Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 82 - 84 |
| Number of pages | 3 |
| Journal | IEEE Antennas and Wireless Propagation Letters |
| Volume | 4 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2005 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- antennas
- ground plane
- surface current
- antenna radiation patterns
- current density
- dipole antennas
- magnetic fields
- compound source
- groundplane current decay
- inverse distance square
- magnetic field
- small antenna element
- surface current density
- vertical-horizontal dipole
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Decay of groundplane currents of small antenna elements. / Sten, Johan; Hirvonen, Mervi.
In: IEEE Antennas and Wireless Propagation Letters, Vol. 4, No. 1, 2005, p. 82 - 84.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Decay of groundplane currents of small antenna elements
AU - Sten, Johan
AU - Hirvonen, Mervi
PY - 2005
Y1 - 2005
N2 - Expressions are derived for the surface current induced by vertical and horizontal dipoles on a nearby infinite groundplane. The expressions are obtained by means of the exact magnetic field. It is found that for a vertical dipole the surface current density decays roughly as the inverse of the distance from the source, while for a horizontal dipole it decays as the inverse distance squared. The result furnishes an explication for the empirical observation that antennas carrying mainly horizontal currents tend to be less sensitive to the dimensions of a finite groundplane than antennas carrying vertical currents. A formula is given by means of which the groundplane current of a compound source can be evaluated and controlled.
AB - Expressions are derived for the surface current induced by vertical and horizontal dipoles on a nearby infinite groundplane. The expressions are obtained by means of the exact magnetic field. It is found that for a vertical dipole the surface current density decays roughly as the inverse of the distance from the source, while for a horizontal dipole it decays as the inverse distance squared. The result furnishes an explication for the empirical observation that antennas carrying mainly horizontal currents tend to be less sensitive to the dimensions of a finite groundplane than antennas carrying vertical currents. A formula is given by means of which the groundplane current of a compound source can be evaluated and controlled.
KW - antennas
KW - ground plane
KW - surface current
KW - antenna radiation patterns
KW - current density
KW - dipole antennas
KW - magnetic fields
KW - compound source
KW - groundplane current decay
KW - inverse distance square
KW - magnetic field
KW - small antenna element
KW - surface current density
KW - vertical-horizontal dipole
U2 - 10.1109/LAWP.2005.844649
DO - 10.1109/LAWP.2005.844649
M3 - Article
VL - 4
SP - 82
EP - 84
JO - IEEE Antennas and Wireless Propagation Letters
JF - IEEE Antennas and Wireless Propagation Letters
SN - 1536-1225
IS - 1
ER -