Allgon Ab

Powerwave Technologies Sweden Ab

Tord Liljevik

Dan Karlsson

Stefan Jonsson

Olov Ekervik

Björn Lindmark

Per-Anders Arvidsson

Daniel Åkesson

Jarmo Mäkinen

Torbjörn Lindh

Erik Östlind

Johan Dagerhamn

An antenna control system in which various antenna elements in a vertical row are coupled by fixed transmission lines to a central feeding point for a common signal. Adjustment of the phase of the common signal is achieved by means of a linearly movable slide having dielectric body portions influencing the signal velocity along said fixed transmission lines. Further, an electrical motor is used for linearly displacing said movable slide with said dielectric body portions.

Antenna control system

The present invention relates to a device for adjusting the beam direction of a beam radiated from a stationary array of antenna elements. Antenna element feed points are coupled to a common source via a feed line structure having a source connection and feed connection terminals to be connected to the antenna element feed points, the feed line structure being at a distance from and in parallel to a fixed ground plane. A movable element is located adjacent to the feed line structure to change the signal phase of signal components being transferred between the source connection and the respective feed connection terminals. The movable element is movable for effecting a phase shift of the signal components to adjust the beam direction. The device is provided with a detection arrangement for detecting the absolute position of the movable element.

Beam adjusting device

The invention generally relates to a connector () for receiving a cable end (), arranged for being attached to a circuit board. The connector is provided with a through hole () for receiving the cable end, at least one upper lip () and at least one lower lip () with a connector recess () therebetween for fitting onto an edge of a slit () in the circuit board. The connector is further provided with at least one snap holding element (), disposed adjacent to said connector recess (), so as to engage with a portion () of the circuit board, adja-cent to the edge of the slitin the circuit board.

Circuit board connector

A device for adjusting the beam direction of a beam radiated from a stationary array of antenna elements. The device includes a feed line structure configured as a star with at least four line segments extending from a central source connection terminal at the centre of the star, to the respective feed connection terminals. The dielectric body with two different body portions, having different effective dielectric values, is displaceable between two end positions in a central, region of the device.

A shielded housing of electrically conducting material for use in various electromagnetic applications. The housing comprises an upper part ( ) and a lower part ( ), each part having two side flanges ( ). When the housing is assembled, one of the pairs of side flanges fits resiliently inside the other pair, and the mutually contacting side flanges exert a surface contact pressure against each other, so as to jointly form sidewalls of the housing.

Shielded housing

A mounting bracket useful for securing a base, such as an antenna to a pole, a tube or a post, or a similar anchor support, and including a first clamp part, being a base clamp, to be secured to the base (the antenna) adapted to be locked against the pole, and a second clamp part, being tightening clamp, adapted to partly embrace the pole and to be tightened to the base clamp with the pole clamped therebetween, preferably by a screw-nut connection on each side of the pole. The tightening clamp, is formed with two elongated slots extending in the longitudinal direction of the clamp, a first slot of which may be closed and the second slot of which is open at the end of the clamp. The slots having a width matching the diameter of the clamp screws, a length which is at least twice the diameter of the clamp screws and arranged such that the open slot of the tightening clamp can be rotated freely past the corresponding bolt thereby engaging the corresponding clamp screw through the open end of the slot after the pole has been placed in contact with the base clamp. A tightening clamp and a base clamp can be joined in a rotational joint. Thereby an object, which is mounted, e.g. an antenna, can be panned.

Growing community of inventors

Bromma, Sweden

Tord Liljevik