Nokia Corporation

Nokia Mobile Phones Limited

Timo Tarvainen

Marko Erom&auml;ki

Jari Kolehmainen

Esa-Sakari Maatt&auml;

Juha Seppala

Arto Auno

Determining the RF shielding effectiveness of a shielding structure including measuring RF isolation between a first and a second element of a directional coupler and providing a first measurement result, placing a shielding structure so that a part of the shielding structure is substantially between the first element and the second element of the directional coupler, measuring RF isolation between the first element and the second element of the directional coupler RF and providing a second measurement result, and determining the shielding effectiveness of the shielding structure based at least in part on the first and the second measurement result.

Method for determining the RF shielding effectiveness of a shielding structure

A method in the manufacture of a keyboard for an electronic device, the keyboard comprising a set of separate key caps fitted next to each other for transferring pressings, wherein each key cap is further attached to a common base. In the method, the key caps are separated from a solid piece by laser cutting, the piece being simultaneously attached to said base in such a way that the pieces to be separated from the piece, of which each represents one of said key caps, remain attached to said base even after the cutting.

Method in the manufacture of a keyboard for an electronic device

Growing community of inventors

Oulu, Finland

Timo Tarvainen