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AssigneeFiltronic LK Oy
InventorsMika Bordi, Petteri Annamaa, Esa Mikkonen, Seppo Raatikainen
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The invention relates to a method of manufacturing a structure suitable as an internal antenna in small radio devices, and an antenna element to which the method is applied. The antenna element comprises a radiating plane and additionally e.g. supportive elements, a feed conductor and short-circuit conductor as well as extensions to increase capacitance. The antenna element is fabricated by first extruding from a billet an antenna billet, and working the latter as required. The antenna billet may be symmetrical so that two antenna elements will be produced when it is cut in half. Advantageously the antenna element is fabricated so as to conform with the covering of the device in which it is placed. It may also be part of a covering of a device. The manufacturing costs of the antenna element are relatively low and the radio characteristics of the element are good. An antenna structure employing the element has got few separate parts and is mechanically firm and space-conserving.
A method for manufacturing an internal antenna for a radio device, wherein a single-piece conductive antenna element is formed comprising a radiating plane of the antenna, the method comprising steps;
An antenna element in an internal antenna of a radio device, which element is a unitary extrusion piece comprising a radiating plane and extensions thereof.
A radio device having an internal antenna, which antenna comprises an antenna element which is a unitary extrusion piece comprising a radiating plane and extensions thereof.
Dependencies are inferred from the claim text.