A waveguide connecting structure includes an inserting waveguide having an inserting conduit line and a flange extending outwardly in a conduit radial-direction, and a receiving waveguide having a receiving conduit line, a receiving structure into which the inserting waveguide is inserted, and stub grooves disposed on both sides of the receiving conduit line outwardly in the direction. The receiving structure has a receiving end face extending in the radial direction and opposing to a flange end face, and an annular receiving inner-circumferential surface disposed outward of the flange and extending in a conduit axial-direction. An electric length of each stub groove in the axial direction from an opening first end to a closing second end is ½ of a conduit wavelength of the stub groove.

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.

A modular electromagnetic antenna assembly configured for securement to a structure is provided. The assembly includes an antenna, a radio, and a base. The base has a bracket securable to the structure and the base has at least one feed. The radio and base together form a waveguide that transmits radio waves between the radio and the antenna. The radio is removably secured to the base so as to form a removable mechanical connection to the base and a removable communication connection with the at least one feed through the base.

Antenna assemblies for vehicles, such as RADAR sensor antenna assemblies. In some embodiments, the assembly may comprise an antenna block defining a waveguide groove and an adapter portion comprising a ridge. The ridge may taper or otherwise transition in height and/or width to facilitate a transition between two adjacent elements of the assembly, such as two adjacent waveguide structures comprising ridges having different cross-sectional dimensions.

The present invention reduces the risk of damaging a waveguide made of a brittle material. A transmission line (1) includes: a first waveguide (11) which is made of a brittle material; a second waveguide (21); and a bonding layer (31) by which the first waveguide (11) and the second waveguide (21) are bonded and which is electrically conductive. At least part of the bonding layer (31) is made of an electrically conductive adhesive, the at least part of the bonding layer (31) being in contact with the first waveguide (11).

A high-frequency component for radar-based distance measurement comprises: a semiconductor component configured to generate electrical high-frequency signals; and coupling element configured as a substrate-integrated waveguide and electrically contacted by the semiconductor component as to couple the high-frequency signals as radar signals into a hollow waveguide of the high-frequency component, the hollow waveguide being in galvanic contact with the coupling element such that no defined distance between the hollow waveguide and the coupling element must be set to achieve an efficient coupling out of the high-frequency signal into the hollow waveguide. The galvanic contact thereby enables a simple manufacture of the high-frequency component and a compact and accurate distance measuring device using the high-frequency component.

A connector includes a first antenna configured to transmit first signals in a first direction and with a first polarization, a second antenna coupled to the first antenna and configured to transmit second signals in a second direction that is parallel to the first direction and with a second polarization that is orthogonal to the first polarization, and a third antenna coupled to the first and second antennas and configured to transmit third signals in a third direction that is parallel to the first direction and with the first polarization, wherein the second antenna is positioned between the first and third antennas.

The present invention relates to a guiding set for radio-electric waves comprising a pair of waveguides made up of a first waveguide and a second waveguide forming successive segments of a same transmission way for the radio-electric waves. The set is characterized in that it further comprises a connecting piece comprising two plates arranged opposite one another while defining an inner space between them, and delimiting means delimiting, in the inner space, a radio-electric wave transmission channel, the transmission channel emerging on the one hand on the first waveguide and on the other hand on the second waveguide.

A dual-polarized antenna array for a one-dimensional (1D) active electronically steerable array (AESA) includes first and second arrays of open-ended waveguide elements interleaved with one another, each array including a plurality of corporate networks extending transverse to a scan plane SP and having a series of the elements spaced transversely of the scan plane, and wherein each of element is coupled to a respective corporate network by a waveguide twist and oriented oblique to the scan plane. The waveguide elements of one array are oriented orthogonal to the waveguide elements of the other array.

An apparatus and method for orthogonal rotation of a radiation E-field polarization rely on a radiating element including an offset-ridge waveguide and a single-mode first ridge waveguide functionally adjacent to the offset-ridge waveguide.