//chapter-8 page 348 example 8.15
//==============================================================================
clc;
clear;

//For a reflex klystron 
n=2;//peak mode value
V0=280;//beam voltage in V
I0=0.022;//beam current in A
Vs=30;//signal voltage in V
J1=1.25;//bessel coefficient for n=2

//CALCULATION
Pdc=V0*I0;//The input power in watts
Pac=((2*Pdc*J1)/((2*n*(%pi))-((%pi)/2)));//The output power in watts
n=(Pac/Pdc)*100;//Efficiency in percentage

//OUTPUT
mprintf('\nThe input power is Pdc=%1.2f watts \nThe output power is Pac=%1.1f watts \nEfficiency is n=%2.2f percentage',Pdc,Pac,n);

//=========================END OF PROGRAM===============================