Wave transmission lines and networks – Plural channel systems – Nonreciprocal gyromagnetic type
Reexamination Certificate
2008-04-22
2008-04-22
Jones, Stephen E. (Department: 2817)
Wave transmission lines and networks
Plural channel systems
Nonreciprocal gyromagnetic type
C333S024200
Reexamination Certificate
active
11279168
ABSTRACT:
A directional R.F. circulator directs radio frequency signals without an external biasing magnetic field. Layers of ferromagnetic materials and insulating materials form a laminated nano-structure. The layers are selected to have a thickness smaller than the wavelength of the radio frequency signals, and smaller than the skin depth of the signals in the material. The ferromagnetic materials and insulators form a resonant cavity having a resonant frequency near the operating frequency for the signal. A plurality of connectors are located around the periphery of the laminated ferromagnetic material to provide input and output ports for the device. This circulator is compatible with semiconductor thin-film processing, and may be integrated onto a monolithic integrated circuit. A method of forming a directional R.F. circulator is also disclosed.
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International Search Report for PCT International Application No. PCT/US06/13472 mailed Sep. 12, 2007.
Jones Stephen E.
RatnerPrestia
University of Delaware
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