Methodology to develop a low-loss dual-band stripline circulator

A design procedure of a dual-band stripline circulator has been developed by studying resonant modes within ferrite disks. Electromagnetic (EM) analyses have shown that it is possible to couple simultaneously both fundamental and upper modes in order to obtain a circulation's operation at two distinct frequency bands. Detailed EM simulations and measurement are presented and applications related to such a dual-band device are discussed.