Dipole Receive Characteristics in the Presence of Sea Water
MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
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ARINE ANTENNAS, DIPOLE ANTENNAS, ULTRAHIGH FREQUENCY, NUMERICAL ANALYSIS, RADIOFREQUENCY POWER, SPACE TO SURFACE, MATHEMATICAL MODELSThe receive properties for a dipole in the presence of sea water were obtained by solving integral equations for currents along the unloaded dipole and its image. For dipoles of 0.1 wavelength or higher above the sea surface, the performance resembled that of a dipole over a perfectly conducting plane for dipoles within 0.1 wavelength above the sea surface, the relative gain dropped in about the same proportion as the relative reduction in the strength of the resultant electric field. An insulated wavelength2 dipole with a conjugate load matched in free space had a relative power gain of 17 dB below isotropic at the sea surface.
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