Nokia Corporation

Jari Kolehmainen

Ilpo Kokkonen

Timo Tarvainen

Arto Auno

Juha Seppala

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

The invention relates to a power management arrangement which comprises, formed as a multilayer structure (), several insulating layers (); several conductive layers () functioning as reference planes; a first port (), a second port () and a third port (); a first transmission line () from the first port () to the second port (), a second transmission line () from the first port () to the third port (); means () for connecting the transmission lines () to the ports (); and at least one passive element () between the second and the third port (). In the presented power management arrangement, the first transmission line () is in an insulating layer () other than the one where the second transmission line () is.

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Oulu, Finland

Jari Kolehmainen