Publication:
An investigation of near fields for HF shipboard antennas: surface PATCH and wire grid modeling using the Numerical Electromagnetics Code

Authors
Elliniadis, Panagiotis
Subject Authors
Near fields
NEC (Numerical Electromagnetics Code)
Antenna
Monopole
Wire grid
Surface patch
Admittance
Avisors
Adler, Richard W.
Breakall, James K.
Date of Issue
1988-12
Date
December 1988
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
The Numerical Electromagnetics Code (NEC) was used to evaluate the admittance, average power gain, and the electric near and far field of a monopole antenna mounted on a cubical box over a perfectly conducting ground plane. Two models of the box, employing surface patches and wire grids, were evaluated. The monopole was positioned at the center, the edge, and at a corner of the box's top surface. Admittance and average power gain of the antenna were calculated. NEC results were examined and compared with experimental data and with results from "PATCH", another independent electromagnetic modeling code. The near electric field was calculated for both models. Computer graphics techniques were presented for plotting NEC near field results using DISSPLA (Display Integrated Software System and Plotting Language), a commercial graphics package. Contour and 3-D amplitude, and phase plots of the near electric fields were presented. Radiation patterns were calculated to relate far field and near field behavior of the antenna. Surface patch and wire grid models are compared and conclusions were presented.
Type
Thesis
Description
Series/Report No
Department
Electrical and Computer Engineering
Other Units
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
NPS-62-89-016
Sponsors
Naval Ocean Systems Center
Funder
O&MN, Direct Funding
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
Copyright is reserved by the copyright owner
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