Accession Number:

AD0839429

Title:

COMPACT VHF AIRCRAFT ANTENNA.

Descriptive Note:

Final rept. 23 Feb 65-30 Jan 68,

Corporate Author:

CHU ASSOCIATES LITTLETON MA

Personal Author(s):

• Eovine, Michael A.

Report Date:

1968-08-01

Pagination or Media Count:

86.0

Abstract:

The report describes a VHFFM compact airborne blade antenna operating over the 24 - 76 MHz frequency range in a configuration 8 inches tall with radiation efficiencies in excess of 20 percent. The antenna is a helical monopole configuration in a subsonic aerodynamic blade package. The antenna can be autotuned over the 24 - 76 MHz frequency band with VSWRs less than 1.51.0 and efficiencies in excess of 20 percent and ranging up to 80 percent. It is capable of accepting r-f powers up to 100 Watts average. Weight of the blade antenna is 5 12 pounds a separate control module weighs 3 12 pounds. In addition to description and performance data, the report includes results of scale model studies of this antenna on both rotary and fixed wing aircraft, and its characteristics in a retransmission communication system. Author

Descriptors:

• *COMMUNICATION AND RADIO SYSTEMS
• VERY HIGH FREQUENCY
• AIRCRAFT ANTENNAS
• ARMY AIRCRAFT
• HELICAL ANTENNAS
• FREQUENCY MODULATION
• ANTENNA RADIATION PATTERNS
• OMNIDIRECTIONAL ANTENNAS
• MODEL TESTS
• TUNING DEVICES
• ENVIRONMENTAL TESTS

Subject Categories:

• Aircraft
• Telemetry
• Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE