Low-profile two-port MIMO terminal antenna for low LTE bands with wideband multimodal excitation
Aliakbari Abar, Hanieh LU
and Lau, Buon Kiong
LU
(2020)
In IEEE Open Journal on Antennas and Propagation
1.
p.368-378
- Abstract
- Multiple-input multiple-output (MIMO) is a key enabler for high data rates in mobile communications. However, it is challenging to design MIMO terminal antennas for LTE bands below 1 GHz, due to the conventional chassis offering only one resonant characteristic mode (CM). Recently, it was shown that minor structural changes can yield up to two additional resonant modes for designing two-port MIMO antennas. Nonetheless, the resulting bandwidth for the second port is relatively small. To simultaneously meet bandwidth and other practical requirements (including low profile and no off-ground clearance), a step-by-step approach for structural changes and feed design is applied in this work to exemplify the use of physical insights from CM... (More)
- Multiple-input multiple-output (MIMO) is a key enabler for high data rates in mobile communications. However, it is challenging to design MIMO terminal antennas for LTE bands below 1 GHz, due to the conventional chassis offering only one resonant characteristic mode (CM). Recently, it was shown that minor structural changes can yield up to two additional resonant modes for designing two-port MIMO antennas. Nonetheless, the resulting bandwidth for the second port is relatively small. To simultaneously meet bandwidth and other practical requirements (including low profile and no off-ground clearance), a step-by-step approach for structural changes and feed design is applied in this work to exemplify the use of physical insights from CM analysis to achieve a competitive wideband two-port solution. The main novelty is that an entirely new mode is identified and appropriately tuned by structural modification for creating an additional resonance below 1 GHz. Moreover, two simple probe-feed ports are designed to jointly excite different subsets of four modes over frequency. In addition, far-field pattern orthogonality is guaranteed by the different phase shifts of the characteristic electric fields at the port locations. Furthermore, bulkier self-resonant antenna elements are avoided. To show design flexibility, a three-port version is also demonstrated. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/22a359cf-4269-4153-b684-8154da83fe49
- author
- Aliakbari Abar, Hanieh
LU
and Lau, Buon Kiong
LU
- organization
- publishing date
- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- MIMO systems, characteristic modes, correlation coefficient, wideband antennas, terminal antennas
- in
- IEEE Open Journal on Antennas and Propagation
- volume
- 1
- pages
- 368 - 378
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- external identifiers
-
- scopus:85112066585
- ISSN
- 2637-6431
- DOI
- 10.1109/OJAP.2020.3010916
- project
- EIT_Optantsys Novel Antenna System Design Paradigm for High Performance Mobile Communications
- Optimal MIMO Terminal Antennas for 5G and Beyond
- language
- English
- LU publication?
- yes
- id
- 22a359cf-4269-4153-b684-8154da83fe49
- date added to LUP
- 2020-07-23 11:32:12
- date last changed
- 2024-03-04 23:42:28
@article{22a359cf-4269-4153-b684-8154da83fe49,
abstract = {{Multiple-input multiple-output (MIMO) is a key enabler for high data rates in mobile communications. However, it is challenging to design MIMO terminal antennas for LTE bands below 1 GHz, due to the conventional chassis offering only one resonant characteristic mode (CM). Recently, it was shown that minor structural changes can yield up to two additional resonant modes for designing two-port MIMO antennas. Nonetheless, the resulting bandwidth for the second port is relatively small. To simultaneously meet bandwidth and other practical requirements (including low profile and no off-ground clearance), a step-by-step approach for structural changes and feed design is applied in this work to exemplify the use of physical insights from CM analysis to achieve a competitive wideband two-port solution. The main novelty is that an entirely new mode is identified and appropriately tuned by structural modification for creating an additional resonance below 1 GHz. Moreover, two simple probe-feed ports are designed to jointly excite different subsets of four modes over frequency. In addition, far-field pattern orthogonality is guaranteed by the different phase shifts of the characteristic electric fields at the port locations. Furthermore, bulkier self-resonant antenna elements are avoided. To show design flexibility, a three-port version is also demonstrated.}},
author = {{Aliakbari Abar, Hanieh and Lau, Buon Kiong}},
issn = {{2637-6431}},
keywords = {{MIMO systems; characteristic modes; correlation coefficient; wideband antennas; terminal antennas}},
language = {{eng}},
pages = {{368--378}},
publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
series = {{IEEE Open Journal on Antennas and Propagation}},
title = {{Low-profile two-port MIMO terminal antenna for low LTE bands with wideband multimodal excitation}},
url = {{https://lup.lub.lu.se/search/files/82410181/Main_File_Hanieh_Aliakbari_v6_unmarked.pdf}},
doi = {{10.1109/OJAP.2020.3010916}},
volume = {{1}},
year = {{2020}},
}