Analysis of HF antennas on a helicopter in the presence of a stratified ground

Dong Ho Han; Anastasis C. Polycarpou; Constantine Balanis

doi:10.1109/APS.1999.789186

Analysis of HF antennas on a helicopter in the presence of a stratified ground

Dong Ho Han, Anastasis C. Polycarpou, Constantine Balanis

Electrical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Analysis of antennas on a helicopter airframe including the surrounding environment, such as the ground, will provide much more reliable radiation characteristics for communication link budget predictions. In order to account for all reflections and diffractions from the airframe, as well as those from a stratified ground, a full-wave analysis should be used. Since the exact Green's function for a stratified ground is available, the radiation problem of a helicopter above the ground reduces to a problem of finding the total equivalent source in the presence of the ground. In this paper, HF antennas, such as a 14-ft towel-bar and a 24-ft inverted-L on the AH-64 (Apache) full-scale helicopter, are analyzed in the presence of a stratified ground. In particular, the ground influence on the radiation pattern is investigated using the finite element method (FEM) in conjunction with Norton's approximation. Therefore, the radiated field contains not only the space wave but also the surface wave which is important for a short observation distance. The lossy ground is defined by its relative permittivity and electric conductivity.

Original language	English (US)
Title of host publication	IEEE Antennas and Propagation Society International Symposium
Subtitle of host publication	Wireless Technologies and Information Networks, APS 1999 - Held in conjunction with USNC/URSI National Radio Science Meeting
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	496-499
Number of pages	4
Volume	1
ISBN (Electronic)	078035639X, 9780780356399
DOIs	https://doi.org/10.1109/APS.1999.789186
State	Published - Jan 1 1999
Event	1999 IEEE Antennas and Propagation Society International Symposium, APSURSI 1999 - Orlando, United States Duration: Jul 11 1999 → Jul 16 1999

Other

Other	1999 IEEE Antennas and Propagation Society International Symposium, APSURSI 1999
Country/Territory	United States
City	Orlando
Period	7/11/99 → 7/16/99

ASJC Scopus subject areas

Computer Networks and Communications
Electronic, Optical and Magnetic Materials
Instrumentation
Radiation

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10.1109/APS.1999.789186

Cite this

Han, D. H., Polycarpou, A. C., & Balanis, C. (1999). Analysis of HF antennas on a helicopter in the presence of a stratified ground. In IEEE Antennas and Propagation Society International Symposium: Wireless Technologies and Information Networks, APS 1999 - Held in conjunction with USNC/URSI National Radio Science Meeting (Vol. 1, pp. 496-499). Article 789186 Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APS.1999.789186

Analysis of HF antennas on a helicopter in the presence of a stratified ground. / Han, Dong Ho; Polycarpou, Anastasis C.; Balanis, Constantine.
IEEE Antennas and Propagation Society International Symposium: Wireless Technologies and Information Networks, APS 1999 - Held in conjunction with USNC/URSI National Radio Science Meeting. Vol. 1 Institute of Electrical and Electronics Engineers Inc., 1999. p. 496-499 789186.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Han, DH, Polycarpou, AC & Balanis, C 1999, Analysis of HF antennas on a helicopter in the presence of a stratified ground. in IEEE Antennas and Propagation Society International Symposium: Wireless Technologies and Information Networks, APS 1999 - Held in conjunction with USNC/URSI National Radio Science Meeting. vol. 1, 789186, Institute of Electrical and Electronics Engineers Inc., pp. 496-499, 1999 IEEE Antennas and Propagation Society International Symposium, APSURSI 1999, Orlando, United States, 7/11/99. https://doi.org/10.1109/APS.1999.789186

Han DH, Polycarpou AC, Balanis C. Analysis of HF antennas on a helicopter in the presence of a stratified ground. In IEEE Antennas and Propagation Society International Symposium: Wireless Technologies and Information Networks, APS 1999 - Held in conjunction with USNC/URSI National Radio Science Meeting. Vol. 1. Institute of Electrical and Electronics Engineers Inc. 1999. p. 496-499. 789186 doi: 10.1109/APS.1999.789186

Han, Dong Ho ; Polycarpou, Anastasis C. ; Balanis, Constantine. / Analysis of HF antennas on a helicopter in the presence of a stratified ground. IEEE Antennas and Propagation Society International Symposium: Wireless Technologies and Information Networks, APS 1999 - Held in conjunction with USNC/URSI National Radio Science Meeting. Vol. 1 Institute of Electrical and Electronics Engineers Inc., 1999. pp. 496-499

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Analysis of HF antennas on a helicopter in the presence of a stratified ground

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