Passive microwave receiver-transmitter

Claim 2

A microwave transducer comprising, a microwave resonant cavity, a randomly embossed thin metallic diaphragm closing one face thereof, a conical metallic post extending from one wall of said cavity towards said diaphragm having a sharp tip in close proximity to but spaced from said diaphragm, and means for coupling microwave energy into and out of said microwave resonant cavity.

Claim 3

A microwave transducer comprising, a microwave resonant cavity, a randomly embossed thin metallic diaphragm forming a closure for one wall thereof, a conical metallic post extending from the opposite wall of said cavity towards said diaphragm having a sharp tip in close proximity to but spaced from the underside of said diaphragm, means for acoustically impedance matching said diaphragm, and means for coupling microwave energy into and out of said microwave resonant cavity.

Claim 4

A microwave transducer comprising, a microwave resonant cavity, a randomly embossed thin metallic diaphragm forming a closure for one wall thereof, a conical metallic post extending from the opposite wall of said cavity towards said diaphragm having a sharp tip in close proximity to but spaced from the underside of said diaphragm, means for acoustically impedance matching said diaphragm, and means for coupling microwave energy into and out of said microwave resonant cavity.

Claim 5

A microwave transducer comprising, a waveguide section, a plurality of microwave radiating elements positioned along the length thereof, a microwave resonant cavity positioned internally of said waveguide section, microwave coupling means between said cavity and said waveguide section, said microwave cavity being provided with a randomly embossed thin metallic diaphragm forming a closure for one wall thereof, one face of said diaphragm being exposed to the atmosphere through an aperture formed in the wall of said waveguide section, and a metallic post positioned interiorly of said cavity extending from the wall thereof opposite said diaphragm towards said diaphragm and terminating in a sharp tip positioned in close proximity to but spaced from the underside of said diaphragm.

Claim 6

A microwave transducer comprising, a waveguide section, a plurality of microwave radiating elements positioned along the length thereof, a microwave resonant cavity positioned internally of said waveguide section, microwave coupling means between said cavity and said waveguide section, said microwave cavity being provided with a randomly embossed thin metallic diaphragm forming a closure for one wall thereof, one face of said diaphragm being exposed to the atmosphere through an aperture formed in the wall of said waveguide section, and a metallic post positioned interiorly of said cavity extending from the wall thereof opposite said diaphragm towards said diaphragm and terminating in a sharp tip positioned in close proximity to but spaced from the underside of said diaphragm.

Claim 7

A microwave transducer comprising, a waveguide section, a plurality of microwave radiating elements positioned along the length thereof, a microwave resonant cavity positioned internally of said waveguide section having one face thereof exposed to the atmosphere through an aperture formed in the wall of said waveguide section, microwave coupling means between said cavity and said waveguide section, the exposed face of said cavity being constituted by a randomly embossed thin metallic diaphragm affixed to said cavity, a metallic post positioned interiorly of said cavity extending from the center of the wall thereof opposite said diaphragm towards said diaphragm and terminating in a sharp tip positioned in close proximity to but spaced from the underside of said diaphragm, and means for acoustically impedance matching said diaphragm.

Claim 8

A microwave transducer comprising, a waveguide section, a plurality of microwave radiating elements positioned along the length thereof, a microwave resonant cavity positioned internally of said waveguide section having one face thereof exposed to the atmosphere through an aperture formed in the wall of said waveguide section, microwave coupling means between said cavity and said waveguide section, the exposed face of said cavity being constituted by a randomly embossed thin metallic diaphragm affixed to said cavity, a metallic post positioned interiorly of said cavity extending from the center of the wall thereof opposite said diaphragm towards said diaphragm and terminating in a sharp tip positioned in close proximity to but spaced from the underside of said diaphragm, and means for acoustically impedance matching said diaphragm.

Claim 9

A microwave transducer comprising, a rectangular waveguide section, a plurality of microwave radiating slots positioned along one broad face thereof, a microwave resonant cavity member positioned at one end of said waveguide section internally thereof with one face of said cavity substantially coextensive with said broad face of said waveguide section and exposed to the atmosphere through an aperture in said waveguide wall which encompasses said cavity member, said cavity member being provided with a randomly embossed thin metallic diaphragn affixed to said cavity member and forming the exposed face thereof, a conical metallic post extending centrally of the wall of said cavity opposite said diaphragm in a direction towards said diaphragm and terminating in a sharp tip positioned in close proximity to but spaced from the underside of said diaphragm, and microwave coupling means between said cavity and said waveguide section.

