Accession Number:

ADA255175

Title:

Design and Evaluation of Portable Antennas for Location of Sources of Radio Noise Emanating from Power-Line Hardware

Descriptive Note:

Master's thesis

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

1992-06-01

Pagination or Media Count:

146.0

Abstract:

Power-line noise PLN is a major contribution to factors which cause the loss of signals at naval receiving sites. Navy Signal-to-Noise Enhancement Program SNEP teams have developed portable instrumentation for the location of RF noise-producing power-line hardware. An important component of this instrumentation is a lightweight antenna with modest directivity and wide bandwidth 60-800 MHz. The purpose of this study is the design, construction, analysis and measurement of three customized Log-Periodic Dipole Arrays LPDA for use in locating PLN sources. Modifications to standard LPDA designs include a feeder boom with convenient construction features and emphasis on a compact, lightweight, portable structure. The Numerical Electromagnetic Code NEC was used to analyze the performance of the various designs. Input impedances were measured in operational environments using network analyzers. The final designs were field-tested at a U.S. Naval site in Okinawa and found to be completely acceptable for SNEP use.

Subject Categories:

  • Electric Power Production and Distribution
  • Cybernetics
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE