Abstract: A transmission switch includes a dielectric substrate; a conductive ground layer disposed over an upper surface of the dielectric substrate, wherein the conductive ground layer comprises a first ground section and a second ground section separated from the first ground section; a tunable dielectric layer disposed over the conductive ground layer, wherein the tunable dielectric layer has a first dielectric constant at a first DC voltage and a second dielectric constant at a second DC voltage; and a conductive signal layer disposed over the tunable dielectric layer, wherein the conductive signal layer comprises a first signal section, a second signal section, and an impedance-matching section connecting the first signal section and the second signal section.

Abstract: A switchable radiator includes a dielectric substrate, a first conductive layer having a slot disposed over an upper surface of the dielectric substrate, a tunable dielectric layer disposed over the first conductive layer, and a second conductive layer disposed over the tunable dielectric layer. The tunable dielectric layer has a first dielectric constant at a first DC voltage and a second dielectric constant at a second DC voltage. The second conductive layer includes a first signal section, a second signal section, and an impedance-matching section connecting the first signal section and the second signal section. The operation method of the switchable radiator includes applying a first DC voltage to the tunable dielectric layer to enable the switchable radiator to radiate energy through the slot and applying a second DC voltage to the tunable dielectric layer to disable the switchable radiator from radiating energy through the slot.

Abstract: A transmission switch includes a dielectric substrate; a conductive ground layer disposed over an upper surface of the dielectric substrate, wherein the conductive ground layer comprises a first ground section and a second ground section separated from the first ground section; a tunable dielectric layer disposed over the conductive ground layer, wherein the tunable dielectric layer has a first dielectric constant at a first DC voltage and a second dielectric constant at a second DC voltage; and a conductive signal layer disposed over the tunable dielectric layer, wherein the conductive signal layer comprises a first signal section, a second signal section, and an impedance-matching section connecting the first signal section and the second signal section.

Abstract: A switchable radiator includes a dielectric substrate, a first conductive layer having a slot disposed over an upper surface of the dielectric substrate, a tunable dielectric layer disposed over the first conductive layer, and a second conductive layer disposed over the tunable dielectric layer. The tunable dielectric layer has a first dielectric constant at a first DC voltage and a second dielectric constant at a second DC voltage. The second conductive layer includes a first signal section, a second signal section, and an impedance-matching section connecting the first signal section and the second signal section. The operation method of the switchable radiator includes applying a first DC voltage to the tunable dielectric layer to enable the switchable radiator to radiate energy through the slot and applying a second DC voltage to the tunable dielectric layer to disable the switchable radiator from radiating energy through the slot.

Abstract: A laminated waveguide diplexer includes an upper conductive layer having a first slot and a second slot; a first line crossing over the first slot; a first shielding conductor disposed over the first line; a plurality of first conductive pillars connecting the upper conductive layer and the first shielding conductor; a second line crossing over the second slot; a second shielding conductor disposed over the second line; and a plurality of second conductive pillars connecting the upper conductive layer and the second shielding conductor.

Abstract: A laminated waveguide diplexer includes a first laminated waveguide, a second laminated waveguide, and a coupling metal connecting the first and second laminated waveguides. The first laminated waveguide has a first upper conductor with a first slot, and the second laminated waveguide has a second upper conductor with a second slot. The coupling metal includes a first line crossing over the first slot and a second line crossing over the second slot. In addition, the laminated waveguide diplexer further includes a first via connecting the first upper conductor and the first line, and a second via connecting the second upper conductor and the second line. The first and second vias are adjacent to the first and second slots, respectively, such that the first and second lines are short stubs for respective radio frequency signals propagating thereon.

Abstract: A laminated waveguide diplexer includes a first laminated waveguide, a second laminated waveguide, and a coupling metal connecting the first and second laminated waveguides. The first laminated waveguide has a first upper conductor with a first slot, and the second laminated waveguide has a second upper conductor with a second slot. The coupling metal includes a first line crossing over the first slot and a second line crossing over the second slot. In addition, the laminated waveguide diplexer further includes a first via connecting the first upper conductor and the first line, and a second via connecting the second upper conductor and the second line. The first and second vias are adjacent to the first and second slots, respectively, such that the first and second lines are short stubs for respective radio frequency signals propagating thereon.

Abstract: A laminated waveguide diplexer includes an upper conductive layer having a first slot and a second slot; a first line crossing over the first slot; a first shielding conductor disposed over the first line; a plurality of first conductive pillars connecting the upper conductive layer and the first shielding conductor; a second line crossing over the second slot; a second shielding conductor disposed over the second line; and a plurality of second conductive pillars connecting the upper conductive layer and the second shielding conductor.