Abstract: A device for receiving/transmitting electromagnetic signals from/to at least two satellites fixedly located at points at the geostationary path comprises an antenna, for example a lens (1) of waveguide nature. The antenna images remote points at a focal surface and in the points where the satellites are imaged receiver horns (23, 23?) are placed. The horns are adjustably mounted to a rail (21) of a mounting unit (9) except the central horn (23?) that is fixedly placed for receiving along the optical axis of the antenna, at a predetermined distance of the antenna. The rail is mounted to be rotated about the optical axis of the antenna, this giving a simple adjustment of the other horns (23). Using an adjusting assembly the curvature of the rail can be varied to be adapted to receiving at different latitudes.

Abstract: A device for receiving/transmitting electromagnetic signals from/to at least two satellites fixedly located at points at the geostationary path comprises an antenna, for example a lens (1) of waveguide nature. The antenna images remote points at a focal surface and in the points where the satellites are imaged receiver horns (23, 23′) are placed. The horns are adjustably mounted to a rail (21) of a mounting unit (9) except the central horn (23′) that is fixedly placed for receiving along the optical axis of the antenna, at a predetermined distance of the antenna. The rail is mounted to be rotated about the optical axis of the antenna, this giving a simple adjustment of the other horns (23). Using an adjusting assembly the curvature of the rail can be varied to be adapted to receiving at different latitudes.

Abstract: An antenna suited for receiving/transmitting electromagnetic signals from/to at least two satellites, which are fixedly placed at points on the geostationary path, is waveguide or lens type, formed by a multitude of waveguiding channels, which for example can be rotationally symmetrically arranged about an axis. Signals from remote points, which arrive in directions somewhat deviating from the direction of the axis, e.g. in an angle &agr;in thereto, exit after being refracted in the antenna in a different direction, so that the angle &agr;ut on the exit side differs from the angle &agr;in on the entrance side. It is achieved by having all of the waveguiding channels form suitably adapted angles to the axis. For a concave antenna it can give an increased separation between the positions, to which signals from remote objects are refracted by the antenna. It results in, for example, large more efficient receiver horns being used for the same size of the antenna.

Abstract: In a waveguide lens for primarily circularly or linearly polarized electromagnetic radiation there is one or several rotationally symmetrical rings, arranged concentrically about a lens axis, for focusing of the incoming part of an electric magnetic wave, which has a polarization parallel to the rings, to a focus. For a still more efficient reception one or more plates arranged radially are designed so that the radial component of the electromagnetic wave is focused to the same focus. Alternatively there is instead of rings one or more spiral arms extending from the lens axis. The lens eliminates the problem of existing lens types that they only receive waves having a predetermined polarization which must be adapted to the orientation of the lens plates and the phase shifting elements. It makes for instance the reception of satellite signals more difficult, where the satellite signal is polarized in relation to the earth axis and the latitude where the satellite is located.

Abstract: An antenna suited for receiving/transmitting electromagnetic signals from/to at least two satellites, which are fixedly placed at points on the geostationary path, is waveguide or lens type, formed by a multitude of waveguiding channels, which for example can be rotationally symmetrically arranged about an axis. Signals from remote points, which arrive in directions somewhat deviating from the direction of the axis, e.g. in an angle &agr;in thereto, exit after being refracted in the antenna in a different direction, so that the angle &agr;ut on the exit side differs from the angle &agr;in on the entrance side. It is achieved by having all of the waveguiding channels form suitably adapted angles to the axis. For a concave antenna it can give an increased separation between the positions, to which signals from remote objects are refracted by the antenna. It results in, for example, large more efficient receiver horns being used for the same size of the antenna.

Abstract: To permit multiple use of data entry keys, and to effect different circuit connections by a single key, operation of any one of the keys is associated with time slots, or time windows so that, upon operation of anyone of the keys, a course, or sequence of time slots at intervals is initiated, each interval or time slot being temporally associated with a specific circuit connection. The length of the time course, that is, the number of time slots or time intervals is selected by continued operation of anyone of the control buttons, this continuance of operation or operating of another button, entering the then pertaining circuit into the system. An indicator is provided, continuously indicating the then pertaining time slot, and an additional indicator providing a symbolic output representative of the finally established circuit connection.