Abstract:
Tuned Electromagnetic Bandgap (EBG)devices (10, 30), and a method for making and tuning tuned EBG devices (10, 30) are provided. The method includes the steps of providing first and second overlapping substrates (32, 32a), placing magnetically alignable conductive material (36) between the substrates (32, 32a), and applying a magnetic field (44, 45) in the vicinity of the magnetically alignable conductive material (36) to align at least some of the material into conductive vias (46, 47). The method further includes the steps of physically altering via characteristics of EBG devices (10, 30) to tune the bandpass and resonant frequencies of the EBG devices (10, 30).
Abstract:
Tuned Electromagnetic Bandgap (EBG)devices (10, 30), and a method for making and tuning tuned EBG devices (10, 30) are provided. The method includes the steps of providing first and second overlapping substrates (32, 32a), placing magnetically alignable conductive material (36) between the substrates (32, 32a), and applying a magnetic field (44, 45) in the vicinity of the magnetically alignable conductive material (36) to align at least some of the material into conductive vias (46, 47). The method further includes the steps of physically altering via characteristics of EBG devices (10, 30) to tune the bandpass and resonant frequencies of the EBG devices (10, 30).
Abstract:
A microwave communication package (10) is constructed on an electrically conducting base plate (12) having a first side (14) defining a base plate cavity (16), with an antenna apparatus (40) mounted on an opposite, second side (18). A dielectric substrate (20) on the first side of the base plate covers the base plate cavity; and sealing apparatus (72) contacting the dielectric substrate and the base plate completely around the base plate cavity hermetically seals the cavity. Circuitry (30, 32) mounted on a surface of the substrate within the base plate cavity includes one or more microstrip lines (54) communicating components (30) to one or more waveguides comprising openings (50) extending through the base plate; and the waveguides are coupled at their opposite ends to the antenna apparatus.
Abstract:
A high-frequency Electromagnetic Bandgap (EBG) motion sensor device (70), and a method (100) for making such a device (70) are provided. The device (70) includes a substantially planar substrate (72) including multiple conducting vias (76) forming a periodic lattice in the substrate (72). The vias (76) extend from the lower surface of the substrate (72) to the upper surface of the substrate (72). The device (70) also includes a movable defect (83) positioned in the periodic lattice. The movable defect (83) is configured to move relative to the plurality of vias (76). A resonant frequency of the EBG motion sensor device (70) varies based on movement of the movable defect (83).
Abstract:
A microwave communication package (10) is constructed on an electrically conducting base plate (12) having a first side (14) defining a base plate cavity (16), with an antenna apparatus (40) mounted on an opposite, second side (18). A dielectric substrate (20) on the first side of the base plate covers the base plate cavity; and sealing apparatus (72) contacting the dielectric substrate and the base plate completely around the base plate cavity hermetically seals the cavity. Circuitry (30, 32) mounted on a surface of the substrate within the base plate cavity includes one or more microstrip lines (54) communicating components (30) to one or more waveguides comprising openings (50) extending through the base plate; and the waveguides are coupled at their opposite ends to the antenna apparatus.
Abstract:
A high-frequency Electromagnetic Bandgap (EBG) device (70,90), and a method (100) for making the device are provided. The device (70,90) includes a first substrate (72) including multiple conducting vias (74) forming a periodic lattice. The vias (74) ofthe first substrate (72) extend from the lower surface ofthe first substrate (72) to the upper surface of the first substrate (72). The device (70,90) also includes a second substrate (76) having multiple conducting vias (78) forming a periodic lattice. The vias (78) ofthe second substrate (76) extend from the lower surface of the second substrate (76) to the upper surface of the second substrate (76). The second substrate (76) is positioned adjacent to, and overlapping, the first substrate (72), such that the lower surface of the second substrate (76) is in contact with the upper surface of the first substrate (72), and such that a plurality of vias (78) of the second substrate (76) are in contact with a corresponding plurality of vias (74) of the first substrate (72).