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US 6,111,545 AGranted
Antenna
AssigneeNokia Mobile Phones Ltd.
InventorTimo Saari
Life of this patent
Estimating the term…
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AssigneeNokia Mobile Phones Ltd.
InventorTimo Saari
Estimating the term…
The invention comprises an antenna structure particularly suited for mobile stations. The antenna comprises a radiating element (100) which is of a conductor form. The antenna conductor comprises a basic conductor and as an extension to this a conductor (115, 116) which at least partly is located relatively close to the basic conductor. As the conductors are close to each other that causes an electromagnetic coupling, which again causes a second resonance frequency for the antenna. The bandwidth of the antenna can be widened when the second resonance frequency is arranged close to the first one. The antenna can be made as a two-band antenna when the second resonance frequency is arranged relatively far from the first one. The bands can be made relatively wide, so that the antenna operates satisfactorily in different positions and in the neighbourhood of objects. It can be fastened to the back wall of a mobile station, whereby the distance to the user's head is made as large as possible.
An antenna comprising a conductor which has a first end and a second end, whereby said first end is arranged to be connected to the antenna feeding conductor and whereby said second end is an open end of the antenna, characterised in that the conductor forms a substantially planar pattern, said second end being closer to said first end than a first point of the conductor between said first and second ends, and said second end being closer to a second point of the conductor than to said first end, said second point being located, when measured along the conductor, between said first point and said first end, for forming an electromagnetic feedback coupling between said second end and said second point of said conductor in order to create a resonance frequency.
A mobile station having an antenna, which has a conductor having a first end and a second end, whereby said first end is arranged to be connected to an antenna feeding conductor and whereby said second end is an open end of the antenna, characterised in that the conductor forms a substantially planar pattern, said second end being closer to said first end than a first point of the conductor between said first and second ends, and said second end being closer to a second point of the conductor than to said first end, said second point being located, when measured along the conductor, between said first point and said first end, for forming an electromagnetic feedback coupling between said second end and said second point of said conductor in order to create a resonance frequency.
Dependencies are inferred from the claim text.