Designing and feeding multiple characteristic modes in small terminals at frequencies below 1 GHz
(2013) 8th COST IC1004 Management Committee Meeting- Abstract
- Designing multiple antennas in small terminals at frequency bands below 1 GHz is challenging due to severe mutual coupling among antenna elements. The severe coupling is often the result of simultaneous excitation of the fundamental characteristic mode of the terminal chassis by more than one antenna element. In this work, through the use of characteristic mode analysis, we propose to solve the coupling problem in a two-step procedure. First, by manipulating the chassis structure it is possible to create more than one characteristic mode which resonate at frequencies below 1 GHz. Second, proper feeding of individual modes is required as not to excite both modes through a single feed. By exploiting characteristic field properties, single... (More)
- Designing multiple antennas in small terminals at frequency bands below 1 GHz is challenging due to severe mutual coupling among antenna elements. The severe coupling is often the result of simultaneous excitation of the fundamental characteristic mode of the terminal chassis by more than one antenna element. In this work, through the use of characteristic mode analysis, we propose to solve the coupling problem in a two-step procedure. First, by manipulating the chassis structure it is possible to create more than one characteristic mode which resonate at frequencies below 1 GHz. Second, proper feeding of individual modes is required as not to excite both modes through a single feed. By exploiting characteristic field properties, single mode feeds can be achieved. To demonstrate our design concept and its practicality, we show the opportunistic use of the metallic bezel popular in smartphone designs. In this design we effectively obtain two characteristic modes that are efficiently excited by separate coupling elements at 0.81 GHz. Due to the inherent orthogonality of the modes, proper excitation of these modes by two antenna elements will result in orthogonal radiation patterns and high isolation between the antenna ports. Therefore, the proposed approach enables the effective use of the chassis to achieve MIMO antennas with good performance. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3245335b-4da6-4fb1-be45-9a4b9c9f5ba3
- author
- Miers, Zachary LU ; Li, Hui LU and Lau, Buon Kiong LU
- organization
- publishing date
- 2013-09-25
- type
- Contribution to conference
- publication status
- published
- subject
- conference name
- 8th COST IC1004 Management Committee Meeting
- conference location
- Hed-Pand, Belgium
- conference dates
- 2013-09-26 - 2013-09-27
- project
- Systematic Antenna Design Using the Theory of Characteristic Modes
- language
- English
- LU publication?
- yes
- id
- 3245335b-4da6-4fb1-be45-9a4b9c9f5ba3
- date added to LUP
- 2016-04-14 17:56:11
- date last changed
- 2019-04-30 18:10:29
@misc{3245335b-4da6-4fb1-be45-9a4b9c9f5ba3,
abstract = {{Designing multiple antennas in small terminals at frequency bands below 1 GHz is challenging due to severe mutual coupling among antenna elements. The severe coupling is often the result of simultaneous excitation of the fundamental characteristic mode of the terminal chassis by more than one antenna element. In this work, through the use of characteristic mode analysis, we propose to solve the coupling problem in a two-step procedure. First, by manipulating the chassis structure it is possible to create more than one characteristic mode which resonate at frequencies below 1 GHz. Second, proper feeding of individual modes is required as not to excite both modes through a single feed. By exploiting characteristic field properties, single mode feeds can be achieved. To demonstrate our design concept and its practicality, we show the opportunistic use of the metallic bezel popular in smartphone designs. In this design we effectively obtain two characteristic modes that are efficiently excited by separate coupling elements at 0.81 GHz. Due to the inherent orthogonality of the modes, proper excitation of these modes by two antenna elements will result in orthogonal radiation patterns and high isolation between the antenna ports. Therefore, the proposed approach enables the effective use of the chassis to achieve MIMO antennas with good performance.}},
author = {{Miers, Zachary and Li, Hui and Lau, Buon Kiong}},
language = {{eng}},
month = {{09}},
title = {{Designing and feeding multiple characteristic modes in small terminals at frequencies below 1 GHz}},
year = {{2013}},
}