Nokia Solutions and Networks Oy

Other

Nokia Corporation

Nokia Mobile Phones Limited

Murat Emre Ermutlu

Kauko Heinikoski

Risto Tapani Martikkala

Efstratios Doumanis

Marko Johannes Leukkunen

Jorma Pallonen

Kari Kalle-Petteri Kiesi

Oskari Amper

Juha Olli Jokilahti

Juha Jokilahti

An antenna system comprising: a ground plane; an antenna radiator separated from and overlapping the ground plane; at least one feed element configured to provide a radio-frequency feed for the antenna radiator; and at least one resonator coupled to the feed element and positioned in a space between the ground plane and the antenna radiator, wherein the antenna radiator is a broadband antenna radiator having a first operational range of frequencies and the resonator is a narrow band resonator having a second range of resonant frequencies that at least partially lie within the first operational range of frequencies.

Antenna system

An antenna system including a ground plane, an antenna radiator separated from and overlapping the ground plane and at least one first conductive element extending the antenna radiator towards the ground plane. The antenna system also includes at least one feed element configured to provide a radio-frequency feed for the antenna radiator. The feed element is spatially separated from the first conductive element and the antenna radiator.

Antenna system with radiator extensions

A resonator for radio frequency, RF, signals, said resonator comprising a cavity having a longitudinal axis, a first wall, at least one side wall, and a lid arranged opposite the first wall, wherein said resonator further comprises a guiding device which is arranged at said at least one side wall and is configured to guide an axial movement of said lid along said longitudinal axis.

Resonator for radio frequency signals

There is provided an antenna arrangement including at least two conductive sheet arranged around at least one ground plane for transmitting radio signals from feeder cables on a transmission frequency band such that the antenna arrangement has a substantially omnidirectional radiation pattern and the antenna arrangement is configured to polarize the radio signals from a first feeder cable horizontally in a first radiation direction of the radiation pattern, polarize the radio signals from a second feeder cable vertically in a second radiation direction of the radiation pattern, polarize the radio signals from the first feeder cable and from the second feeder cable non-linearly in other radiation directions, whereby the non-linearly polarized radio signals from the first feeder cable and the second feeder cable are substantially orthogonal.

Antenna arrangement for orthogonally polarized omnidirectional transmission

A switch is particularly advantageous for calibration of signal phase between transmitters, and other uses. The switch has a first data input adapted to input a transmit signal from a first transmitter, a first data output, at least one and preferably multiple bidirectional data ports, and a control input adapted to selectively couple in a first case the first data input to one of the bidirectional data ports, and in a second case one of the bidirectional data ports and the first data input to the first data output. By coupling one data port of the switch to a data port of another identical switch, a transmit signal from another transmitter can be ported to the first said switch, and both signals output to a feedback circuit that finds the phase difference and applies it to a new signal input to one of the transmitters. Beamforming and MIMO uses are also detailed.

Phase and power calibration in active antennas

A quadrifilar helix antenna has four inter-twined helical antenna elements offset from one another by 90&deg;. The elements are identical and each can be defined by an axial coefficient z, a radial coefficient r, and an angular coefficient &thgr;. While the radial coefficient r remains constant along the axis of the elements, the axial coefficient is defined in terms of the angular coefficient according to:

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Helsinki, Finland

Murat Emre Ermutlu