Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
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Page : 964 pages
File Size : 22,30 MB
Release : 1988
Category : Aeronautics
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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author : Hermann W. Ehrenspeck
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Page : 42 pages
File Size : 35,81 MB
Release : 1974
Category : Antenna arrays
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Eight short backfire (SBF) elements aligned on a common planar reflector form a highly efficient fan-beam array capable of yielding a maximum gain of approximately 24 dB. The influence of parameter variations on the array patterns and directivity was experimentally determined by varying the frequency. Normalized design parameters for highest efficiency and for circular polarization capability are tabulated. All array dimensions are given in wavelengths so that each application can easily be scaled for any desired frequency.
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Page : 170 pages
File Size : 50,12 MB
Release : 1971
Category : Bibliography
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Author : Hermann W. Ehrenspeck
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Page : 40 pages
File Size : 44,48 MB
Release : 1971
Category : Antenna arrays
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Short-backfire (SBF) antennas can be simply converted into highly directive and efficient array elements. Each SBF element is the equivalent of four to six dipole elements of conventional multielement arrays. Models of two-, four-, and eight-element SBF arrays have yielded gains of 17, 19, and 22 dB, respectively. Radiation patterns are presented, including the sum and difference patterns in the two major planes (E and H), as well as those for diagonal cuts at plus or minus 45 degrees. All physical dimensions are given in wavelengths so that each model can be easily scaled for any desired frequency. (Author).
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Page : 404 pages
File Size : 13,80 MB
Release : 1982
Category : Antennas (Electronics)
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Page : 1576 pages
File Size : 17,45 MB
Release : 1966
Category : Government publications
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Page : 948 pages
File Size : 43,73 MB
Release : 1971
Category : Research
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Page : 2092 pages
File Size : 27,56 MB
Release : 1997
Category : Electrical engineering
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Page : 1330 pages
File Size : 23,48 MB
Release : 1971-06
Category : Technology
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Page : 718 pages
File Size : 39,30 MB
Release : 1971
Category : Engineering
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