A newly developed high-efficiency S-band tracking feed is described. It is a focal-point feed designed primarily for use with parabolic reflectors in the 15 to 25 foot diameter class. A five-element aperture geometry was developed to obtain improved performance in sum and difference pattern efficiency over that normally obtained with four-element, hybrid-comparator feeds. Two major e mprovements were obtained: a. Elimination of the conventional hybrid comparator resulted in the "ultimate" sum-channel efficiency, hence minimum noise temperature degradation due to feed losses. b. Independent control of the difference-pattern illumination produced "near-optimum" gainslope performance simultaneously with optimized sum-channel illumination. Design theory for this feed geometry is discussed, and measured impedance and radiation pattern data obtained from the finished feed system are presented.


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    Titel :

    The Ultimate S-Band Monopulse Focal-Point Feed


    Beteiligte:


    Erscheinungsdatum :

    1966-11-01


    Format / Umfang :

    1897526 byte




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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