Nokia Corporation

Nokia Siemens Networks Oy

Aalto University Foundation

Sergei A Tretyakov

Pekka Ikonen

Jussi Säily

Igor Nefedov

Jukka Venermo

Olli Luukonen

Pekka Alitalo

Liisi Schulman

Mikhail V Lapin

Stanislav I Malovski

Mikko Kaunisto

Constantin Simovski

Stanislav Maslovski

Vasil Denchev

Igor Kolmakov

Jussi Saily

A structure made of in certain frequency bands invisible material includes a transmission line network. The structure has a matching layer at the boundary of the material, supporting structures inside the transmission line network and that the transmission line network has been matched with the surrounding space.

Structure for reducing scattering of electromagnetic waves

A phase shifting method and a phase shifter are provided. The phase shifter comprises a first () and a second () transmission line structure in parallel, the structures having a common input, each structure comprising cascaded forward and backward transmission lines and the same number of components. The component values of the second structure are equal to the component values of the first structure multiplied by a given proportionality constant.

Broadband phase shifter

An antenna array includes a plurality of antenna unit cells, a ground plane, and at least one artificial magnetic layer AML unit cell. At least one AML unit cell is disposed between at least two adjacent ones of the antenna unit cells. The AML unit cells include a pair of split ring resonators through a ring dielectric layer, and the resonators are capacitively coupled to the a ground plane of the antenna array through a capacitor dielectric layer. The resonators are orthogonal to one another and to the ground plane, and more than one pair may be defined in each AML unit cell. Magnetic energy from the antenna unit cells induces an electric field in the resonators, and the resulting magnetic field is strongly coupled to the AML unit cell to inhibit mutual coupling between radiating elements by suppression of surface wave propagation.

Antenna array and unit cell using an artificial magnetic layer

In an RF antenna having a planar radiating element disposed adjacent to a ground plane, one or more metasolenoids are disposed between the radiating element and the ground plane. As such, the magnetic flux through the metasolenoids interacts with the radiating element and the ground plane, widening the bandwidth of the antenna. Each of the metasolenoid comprises a stack of split-ring resonators co-axially aligned. The gap in each split-ring resonator is oriented differently from the gap in the adjacent split-ring resonator. The use of metasolenoids disposed between the radiating element and the ground plane does not increase the volume of the radiating element.

Method and device for loading planar antennas

Growing community of inventors

Espoo, Finland

Sergei A Tretyakov