The multiplier consists of schottky diodes which are chosen due to
their low forward voltage for operation. This is important due to the
very low power derived from the antenna. The circuit also uses
ceramic capacitors. The value of capacitance controls the ripple
voltage of the DC output. The relationship between ripple voltage and
capacitance is that they are inversely proportional therefore to
minimize ripple 100nF capacitors are chosen. Figure 4 shows the
circuit design in Multisim.