Waveguide ferrite circulator having conductive side of dielectric disc in contact with ferrite

Claim 2

A microwave ferrite device comprising: means defining a waveguide having a selected standardized height; means including transition means positioned within said waveguide to define a reduced height portion; means including ferrite means defining a microwave ferrite zone within said reduced height portion, the means including ferrite means having a height greater than the reduced height portion so as to extend from regions intermediate the transition means into the transition means; dielectric means positioned on opposite sides of said ferrite means and including thin conductive surfaces in contact with the ferrite means; and means abutting said dielectric means for establishing a magnetic field through said ferrite means.

Claim 3

The microwave ferrite device of claim 1 wherein the dielectric means comprises a pair of elements positioned on opposite sides of the ferrite means.

Claim 4

A microwave ferrite device comprising: waveguide means having a selected standardized wave transmission conduit, said waveguide means comprising a non-metallic body and interior metallic surface plating, and having apertures in said body about a selected axis substantially normal thereto; ferrite means disposed within the wave transmission conduit along the selected axis; dielectric means positioned within the apertures and in abutment with said ferrite means, said dielectric means having thin conductive surfaces contacting said ferrite means; and means abutting said dielectric means for establishing a magnetic field through said ferrite means.

Claim 5

A microwave ferrite device comprising: waveguide means having a selected standardized wave transmission conduit, said waveguide means comprising a non-metallic body and interior metallic surface plating, and having apertures in said body about a selected axis substantially normal thereto; ferrite means disposed within the wave transmission conduit along the selected axis; dielectric means positioned within the apertures and in abutment with said ferrite means, said dielectric means having thin conductive surfaces contacting said ferrite means; and means abutting said dielectric means for establishing a magnetic field through said ferrite means.

Claim 6

The invention as set forth in claim 3 above, wherein said means abutting said dielectric means includes pole piece means at least partially disposed within the apertures of said waveguide means.

Claim 7

The invention as set forth in claim 4 above, including transition means disposed in said wave transmission conduit about tHe axis and providing a reduced height conduit about said ferrite means.

Claim 8

A microwave ferrite device comprising: a dielectric body having an interior channel defining a waveguide, said waveguide including a reduced height waveguide portion and apertures in communication with said reduced height portion; a conductive surface disposed on the interior channel; a pair of pole pieces disposed in said apertures; ferrite means disposed between said pole pieces; and a pair of thin dielectric elements, each interposed between said ferrite means and a different one of said pole pieces, each of said dielectric elements having a planar conductive surface on the side abutting said ferrite means making intimate planar contact with said ferrite means.

Claim 9

A microwave ferrite device comprising: a dielectric body having an interior channel defining a waveguide, said waveguide including a reduced height waveguide portion and apertures in communication with said reduced height portion; a conductive surface disposed on the interior channel; a pair of pole pieces disposed in said apertures; ferrite means disposed between said pole pieces; and a pair of thin dielectric elements, each interposed between said ferrite means and a different one of said pole pieces, each of said dielectric elements having a planar conductive surface on the side abutting said ferrite means making intimate planar contact with said ferrite means.

Claim 10

The microwave ferrite device of claim 6 wherein the conductive surface disposed on the interior channel is gold plating and the planar conductive surfaces on the dielectric elements is silver plating.

Claim 11

The microwave ferrite device of claim 7 wherein said gold plating and silver plating have a thickness no less than about 0.0002 inch and no greater than about 0.0005 inch.

Claim 12

A high speed microwave circulator comprising: a waveguide section having three rectangular waveguide paths, the longitudinal axes of which radiate from an orthogonal central axis at substantially equal angles from each other, said section including top and bottom portions, each having a circular aperture therein concentric with said central axis; upper and lower pole pieces extending through the top and bottom apertures respectively; upper and lower thin dielectric discs abutting the upper and lower pole pieces respectively, each of said discs including a thin conducting surface opposite the abutting surface; upper and lower triangular transition plates disposed within the waveguide section with a broad base surface adjacent the top and bottom respectively and an interior step section, each broad base surface having a circular recess therein receiving a different pole piece and disc with the thin conducting surface being bonded to the transition plate, and each interior step section having a triangular recess therein communicating with the circular recess; upper and lower triangular ferrite elements having a terminal end disposed within the triangular recess of an upper and lower transition plate respectively abutting and bonded to the thin conductive surface therein; and a dielectric element disposed between said upper and lower ferrite elements.

