Propagation of short radio waves by Donald Kerr

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By Donald Kerr

Comprises: parts of the matter. concept of propagation in a horizontally stratified surroundings. Meteorology of the retraction challenge. Experimental stories of refraction. Reflections from the earth's floor. Radar goals and echoes. Meteorological echoes. surroundings attenuation.

Also available:

concept and layout of Microwave Filters - ISBN 9780852967775
Geometrical conception of Diffraction for Electromagnetic Waves, third variation - ISBN 9780863410628

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There are, of course, "windows" in the infrared region, but on the whole this wavelength range is not likely to be useful for transmission over appreciable distances. 3481 cm. See C. H. Townes and F. R. Merritt, Phys. , 70, 558 (1946). CHAPTER 2 THEORY OF PROPAGATION IN A HORIZONTALLY STRATIFIED ATMOSPHERE BY JOHN E. FREEHAFER, WILLIAM T. FISHBACK, WENDELL H. AND DONALD E. FURRY, KERR This chapter presents a development of the theory of propagation of very short electromagnetic waves in free space, over a plane earth, and over a spherical earth, including the effects of the electromagnetic properties of the earth and refraction by the atmosphere.

The effect of refraction over the ocean surface on the relation between echo intensity and range. The crosses and circles represent data taken on two successive days; one day was characterized by a strong surface duct, and the other was not. The wavelength was 10 cm, and the radar and target were at heights of 120 and 6 ft above the ocean surface, respectively. The solid line represents the echo to be expected in the absence of ducts (see text). The effects of surface ducts are noticed most often as an extension of operating range of both one-way and radar systems operating near the surface.

In general /(#,$) is a complex function of the angles, although for most purposes in this volume only real forms for/ will be employed. The generalization of the present material for complex / is obvious. The Poynting vector of the radiated wave S(0,<£) is directed radially outward from the antenna, and the time average of its magnitude S(O,) gives the rate of energy flow per unit area in the direction of transmission. 2 Combining Eqs. (1) and (2), we have 3(0,*) = IM#)l2So, (3) where So is the value of S in the direction of maximum transmission, corresponding to Eo.

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