Title :
A novel antenna beam switching technique on mobile devices for MIMO applications
Author :
Jui-Hung Chen ; Ta-Chun Pu ; Chun-Yih Wu ; Hung-Hsuan Lin
Author_Institution :
ITRI, Hsinchu, Taiwan
Abstract :
In this article we will introduce an antenna structure with reconfigurable pattern, which comprising an active antenna and current draggers. We treat the antenna ground as a part of the radiator. Therefore, controlling the Rf current on antenna ground can manipulate the radiation pattern of the antenna. The current dragger, which intrinsically is a kind of pseudo antenna or a low-Q resonator, is installed on the antenna ground. With a controller and switches, we can change the rf current distribution by enabling or disabling the current draggers. It was confirmed that by changing the control current to the switches, the main beam direction of the antenna can be switched in the azimuthal plane. The antenna was fabricated and measured and the results for the return losses show reasonable agreement.
Keywords :
MIMO communication; active antennas; antenna radiation patterns; mobile radio; resonators; MIMO application; active antenna; antenna beam direction; antenna beam switching; antenna fabrication; antenna ground; antenna radiation pattern; antenna structure; azimuthal plane; current distribution; current dragger; low-Q resonator; mobile device; pseudoantenna; reconfigurable pattern; Antenna measurements; Antenna radiation patterns; MIMO; PIN photodiodes; Radio frequency; Switches; RF current dragger; Reconfigurable; Smart antenna; Switchable;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2012 Asia-Pacific
Conference_Location :
Kaohsiung
Print_ISBN :
978-1-4577-1330-9
Electronic_ISBN :
978-1-4577-1331-6
DOI :
10.1109/APMC.2012.6421830
