Accession Number:

ADD018837

Title:

Rosette-Shaped Monopole Antenna Top-Load for Increased Antenna Voltage and Power Capability

Descriptive Note:

Patent, filed 21 Apr 94, patented 30 Sep 97

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

1997-09-30

Pagination or Media Count:

17.0

Abstract:

In an umbrella top-loaded monopole UTLM antenna, the charge distribution on top-load radials increases approximately linearly from the top of the antenna because the activated wires are separating from the tower and each other at the same time they are getting closer to ground. The UTLM antenna of the invention incorporates a top-load configuration in which top-load elements, whether they be radiating or receiving, are arranged in the shape of frames that originate at the top of the antenna and that extend away from the antenna towards the antennas base where, at those points of the configuration furthest from the antenna tower and closest to ground at least two top-load elements converge to shield each other and hence reduce charge density. The top-load frames may be arranged contiguously such as in a rosette configuration. The self-shielding effect of the invention permits an antenna to operate at considerably higher voltage. This top-load configuration can also show superior effective height and static capacitance as compared to the traditional UTLM antenna. Because of the efficiency offered by the invention, intrinsic bandwidth and radiated power can be superior to the typical UTLM antenna even with the same top-load voltage limit. Such results can be achieved with half of the traditional number of top-load high voltage insulators. This new top-load configuration also facilitates top-load element deicing.

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE