Abstract
The numerical electromagnetics code (NEC) was used to evaluate the admittance, the average power gain, and the electric near and far fields of a monopole antenna (λ/5) mounted on a cubical box (λ/3 per side) over a perfectly conducting ground plane. Two models of the box, using surface patches and wire grids, were evaluated. The monopole was positioned at the center, the edge, and at a corner of the box top surface. NEC results were examined and compared with experimental data and with results from 'PATCH' another independent electromagnetic modeling code. Contour and three-dimensional amplitude and phase plots of the near electric fields are presented. Radiation patterns were calculated to relate far-field and near-field behavior of the antenna. It is found that wire grid modeling gave essentially identical results to those using surface patches, attesting to the equivalence of the two numerical techniques in NEC (less than 2 dB differences).
| Original language | English (US) |
|---|---|
| Pages (from-to) | 236-239 |
| Number of pages | 4 |
| Journal | IEEE Antennas and Propagation Society, AP-S International Symposium (Digest) |
| Volume | 1 |
| State | Published - Dec 1 1989 |
| Event | International Symposium Digest - Antennas and Propagation - 1989 - San Jose, CA, USA Duration: Jun 26 1989 → Jun 30 1989 |
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All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering
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Investigation of near fields for shipboard antennas using the numerical electromagnetics code (NEC). / Elliniadis, P.; Breakall, James Kenneth.
In: IEEE Antennas and Propagation Society, AP-S International Symposium (Digest), Vol. 1, 01.12.1989, p. 236-239.Research output: Contribution to journal › Conference article
TY - JOUR
T1 - Investigation of near fields for shipboard antennas using the numerical electromagnetics code (NEC)
AU - Elliniadis, P.
AU - Breakall, James Kenneth
PY - 1989/12/1
Y1 - 1989/12/1
N2 - The numerical electromagnetics code (NEC) was used to evaluate the admittance, the average power gain, and the electric near and far fields of a monopole antenna (λ/5) mounted on a cubical box (λ/3 per side) over a perfectly conducting ground plane. Two models of the box, using surface patches and wire grids, were evaluated. The monopole was positioned at the center, the edge, and at a corner of the box top surface. NEC results were examined and compared with experimental data and with results from 'PATCH' another independent electromagnetic modeling code. Contour and three-dimensional amplitude and phase plots of the near electric fields are presented. Radiation patterns were calculated to relate far-field and near-field behavior of the antenna. It is found that wire grid modeling gave essentially identical results to those using surface patches, attesting to the equivalence of the two numerical techniques in NEC (less than 2 dB differences).
AB - The numerical electromagnetics code (NEC) was used to evaluate the admittance, the average power gain, and the electric near and far fields of a monopole antenna (λ/5) mounted on a cubical box (λ/3 per side) over a perfectly conducting ground plane. Two models of the box, using surface patches and wire grids, were evaluated. The monopole was positioned at the center, the edge, and at a corner of the box top surface. NEC results were examined and compared with experimental data and with results from 'PATCH' another independent electromagnetic modeling code. Contour and three-dimensional amplitude and phase plots of the near electric fields are presented. Radiation patterns were calculated to relate far-field and near-field behavior of the antenna. It is found that wire grid modeling gave essentially identical results to those using surface patches, attesting to the equivalence of the two numerical techniques in NEC (less than 2 dB differences).
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M3 - Conference article
VL - 1
SP - 236
EP - 239
JO - AP-S International Symposium (Digest) (IEEE Antennas and Propagation Society)
JF - AP-S International Symposium (Digest) (IEEE Antennas and Propagation Society)
SN - 0272-4693
ER -