Telefonaktiebolaget Lm Ericsson (publ)

Jan Sandberg

Per Ligander

Mikael Hörberg

Daniel Sjöberg

Martin Johansson

Bengt-Erik Olsson

Anatoli Deleniv

Gilbert Johansson

Anders Ahlström

Stefan Thöresson

Karl-Axel Lind

Niklas Lidström

Bengt Madeberg

Ulf Wennerlöf

The present disclosure relates to oscillator arrangement comprising an output port adapted to output an output signal with an output frequency (f), an in loop oscillator that is adapted for an in loop oscillator frequency (f) and an additional oscillator that is adapted for an additional oscillator frequency (f). The output frequency (f): exceeds the in loop oscillator frequency (f) and the additional oscillator frequency (f), is dependent on both the in loop oscillator frequency (f) and the additional oscillator frequency (f), and is adapted to control the in loop oscillator frequency (f) via a feed-back loop.

Oscillator arrangement with improved phase-noise properties

An antenna mounting bracket for pivotably mounting a directional antenna to a fixed structure, the antenna mounting bracket comprising a fixed part arranged to be attached to the fixed structure and a pivotable part arranged to hold the directional antenna, wherein the pivotable part is pivotably attached to the fixed part about a first pivoting axis A, and where a pivoting angle of the pivotable part relative to the fixed part is arranged to be controlled by an alignment member comprising a differential screw mechanism.

Antenna mounting bracket

The present disclosure relates to an oscillator device ('″) comprising an active circuit device (′″), a circuit board () and a cavity resonator (′). The active circuit device (′″) comprises an amplifier unit (), and the circuit board () comprises a first main side () and a second main side (), where the active circuit device (′″) is mounted to the first main side (). The cavity resonator (′) is positioned on the second main side (). The oscillator device () further comprises at least one excitation via connection () that runs through the circuit board () and electrically connects the active circuit device (′″) to an excitation structure () inside the cavity resonator (′).

Compact oscillator device with a cavity resonator on a circuit board

The present disclosure relates to an un-manned aerial vehicle () for aligning a first directive antenna () in a direction Dtowards a second antenna (), comprising a docking interface () arranged to attach the aerial vehicle () to a first alignment device () of the first directive antenna () and an alignment actuator () arranged to mechanically interface with the alignment device () and to actuate alignment of the first directive antenna () based on an alignment control signal. The aerial vehicle further comprises a control unit () configured to generate an alignment control signal.

Alignment means for directive antennas

The present disclosure relates to a radio unit (A,B) adapted for cross-polar signal transfer (), comprising an optical transmit interface (A,B) and an optical receive interface (A,B) which are arranged to transfer cross-polar signals for cross-polar interference cancellation, XPIC, to and from an external source, respectively. The optical transmit interface (A,B) and the optical receive interface (A,B) are arranged at equal distances (D) from a symmetry line () of the interfaces, and in a plane () perpendicular to the symmetry line (). Upon rotation of the radio unit (A,B) about the symmetry line () by 180 degrees, the optical transmit interface after rotation aligns with the optical receive interface before rotation, and the optical receive interface after rotation aligns with the optical transmit interface before rotation.

Radio unit and radio link transceiver for cross-polar signal transfer

The present disclosure relates to an oscillator device () comprising an amplifier unit () and a tunable waveguide resonator () which in turn comprises a rectangular waveguide part () having electrically conducting inner walls () and a first waveguide port (). The amplifier unit () is arranged to be electrically connected to the waveguide resonator () via the first waveguide port () by means of a first connector (). The waveguide resonator () comprises at least one tuning element () positioned within the waveguide part (), wherein each tuning element () comprises an electrically conducting body () and a holding rod (). The holding rod () is attached to the electrically conducting body () and is movable from the outside of the waveguide resonator () such that the electrically conducting body () can be moved between a plurality of positions within the waveguide part () by means of the holding rod ().

Tunable oscillator device

The present disclosure relates to a device () adapted for aligning a first directive antenna () in an alignment direction Dtowards a second antenna (). The device is adapted to acquire measurement data regarding: &#x22c5;&#x2014;a first signal power () received from the second antenna () using a first effective antenna aperture () when the first directive antenna () is moved along an angular span () passing a desired alignment angle () along a certain direction (); and &#x22c5;&#x2014;a second signal power () received from the second antenna () using a second effective antenna aperture () when the first directive antenna () is moved along an angular span () passing a desired alignment angle () along a certain direction, the second effective antenna aperture () being smaller than the first effective antenna aperture (). The device () is furthermore adapted to determine the alignment direction Das an angle () in the angular span (), at which angle () a local maximum value () for both the first signal power () and the second signal power () coincide.

A system for antenna alignment of a directional antenna used for wireless communication with respect to a target location. The system comprising the directional antenna and an unmanned aerial vehicle, UAV, arranged to be deployed in relation to the target location. The system is configured for transmission of an alignment signal between the UAV and the directional antenna and also for measuring a level of antenna alignment of the directional antenna with respect to the target location, based on the alignment signal transmission.

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Frillesås, Sweden

Jan Sandberg