A Dual-Port MIMO Antenna Decoupling by Common and Differential Mode Cancellation with High Isolation

Guo Ping Gao; Jin Ming Bai; Li Jun Jin; Wen Di Guo; Ge Ma; Bin Hu

doi:10.1109/LAWP.2025.3545945

A Dual-Port MIMO Antenna Decoupling by Common and Differential Mode Cancellation with High Isolation

Guo Ping Gao, Jin Ming Bai, Li Jun Jin, Wen Di Guo, Ge Ma, Bin Hu^*

^*Corresponding author for this work

Lanzhou University

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

Abstract

In this letter, a dual-port Multiple-input multiple-output (MIMO) antenna decoupling by common mode (CM) and differential mode (DM) cancellation with high isolation is proposed. The basic structure of the antenna features a large rectangular slot in the center of the circular patch, along with shorting pins and other decoupling structures to achieve high isolation. The shorting pins arranged on the perfect magnetic conductor (PMC) and the metallic strips passing through the perfect electrical conductor (PEC) can adjust the impedance matching for CM and DM feeding, fulfilling the basic principles for decoupling by CM and DM cancellation. The measured impedance bandwidth reaches 85 MHz (from 3.49 GHz to 3.575 GHz), while the isolation exceeds 25 dB. Analysis of the radiation patterns shows that pattern diversity is achieved between the dual ports of the antenna. The proposed antenna achieved polarized direction matching while maintaining a lower profile and smaller size, these characteristics makes it more suitable for wearable applications.

Original language	English
Journal	IEEE Antennas and Wireless Propagation Letters
DOIs	https://doi.org/10.1109/LAWP.2025.3545945
Publication status	Accepted/In press - 2025
Externally published	Yes

Keywords

High isolation
Low profile
MIMO
Pattern diversity
Wearable application

Access to Document

10.1109/LAWP.2025.3545945

Cite this

@article{876e918c176d4a188902f95e96105cab,

title = "A Dual-Port MIMO Antenna Decoupling by Common and Differential Mode Cancellation with High Isolation",

abstract = "In this letter, a dual-port Multiple-input multiple-output (MIMO) antenna decoupling by common mode (CM) and differential mode (DM) cancellation with high isolation is proposed. The basic structure of the antenna features a large rectangular slot in the center of the circular patch, along with shorting pins and other decoupling structures to achieve high isolation. The shorting pins arranged on the perfect magnetic conductor (PMC) and the metallic strips passing through the perfect electrical conductor (PEC) can adjust the impedance matching for CM and DM feeding, fulfilling the basic principles for decoupling by CM and DM cancellation. The measured impedance bandwidth reaches 85 MHz (from 3.49 GHz to 3.575 GHz), while the isolation exceeds 25 dB. Analysis of the radiation patterns shows that pattern diversity is achieved between the dual ports of the antenna. The proposed antenna achieved polarized direction matching while maintaining a lower profile and smaller size, these characteristics makes it more suitable for wearable applications.",

keywords = "High isolation, Low profile, MIMO, Pattern diversity, Wearable application",

author = "Gao, {Guo Ping} and Bai, {Jin Ming} and Jin, {Li Jun} and Guo, {Wen Di} and Ge Ma and Bin Hu",

note = "Publisher Copyright: {\textcopyright} 2002-2011 IEEE.",

year = "2025",

doi = "10.1109/LAWP.2025.3545945",

language = "English",

journal = "IEEE Antennas and Wireless Propagation Letters",

issn = "1536-1225",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

}

TY - JOUR

T1 - A Dual-Port MIMO Antenna Decoupling by Common and Differential Mode Cancellation with High Isolation

AU - Gao, Guo Ping

AU - Bai, Jin Ming

AU - Jin, Li Jun

AU - Guo, Wen Di

AU - Ma, Ge

AU - Hu, Bin

PY - 2025

Y1 - 2025

N2 - In this letter, a dual-port Multiple-input multiple-output (MIMO) antenna decoupling by common mode (CM) and differential mode (DM) cancellation with high isolation is proposed. The basic structure of the antenna features a large rectangular slot in the center of the circular patch, along with shorting pins and other decoupling structures to achieve high isolation. The shorting pins arranged on the perfect magnetic conductor (PMC) and the metallic strips passing through the perfect electrical conductor (PEC) can adjust the impedance matching for CM and DM feeding, fulfilling the basic principles for decoupling by CM and DM cancellation. The measured impedance bandwidth reaches 85 MHz (from 3.49 GHz to 3.575 GHz), while the isolation exceeds 25 dB. Analysis of the radiation patterns shows that pattern diversity is achieved between the dual ports of the antenna. The proposed antenna achieved polarized direction matching while maintaining a lower profile and smaller size, these characteristics makes it more suitable for wearable applications.

AB - In this letter, a dual-port Multiple-input multiple-output (MIMO) antenna decoupling by common mode (CM) and differential mode (DM) cancellation with high isolation is proposed. The basic structure of the antenna features a large rectangular slot in the center of the circular patch, along with shorting pins and other decoupling structures to achieve high isolation. The shorting pins arranged on the perfect magnetic conductor (PMC) and the metallic strips passing through the perfect electrical conductor (PEC) can adjust the impedance matching for CM and DM feeding, fulfilling the basic principles for decoupling by CM and DM cancellation. The measured impedance bandwidth reaches 85 MHz (from 3.49 GHz to 3.575 GHz), while the isolation exceeds 25 dB. Analysis of the radiation patterns shows that pattern diversity is achieved between the dual ports of the antenna. The proposed antenna achieved polarized direction matching while maintaining a lower profile and smaller size, these characteristics makes it more suitable for wearable applications.

KW - High isolation

KW - Low profile

KW - MIMO

KW - Pattern diversity

KW - Wearable application

UR - http://www.scopus.com/inward/record.url?scp=85218962524&partnerID=8YFLogxK

U2 - 10.1109/LAWP.2025.3545945

DO - 10.1109/LAWP.2025.3545945

M3 - Article

AN - SCOPUS:85218962524

SN - 1536-1225

JO - IEEE Antennas and Wireless Propagation Letters

JF - IEEE Antennas and Wireless Propagation Letters

ER -

A Dual-Port MIMO Antenna Decoupling by Common and Differential Mode Cancellation with High Isolation

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this