Wideband coaxial variable attenuators using p-i-n diodes

Using a conventional equivalent circuit for a p-i-n diode, a computer program has been written which permits the compilation of data for use in designing a coaxial wide band variable attenuator. Procedures are outlined leading to design of voltage controlled attenuators whose performance over an octave within 1 to 10 Gc/s compares very favourably with the best commercially available passive attenuators. The procedures have been applied to specific cases and attenuators constructed. Their performance follows closely design data. The compiled data can also be used to design strip line attenuators and levellers.