Abstract: Waveguides and related assemblies for use, for example, in RADAR sensor assemblies and the like. In some embodiments, the waveguide may comprise a conductive member having a first plurality of posts arranged in a first row thereon. A second plurality of posts may be arranged in a second row on the conductive member to define a waveguide between the first plurality of posts and the second plurality of posts. One or more platforms may be provided to project at least a subset of the first plurality of posts and the second plurality of posts beyond at least a portion of the conductive member adjacent to the one or more platforms. A second conductive member, such as a cover, may be coupled to the conductive member such that the first and second pluralities of posts extend between the conductive member and the cover.

Abstract: Waveguide and/or antenna assemblies for RADAR sensor assemblies/modules, particularly those for vehicles. In some embodiments, the assembly may comprise a waveguide block defining one or more waveguides, each waveguide defined by a waveguide groove. In some embodiments, at least a portion of at least one waveguide groove is non-straight, such as meandering/oscillating back and forth. An antenna structure may be operably coupled with the one or more waveguides, which structure may comprise an array of one or more slots. In some embodiments, a single, elongated slot of the one or more slots may extend along an axis of each waveguide groove for delivering electromagnetic radiation from a corresponding waveguide of the one or more waveguides therethrough.

Abstract: Antenna and/or waveguide assemblies for vehicles, such as RADAR sensor antenna assemblies, along with associated signal confinement structures. In some embodiments, the assembly may comprise an antenna block defining one or more waveguides. A conductive layer may be coupled to the antenna block to form, at least in part, a wall of the waveguide. The assembly may comprise one or more periodic structures that may be operably coupled to the waveguide, each of which may comprise a first elongated opening and a first series of repeated slots extending at least substantially transverse to the first elongated opening, wherein each of the first series of repeated slots is spaced apart from an adjacent slot in the first series of repeated slots along the first elongated opening.

Abstract: Waveguides and related assemblies for use, for example, in RADAR sensor assemblies and the like. In some embodiments, the waveguide may comprise a conductive member having a first plurality of posts arranged in a first row thereon. A second plurality of posts may be arranged in a second row on the conductive member to define a waveguide between the first plurality of posts and the second plurality of posts. One or more platforms may be provided to project at least a subset of the first plurality of posts and the second plurality of posts beyond at least a portion of the conductive member adjacent to the one or more platforms. A second conductive member, such as a cover, may be coupled to the conductive member such that the first and second pluralities of posts extend between the conductive member and the cover.

Abstract: Waveguide and/or antenna assemblies for RADAR sensor assemblies/modules, particularly those for vehicles. In some embodiments, the assembly may comprise a waveguide block defining one or more waveguides, each waveguide defined by a waveguide groove. In some embodiments, at least a portion of at least one waveguide groove is non-straight, such as meandering/oscillating back and forth. An antenna structure may be operably coupled with the one or more waveguides, which structure may comprise an array of one or more slots. In some embodiments, a single, elongated slot of the one or more slots may extend along an axis of each waveguide groove for delivering electromagnetic radiation from a corresponding waveguide of the one or more waveguides therethrough.

Abstract: Waveguide and/or antenna structures for use in RADAR sensor assemblies and the like. In some embodiments, the assembly may comprise a waveguide groove extending along an elongated axis on a first side of a block and an antenna structure operably coupled with the waveguide groove. The antenna structure may comprise an antenna slot extending along the elongated axis on a second side of the block opposite from the first side and the antenna slots may be positioned and configured to deliver electromagnetic radiation from the waveguide groove therethrough. Some embodiments may further comprise one or more grooves extending adjacent to the antenna slot, such as opposing grooves extending adjacent to the antenna slot.

Abstract: RADAR sensor assemblies/modules, particularly those for vehicles. In some embodiments, the assembly may comprise a plurality of waveguides, each waveguide of the plurality of waveguides being defined by a waveguide groove. A slot may be positioned to extend along an axis of each of the plurality of waveguide grooves. Each of the waveguides may be further defined, at least in part, by a periodic feature that extends back and forth in a periodic manner along at least a portion of its respective waveguide and a plurality of periodic signal confinement structures, a first periodic signal confinement structure of which may extend adjacent to a first side of each of the plurality of waveguides, and a second periodic signal confinement structure which may extend along a second side of each of the plurality of waveguides opposite the first side.

Abstract: A differential antenna includes a substrate formed of non-radio-frequency material and a pair of conductive microstrip lines formed on the substrate. A metallic sheet is supported and spaced apart from the pair of conductive microstrip lines by a plurality of support elements to form an air gap. The metallic sheet is patterned to include a plurality of differential radiating gaps disposed along the longitudinal axis of the antenna and above a gap between the pair of conductive microstrip lines. Multiple rows of metallic vias are formed in the substrate disposed and spaced apart laterally with respect to the gap between the pair of conductive microstrip lines to define two propagation air cavities in which radiation can propagate. The differential antenna is configured such that the radiation is differential-mode, second-order radiation, which is emitted from the differential antenna at the differential radiating gaps in the metallic sheet.

Abstract: Waveguide and/or antenna structures for use in RADAR sensor assemblies and the like. In some embodiments, the assembly may comprise a waveguide groove extending along an elongated axis. An antenna structure may be operably coupled with the waveguide groove and may comprise one or more slots extending within the waveguide groove along the elongated axis. The antenna structure may be positioned and configured to deliver electromagnetic radiation from the waveguide groove therethrough. The waveguide groove and/or the slot(s) of the antenna structure may intermittently oscillate on opposite sides of the elongated axis, in some embodiments in a periodic manner, along at least a portion of the elongated axis.

