MEASURED IMPEDANCES OF SOME TACTICAL ANTENNAS NEAR GROUND.
Abstract
The dipole antenna was the most thoroughly investigated of the three (dipole, loop, slant-wire). Its driving point impedance decreased as expected by the image method, with decrease in height until the height was reached where the end of the dipole approximately subtended the Brewster angle. The driving point impedance then increased rapidly for very low heights. A driving point impedance increase with low height was observed for the other two antennas as well. For dipoles and large horizontal loops at low height above ground the image method calculations of impedance are insufficient. In like manner the treatment of the slant wire as a monopole fed against ground is also insufficient. As an example, the slant wire as recommended in the AN/TRC-77 manual is improperly designed for transmitting efficiency. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1964
- Accession Number
- AD0480593
Entities
People
- Terry S. Cory
- William A. Ray
Organizations
- SRI International