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http://dx.doi.org/10.5515/KJKIEES.2012.23.10.1137

Design of SPA Antenna Using FET Switch for 2.6 GHz  

Kang, Hyun-Sang (College of Information & Communication Engineering, SungKyunKwan University)
Park, Young-Il (College of Information & Communication Engineering, SungKyunKwan University)
Yong, Hwan-Gu (College of Information & Communication Engineering, SungKyunKwan University)
Kim, Byung-Sung (College of Information & Communication Engineering, SungKyunKwan University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.23, no.10, 2012 , pp. 1137-1144 More about this Journal
Abstract
In this paper, a 2.6 GHz switched parasitic array(SPA) antenna is designed to resolve the device interference in the femtocell. The designed SPA antenna structure consists of a central ${\lambda}/4$ monopole antenna as a radiator and surrounding four parasitic elements operating as a reflector or a director depending on the switching state. In addition, open state monopoles around the parasitic elements are placed to improve the directivity. The designed antenna utilizes RF FETs as switching elements instead of conventional PIN diodes, which enables beam steering with a simple structure consuming low power. To select the proper FET switch, the performance of the SPA antenna depending on the switch characteristics is analyzed. The fabricated antenna has 65 mm radius and 35 mm height, which shows about 15 dB front-back-ratio(FBR) at 2.6 GHz and enables eight-directional beam steering.
Keywords
Switched Parasitic Array Antenna(SPA); Smart Antenna; Beam Steering; FET Switch;
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