Feed arrangement for axis definition of paraboloid reflector

Feed arrangement for axis definition of paraboloid reflector

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An arrangement is proposed for the determination of the electrical axis of a paraboloid, utilising the effects of the subsidiary axial maxima that occur when the paraboloid is illuminated by a plane wave. By combining the signal received at the largest of these maxima with a sample taken from the main received signal in antiphase, a null detection system gives the location of the axis with high sensitivity. This is sufficient to enable the combination to be used to detect small distortions of the paraboloid, and as a precise axis-location device.


    1. 1)
      • D.R. RHODES . (1959) , Introduction to monopulse.
    2. 2)
      • H.C. Minnett , B. Maca. Thomas . Fields in the image space of symmetrical focusing reflectors. Proc. IEE , 10 , 1419 - 1430
    3. 3)
      • S. Cornbleet . Determination of the aperture field of an antenna by a beam-displacement measurement. Proc. IEE , 10 , 1398 - 1402

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