ON MARITIME VHF/UHF NOTCH AERIAL SYSTEMS
The standard dipole normally used for VHF communications on marine vehicles suffers from many disadvantages from the operators point of view-typical of these are (a) the frequent need to change the aerials due to damage in adverse weather conditions, and (b) the inability of these aerials to produce a reasonably omnidirectional polar diagram when sited in the usual position at the yardarm of vessels amidst the top hamper encountered in most merchant vessels. This lecture paper gives details of the theory, design, performance and typical installation of a marine aerial system capable of producing a near ideal radiation pattern and suitable for VHF communications specifically in the band 156-162 MHz. Other frequency bands can be accommodated and indeed a system covering the entire UHF bank of 225-400 MHz is currently undergoing trials.
- Presented at the April 25-27, 1973 Seattle RTCM Assembly Meeting. Volume 1--Papers A thru E, Maritime Satellite Telecommunications Activity; Volume 2--Papers F thru L, Maritime Antennas, Personnel, and ITU Conference Activity; Volume 3--Papers M thru R, Systems Approaches to Maritime Telecommunications; Volume 4--Papers S thru Y, Navigation and Position Fixing in Maritime Telecommunications. Sold only as a complete four volume set--$10.00 per set.
Radio Technical Commission for Marine Services/Federal Communications Commission
Washington, DC USA 20554
- Hanson, PSR
- Publication Date: 1973-4
- Pagination: 16 p.
- Volume: 2
- TRT Terms: Antennas; Radio equipment; Radio signals
- Old TRIS Terms: Antenna signal measurement; Antenna systems
- Subject Areas: Marine Transportation; Operations and Traffic Management;
- Accession Number: 00050260
- Record Type: Publication
- Source Agency: Radio Technical Commission for Marine Services
- Report/Paper Numbers: Paper 102-73/DO-71
- Files: TRIS
- Created Date: Nov 14 1973 12:00AM