Moment Method Analysis of VHF Antennas on Vehicles on an Imperfect Ground.
Abstract
The study of vhf vehicle antennas is complicated by the irregular vehicle which is typically of the order of a wavelength and the imperfectly conducting ground on which the vehicle stands. This memo presents a treatment of idealized armoured vehicles fitted with ship antennas standing on an imperfectly conducting ground based on the 'Moment Method' for the vehicle and including a Sommerfeld based treatment of the ground. The 20-76 MHz vhf band is of interest but since the investigation showed that ground effects are more important at the lower part of the band attention was focussed on this. Idealized geometrical versions of the armoured vehicles of interest were examined. The idealized models are fitted with 2M whip antennas in the position used in practice. The vehicles are 8M long and are supposed to be supported by insulating tracks 30cm above ground. The numerical analysis was supplemented by some experimental work carried out at 1/30 scale in an anechoic chamber.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1981
- Accession Number
- ADA104273
Entities
People
- D. J. Brammer
- Dylan F. Williams
Organizations
- Royal Signals and Radar Establishment