A radar level gauge including a wave guiding structure and a cavity formed inside the wave guiding structure, and a dielectric filling member arranged at least partly within said cavity. The dielectric filling member includes a main body formed of a polymer material, at least one microwave absorbing element formed of a modified polymer material providing a microwave attenuation of at least 1 dB/centimeter at an operating frequency of the radar level gauge, the modified polymer material being obtained by modifying said polymer material with a filler material, wherein the at least one microwave absorbing element is integrally formed with said main body by sintering.

An antenna array according to an embodiment includes a conductive member having a first and second slots adjacent to each other. The conductive surface on a front side of the conductive member is shaped so as to define a first and second horns respectively communicating with the first and second slots. The respective E planes of slots are on the same plane, or on a plurality of planes which are substantially parallel to each other. In an E-plane cross section of the first horn, a length from one of two intersections between the E plane and an edge of the first slot to one of two intersections between the E plane and an edge of the aperture plane of the first horn is longer than a length from the other intersection between the E plane and the edge of the first slot to the other intersection between the E plane and the edge of the aperture plane of the first horn, the lengths extending along an inner wall surface of the first horn.

A method of producing a waveguide-to-coaxial adapter array includes applying solder paste to inner surfaces of throughholes of an electrical conductor, inserting coaxial connectors respectively in the throughholes from a first surface of the conductor so that cores of the throughholes respectively become located at the inner surfaces of the throughholes, inserting one or more fixtures including a flat surface in the throughholes from a second surface of the conductor that is opposite to the first surface, so that the flat surface of the fixture(s) contacts the cores of the coaxial connectors and that the cores of the coaxial connectors are held against the inner surfaces of the throughholes, connecting the cores of the coaxial connectors respectively to the inner surfaces of the throughholes by melting the solder paste, and disengaging the fixture(s) from the throughholes.

An printed circuit board (PCB) assembly and method of assembling the same for a high-speed, short-reach communication link are described that provide a mechanism for transmitting radio frequency (RF) waves from one digital electronic component of the PCB assembly to another, where the second digital electronic component is located either on the same PCB assembly or on a second PCB assembly. The assembly includes a PCB having multiple layers and a digital electronic component supported by the PCB. At least one of the layers defines a channel that confines RF waves therein. An RF antenna in communication with the digital electronic component extends into the channel, and the RF antenna transmits RF signals generated by the digital electronic component into the channel as RF waves or receives RF waves via the channel and conveys corresponding RF signals to the digital electronic component.

A horn antenna array includes at least two horn antenna elements arranged along a first direction. Each of the at least two horn antenna elements includes a base having a slot extending along a second direction which intersects the first direction, and a horn communicating with the slot, the horn having a pair of electrically-conductive first inner walls intersecting the first direction and a pair of electrically-conductive second inner walls intersecting the second direction. The pair of second inner walls include a pair of opposing protrusions. When radiating an electromagnetic wave, the pair of protrusions create two radiation sources on the inside of the pair of first inner walls.

An integrated horn antenna with an integral polarization converter, and a method of manufacturing the integrated horn antenna are disclosed. The integrated horn antenna includes a horn, and a polarizer of which at least a portion is disposed in an internal space defined by an inner wall of the horn.

A housing apparatus is described which comprises a hollow conductor which is adapted for guiding an electromagnetic wave having a predeterminable wavelength and which comprises an edge surface which extends substantially perpendicularly to the propagation direction of an electromagnetic wave guided by the hollow conductor, wherein the housing apparatus comprises both a wall element and a protection apparatus having a bearing surface. The wall element holds the protection apparatus on an end of the hollow conductor by means of a pressing force.

An antenna array according to an embodiment includes a conductive member having a first and second slots adjacent to each other. The conductive surface on a front side of the conductive member is shaped so as to define a first and second horns respectively communicating with the first and second slots. The respective E planes of slots are on the same plane, or on a plurality of planes which are substantially parallel to each other. In an E-plane cross section of the first horn, a length from one of two intersections between the E plane and an edge of the first slot to one of two intersections between the E plane and an edge of the aperture plane of the first horn is longer than a length from the other intersection between the E plane and the edge of the first slot to the other intersection between the E plane and the edge of the aperture plane of the first horn, the lengths extending along an inner wall surface of the first horn.

Antennas with increased bandwidth are provided. The bandwidth of an antenna can be increased by feeding it at a single point through N sides with a 1:N power divider, where N is an integer greater than 1. This bandwidth enhancement approach can be applied to different types of antennas, and with this design approach the bandwidth of an antenna can be increased without increasing its footprint.

An integrated device comprises a horn antenna with an antenna waveguide feed, a waveguide transition element comprising a first end connected to the antenna waveguide feed and second end, and an orthomode transducer comprising a common waveguide connected to the second end of the waveguide transition element and at least two separate waveguides. The orthomode transducer is adapted to couple at least two orthogonal linear polarized fields into the common waveguide of the orthomode transducer with the aid of the at least two separate waveguides of the orthomode transducer and/or vice versa. The horn antenna is preferably adapted to support at least two waveguide modes corresponding to the at least two orthogonal linear polarized fields. The integrated device is preferably manufactured in at least two separate blocks such that each part of the at least two piece assembly is constructed as external protrusions and/or holes and/or partial holes.