Claims
- 1. A microwave device, which comprises:
- a high resistivity dielectric waveguide including means for coupling millimeter or sub-millimeter wave microwave energy from an external source into the waveguide;
- a self-oscillating device positioned in said dielectric waveguide; and
- a plurality of high dielectric-constant resonators, comprising ferrite and biased to a subsidiary resonance state, interposed between said energy coupling means and said self-oscillating device for limiting the power fed to said self-oscillating device.
- 2. The device according to claim 1 wherein each resonator includes a ferrite member of high uniaxial anisotropy with the easy access of magnetism aligned perpendicular to the direction of propagation in the waveguide.
- 3. The device according to claim 1 further comprising:
- means for establishing a DC magnetic field in said waveguide perpendicular to the direction of propagation in the waveguide.
- 4. The device according to claim 1 wherein said resonator is comprised of rutile.
- 5. The device according to claim 1 wherein said resonator is comprised of strontium titanate.
- 6. The device according to claim 1 wherein said waveguide is comprised of high resistivity silicon.
- 7. The device according to claim 1 wherein said waveguide is configured as an elongated rectangular member of high resistivity dielectric material and said energy coupling means comprises a tapered extremity in said elongated rectangular member.
- 8. The device according to claim 1 wherein said resonators comprise a cylindrical recess in said waveguide filled with a material of high dielectric constant.
- 9. The device according to claim 2 wherein said ferrite member comprises a ferrite bead.
- 10. The device according to claim 2 wherein said ferrite member comprises barium ferrite.
- 11. The device according to claim 3 wherein said magnetic field establishing means comprises first and second rare-earth permanent magnets respectively positioned on opposite sides of said waveguide.
- 12. The device according to claim 2 wherein the magnetic properties of said ferrite members are selected such that said device functions to limit the power of one or more specified frequencies over a wide band of frequencies.
- 13. A microwave device which comprises:
- a high resistivity dielectric waveguide including means for coupling millimeter or sub-millimeter wave microwave energy from an external source into the waveguide;
- a self-oscillating device positioned in said dielectric waveguide; and
- at least one slab of ferrite material, said ferrite material being biased to a subsidiary resonance state, positioned in said dielectric waveguide intermediate said energy coupling means and said self-oscillating device.
- 14. The device according to claim 13 wherein said ferrite material comprises barium ferrite.
GOVERNMENT LICENSE
The invention described herein may be manufactured, used and licensed by or for the Government, for Governmental purposes without the payment to me of any royalties thereon.
US Referenced Citations (6)