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Modal control of reflector surfaces using far‐field power measurements
Author(s) -
Silverberg Larry,
Washington Gregory
Publication year - 1994
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.4650071218
Subject(s) - reflector (photography) , autofocus , modal , optics , convergence (economics) , surface (topology) , vibration , power (physics) , cassegrain antenna , acoustics , range (aeronautics) , antenna (radio) , engineering , physics , periscope antenna , materials science , mathematics , geometry , telecommunications , focus (optics) , antenna measurement , aerospace engineering , light source , quantum mechanics , polymer chemistry , economics , economic growth
The far‐field power received from a transmitting reflector antenna was maximized by varying the shape of the reflector surface. The shape of the reflector surface was controlled by a modal autofocus method which deformed the membrane sequentially into the full range of its natural modes of vibrations. The convergence time was shown to depend on the scan time associated with a natural mode of vibration, the number of cycles the algorithm underwent before convergence, and the desired resolution of the surface shape. A numerical example illustrates the method presented. © 1994 John Wiley & Sons, Inc.