
553Microwave Diodes
As an ac (RF) signal is superimposed on dc signal, whenever oscillations
from this diode start most of the power gets reected due to SC at operating
frequency. This reected power will get added to RF signal resulting in its
enhancement. Thus, the total enhanced voltage across diode is the sum of
RF signal and dc bias voltage. If this increased voltage exceeds the threshold
voltage avalanche process begins. There is transition of more electrons and
holes. This is termed as plasma of electrons and holes. Plasma will create a
large potential across the junction, which will oppose the dc potential and
reduce the total volta ...