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Optical alignment of the spherical antenna measurement system

Author: Gilbert A Morin; John W Moffat; Claude J Brochu; Defence Research Establishment Ottawa.
Publisher: Ottawa : Defence Research Establishment Ottawa, 1997.
Series: Canada DREO Report, 1316.; Microlog, 98-02191.
Edition/Format:   Book   Microform : National government publication : Microfiche : EnglishView all editions and formats
Summary:
Describes a custom designed system and novel techniques developed to perform a precision alignment of a microwave antenna measurement range using optical instrumentation. The system is an indoor spherical test range located in an anechoic chamber. The alignment hardware consists of several levels, an electronic theodolite with built-in autocollimation capability, and a unique target mirror assembly with the target  Read more...
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Details

Material Type: Government publication, National government publication
Document Type: Book
All Authors / Contributors: Gilbert A Morin; John W Moffat; Claude J Brochu; Defence Research Establishment Ottawa.
OCLC Number: 612951890
Reproduction Notes: Microfiche. Toronto : Micromedia Limited, [199?]. 1 microfiche : negative. Microlog ; 98-02191.
Description: xi, 80 pages : illustrations.
Series Title: Canada DREO Report, 1316.; Microlog, 98-02191.
Responsibility: by Claude J. Brochu, John W. Moffat and Gilbert A. Morin.

Abstract:

Describes a custom designed system and novel techniques developed to perform a precision alignment of a microwave antenna measurement range using optical instrumentation. The system is an indoor spherical test range located in an anechoic chamber. The alignment hardware consists of several levels, an electronic theodolite with built-in autocollimation capability, and a unique target mirror assembly with the target viewable from both sides. A hand-held programmable calculator is used to calculate angular positions and distances. The instrumentation allows convenient measurement and monitoring of both the range alignment and the orthogonality and intersection of the multi-positioner spherical system axes. Numerous techniques and procedures developed for optical alignment are detailed, with step-by-step instructions to guide the user toward a precise optical alignment. The appendix includes a listing of a program for processing the theodolite readings and description of a technique to measure the phase centre of an antenna.

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Primary Entity

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