c ( r / a ) } = a 2 π J 1 ( 2 π a p ) π a p , (3) Where &Jai_unknown_entity_euclidsymbol_F072; is a radial coordinate in the plane of the observation and J 1. is the first order Besselfunction of the first kind. The amplitude distribution in the
power and D s ( τ ) is the geometric function given by the relation
in which L 0 is the modified Besselfunction and l , k are the dimension of the resistive pattern.
To record the potential difference variations, which normally are