Hall-effect gyrators, isolators, and circulators with high efficiency

The realization of passive non-reciprocal Hall-effect transmission devices for frequencies up to 10 Mc is described. To increase the efficiency of the classic Hall generator, the author uses a Hall-element network with several control and load circuits. This design is discussed theoretically and the technological methods for making such plates are explained. Hall gyrators were constructed with an efficiency of η = 0.56. Hall isolators gave an efficiency up to η = 0.83 with a reverse loss between 50 and 85 db, and the Hall circulator attained an efficiency of η = 0.605 with a reverse loss of about 40 db. The bandwidth of transmission, within a drop of not more than 1 db, is about two powers of ten in the frequency range between 10 kc and 10 Mc.