Pulse Finland Oy

Lk Products Oy

Filtronic Lk Oy

Filtronic Lx Oy

Gettop Europe R&d Aps

Matti Niemi

Petteri Annamaa

Jyrki Mikkola

Morten Kjeldsen Andersen

Kimmo Antila

Pertti Puurunen

Seppo Raatikainen

Petra Ollitervo

Yasser Amin

Yrj&ouml; Perki&ouml;

Petri Huhtalo

Aki Lamponen

The invention relates to a method for mounting a radiating antenna element used especially in the manufacture of small-sized radio devices and a radio device with a radiator mounted by the method. A thin thermoplastic plate coated with a metal foil is used in the manufacture of the antenna. A radiator pattern is formed in the metal foil. The antenna component obtained is placed () on the surface of some plastic part of the radio device, preferably on the inner surface of the thermoplastic cover of the radio device. The plastic layer of the antenna component becomes positioned against said plastic part, and the component is fastened () by fusing together the mating plastic materials, which are against each other. In the complete antenna, the radiator is electrically connected to the other parts of the radio device by means of contacts. The radiator of the antenna of the radio device becomes fastened to the radio device very firmly, which has a stabilizing effect on the electric properties of the antenna. In addition, the antenna can be formed using relatively cheap raw materials.

Method for mounting a radiator in a radio device and a radio device

A radiating antenna element intended for small-sized radio devices and a method for manufacturing the same. The element () is manufactured of a plate comprising a dielectric substrate coated with conductive material on one side. The radiating conductor branches corresponding to the operating bands of the antenna are formed on the plate by removing the conductive coating by laser narrowly from the border line of the area () between the designed conductor branches. The conductor area confined by the created border groove can be used as a parasitic additional radiator. If needed, the conductor area confined by the border groove () can also be split into a number of small conductor areas (CA, CA), in order to make sure that the conductor area does not radiate or have any substantial effect on the coupling between the radiating conductor branches. A relatively wide area 'invisible' on the operating frequencies of the radiating branches of the antenna can be formed between the branches by the customary laser technique. This means lower manufacturing costs compared to the use of the etching process, and the creation of problem waste is also avoided.

Antenna element and a method for manufacturing the same

Internal planar antenna especially applicable to mobile communication devices. A PIFA-type planar antenna is fed coaxially-like. This means that the feed conductor ( ) of a radiating plane ( ) is surrounded by a shield conductor ( ) galvanically connected to the ground plane (GND) for the length between these planes. The shield conductor at the same time serves as a short circuit conductor for the antenna. The antenna is matched by means of a matching slot ( ) going between the connection points of the feed and short circuit conductors, and/or of the shape of the short circuit conductor. A feed arrangement at issue increases antenna gain without increasing the SAR value of the antenna.

Planar antenna

A radio device comprises an antenna for transmitting and receiving radio frequency signals. The antenna comprises a radiating antenna element (,) and a dielectric protective casing (,) attached to each other, whereby the dielectric protective casing substantially encloses the antenna element. Further the radio device comprises a protective casing (,) of the radio device for mechanically supporting the radio device and for protecting its electrical components, and a printed circuit board (,) within the protective casing for connecting the electrical components to the radio device and for forming the electrical connections between the components. The antenna is mechanically fastened to the radio device with the aid of counterpart fastening shapes (,) located in the antenna's protective casing and in the radio device's protective casing. The antenna is electrically connected to the radio device by a connection between a certain point (,&prime;) of the radiating antenna element and a certain point (,) of the radio device.

Antenna of a radio device and a method to manufacture it and a radio device

An antenna construction comprises a feed conductor (11, 21) and an antenna element (12, 22, 24, 25, 26, 27) which has a first end and a second end. The feed conductor is substantially electrically unshielded and coupled to the antenna element at a tapping point (13, 23) located between the first end and second end of the antenna element the tapping point dividing the antenna element into two portions having unequal electrical lengths. The antenna element may be a helix (12), a whip (22) or another known two-ended antenna element or a combination of those.

Simple dual-frequency antenna

Growing community of inventors

Arkkukari, Finland

Matti Niemi