MEASURED PERFORMANCE OF HF SUBSURFACE DIPOLES
Abstract
Theoretical analysis and measured data are presented for determining the characteristics of High Frequency (HF) subsurface dipole antennas. The agreement between theory and experimental data is shown to be excellent. It is shown that HF subsurface dipoles radiate a surface wave having the same characteristics as that launched by an above ground vertical monopole and also radiate a space wave which has a pattern identical to that of a half wave horizontal dipole located a quarter wavelength or less above ground. The subsurface dipole length is shortened to about one-third to two-thirds of its above ground equivalent. Engineering curves are presented which enable the system engineer to design a small, physically hard, relatively cheap HF antenna array having a gain of approximately -10 db below that of simple above ground antennas, and having the radiation characteristics of both above ground whip and horizontal dipole antennas.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1969
- Accession Number
- AD0690609
Entities
People
- John N. Entzminger Jr.
- Stuart H. Talbot
- Thomas F. Treadway
Organizations
- Rome Laboratory