Open AccessDecoupling using diamond‐shaped patterned ground resonator for small MIMO antennas
Author(s) -
Wu Di,
Cheung Sing Wai,
Li Qin Long,
Yuk Tung Ip
Publication year - 2017
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2016.0400
Subject(s) - mimo , printed circuit board , decoupling (probability) , resonator , electronic engineering , electrical engineering , physics , engineering , acoustics , channel (broadcasting) , control engineering
A decoupling technique using a patterned ground structure for small multiple‐input multiple‐output (MIMO) antennas is proposed in this study. The MIMO antenna consists of two symmetrical L‐shaped inverted‐F antenna (IFA) elements designed to operate in the wireless‐local‐area‐network band and installed on a compact printed‐circuit board (PCB) with a size of 72.4 × 20 mm 2 serving as ground. The two IFA elements have a very short separating distance of only 16.2 mm (0.13 λ ). To reduce strong mutual coupling, a diamond‐shaped patterned ground resonator (DSPGR) with a compact size of 16.2 × 10.13 mm 2 is printed on the PCB between the two IFA elements. The effect of the DSPGR on reducing mutual coupling is studied using computer simulation. The impedance bandwidth, mutual coupling, peak gain, radiation pattern and efficiency, envelope‐correlation coefficient and multiplexing efficiency of the MIMO antenna are studied using simulation and measurement. Results show that the DSPGR can dramatically reduce mutual coupling between the two IFA elements to below −20 dB within the operating frequency range of 2.18–2.65 GHz (19.5%).