Claim 13

A high speed microwave circulator comprising: a waveguide section having three rectangular waveguide paths, the longitudinal axes of which radiate from an orthogonal central axis at substantially equal angles from each other, said section including top and bottom portions, each having a circular aperture therein concentric with said central axis; upper and lower pole pieces extending through the top and bottom apertures respectively; upper and lower thin dielectric discs abutting the upper and lower pole pieces respectively, each of said discs including a thin conducting surface opposite the abutting surface; upper and lower triangular transition plates disposed within the waveguide section with a broad base surface adjacent the top and bottom respectively and an interior step section, each broad base surface having a circular recess therein receiving a different pole piece and disc with the thin conducting surface being bonded to the transition plate, and each interior step section having a triangular recess therein communicating with the circular recess; upper and lower triangular ferrite elements having a terminal end disposed within the triangular recess of an upper and lower transition plate respectively abutting and bonded to the thin conductive surface therein; and a dielectric element disposed between said upper and lower ferrite elements.

Claim 14

The microwave device of claim 9 further comprising means for inducing a rapidly changeable magnetic field between said upper and lower pole pieces.

Claim 15

A high switching rate microwave circulator comprising: a dielectric waveguide body with interior waveguide defining surfaces of conductive material and including top and bottom portions, each having an aperture therein about a central axis; upper and lower transition means disposed within the waveguide section about said central axis, said means each including a central aperture about said central axis; upper and lower pole piece elements, each extending through a different one of the waveguide body apertures and into the central aperture of said transition means; upper and lower dielectric discs having one broad surface abutting the upper and lower pole piece elements respectively and a thin conductive surface opposite the abutting surface; and upper and lower ferrite elements partly within the apertures in the upper and lower transition means and abutting the upper and lower conductive surfaces of said discs respectively.

Claim 16

A high switching rate microwave circulator comprising: a dielectric waveguide body with interior waveguide defining surfaces of conductive material and including top and bottom portions, each having an aperture therein about a central axis; upper and lower transition means disposed within the waveguide section about said central axis, said means each including a central aperture about said central axis; upper and lower pole piece elements, each extending through a different one of the waveguide body apertures and into the central aperture of said transition means; upper and lower dielectric discs having one broad surface abutting the upper and lower pole piece elements respectively and a thin conductive surface opposite the abutting surface; and upper and lower ferrite elements partly within the apertures in the upper and lower transition means and abutting the upper and lower conductive surfaces of said discs respectively.

Claim 17

The circulator of claim 11 wherein said discs are approximately 0.010 inches in thickness and the thin conductive surfaces are approximately 0.0002 to 0.0005 inches in thickness, and including in addition electromagnet means coupled to said upper and lower pole pieces, and means for switching said electromagnet means rapiDly between two different magnetization levels.

Claim 18

The invention as set forth in claim 12, wherein said pole piece elements comprise ferrite material and wherein in addition a dielectric element is disposed between said ferrite elements.

Claim 19

The circulator of claim 12 wherein said circulator comprises a three port device, wherein said transition means comprises a pair of double step triangular elements, and wherein said ferrite elements are triangular in shape.

Claim 20

The invention as set forth in claim 14, wherein said transition elements define an interior reduced height section and the conductive surfaces of said discs define a section of intermediate height between the waveguide surfaces and said reduced height section, and wherein said transition elements and said waveguide body are of fiber reinforced plastic.

Claim 21

The invention as set forth in claim 15, wherein said fiber reinforced plastic comprises relatively short length glass fibers in a diallyl phthalate matrix.

Claim 22

The invention as set forth in claim 16 above, wherein said diallyl phthalate is diallyl iso-phthalate and wherein said glass fibers are about one-fourth inch in length and about 0.010 to 0.015 inches in diameter.

Claim 23

A microwave ferrite device comprising: wave transmission means comprising a non-metallic, hollow body having a thin interior metallic coating defining wave conducting surfaces and at least one aperture therein; dielectric means disposed within the aperture and having a relatively flat, conductive surface; ferrite means disposed within the hollow interior of the body and extending into the aperture and into contact with the conductive surface of the dielectric means; and means for magnetizing the ferrite means in a selected direction.

Claim 24

A microwave ferrite device comprising: wave transmission means comprising a non-metallic, hollow body having a thin interior metallic coating defining wave conducting surfaces and at least one aperture therein; dielectric means disposed within the aperture and having a relatively flat, conductive surface; ferrite means disposed within the hollow interior of the body and extending into the aperture and into contact with the conductive surface of the dielectric means; and means for magnetizing the ferrite means in a selected direction.

Claim 25

The microwave ferrite device of claim 18, wherein the at least one aperture is generally circular in shape, the dielectric means comprises at least one disc of dielectric material having one side thereof coated with a conductive material to define the conductive surface and mounted generally concentrically within the aperture, and the ferrite means comprises at least one disc of ferrite material having one side thereof disposed in contact with the conductive surface of the dielectric disc.

Claim 26

The microwave ferrite device of claim 18, wherein the hollow body has a pair of apertures therein on opposite sides of the hollow interior, the dielectric means comprises a pair of discs of dielectric material, each having one side thereof coated with a conductive material to define the conductive surface and disposed within a different one of the apertures, and the ferrite means comprises a pair of discs of ferrite material, each of which has one side thereof disposed in contact with the conductive surface of a different one of the dielectric discs.