Results 281 to 290 of about 216,585 (318)
Some of the next articles are maybe not open access.
Transactions of the American Institute of Electrical Engineers, 1926
UNTIL rather recently, the practise of radio communication was confined to the use of long, earth-bound waves. These waves are preferred on account of the regularity of day and night operation and the absence of fading. The characteristics of the earth-bound wave were extensively explored and there was a tendency to generalize these results assuming ...
openaire +2 more sources
UNTIL rather recently, the practise of radio communication was confined to the use of long, earth-bound waves. These waves are preferred on account of the regularity of day and night operation and the absence of fading. The characteristics of the earth-bound wave were extensively explored and there was a tendency to generalize these results assuming ...
openaire +2 more sources
Scattering of Radio Waves [PDF]
, 1978 The use of the word ‘scattering’ or ‘scatter’ is rather loose, and the distinction between the propagation of waves as discussed in the preceding chapter, and in this one, is somewhat artificial. What we have been concerned about so far is the effect on wave propagation of the fundamentally one-dimensional, plane stratified structure of the ionospheric
Michel Petit, Alain Giraud
openaire +1 more source
The propagation of radio waves
Institution of Electrical Engineers - Proceedings of the Wireless Section of the Institution, 1926The paper gives the results obtained from a systematic study of the received intensities of various long-wave transmitting stations at four receiving stations over a period of nearly two years.The weekly averages of the results are studied, and it is shown that they are inconsistent with any law of steady decay.
openaire +2 more sources
Nature, 1927
IN a recent letter to NATURE (July 2) by two of the present writers, it was pointed out that information was lacking as to the extent to which radio waves could penetrate the earth. By the courtesy of Mr. J. H. Clark, Mr. H. K. Lidstone, and other officials of the famous Caribou Mine, Colorado, an opportunity was offered on Aug.
E. H. Denny, D. A. Keys, A. S. Eve
openaire +2 more sources
IN a recent letter to NATURE (July 2) by two of the present writers, it was pointed out that information was lacking as to the extent to which radio waves could penetrate the earth. By the courtesy of Mr. J. H. Clark, Mr. H. K. Lidstone, and other officials of the famous Caribou Mine, Colorado, an opportunity was offered on Aug.
E. H. Denny, D. A. Keys, A. S. Eve
openaire +2 more sources
The Troposphere and Radio Waves [PDF]
Proceedings of the IRE, 1940 The effect of tropospheric reflections upon both long and short waves is explained by assuming a fairly strong reflection from inversion layers located from 1 to 10 kilometers above the earth's surface. Weather conditions influence the propagation of wireless waves because the changing cyclones and anticyclones vary the height and the reflecting power ...
openaire +1 more source
2003
Publisher Summary The nature of radio signals and the way they travel are the key factors in cellular systems. The frequencies to be used are chosen because of many factors, some of which are technical and others resulting from spectrum allocation issues. Radio signals are electromagnetic waves.
openaire +2 more sources
Publisher Summary The nature of radio signals and the way they travel are the key factors in cellular systems. The frequencies to be used are chosen because of many factors, some of which are technical and others resulting from spectrum allocation issues. Radio signals are electromagnetic waves.
openaire +2 more sources
The Polarization of Radio Waves
Proceedings of the IRE, 1926Prior measurements of wave polarization made at the lower transmission frequencies have uniformly shown vertical electric force at all distances from the transmitter. The present work extends such measurements to the higher frequencies, where it was found that the electric force at any considerable distance from the transmitter was no longer vertical ...
openaire +2 more sources
Engineering & Technology, 2009
As CMOS becomes more capable engineers are using it for RF work, but development has not stopped on the III-V processes that used to be essential.
openaire +2 more sources
As CMOS becomes more capable engineers are using it for RF work, but development has not stopped on the III-V processes that used to be essential.
openaire +2 more sources
Proceedings of the Physical Society. Section B, 1951
A review of the recent work on scattering draws attention to a number of discrepancies in the interpretation of the data. Most workers believe that the scattering is due to clouds in the E layer. The experiments described in this paper indicate that there are several types of scattering phenomena.
openaire +2 more sources
A review of the recent work on scattering draws attention to a number of discrepancies in the interpretation of the data. Most workers believe that the scattering is due to clouds in the E layer. The experiments described in this paper indicate that there are several types of scattering phenomena.
openaire +2 more sources
Proceedings of the IRE, 1934
Following the magneto-ionic theory of Appleton-Hartree, an explanation for the existence of echoes of long delay has been formulated. Realizing that the ordinary and extraordinary rays have opposite senses of polarization, it may be seen that one of these rays will penetrate the E layer while the other may not.
openaire +2 more sources
Following the magneto-ionic theory of Appleton-Hartree, an explanation for the existence of echoes of long delay has been formulated. Realizing that the ordinary and extraordinary rays have opposite senses of polarization, it may be seen that one of these rays will penetrate the E layer while the other may not.
openaire +2 more sources