Letter | Published:

Optimum Dimensions of Short-wave Frame Aerials

Nature volume 127, page 407 (14 March 1931) | Download Citation



BECAUSE of the increasing use of short waves in present-day wireless practice, many investigators have studied the nature of the electromagnetic field at distances less than a wave-length from a radiating antenna. The importance of such investigations lies in the fact that a knowledge of the peculiarities of the field at these short distances enables designers of directive beam aerials to space correctly the units of the radiating and receiving systems. For example, for maximum forward radiation the critical spacing between a line of tuned radiating antenn and a line of tuned reflecting wires is now known to be 0.33 or 0.85 of a wave-length and not 0.25 of a wave-length as was originally supposed.1

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  1. 1.

    See publications in Great Britain by and and by and , in the United States by and , in France by , , etc., in Germany by , , and others, and in Russia by and also by .

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  1. The University College, Hull, Feb. 26.

    • L. S. PALMER
    •  & L. L. K. HONEYBALL


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