Low-cost one-dimensional electromagnetic band gap waveguide phase shifter based ESA horn antenna
AssigneeRockwell Collins, Inc.
InventorJames B. West
Life of this patent
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Abstract
A one-dimensional electromagnetic band gap (EBG) waveguide phase shifter electronically scanned array (ESA) horn antenna utilizes a linear array of EBG waveguide phase shifters for scanning and radiating a beam. A linear array feed feeds the linear array of EBG waveguide phase shifters. A horn directs radiation from the linear array of EBG waveguide phase shifters. Each of the EBG waveguide phase shifters is a waveguide with vertical and horizontal sidewalls. EBG devices are located on the vertical waveguide walls to shift phase to scan the beam.
Claims20
A one-dimensional electromagnetic band gap (EBG) waveguide phase shifter electronically scanned array (ESA) horn antenna comprising:
- a linear array of EBG waveguide phase shifters for scanning and radiating a beam;
- a linear array feed to feed the linear array of ERG waveguide phase shifters;
- and
- a horn for shaping radiation from the linear array of EBG waveguide phase shifters.
A one-dimensional electromagnetic band gap (EBG) waveguide phase shifter electronically scanned array (ESA) horn antenna for scanning and radiating a beam comprising:
- the horn for shaping the scanned and radiated beam
- a one-dimensional ESA EBG waveguide phase shifting linear array horn feed for feeding the horn the scanned and radiated beam wherein the one-dimensional ESA EBG waveguide phase shifting linear array horn feed comprises a linear array of EBG waveguide radiating elements;
- and
- a linear array feed for feeding the one-dimensional ESA EBG waveguide phase shifting linear array horn feed.
A one-dimensional electromagnetic band gap (EBG) waveguide phase shifter electronically scanned array (ESA) horn antenna comprising a linear array of EBG waveguide phase shifters for scanning and radiating a beam;
- a linear array feed to feed the linear array of EBG waveguide phase shifters;
- and a horn for directing radiation from the linear array of EBG waveguide phase shifters wherein each of the EBG waveguide phase shifters comprises:
- a waveguide having vertical and horizontal sidewalls;
- and
- EBG devices on the vertical sidewalls wherein the EBG devices on the vertical sidewalls phase shift to scan the beam said EBG devices each comprise:
- a dielectric substrate;
- a plurality of conductive strips periodically located on a surface of the dielectric substrate;
- a ground plane located on a surface of the dielectric substrate opposite the plurality of conductive strips;
- and
- a plurality of reactive devices placed between the conductive strips to vary reactance between the conductive strips thereby varying a surface impedance of the EBG devices to shift a phase.
Dependencies are inferred from the claim text.