Abstract: An antenna arrangement having a stacked layered structure. The antenna arrangement including a radiation layer having a surface. The surface is delimited by a surface boundary. A first and a second slot extend along a first slot axis and second slot axis, respectively, and are arranged on the surface. The antenna arrangement also includes a distribution layer facing the radiation layer. The distribution layer is arranged to distribute a radio frequency signal to the first and second slots. The distribution layer includes a distribution layer feed and a ridge arranged to form a first ridge waveguide intermediate the distribution layer and the radiation layer. The ridge includes a first section connected to a second section via a curved section. The first section extends along a first ridge axis and the second section extends along a second ridge axis different from the first ridge axis.

Abstract: An antenna arrangement (100) having a layered configuration comprising a slot layer (130) comprising one or more slot layer apertures (131), and a distribution layer (120) facing the slot layer. The distribution layer is arranged to distribute two radio frequency, RF, signals to the one or more slot layer apertures (131). The distribution layer comprises a distribution layer feed (121) and at least one first waveguide (122) arranged to guide the RF signals between the distribution layer feed and the one or more slot layer apertures (131). The first waveguide (122) is a dual mode ridge waveguide comprising two parallel ridges (123) arranged on the distribution layer (120) and along the first waveguide, where the two ridges are arranged in proximity to each other to support two modes.

Abstract: An antenna arrangement having a stacked layered structure. The antenna arrangement including a radiation layer having a surface. The surface is delimited by a surface boundary. A first and a second slot extend along a first slot axis and second slot axis, respectively, and are arranged on the surface. The antenna arrangement also includes a distribution layer facing the radiation layer. The distribution layer is arranged to distribute a radio frequency signal to the first and second slots. The distribution layer includes a distribution layer feed and a ridge arranged to form a first ridge waveguide intermediate the distribution layer and the radiation layer. The ridge includes a first section connected to a second section via a curved section. The first section extends along a first ridge axis and the second section extends along a second ridge axis different from the first ridge axis.

Abstract: An antenna arrangement having a stacked layered structure. The antenna arrangement includes a radiation layer including one or more radiation elements, and a distribution layer facing the radiation layer. The distribution layer is arranged to distribute a radio frequency signal to the one or more radiation elements. The distribution layer includes at least one distribution layer feed. Any of the distribution layer and the radiation layer includes a first electromagnetic bandgap, EBG, structure arranged to form at least one first waveguide intermediate the distribution layer and the radiation layer. The first EBG structure is arranged to prevent electromagnetic radiation in a frequency band of operation from propagating from the first waveguide in directions other than through the distribution layer feed and the one or more radiation elements. The radiation layer and the distribution layer are attached to each other with one or more fastening members including respective deformable tails.

Abstract: An antenna arrangement suitable for a vehicle radar transceiver. The antenna arrangement includes a radiating layer having a surface, the surface delimited by a surface boundary. One or more apertures are arranged on the surface. The antenna arrangement further includes one or more surface current suppressing members arranged on the surface. The one or more surface current suppressing members are arranged to suppress a surface current from an aperture to the surface boundary. The one or more surface current suppressing members include one or more grooves.

Abstract: A transition arrangement for interconnection of waveguide structures or waveguide flanges for forming a waveguide twist, wherein a waveguide twist section arrangement including a number of waveguide twist sections is arranged between the waveguide structures or waveguide flanges for rotating the polarization of waves or signals twisted or forming an angle with an adjacent waveguide flange and/or another adjacent waveguide twist section with respective waveguide openings. The or each twist section on at least one side includes a surface of a conductive material with a periodic or quasi-periodic structure formed by a number of protruding elements allowing waves to pass across a gap between a surface around a waveguide opening to another waveguide opening in a desired direction or waveguide paths, at least in an intended frequency band of operation, and to stop propagation of waves in the gap in other directions.

Abstract: A phased array is disclosed, including: a base layer including a substrate with a plurality of protruding posts, for stopping wave propagation along the base layer, and a printed circuit board (PCB) arranged on the base layer, and including at least one phased array radio frequency (RF) integrated circuit (IC) on a first side of the PCB facing the base layer and the protruding posts. The PCB further includes feeds for transferring of RF signals from the phased array RF IC(s) to an opposite second side of the PCB. A radiating layer, including a plurality of radiating elements for transmitting and/or receiving RF signals from the phased array antenna is also provided, together with a feeding layer for transfer of RF signals, arranged between the feeds of the PCB on the second side and the radiating elements of the radiating layer.

