Full-wave analysis of HF antennas on helicopters using the FDTD, FEM & NEC

Stavros V. Georgakopoulos, Anastasis C. Polycarpou, Constantine A. Balanis

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

To first analyze and eventually try to achieve an optimum design of an HF antenna on a helicopter in free space is a difficult task. The reason is twofold: first, there are many parameters that could be possibly varied; second, accurate numerical methods which can handle large computational problems must be implemented. In this paper, three different numerical methods are presented to predict the input impedance and radiation patterns of scaled HF antennas mounted on a scaled helicopter model. These include the finite-difference time-domain (FDTD) method, the finite element method (FEM) and the method of moment (MoM), specifically the NEC4 code. Predictions are sometimes compared with each other and/or with measurements. In addition to a large computational size, another major challenge for all these methods is the highly resonant nature of these antennas, loops or inverted-L's, which makes the overall problem ill-conditioned. The advantages and disadvantages of each method, in relation to the analysis of HF antennas in the presence of geometrically complex structures, are emphasized.

Original languageEnglish
Title of host publicationIEEE Antennas and Propagation Society International Symposium
Subtitle of host publicationWireless Technologies and Information Networks, APS 1999 - Held in conjunction with USNC/URSI National Radio Science Meeting
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1058-1061
Number of pages4
ISBN (Electronic)078035639X, 9780780356399
DOIs
Publication statusPublished - 1999
Externally publishedYes
Event1999 IEEE Antennas and Propagation Society International Symposium, APSURSI 1999 - Orlando, United States
Duration: 11 Jul 199916 Jul 1999

Publication series

NameIEEE Antennas and Propagation Society International Symposium: Wireless Technologies and Information Networks, APS 1999 - Held in conjunction with USNC/URSI National Radio Science Meeting
Volume2

Conference

Conference1999 IEEE Antennas and Propagation Society International Symposium, APSURSI 1999
Country/TerritoryUnited States
CityOrlando
Period11/07/9916/07/99

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