Patent ID: 11946878
Assignee: UNIVERSITY OF MANITOBA
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 17:
18. A method of providing a unidirectional signal transmission for microwaves comprising:
providing a microwave structure configured to transmit the microwaves between two ports and having a resonant frequency;
providing a magnetic source, which is arranged to provide an electromagnetic field and to have a resonant frequency distinct from the resonant frequency of the microwave structure, adjacent the microwave structure such that the electromagnetic field of the magnetic source interacts with electromagnetic fields of the microwaves transmitted through the microwave structure so as to form a set of hybridized resonant frequencies at which zero damping exists in the microwave structure, one of the set of hybridized resonant frequencies being a real eigenvalue corresponding to a frequency providing substantially unidirectional propagation from one of the ports to the other port;
applying an input microwave signal of an input frequency at a selected one of the two ports; and
arranging the magnetic source at a prescribed position relative to the microwave structure at which the eigenvalue which corresponds to transmission from the selected port to the other one of the two ports becomes a pure real value which matches the frequency of the input signal, so that the input microwave signal is transmitted from the selected port to the other port substantially without transmission of any signals in a reverse direction.