Filtronic Lk Oy

Lk-Product Oy

Kari Lohtander

Esa Mikkonen

Jouni Ala-Kojola

Juha Korpela

Kalevi Pesonen

The invention relates to frame structures, particularly to mobile stations and other small-sized portable devices operating at high frequencies. The frame structure according to the invention is formed by extrusion, whereby the fixing means required for fastening components are formed into it during the extrusion. Such fixing means are preferably pin-like projections which can be compressed to a rivet fixing the component. Such fixing means can also be strip-like fixing edges which are bent over the component edges. With such fixing means it is possible to form at the same time both a mechanical fixing and a good electrical contact between the component and the frame structure. During the extrusion it is also possible to fasten to the frame structure parts made of other materials, such as fixing means of other types or other components, such as antennas.

Frame structure

A resonator or a filter consisting of resonators comprises an inner conductor or conductors and an outer conductor enclosing the inner conductor or conductors. It comprises a first part (,) and a second part (,), of which the first part comprises at least a part of the inner conductor or conductors (,) and a part of the outer conductor (,), which is integral with the inner conductor parts and made of the same material, and of which the second part comprises such a part of the outer conductor (,) which, when connected to the first part, forms a continuous outer conductor enclosing the inner conductor.

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Oulunsalo, Finland

Kari Lohtander