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PIER PIER B PIER C PIER M PIER Letters
2014-08-20
Multiband Frequency Reconfigurable 4G Handset Antenna with MIMO Capability
By
Janne Ilvonen,

    Dr. Janne Ilvonen

    Department of Radio Science and Engineering, School of Electrical Engineering

    Aalto University

    Finland

    Homepage

Risto Valkonen,

    Dr. Risto Valkonen

    Institute of Electrical and Information Engineering, Chair of Wireless Communications

    University of Kiel

    Germany

    Homepage

Jari Holopainen,

    Dr. Jari Holopainen

    TKK Helsinki Univ Technol

    Finland

    Homepage

Ville Viikari

    Dr. Ville Viikari

    Helsinki Univ Technol

    Finland

    Homepage

Progress In Electromagnetics Research, Vol. 148, 233-243, 2014
doi:10.2528/PIER14062703
Abstract
A novel frequency reconfigurable 4G Multiple-Input Multiple-Output (MIMO) handset antenna is presented and verified with experimental results. Frequency tuning is used to minimize the antenna volume and to compensate for the losses related to user-originated impedance detuning. Both antenna elements are independently frequency reconfigurable and can cover most of the LTE-A bands. The study compares the losses of CMOS- and MEMS-based digitally tunable capacitors (DTC). In addition, two prototypes with total antenna volumes of 1170 and 3900 mm3 have been studied. The results show that the larger antenna structure operates with an efficiency better than 49% across the frequencies of 698-960 MHz and better than 56% across the frequencies of 1430-2690 MHz, when a MEMS-based DTC is used. In addition, a new method is introduced to estimate the suitability of the antenna geometry for frequency tunable antennas.
Citation
Janne Ilvonen, Risto Valkonen, Jari Holopainen, and Ville Viikari, "Multiband Frequency Reconfigurable 4G Handset Antenna with MIMO Capability," Progress In Electromagnetics Research, Vol. 148, 233-243, 2014.
doi:10.2528/PIER14062703
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