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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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