Physical bounds and radiation modes for MIMO antennas
(2020) In IEEE Transactions on Antennas and Propagation 68(6). p.4302-4311- Abstract
Modern antenna design for communication systems revolves around two extremes: devices, where only a small region is dedicated to antenna design, and base stations, where design space is not shared with other components. Both imply different restrictions on what performance is realizable. In this paper a computationally efficient method for calculating the fundamental performance bound on spectral efficiency is presented. The performance bound is calculated for MIMO antennas with a radiation efficiency requirement. A convex optimization problem is formulated in the current density of the antenna, this problem is solved by constructing its dual problem. The solution to this problem is based on a set of modes known as the radiation modes.... (More)
Modern antenna design for communication systems revolves around two extremes: devices, where only a small region is dedicated to antenna design, and base stations, where design space is not shared with other components. Both imply different restrictions on what performance is realizable. In this paper a computationally efficient method for calculating the fundamental performance bound on spectral efficiency is presented. The performance bound is calculated for MIMO antennas with a radiation efficiency requirement. A convex optimization problem is formulated in the current density of the antenna, this problem is solved by constructing its dual problem. The solution to this problem is based on a set of modes known as the radiation modes. This paper shows how to perform modal analysis using these modes to evaluate design strategies for maximal spectral efficiency. This is illustrated both for electrically small, and large, structures. For electrically small structures, sub regions for antenna design are evaluated and analyzed. These are compared to N-degree MIMO systems. For electrically large structures the degrees of freedom per unit area of different shapes are analyzed using radiation modes.
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- author
- Ehrenborg, Casimir LU and Gustafsson, Mats LU
- organization
- publishing date
- 2020-06
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Convex functions, Convex optimization, MIMO, MIMO communication, Modes, Optimization, Performance evaluation, Physical bounds, Receiving antennas, Transmitting antennas
- in
- IEEE Transactions on Antennas and Propagation
- volume
- 68
- issue
- 6
- pages
- 10 pages
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- external identifiers
-
- scopus:85079629060
- ISSN
- 0018-926X
- DOI
- 10.1109/TAP.2020.2972398
- language
- English
- LU publication?
- yes
- id
- 96a00f71-071e-4225-ad36-7414bea0d144
- date added to LUP
- 2020-03-05 11:22:35
- date last changed
- 2022-04-18 20:52:43
@article{96a00f71-071e-4225-ad36-7414bea0d144, abstract = {{<p>Modern antenna design for communication systems revolves around two extremes: devices, where only a small region is dedicated to antenna design, and base stations, where design space is not shared with other components. Both imply different restrictions on what performance is realizable. In this paper a computationally efficient method for calculating the fundamental performance bound on spectral efficiency is presented. The performance bound is calculated for MIMO antennas with a radiation efficiency requirement. A convex optimization problem is formulated in the current density of the antenna, this problem is solved by constructing its dual problem. The solution to this problem is based on a set of modes known as the radiation modes. This paper shows how to perform modal analysis using these modes to evaluate design strategies for maximal spectral efficiency. This is illustrated both for electrically small, and large, structures. For electrically small structures, sub regions for antenna design are evaluated and analyzed. These are compared to N-degree MIMO systems. For electrically large structures the degrees of freedom per unit area of different shapes are analyzed using radiation modes.</p>}}, author = {{Ehrenborg, Casimir and Gustafsson, Mats}}, issn = {{0018-926X}}, keywords = {{Convex functions; Convex optimization; MIMO; MIMO communication; Modes; Optimization; Performance evaluation; Physical bounds; Receiving antennas; Transmitting antennas}}, language = {{eng}}, number = {{6}}, pages = {{4302--4311}}, publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}}, series = {{IEEE Transactions on Antennas and Propagation}}, title = {{Physical bounds and radiation modes for MIMO antennas}}, url = {{http://dx.doi.org/10.1109/TAP.2020.2972398}}, doi = {{10.1109/TAP.2020.2972398}}, volume = {{68}}, year = {{2020}}, }