Abstract: Waveguide and/or antenna structures for use in RADAR sensor assemblies and the like. In some embodiments, the assembly may comprise a waveguide groove extending along an elongated axis. An antenna structure may be operably coupled with the waveguide groove and may comprise one or more slots extending within the waveguide groove along the elongated axis. The antenna structure may be positioned and configured to deliver electromagnetic radiation from the waveguide groove therethrough. The waveguide groove and/or the slot(s) of the antenna structure may intermittently oscillate on opposite sides of the elongated axis, in some embodiments in a periodic manner, along at least a portion of the elongated axis.

Abstract: Antenna and/or waveguide assemblies for vehicles, such as RADAR sensor antenna assemblies, along with associated signal confinement structures. In some embodiments, the assembly may comprise an antenna block defining one or more waveguides. A conductive layer may be coupled to the antenna block to form, at least in part, a wall of the waveguide. The assembly may comprise one or more periodic structures that may be operably coupled to the waveguide, each of which may comprise a first elongated opening and a first series of repeated slots extending at least substantially transverse to the first elongated opening, wherein each of the first series of repeated slots is spaced apart from an adjacent slot in the first series of repeated slots along the first elongated opening.

Abstract: RADAR sensor assemblies/modules, particularly those for vehicles. In some embodiments, the assembly may comprise a plurality of waveguides, each waveguide of the plurality of waveguides being defined by a waveguide groove. A slot may be positioned to extend along an axis of each of the plurality of waveguide grooves. Each of the waveguides may be further defined, at least in part, by a periodic feature that extends back and forth in a periodic manner along at least a portion of its respective waveguide and a plurality of periodic signal confinement structures, a first periodic signal confinement structure of which may extend adjacent to a first side of each of the plurality of waveguides, and a second periodic signal confinement structure which may extend along a second side of each of the plurality of waveguides opposite the first side.

Abstract: A differential antenna includes a substrate formed of non-radio-frequency material and a pair of conductive microstrip lines formed on the substrate. A metallic sheet is supported and spaced apart from the pair of conductive microstrip lines by a plurality of support elements to form an air gap. The metallic sheet is patterned to include a plurality of differential radiating gaps disposed along the longitudinal axis of the antenna and above a gap between the pair of conductive microstrip lines. Multiple rows of metallic vias are formed in the substrate disposed and spaced apart laterally with respect to the gap between the pair of conductive microstrip lines to define two propagation air cavities in which radiation can propagate. The differential antenna is configured such that the radiation is differential-mode, second-order radiation, which is emitted from the differential antenna at the differential radiating gaps in the metallic sheet.

Abstract: A microstrip antenna includes at least one dielectric material forming a dielectric layer structure having a first main side, at least one antenna structure formed on the first main side; and a ground plane. The dielectric layer structure is positioned between said antenna structure and the ground plane (19, 43). Each of said at least one antenna structure comprises a microstrip conductor that in turn comprises a slot structure. For each of said at least one antenna structure, the microstrip conductor and the slot structure mainly extend in the direction of a longitudinal extension.

Abstract: An antenna includes a substrate, a first array of transmit antenna patches on the substrate, and a second array of receive antenna patches on the substrate. A spatial orientation of the first array with respect to the second array is selected based on a predetermined desired radiation coupling between the first array and the second array. The antenna can be part of an automotive radar sensor.

Abstract: An antenna includes a substrate, a first array of transmit antenna patches on the substrate, and a second array of receive antenna patches on the substrate. A spatial orientation of the first array with respect to the second array is selected based on a predetermined desired radiation coupling between the first array and the second array. The antenna can be part of an automotive radar sensor.

Abstract: A microstrip antenna includes at least one dielectric material forming a dielectric layer structure having a first main side, at least one antenna structure formed on the first main side; and a ground plane. The dielectric layer structure is positioned between said antenna structure and the ground plane (19, 43). Each of said at least one antenna structure comprises a microstrip conductor that in turn comprises a slot structure. For each of said at least one antenna structure, the microstrip conductor and the slot structure mainly extend in the direction of a longitudinal extension.

Abstract: A waveguide antenna for a radar antenna array, particularly for use in motor vehicles, includes a metal waveguide extending in an x direction and having a longitudinal axis, which, for the propagation of a radar wave of a first mode in the x direction, delimits an inner space, wherein in order to specifically convert the first mode to a second mode of the radar wave which is different from the first mode and to couple the second mode out of the waveguide, a plurality of structural elements arranged in the x direction are provided which extend into the inner space and wherein adjacent structural elements have a distance which is larger than half a waveguide wavelength of the radar wave of the first mode or larger than half a free-space wavelength, depending on which of the two wavelengths is smaller.

Abstract: A waveguide antenna for a radar antenna array, particularly for use in motor vehicles, includes a metal waveguide extending in an x direction and having a longitudinal axis, which, for the propagation of a radar wave of a first mode in the x direction, delimits an inner space, wherein in order to specifically convert the first mode to a second mode of the radar wave which is different from the first mode and to couple the second mode out of the waveguide, a plurality of structural elements arranged in the x direction are provided which extend into the inner space and wherein adjacent structural elements have a distance which is larger than half a waveguide wavelength of the radar wave of the first mode or larger than half a free-space wavelength, depending on which of the two wavelengths is smaller.

Abstract: A traveling wave device for the combining or splitting of symmetric and asymmetric traveling wave energy includes a feed waveguide for traveling wave energy, the feed waveguide having an input port and a launching port, a reflector for coupling wave energy between the feed waveguide and a final waveguide for the collection and transport of wave energy to or from the reflector. The power combiner has a launching port for symmetrical waves which includes a cylindrical section coaxial to the feed waveguide, and a launching port for asymmetric waves which includes a sawtooth rotated about a central axis.