#!/usr/bin/env python3

import math as m

R   =  50      # Ω
P   =   5      # W
f   = 435e6    # Hz
If  =  10e-3   # A
tau =   0.4e-6 # s

Irf=m.sqrt(P/R)     # RF current
Qreq=Irf/(2*m.pi*f) # Required charge per cycle for RF current
Qs=If*tau           # Stored charge in PIN diode

print(f"RF current: {Irf:.3g} A")
print(f"Required charge (Q_r): {Qreq:.3g} As")
print(f"Stored charge (Q_s): {Qs:.3g} As")

print(f"Q_s = {Qs/Qreq:.3g} ⋅ Q_r")