Frequency and bandwidth of H plane TEM junction circulator

The H plane stripline circulator consists of a ferrite disc in contact with air or some other dielectric on either side of the TEM line. The purpose of the paper is to give some experimental results which have been obtained with such a device. These results include the bandwidth and operating frequency of the device as a function of the ferrite filling factor. An approximate theory of the device is also included. The method used in the paper consists of replacing the inhomogeneous line by a homogeneous one on the assumption of TEM propagation.