Claim 10

A microwave transducer comprising, a rectangular waveguide section, a plurality of microwave radiating slots positioned along one broad face thereof, a microwave resonant cavity member positioned at one end of said waveguide section internally thereof with one face of said cavity substantially coextensive with said broad face of said waveguide section and exposed to the atmosphere through an aperture in said waveguide wall which encompasses said cavity member, said cavity member being provided with a randomly embossed thin metallic diaphragn affixed to said cavity member and forming the exposed face thereof, a conical metallic post extending centrally of the wall of said cavity opposite said diaphragm in a direction towards said diaphragm and terminating in a sharp tip positioned in close proximity to but spaced from the underside of said diaphragm, and microwave coupling means between said cavity and said waveguide section.

Claim 11

A microwave transducer comprising, a rectangular waveguide section, a plurality of microwave radiating slots positioned along one broad face thereof, a microwave resonant cavity member positioned at one end of said waveguide section extending between the broad fAces thereof with one face of said cavity exposed to the atmosphere through an aperture formed in a broad face of said waveguide section of a size such as to encompass said cavity member, a randomly embossed thin metallic diaphragm affixed to said cavity member and forming the exposed face thereof, a conical metallic post positioned internally and centrally of said cavity member and extending axially of said cavity member in a direction toward said diaphragm, said conical post terminating in a sharp tip positioned in close proximity to but spaced from the underside of said diaphragm, microwave coupling means between said cavity and said waveguide section, and means for acoustically impedance matching said diaphragm.

Claim 12

A microwave transducer comprising, a rectangular waveguide section, a plurality of microwave radiating slots positioned along one broad face thereof, a microwave resonant cavity member positioned at one end of said waveguide section extending between the broad fAces thereof with one face of said cavity exposed to the atmosphere through an aperture formed in a broad face of said waveguide section of a size such as to encompass said cavity member, a randomly embossed thin metallic diaphragm affixed to said cavity member and forming the exposed face thereof, a conical metallic post positioned internally and centrally of said cavity member and extending axially of said cavity member in a direction toward said diaphragm, said conical post terminating in a sharp tip positioned in close proximity to but spaced from the underside of said diaphragm, microwave coupling means between said cavity and said waveguide section, and means for acoustically impedance matching said diaphragm.

Claim 13

A microwave transducer comprising, a rectangular waveguide section, a plurality of microwave radiating slots positioned linearly along one broad face thereof, a cylindrical body member inserted through an aperture in said broad face at one end of said waveguide section, said body member extending between the broad faces of said waveguide section and having one end thereof exposed through said aperture, a cylindrical microwave resonant cavity formed in said body member concentric therewith, a randomly embossed thin metallic diaphragm affixed to said one end of said body member and forming a face of said cavity substantially contiguous with the broad face of said waveguide section, a conical metallic post positioned axially of said cavity and extending in a direction towards said diaphragm, said conical post terminating in a sharp tip positioned in close proximity to but spaced from the underside of said diaphragm, and microwave coupling means between said cavity and said waveguide section.

Claim 14

A microwave transducer comprising, a rectangular waveguide section, a plurality of microwave radiating slots positioned linearly along one broad face thereof, a cylindrical body member inserted through an aperture in said broad face at one end of said waveguide section, said body member extending between the broad faces of said waveguide section and having one end thereof exposed through said aperture, a cylindrical microwave resonant cavity formed in said body member concentric therewith, a randomly embossed thin metallic diaphragm affixed to said one end of said body member and forming a face of said cavity substantially contiguous with the broad face of said waveguide section, a conical metallic post positioned axially of said cavity and extending in a direction towards said diaphragm, said conical post terminating in a sharp tip positioned in close proximity to but spaced from the underside of said diaphragm, and microwave coupling means between said cavity and said waveguide section.

Claim 15

A microwave transducer comprising, a rectangular waveguide section, a plurality of microwave radiating slots positioned linearly along one broad face thereof, a cylindrical body member inserted through an aperture in said broad face at one end of said waveguide section, said body member extending between the broad faces of said waveguide section and having one end thereof exposed through said aperture, a cylindrical microwave resonant cavity formed in said body member concentric therewith, a randomly embossed thin metallic diaphragm affixed to said one end of said body member and forming a face of said cavity substantially contiguous with the broad face of said waveguide section, a conical metallic post positioned axially of said cavity and extending in a direction towards said diaphragm, said conical post terminating in a sharp tip positioned in close proximity to but spaced from the underside of said diaphragm, microwave coupling means between said cavity and said waveguide section, and means for acoustically impedance matching said diaphragm.

