One-dimensional and two-dimensional electronically scanned slotted waveguide antennas using tunable band gap surfaces

An electronically scanned slotted waveguide antenna for radiating an RF signal as a scannable beam, said antenna comprising:

• a plurality of radiation waveguides positioned in an array and having radiation slots that radiate the scannable beam;
• and
• a feed waveguide coupled to the plurality of radiation waveguides, wherein said feed waveguide feeds the RF signal to said radiation waveguides through coupling slots, said feed waveguide comprising sidewalls with substrate slats having discrete tunable electromagnetic crystal (EMXT) devices thereon, said EMXT devices varying a phase of the RF signal in said feed waveguide to scan the radiated beam in a first dimension, wherein each one of said substrate slats further comprise:
• a substrate for mechanical mounting of the EMXT devices;
• interconnect traces for interconnecting the EMXT devices and an external control;
• a dielectric layer over the interconnect traces for providing insulation;
• and
• a metal shield layer over the interconnect traces for providing an RF shield.

An electronically scanned slotted waveguide antenna for radiating an RF signal as a scannable beam, said antenna comprising:

• a plurality of radiation waveguides positioned in an array and having radiation slots that radiate the scannable beam;
• and
• a feed waveguide coupled to the plurality of radiation waveguides wherein said feed waveguide feeds the RF signal to said radiation waveguides through coupling slots, said feed waveguide comprising:
• sidewalls having tunable electromagnetic crystal (EMXT) devices thereon, said EMXT devices for varying a phase of the RF signal in said feed waveguide to scan the radiated beam in a first dimension;
• and
• substrate slats having said EMXT devices mounted thereon wherein each one of said substrate slats further comprise a substrate for mechanical mounting of the EMXT devices, interconnect traces for interconnecting the EMXT devices and an external control;
• a dielectric layer over the interconnect traces for providing insulation;
• and a metal shield layer over the interconnect traces for providing an RF shield.

An electronically scanned slotted waveguide antenna for radiating an RF signal as a scannable beam, said antenna comprising:

• a plurality of radiation waveguides positioned in an array and having radiation slots that radiate the scannable beam, wherein said radiation waveguides further comprise sidewalls with substrate slats having discrete radiation waveguide tunable electromagnetic crystal (EMXT) devices thereon, said discrete radiation waveguide tunable EMXT devices varying a phase of the RF signal in said radiation waveguide to scan the radiated beam in a second dimension, wherein each one of said substrate slats further comprise:
• a substrate for mechanical mounting of the discrete radiation waveguide tunable EMXT devices;
• interconnect traces for interconnecting the discrete radiation waveguide tunable EMXT devices and an external control;
• a dielectric layer over the interconnect traces for providing insulation;
• and
• a metal shield layer over the interconnect traces for providing an RF shield;
• and
• a feed waveguide coupled to the plurality of radiation waveguides, wherein said feed waveguide feeds the RF signal to said radiation waveguides through coupling slots, said feed waveguide comprising sidewalls with substrate slats having discrete tunable EMXT devices thereon, said EMXT devices varying a phase of the RF signal in said feed waveguide to scan the radiated beam in a first dimension.