The design and construction of a comparison impedance bridge for frequencies of 40–270 Mc/s
W.C. Weatherley · Proceedings of the IEE - Part III Radio and Communication Engineering · 1949
This paper describes two types of impedance bridge, one for measuring “unbalanced” and the other for measuring “balanced” impedances to earth.The frequency range is approximately ± 20% of the working midfrequency, and the bridges here described operate at a mid-frequency of 50–250 Mc/s.