Journal ArticleDOI
Input impedance of horizontal dipole aerials at low heights above the ground
TLDR
In this paper, the large increase in the radiation resistance of a horizontal dipole at low heights above the ground, predicted by the mathematical analysis of Sommerfeld and Renner, is confirmed by actual measurement for the case of an essentially pure dielectric ground.Abstract:
The large increase in the radiation resistance of a horizontal dipole at low heights above the ground, predicted by the mathematical analysis of Sommerfeld and Renner, is confirmed by actual measurement for the case of an essentially pure dielectric ground. Measurements carried out above a series of conducting mats of increasing mesh size corroborate the supposition that the large increase in the radiation resistance at low heights is caused by a corresponding increase in the energy radiated downwards into the dielectric ground.read more
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Journal ArticleDOI
Directive properties of antennas for transmission into a material half-space
TL;DR: In this article, the field of a general antenna over the half-space is expressed as a spectrum of plane waves and the integrals representing the field are evaluated asymptotically to obtain the "geometrical optics" field of the antenna, and this field is used to define quantities that describe the directive properties of an antenna (pattern function, gain, and directivity).
Journal ArticleDOI
A new ultrawide-bandwidth dielectric-rod antenna for ground-penetrating radar applications
TL;DR: In this paper, a new ultrawide-bandwidth dielectric-rod antenna is presented with its application in detecting shallow targets, such as antipersonnel (AP) mines.
Book
Atmospheric Radar: Application and Science of MST Radars in the Earth's Mesosphere, Stratosphere, Troposphere, and Weakly Ionized Regions
TL;DR: In this paper, the theory, design, and applications of atmospheric radar are discussed, and a detailed overview of radar designs provides a wealth of knowledge and tools, providing readers with a strong basis for building their own instruments.
Journal ArticleDOI
Enhanced Radiation From a Horizontal Dipole Closely Placed Above a PEC Ground Plane Using a Parasitic Strip
TL;DR: In this article, a straight parasitic strip, closely and horizontally placed above a perfect electrical conductor ground plane, is used to greatly enhance the radiation of a horizontally positioned center-fed half-wave dipole through the phase compensation from the strip.
ReportDOI
Three techniques for measurement of ground constants in the presence of vegetation
TL;DR: In this article, the authors investigated three other techniques that should provide more accurate input data for modeling, mathematically, radio antenna performance in forested areas, including the open-wire transmission-line probe method, dipole feed-resistance method, and geophysical resistivity method.
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Related Papers (5)
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