RADIATION PATTERNS OF AN HF VERTICAL DIPOLE NEAR A SLOPING BEACH
作者:
K. S. Park,
R. J. King,
C. J. Teng,
期刊:
Electromagnetics
(Taylor Available online 1982)
卷期:
Volume 2,
issue 2
页码: 129-145
ISSN:0272-6343
年代: 1982
DOI:10.1080/02726348208915160
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Using the compensation theorem integral formulation,the radiationpatterns of a verticalel ectric dipolenearal and-sloping beach-sea boundaryare investigated numerically.Since the formulation invokes the surfaceimpedance concept,the surface impedance along the sloping beach is calculatedusing parallel two-layer stratified media theory.The transition of thesurface impedance of the land to that of the sea is found to take placeoverasmall fraction of a free space wavelength from the shoreline,so the slopingbeach behaves very much like anabrupt boundary.The additional losses of thesloping beach,compared to an abrupt land-sea boundary,tend to reduce theradiation field slightly at low elevation angles and enhance the field slightlyat higher angles.Allowing fora “wet” beach in the immediate foreground ofthe shoreline has a converse effect.
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