Accession Number:

AD0611278

Title:

A FORESHORTENED CENTER-FED WHIP ANTENNA

Descriptive Note:

Corporate Author:

ARMY ELECTRONICS COMMAND FORT MONMOUTH NJ

Personal Author(s):

Report Date:

1965-01-01

Pagination or Media Count:

27.0

Abstract:

An experimental investigation was conducted to determine whether the degradation in electrical performance commonly observed with reduced-height helical-wound vertical dipoles can be avoided. A new design approach has been explored which helped define a major cause of this degradation. Data obtained during this investigation supports a working hypothesis that losses associated with circulating currents in the capacitance between turns of a helically wound, electrically short vertical dipole greatly reduce antenna bandwidth and efficiency. A six-foot-high experimental model was constructed and tested as a replacement for the 10-foot whip of Antenna AS-1729 VRC. The design of this foreshortened model minimized circulating current losses throughout the operating band of 30 to 76 Mc and resulted in an average efficiency of 90 compared to the 10-foot whip.

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE