Accession Number:

ADA181559

Title:

Anti-Skywave AM Broadcast Antenna Design.

Descriptive Note:

Master's thesis,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

1987-03-01

Pagination or Media Count:

180.0

Abstract:

This thesis investigates the design of an anti-skywave ASW AM broadcast antenna. The parameters of a typical AM broadcast antenna are presented first. Then the design proposed is studied by numerical modeling with the Numerical Electromagnetic Code NEC. Bibys proposed design involves a ring of short radiators with a conventional monopole operating over finite ground. To analyze the behaviour of Bibys proposed ASW antenna, a generic radiator study is conducted to test the ability of different sized radiators to launch the sky wave and the ground wave first as isolated elements and then as closely coupled radiators with cancelling phasing. Finally, some potential candidate structures are proposed for AM broadcast transmission which might achieve the desired characteristics of ground wave enhancement and sky wave suppression. Keywords Monopole and dipole antennas Numerical Electromagnetic Code NEC.

Subject Categories:

  • Fluid Mechanics
  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE