptive-array systems. Both systems control their main antenna beam patterns in the general direction of the signal of interests with relatively large sizes and complicated control systems [1]. Also, the intelligent antenna systems are focusing on effective usages of the spatial dimension of antennas to increase the capacity of the wireless network by improving link quality [2] . In this paper, we propose a reconfigurable beam steering 3D antenna for intelligent antenna system. The proposed antennas are designed to small electronic devices which need intelligent antenna system in future ubiquitous society. The proposed antenna is combined structure of dipole and loop antenna. It is known that the combined antenna has a directive radiation characteristic when two antennas are excited properly [3]-[4]. The antenna structure is very simple 3D structure. The switches are inserted on the connection parts between dipole and loop antenna as shown in Fig.1. By changing on/off states of switches, the combined structures of two antennas are varied. This various antenna configurations can steer the radiation beam direction(θ and ψ). Simulation results confirmed the steering characteristics by using four imaginational switches. The proposed antenna can change the direction of the maximum gain in the x-y plane (0°, ±50°) and x-z plane (0°, ±50°). The proposed antenna operates in 2.6GHz ~ 2.65GHz (VSWR < 2). It was showed peak gain of the antenna is 1.94 ~ 2.48dBi.