30D 



Table 332. 

 WIRELESS TELEGRAPHY. 



Radiation Resistances lor Various Wave-Lengtlis and Antenna Heights. 



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

 sented by E = constant (hVA^) P, where h is the length of the oscillator, K, the wave-length and 

 I the current at its center. For a fiat-top antenna E= 1600 (hV^^) I^ watts; 1600 hV^^ 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. 



