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Record Details

Record 7 of 12462
Optical antenna gain. I - Transmitting antennas
Author and Affiliation:
Klein, B. J.
Degnan, J. J.(NASA Goddard Space Flight Center, Greenbelt, Md., United States)
Abstract: The gain of centrally obscured optical transmitting antennas is analyzed in detail. The calculations, resulting in near- and far-field antenna gain patterns, assume a circular antenna illuminated by a laser operating in the TEM-00 mode. A simple polynomial equation is derived for matching the incident source distribution to a general antenna configuration for maximum on-axis gain. An interpretation of the resultant gain curves allows a number of auxiliary design curves to be drawn that display the losses in antenna gain due to pointing errors and the cone angle of the beam in the far field as a function of antenna aperture size and its central obscuration. The results are presented in a series of graphs that allow the rapid and accurate evaluation of the antenna gain which may then be substituted into the conventional range equation.
Publication Date: Sep 01, 1974
Document ID:
19740057847
(Acquired Dec 04, 1995)
Accession Number: 74A40597
Subject Category: COMMUNICATIONS
Document Type: Journal Article
Publication Information: Applied Optics; 13; Sept
Publisher Information: United States
Financial Sponsor: NASA; United States
Description: 8p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ANTENNA DESIGN; ANTENNA RADIATION PATTERNS; LASER OUTPUTS; OPTICAL COMMUNICATION; POWER GAIN; TRANSMISSION LOSS; FAR FIELDS; INSTRUMENT ERRORS; LASER MODES; LIGHT TRANSMISSION; MATHEMATICAL MODELS; TELESCOPES
Imprint And Other Notes: Applied Optics, vol. 13, Sept. 1974, p. 2134-2141.
Miscellaneous Notes: 1974, p. 2134-2141
Availability Source: Other Sources
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