MULTIBAND FREQUENCY RECONFIGURABLE 4G HANDSET ANTENNA WITH MIMO CAPABILITY | Zendy

Janne Ilvonen | Zendy; Risto Valkonen | Zendy; Jari Holopainen | Zendy; Ville Viikari | Zendy

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MULTIBAND FREQUENCY RECONFIGURABLE 4G HANDSET ANTENNA WITH MIMO CAPABILITY

Author(s) -

Janne Ilvonen,

Risto Valkonen,

Jari Holopainen,

Ville Viikari

Publication year - 2014

Publication title -

electromagnetic waves

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.437

H-Index - 89

eISSN - 1559-8985

pISSN - 1070-4698

DOI - 10.2528/pier14062703

Subject(s) - handset , reconfigurable antenna , mimo , antenna (radio) , electronic engineering , computer science , electrical engineering , telecommunications , engineering , omnidirectional antenna , antenna efficiency , beamforming

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 mm 3 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.

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