A compact four-port UWB MIMO antenna with connected ground and wide axial ratio bandwidth

Sachin Kumar; Gwan Hui Lee; Dong Hwi Kim; Wahab Mohyuddin; Hyun Chul Choi; Kang Wook Kim

doi:10.1017/S1759078719000874

A compact four-port UWB MIMO antenna with connected ground and wide axial ratio bandwidth

Sachin Kumar, Gwan Hui Lee, Dong Hwi Kim, Wahab Mohyuddin, Hyun Chul Choi, Kang Wook Kim

School of Electronics Engineering

Kyungpook National University

Research output: Contribution to journal › Article › peer-review

39 Scopus citations

Abstract

A new design method of an ultra-wideband circularly-polarized planar multiple-input-multiple-output (MIMO) antenna is presented in this paper. The proposed MIMO antenna consists of four unit cell antennas, being comprised of a microstrip feed line and a square slotted ground plane. In the proposed unit cell design, a circular stub is protruded from the ground plane strip for achieving circular polarization. The unit cell of the MIMO antenna is optimized by adjusting design parameters. The compact four-port MIMO antenna prototype is designed on the FR4 substrate with the overall dimensions of 45 × 45 × 1.6 mm³. The proposed four-port MIMO antenna design provides an impedance bandwidth (S11 < -10 dB) of 112% (3.1-11 GHz) and a 3 dB axial ratio bandwidth of 36% (4.8-6.9 GHz). The performance of the fabricated MIMO antenna shows good agreement between the EM simulation and measurement results.

Original language	English
Pages (from-to)	75-85
Number of pages	11
Journal	International Journal of Microwave and Wireless Technologies
Volume	12
Issue number	1
DOIs	https://doi.org/10.1017/S1759078719000874
State	Published - 1 Feb 2020

Keywords

Circularly-polarized
compact
isolation
MIMO
UWB

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10.1017/S1759078719000874

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title = "A compact four-port UWB MIMO antenna with connected ground and wide axial ratio bandwidth",

abstract = "A new design method of an ultra-wideband circularly-polarized planar multiple-input-multiple-output (MIMO) antenna is presented in this paper. The proposed MIMO antenna consists of four unit cell antennas, being comprised of a microstrip feed line and a square slotted ground plane. In the proposed unit cell design, a circular stub is protruded from the ground plane strip for achieving circular polarization. The unit cell of the MIMO antenna is optimized by adjusting design parameters. The compact four-port MIMO antenna prototype is designed on the FR4 substrate with the overall dimensions of 45 × 45 × 1.6 mm3. The proposed four-port MIMO antenna design provides an impedance bandwidth (S11 < -10 dB) of 112% (3.1-11 GHz) and a 3 dB axial ratio bandwidth of 36% (4.8-6.9 GHz). The performance of the fabricated MIMO antenna shows good agreement between the EM simulation and measurement results.",

keywords = "Circularly-polarized, compact, isolation, MIMO, UWB",

author = "Sachin Kumar and Lee, {Gwan Hui} and Kim, {Dong Hwi} and Wahab Mohyuddin and Choi, {Hyun Chul} and Kim, {Kang Wook}",

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AU - Kim, Dong Hwi

AU - Mohyuddin, Wahab

AU - Choi, Hyun Chul

AU - Kim, Kang Wook

PY - 2020/2/1

Y1 - 2020/2/1

N2 - A new design method of an ultra-wideband circularly-polarized planar multiple-input-multiple-output (MIMO) antenna is presented in this paper. The proposed MIMO antenna consists of four unit cell antennas, being comprised of a microstrip feed line and a square slotted ground plane. In the proposed unit cell design, a circular stub is protruded from the ground plane strip for achieving circular polarization. The unit cell of the MIMO antenna is optimized by adjusting design parameters. The compact four-port MIMO antenna prototype is designed on the FR4 substrate with the overall dimensions of 45 × 45 × 1.6 mm3. The proposed four-port MIMO antenna design provides an impedance bandwidth (S11 < -10 dB) of 112% (3.1-11 GHz) and a 3 dB axial ratio bandwidth of 36% (4.8-6.9 GHz). The performance of the fabricated MIMO antenna shows good agreement between the EM simulation and measurement results.

AB - A new design method of an ultra-wideband circularly-polarized planar multiple-input-multiple-output (MIMO) antenna is presented in this paper. The proposed MIMO antenna consists of four unit cell antennas, being comprised of a microstrip feed line and a square slotted ground plane. In the proposed unit cell design, a circular stub is protruded from the ground plane strip for achieving circular polarization. The unit cell of the MIMO antenna is optimized by adjusting design parameters. The compact four-port MIMO antenna prototype is designed on the FR4 substrate with the overall dimensions of 45 × 45 × 1.6 mm3. The proposed four-port MIMO antenna design provides an impedance bandwidth (S11 < -10 dB) of 112% (3.1-11 GHz) and a 3 dB axial ratio bandwidth of 36% (4.8-6.9 GHz). The performance of the fabricated MIMO antenna shows good agreement between the EM simulation and measurement results.

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KW - isolation

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A compact four-port UWB MIMO antenna with connected ground and wide axial ratio bandwidth

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