Claim 16

A microwave transducer comprising, a rectangular waveguide section, a plurality of microwave radiating slots positioned linearly along one broad face thereof, a cylindrical body member inserted through an aperture in said broad face at one end of said waveguide section, said body member extending between the broad faces of said waveguide section and having one end thereof exposed through said aperture, a cylindrical microwave resonant cavity formed in said body member concentric therewith, a randomly embossed thin metallic diaphragm affixed to said one end of said body member and forming a face of said cavity substantially contiguous with the broad face of said waveguide section, a conical metallic post positioned axially of said cavity and extending in a direction towards said diaphragm, said conical post terminating in a sharp tip positioned in close proximity to but spaced from the underside of said diaphragm, microwave coupling means between said cavity and said waveguide section, and means for acoustically impedance matching said diaphragm.

Claim 17

A microwave transducer comprising, a body member having a microwave resonant cavity formed in one end thereof and extending longitudinally of said body for a portion of the length thereof, a recess extending longitudinally into said body from the other end thereof and terminating short of said cavity whereby a partition extends between said cavity and said recess, a randomly embossed thin metallic diaphragm affixed to said body member adjacent the first mentioned end thereof forming a face of said microwave cavity, a conical metallic post affixed to said partition and extending axially of said microwave cavity towards said diaphragm, said post terminating in a sharp tip positioned in close proximity to but spaced from the underside of said diaphragm, a plurality of apertures formed in said partition of a size to permit air communication between said cavity and said recess but below the cut-off frequency for microwave energy whereby said microwave cavity and said recess together constitute an acoustical impedance match for said diaphragm, air vent means in said diaphragm, and means for coupling microwave energy to said microwave cavity.

Claim 18

A microwave transducer comprising, a body member having a microwave resonant cavity formed in one end thereof and extending longitudinally of said body for a portion of the length thereof, a recess extending longitudinally into said body from the other end thereof and terminating short of said cavity whereby a partition extends between said cavity and said recess, a randomly embossed thin metallic diaphragm affixed to said body member adjacent the first mentioned end thereof forming a face of said microwave cavity, a conical metallic post affixed to said partition and extending axially of said microwave cavity towards said diaphragm, said post terminating in a sharp tip positioned in close proximity to but spaced from the underside of said diaphragm, a plurality of apertures formed in said partition of a size to permit air communication between said cavity and said recess but below the cut-off frequency for microwave energy whereby said microwave cavity and said recess together constitute an acoustical impedance match for said diaphragm, air vent means in said diaphragm, and means for coupling microwave energy to said microwave cavity.

Claim 19

A microwave transducer as set forth in claim 9 in which said body member is coNtained in a rectangular waveguide section between the broad faces thereof with the diaphragm exposed to the atmosphere, and said waveguide section is provided with microwave radiating elements along the length thereof.

Claim 20

A microwave transducer comprising, a cylindrical body member having a cylindrical microwave resonant cavity formed in one end thereof concentric therewith and extending longitudinally of said body member for a fraction of the length thereof, a cylindrical recess formed in the other end of said body member concentric therewith and extending longitudinally of said body for such fraction thereof as to provide a partition wall between said cavity and said recess, a plate member closing the face of said recess remote from said partition, a randomly embossed thin metallic diaphragm affixed to said body forming an end closure for said resonant cavity, a conical metallic post extending from said partition axially of said cavity towards said diaphragm, said post terminating in a sharp tip positioned in close proximity to but spaced from the underside of said diaphragm, a plurality of communicating apertures in said partition having dimensions less than the cut-off frequency for which the resonant cavity is designed whereby said microwave cavity together with said recess constitute an acoustical impedance matching chamber but microwave energy is precluded from entering said recess, an air vent in said diaphragm, and means impervious to air for coupling microwave energy to said cavity.

Claim 21

A microwave transducer comprising, a cylindrical body member having a cylindrical microwave resonant cavity formed in one end thereof concentric therewith and extending longitudinally of said body member for a fraction of the length thereof, a cylindrical recess formed in the other end of said body member concentric therewith and extending longitudinally of said body for such fraction thereof as to provide a partition wall between said cavity and said recess, a plate member closing the face of said recess remote from said partition, a randomly embossed thin metallic diaphragm affixed to said body forming an end closure for said resonant cavity, a conical metallic post extending from said partition axially of said cavity towards said diaphragm, said post terminating in a sharp tip positioned in close proximity to but spaced from the underside of said diaphragm, a plurality of communicating apertures in said partition having dimensions less than the cut-off frequency for which the resonant cavity is designed whereby said microwave cavity together with said recess constitute an acoustical impedance matching chamber but microwave energy is precluded from entering said recess, an air vent in said diaphragm, and means impervious to air for coupling microwave energy to said cavity.

Claim 22

A microwave transducer as set forth in claim 11 in which said body member is contained in a rectangular waveguide section between the broad faces thereof with the diaphragm exposed to the atmosphere, and said waveguide section is provided with microwave radiating elements along the length thereof.

Claim 23

A microwave transducer comprising, a rectangular waveguide section, a plurality of radiating slots positioned along one broad face thereof, said broad face being recessed over the area occupied by said slots, a dielectric membrane covering said recessed area, a microwave resonant cavity member positioned at one end of said waveguide section and extending between the broad sides thereof with one face thereof exposed to the atmosphere through an aperture in one of said broad sides encompassing said cavity member, a randomly embossed thin metallic diaphragm affixed to said cavity and forming the face thereof exposed to the atmosphere, a metallic post extending from the wall of said cavity opposite said diaphragm in a direction towards said diaphragm, said post terminating in a sharp tip positioned in close proximity to but spaced from said diaphragm, microwave coupling means between said waveguide section and said cavity, and a closure plate for the end of said waveguide section opposite the end to which said cavity is affixed, said closure plate being perforated for acoustical and air transmission therethrough.

Claim 24

A microwave transducer comprising, a rectangular waveguide section, a plurality of radiating slots positioned along one broad face thereof, said broad face being recessed over the area occupied by said slots, a dielectric membrane covering said recessed area, a microwave resonant cavity member positioned at one end of said waveguide section and extending between the broad sides thereof with one face thereof exposed to the atmosphere through an aperture in one of said broad sides encompassing said cavity member, a randomly embossed thin metallic diaphragm affixed to said cavity and forming the face thereof exposed to the atmosphere, a metallic post extending from the wall of said cavity opposite said diaphragm in a direction towards said diaphragm, said post terminating in a sharp tip positioned in close proximity to but spaced from said diaphragm, microwave coupling means between said waveguide section and said cavity, and a closure plate for the end of said waveguide section opposite the end to which said cavity is affixed, said closure plate being perforated for acoustical and air transmission therethrough.

Claim 25

A microwave transducer comprising, a rectangular waveguide section, a plurality of shunt radiating slots positioned linearly along one broad face thereof, said broad face being recessed over the area occupied by said slots, a dielectric membrane affixed to said waveguide section covering said recessed area, a cylindrical body member set into said broad face at one end of said waveguide section with its surface substantially flush therewith and its axial length extending between the broad faces of said waveguide section, a resonant microwave cavity formed in said body member concentric therewith, a randomly embossed thin metallic diaphragm affixed to said body member and forming a closure for said cavity at the end thereof adjacent said one broad face, a conical metallic post positioned axially of said cavity terminating in a sharp tip positioned in close proximity to but spaced from said diaphragm, microwave coupling means between said waveguide section and said cavity, and a closure plate affixed to the end of said waveguide section opposite the end to which saiD cavity is affixed, said closure plate being perforated for acoustical and air transmission therethrough.

Claim 26

A microwave transducer comprising, a rectangular waveguide section, a plurality of shunt radiating slots positioned linearly along one broad face thereof, said broad face being recessed over the area occupied by said slots, a dielectric membrane affixed to said waveguide section covering said recessed area, a cylindrical body member set into said broad face at one end of said waveguide section with its surface substantially flush therewith and its axial length extending between the broad faces of said waveguide section, a resonant microwave cavity formed in said body member concentric therewith, a randomly embossed thin metallic diaphragm affixed to said body member and forming a closure for said cavity at the end thereof adjacent said one broad face, a conical metallic post positioned axially of said cavity terminating in a sharp tip positioned in close proximity to but spaced from said diaphragm, microwave coupling means between said waveguide section and said cavity, and a closure plate affixed to the end of said waveguide section opposite the end to which saiD cavity is affixed, said closure plate being perforated for acoustical and air transmission therethrough.