A FORESHORTENED CENTER-FED WHIP ANTENNA
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1965
- Accession Number
- AD0611278
Entities
People
- Watson P. Czerwinski
Organizations
- United States Army Communications-Electronics Command