Application of gain-bandwidth bounds on loaded dipoles
Derneryd, Anders LU ; Gustafsson, Mats LU
; Kristensson, Gerhard
LU
and Sohl, Christian
LU
(2009)
In IET Microwaves, Antennas & Propagation
3(6).
p.959-966
- Abstract
- Physical limitations based only on antenna volume, form factor and material parameters are applied to electrically small antennas in the form of single dipoles. The upper bound on the gain-bandwidth product is solely determined by the polarisability matrix that characterises the antenna when it is immersed in a uniform applied static field. The polarisability, and hence the bandwidth, is increased by loading the dipole arms close to their ends. The half-power impedance bandwidth is increased from 5 to 13% by moving the coils from the centre to the ends of the dipole arms. The introduction of a stub-matching further improves the bandwidth but the physical limit is not reached. Finally, a dual-resonance dipole antenna is analysed. It is... (More)
- Physical limitations based only on antenna volume, form factor and material parameters are applied to electrically small antennas in the form of single dipoles. The upper bound on the gain-bandwidth product is solely determined by the polarisability matrix that characterises the antenna when it is immersed in a uniform applied static field. The polarisability, and hence the bandwidth, is increased by loading the dipole arms close to their ends. The half-power impedance bandwidth is increased from 5 to 13% by moving the coils from the centre to the ends of the dipole arms. The introduction of a stub-matching further improves the bandwidth but the physical limit is not reached. Finally, a dual-resonance dipole antenna is analysed. It is observed that a second resonance hardly reduces the bandwidth of the first resonance if the resonances are separated more than 1.7 times in frequency. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1174671
- author
- Derneryd, Anders
LU
; Gustafsson, Mats
LU
; Kristensson, Gerhard
LU
and Sohl, Christian
LU
- organization
- publishing date
- 2009
- type
- Contribution to journal
- publication status
- published
- subject
- in
- IET Microwaves, Antennas & Propagation
- volume
- 3
- issue
- 6
- pages
- 959 - 966
- publisher
- Institution of Engineering and Technology
- external identifiers
-
- wos:000269621000008
- scopus:68949101523
- ISSN
- 1751-8725
- DOI
- 10.1049/iet-map.2008.0251
- language
- English
- LU publication?
- yes
- id
- 8d6fe33f-b0bb-4a19-b2fd-59c243cdf312 (old id 1174671)
- date added to LUP
- 2016-04-04 07:20:32
- date last changed
- 2022-01-29 02:05:47
@article{8d6fe33f-b0bb-4a19-b2fd-59c243cdf312,
abstract = {{Physical limitations based only on antenna volume, form factor and material parameters are applied to electrically small antennas in the form of single dipoles. The upper bound on the gain-bandwidth product is solely determined by the polarisability matrix that characterises the antenna when it is immersed in a uniform applied static field. The polarisability, and hence the bandwidth, is increased by loading the dipole arms close to their ends. The half-power impedance bandwidth is increased from 5 to 13% by moving the coils from the centre to the ends of the dipole arms. The introduction of a stub-matching further improves the bandwidth but the physical limit is not reached. Finally, a dual-resonance dipole antenna is analysed. It is observed that a second resonance hardly reduces the bandwidth of the first resonance if the resonances are separated more than 1.7 times in frequency.}},
author = {{Derneryd, Anders and Gustafsson, Mats and Kristensson, Gerhard and Sohl, Christian}},
issn = {{1751-8725}},
language = {{eng}},
number = {{6}},
pages = {{959--966}},
publisher = {{Institution of Engineering and Technology}},
series = {{IET Microwaves, Antennas & Propagation}},
title = {{Application of gain-bandwidth bounds on loaded dipoles}},
url = {{http://dx.doi.org/10.1049/iet-map.2008.0251}},
doi = {{10.1049/iet-map.2008.0251}},
volume = {{3}},
year = {{2009}},
}