Hybrid Circuit Containing Gyrators

The length of each side of a simple-loop hybrid ring, a reverse phase hybrid circuit, and that of a Rat-Race circuit were chosen a quarter wavelength at the center frequency f_0 or its odd multiple length. But if a gyrator is connected with 2l line in cascade, it is able to be used for an element of a hybrid circuit, and the possible region of the construction of a hybrid circuit is very wide. In the extreme case, a hybrid ring which is composed of only four gyrators displays excellent operation