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A study of the intensity variations of downcoming wireless waves

Published online by Cambridge University Press:  24 October 2008

J. A. Ratcliffe  and
J. L. Pawsey
J. A. Ratcliffe
Affiliation:
Sidney Sussex College
J. L. Pawsey
Affiliation:
Sidney Sussex College
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Extract

Experiments are made on wave-lengths between 200 and 500 ms. for distances of transmission less than 200 kms. It is found that the variations of downcoming wave intensity are uncorrelated on two receivers separated by about one wave-length, and it is shown that this implies a considerable amount of lateral deviation of the waves. A special receiver is used to confirm the occurrence of lateral deviation, and an estimate of the angle of deviation is made. The possible causes of intensity variation are considered in the light of these experimental results, and it is suggested that a major cause of “fading” is the interference, at the ground, of waves “scattered” from a series of diffracting centres distributed over an area of radius at least 20 kms. in the present experiments. The possible results of such a mechanism are discussed.

Type
Research Article
Information
Mathematical Proceedings of the Cambridge Philosophical Society , Volume 29 , Issue 2 , May 1933 , pp. 301 - 318
Copyright
Copyright © Cambridge Philosophical Society 1933

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References

REFERENCES

(1)Pickard, , Proc. Inst. Rad. Eng., vol. 12, p. 119 (1924).Google Scholar
(2)Appleton, and Ratcliffe, , Proc. Roy. Soc., Vol. 115, pp. 291, 305 (1927).Google Scholar
(3)Parkinson, , Proc. Inst. Rad. Eng., vol. 17, p. 1042 (1929).Google Scholar
(4)Merritt, and Bostwick, , Jour. Frank. Inst., vol. 211, p. 539 (1931).CrossRefGoogle Scholar
(5)Cherry, and Martyn, , Radio Board of Australia, Report No. 4 (1932).Google Scholar