Abstract: A transition arrangement including a first transmission line being a planar transmission line including a coupling section and being disposed on a dielectric substrate layer. The substrate layer has a periodic or quasi-periodic structure arranged in the substrate layer such as to be disposed along at least part of the first transmission line and to partly surround the coupling section. The transition arrangement includes a conducting layer on which the substrate layer is arranged and which is adapted to act as a ground plane, and the periodic or quasi-periodic structure is so arranged and at such a distance from the first transmission line and/or the coupling section that EM energy, RF power, can be coupled contactlessly between the first transmission line and the periodic or quasi-periodic structure, the transition between the first transmission line and the periodic or quasi-periodic structure being planar and contactless without any galvanic contact.

Abstract: A bowtie antenna arrangement including at least one bowtie structure including bowtie arm sections made of an electrically conducting material with each an end portion facing an end portion of another bowtie arm section, a base portion including a conducting ground plane, the bowtie structure being connected to a feeding arrangement. The bowtie arm sections are planar, made of a conducting sheet or plate element and are arranged in a bowtie arm section plane located in parallel with, at a first distance from a first side of the base portion, the, or each, bowtie arm structure being connected to a feeding port on a second side of the base portion.

Abstract: A method and apparatus for producing an RF part of an antenna system is disclosed, as well as thereby producible RF parts. The RF part has at least one surface provided with a plurality of protruding elements. In particular, the RF part may be a gap waveguide. The protruding elements are monolithically formed and fixed on a conducting layer, and all protruding elements are connected electrically to each other at their bases via the conductive layer. The RF part is produced by providing a die having a plurality of recessions forming the negative of the protruding elements of the RF part. The die may be a multilayer die, having several layers, at least some having through-holes to form the recessions. A formable piece of material is arranged on the die, and pressure is applied, thereby compressing the formable piece of material to conform with the recessions of the die.

Abstract: An arrangement for interconnecting waveguide structures or components including waveguide flange adapter elements with a surface of a conductive material with a periodic or quasi-periodic structure formed by a number of protruding elements that allows waves to pass across a gap between a surface around a waveguide opening to another waveguide opening in a desired direction or path, at least in an intended frequency band of operation, and to stop wave propagation in the gap in other directions. The arrangement includes devices for interconnecting with a waveguide flange or adapter element without requiring electrical contact and assuring that the gap is present between at least one first surface formed by periodically or quasi-periodically arranged protruding elements and a surface around a waveguide opening of the other waveguide flange, hence assuring that the first surface is not in direct mechanical contact with the other, opposite, interconnecting, waveguide flange.

Abstract: A self-grounded bowtie antenna arrangement includes an antenna structure having a number of antenna petals. An antenna petal has an arm section tapering toward an end tip portion and is made of an electrically conductive material. End tip portions are arranged to approach a first side of a base portion and to connect to feeding ports. The base portion includes a conductive ground plane or a printed circuit board. Each antenna petal is made in one piece from a conductive sheet, such as metal, and is surface-mounted on either the front side or back side of the base portion. Antenna petals can be mounted by automatic placement and soldering (“pick-and-place”) machines.

Abstract: An apparatus for calibration of an electronic instrument, such as a vector network analyzer, includes a number of calibrator connector elements for connection to the instrument, and a plate element including a plurality of calibration waveguide structures. The plate element has conductive surfaces, and the calibrator connector elements and conductive surfaces include periodic structures disposed with respect to each other such that gaps are formed between them. An interface enables interconnection of a waveguide of a calibrator connector element, a waveguide of the instrument, and a calibration waveguide structure. The apparatus includes a driving unit and controller for moving the plate element and/or the calibrator connector element to connect the calibrator connector element to different calibration waveguide structures.

Abstract: A self-grounded antenna arrangement includes a base or central portion in a first plane and a number of arm sections associated with the central portion that taper toward a respective end tip. Each arm section is adapted to form a transition from the central portion and being bent backward toward the central portion by more than 180 degrees so that its end tip approaches a first side of the central portion, at an opening in the central portion. The end tip is connected to a feeder configured to feed, via an arm-section-specific port, one specific port for each arm section. Each arm section has a mixed functionality of a curved monopole antenna and a loop antenna, and the antenna arrangement provides substantially uncoupled ports with far-field functions that are almost orthogonal in polarization, direction, or shape. The arrangement finds use in multiple-input multiple-output antenna systems for statistical multipath environments.

Abstract: A self-grounded antenna arrangement includes a base or central portion in a first plane and a number of arm sections associated with the central portion that taper toward a respective end tip. Each arm section is adapted to form a transition from the central portion and being bent backward toward the central portion by more than 180 degrees so that its end tip approaches a first side of the central portion, at an opening in the central portion. The end tip is connected to a feeder configured to feed, via an arm-section-specific port, one specific port for each arm section. Each arm section has a mixed functionality of a curved monopole antenna and a loop antenna, and the antenna arrangement provides substantially uncoupled ports with far-field functions that are almost orthogonal in polarization, direction, or shape. The arrangement finds use in multiple-input multiple-output antenna systems for statistical multipath environments.