ANTENNA AMPLITUDE AND PHASE PATTERN MEASUREMENTS USING AN AIRCRAFT-TOWED TRANSMITTER

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Authors
  1. Jenkins, R.W.
Corporate Authors
Industry Canada, Ottawa ONT (CAN) Communications Research Centre;Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
A previously built antenna pattern measurement system, consisting of a short transmitting dipole and self-contained transmitter towed behind a light aircraft, was modified to permit measurements of both antenna gain and relative phase. A differential GPS positioning system was added to provide the necessary accurate transmitter position information. The pattern measurement system is intended for calibrating HF antenna arrays used in direction-finding and other applications requiring knowledge of the array manifold. The system was used to provide element pattern measurements on an HF antenna array located near Ottawa. The measurements provided a measure of the accuracy of the pattern measurement technique and its limits of applicability. The element patterns were observed to be affected by interactions between neighbouring elements and other localized features and, to a lesser extent, by larger-scale more distant ground or topographical effects.
Report Number
CRC-95-003 —
Date of publication
01 Sep 1995
Number of Pages
53
DSTKIM No
96-00758
CANDIS No
154743
Format(s):
Document Image stored on Optical Disk;Hardcopy

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