LIGHTWEIGHT BROADBAND SHIPBOARD HIGH FREQUENCY ANTENNA

A SERIES OF BROADBAND HF ANTENNA STRUCTURES WAS ANALYZED FOR POTENTIAL SHIPBOARD APPLICATIONS. INCLUDED WERE ALTSHULTER INSERTIONS, DIELECTRIC LOADING, MULTIPLE REACTIVE INSERTIONS, ACTIVE TRANSMIT ANTENNA, AND MULTIPLE TRANSMISSION LINES. OBJECTIVES INCLUDE 3 TO 1 MAXIMUM VSWR OVER THE 2 TO 30 MHZ BAND, OMNI-DIRECTIONAL, MEET SEVERE ENVIRONMENTAL SPECIFICATIONS, HIGH EFFICIENCY, AND OPERATE WITH 1 KILOWATT RF INPUT. A SIMILAR ANALYSES WAS MADE FOR A BROADBAND RECEIVING ANTENNA. SEVERAL ACTIVE DESIGNS WERE CONSIDERED INCLUDING SOLID STATE AND VACUUM TUBE VERSIONS.