Accession Number : AD0889658

Title :   Performance of Toroid Coupled Trees as Antennas.

Descriptive Note : Research and development technical rept.,

Corporate Author : ARMY ELECTRONICS COMMAND FORT MONMOUTH NJ

Personal Author(s) : Johnson, R. F. ; Murphy, K. J. ; Hoverter, R. T. ; Ikrath, K.

Report Date : JUN 1971

Pagination or Media Count : 18

Abstract : Communications over short ranges through dense wooded or jungle terrains remains a major problem for our armies today. An approach to solving this problem is to use a Hybrid Electromagnetic Antenna Coupler (HEMAC) toroid as a transformer-coupler to excite secondary radiation from the vegetation. The combination of the electric and magnetic fields emitted by the toroid are shown to be as effective as a whip antenna for communicating in the wooded areas adjacent to Fort Monmouth. Initial experiments comparing a HEMAC toroid to a whip antenna are discussed. (Author)

Descriptors :   (*RADIO TRANSMISSION, JUNGLES), (*ANTENNAS, TREES), TACTICAL WARFARE, COILS, ANTENNA COMPONENTS, COUPLING CIRCUITS.

Subject Categories : Electrical and Electronic Equipment
      Radiofrequency Wave Propagation
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE