Traveling wave slot antenna and method of making same
AssigneeComposite Optics, Inc.
InventorMark E. Bonebright
Life of this patent
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Abstract
A low profile non-resonant traveling wave slot antenna operating over broad frequency bands is in the form of a multiple layer circuit, which includes a generally planar slotted conductor sheet having an open smoothly curved tapered planar slot therein and a three-dimensionally smoothly curved stripline conductor sheet having an elongated stem portion electrically connected at its distal end to a feed point on top of the slotted conductor sheet and extending downwardly through the slot therein and terminating in an enlarged smoothly tapered portion to transition the characteristic impedance between the feed point and an aperture impedance matched to free space.
Claims15
A low profile traveling wave slot antenna comprising:
- feed point connector means for conveying broad band width electrical signals;
- a generally planar slotted conductor sheet having an open smoothly curved tapered planar slot therein and being connected electrically to said feed point means;
- a three-dimensionally smoothly curved stripline conductor sheet having an elongated stem portion electrically connected at its distal end to said feed point means on top of said slotted conductor sheet and extending downwardly through said slot and terminating in an enlarged smoothly tapered portion to provide at its free distal end a signal radiating or receiving aperture;
- and
- a generally planar imperforate top conductor plate extending generally parallel to said slotted conductor sheet to cooperate with said slotted sheet and said stripline curved conductor sheet to provide a series of continuous traveling wave sections having continuously and progressively increasing characteristic impedance from said connector means to said aperture.
A method of making a low profile traveling wave slot antenna, comprising:
- using a generally planar slotted conductor sheet having an open smoothly curved tapered planar slot therein;
- connecting electrically to a feed point connector means to the conductor sheet;
- using a three-dimensionally smoothly curved stripline conductor sheet having an elongated stem portion;
- connecting electrically at its distal end to said feed point connector means on top of said slotted conductor sheet;
- extending said stripline conductor sheet downwardly through said slot and terminating in an enlarged smoothly tapered portion to provide at its free distal end a signal radiating or receiving aperture;
- and
- positioning a generally planar imperforate top conductor plate extending generally parallel to said slotted conductor sheet to cooperate with said slotted sheet and said curved stripline conductor sheet to provide a series of continuous traveling wave sections having continuously and progressively increasing characteristic impedance from said connector means to said aperture.
Dependencies are inferred from the claim text.