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http://dx.doi.org/10.5515/KJKIEES.2013.24.12.1113

Design of a MIMO Antenna Using a RF MEMS Element  

Lee, Won-Woo (Department of Electronic & Computer Engineering, Hanyang University)
Rhee, Byung-Ho (Department of Electronic & Computer Engineering, Hanyang University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.24, no.12, 2013 , pp. 1113-1119 More about this Journal
Abstract
In this letter, a new approach is proposed for the design of a multi antenna for MIMO wireless devices. The proposed antenna covers various LTE(Long Term Evolution) service bands: band 17(704~746 MHz), band 13(746~787 MHz), band 5(824~894 MHz), and band 8(880~960 MHz). The proposed main antenna consists of a conventional monopole antenna with an inverted L-shaped slit for wideband operation. The proposed the LTE sub antenna is based on a switch loaded loop antenna structure, with a resonance frequency that can be controlled by capacitance of a logic circuit. The tuning technique for the LTE Rx antenna uses a RF MEMS(Micro-Electro mechanical system) to match the impedances to realize the bands of interest. Because the two proposed antennas are polarized orthogonally to each other, the ECC(Envelope Correlation Coefficient) characteristic between two antennas was measured to be very low (below 0.06) with an isolation characteristic below -20 dB between the two antennas in the operating overall LTE bands. The proposed antenna is particularly attractive for mobile devices that integrate LTE multiple systems.
Keywords
Antenna; ECC; LTE; MIMO; RF MEMS;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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