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Triple‐port, two‐mode based two element cylindrical dielectric resonator antenna for MIMO applications
Author(s) -
Das Gourab,
Sharma Anand,
Gangwar Ravi Kumar,
Sharawi Mohammad S.
Publication year - 2018
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.31202
Subject(s) - mimo , port (circuit theory) , dielectric resonator antenna , antenna (radio) , resonator , dielectric resonator , coaxial , acoustics , electrical engineering , electronic engineering , physics , telecommunications , engineering , optoelectronics , channel (broadcasting)
Abstract In this letter, a triple‐port multiple‐input–multiple‐output (MIMO) cylindrical dielectric resonator based antenna (cDRA) supporting 2 simultaneous operating modes is presented. The cDRAs are excited by 3 ports supporting MIMO operation. Mode‐1 is an array mode achieved by exciting the 2 element cDRA array via a simple combiner at port‐1. Ports‐ 2 and −3 support individual element excitation via coaxial probes for mode‐2 yielding individual element MIMO operation. The isolation between ports‐1, 2, and 3 is improved by generating orthogonal modes in the cDRA via proper excitation. The isolation between ports‐2 and 3 is improved by etching 2 C‐shaped defected ground structure slits. For all the cases, the isolation between the ports exceeds 20 dB over the operating band. The presented dual‐mode 3‐port MIMO antenna covers the bands between 5.15 and 6.0 GHz.