Accession Number:

AD0653609

Title:

INITIAL VHF PROPAGATION RESULTS USING XELEDOP TECHNIQUES AND LOW ANTENNA HEIGHTS

Descriptive Note:

Special technical rept.

Corporate Author:

STANFORD RESEARCH INST MENLO PARK CA

Personal Author(s):

• Shrauger, N. K.
• Taylor, K. L.

Report Date:

1966-12-01

Pagination or Media Count:

86.0

Abstract:

An adaptation of the Xeledop technique for study of propagation problems associated with VHF manpack radios is described and the results of inital VHF propagation tests for several frequencies, polarizations, and terrains for low antenna heights are presented. Initial results show that the choice of frequency and antenna polarization has a significant effect on propagation in a situation similar to a possible employment of manpack radio sets. Vertical polarization was found to be superior for transmission of signals over open terrain horizontal polarization was superior for the foliage- covered terrain of the tests. The effect of frequency was also examined and it was found that the type of terrain generally has less effect on the received signals as the transmission frequency is increased from 50 to 100 MHz. Future propagation studies and measurements using the Xeledop technique are suggested.

Descriptors:

• *COMMUNICATION AND RADIO SYSTEMS
• *MILITARY RESEARCH
• *RADIO EQUIPMENT
• ANTENNA RADIATION PATTERNS
• BEACHES
• DIPOLE ANTENNAS
• ENVIRONMENTAL TESTS
• IONOSPHERIC PROPAGATION
• MOBILITY
• PERFORMANCE(ENGINEERING)
• PLANTS(BOTANY)
• RADIO SIGNALS
• RADIO TRANSMISSION
• TERRAIN
• THAILAND
• TROPICAL REGIONS
• VERY HIGH FREQUENCY

Subject Categories:

• Radiofrequency Wave Propagation
• Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE