In this article a mobile communications antenna consisting of concentric rings of circularly polarized circular patches will be described. For certain sets of relative phases, optimization of geometry and excitation amplitudes by simulated annealing synthesizes a conical beam with a maximum at a desired ancle theta and satisfactory directivity within a desired theta range. An example of a two-ring array 50 cm in diameter with directivity greater than 3 dBi between theta = 35 deg of angle and theta = 50 deg of angle is presented.


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    Title :

    Design of inexpensive printed array for space communication with moving vehicles


    Additional title:

    Entwurf von preiswerten, gedruckten Schaltungen für den Weltraumeinsatz bei der Kommunikation zwischen bewegten Fahrzeugen


    Contributors:


    Publication date :

    2000


    Size :

    4 Seiten, 4 Bilder, 3 Tabellen, 7 Quellen


    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English





    An Inexpensive Digital Watermarking Scheme for Printed Document

    Kundu, M. K. / Maiti, A. K. / Visual Information Engineering Network (Institution of Engineering and Technology) | British Library Conference Proceedings | 2006