2OO TABLE 332. 



WIRELESS TELEGRAPHY. 



Radiation Resistances lor Various Wave-Lengths and Antenna Heights. 



The radiation theory of Hertz shows that the radiated energy of an oscillator may be repre- 

 sented by E = constant (h 2 /A 2 ) I 2 , where h is the length of the oscillator, A, the wave-length and 

 I the current at its center. For a flat-top antenna E = 1600 (h 2 / A 2 ) I 2 watts ; 1600 h 2 / A 2 is called 

 the radiation resistance. 



(h = height to center of capacity of conducting system.) 



Austin, Jour. Wash. Acad. of Sci. i, p. 190, 1911. 



SMITHSONIAN TABLES. 



v 





