Dual band antenna for a handset
AssigneeNokia Mobile Phones Ltd.
InventorFrancis Geeraert
Life of this patent
Estimating the term…
Abstract
An antenna device has a first metallic layer acting as resonator plane and defining at least two radiating elements separated by a first slit, and a second metallic layer arranged substantially in parallel with the first metallic layer and acting as ground plane for the antenna device. Feeding means are connected to said first and the second metallic layer for feeding an RF signal to the antenna device, said feeding means includes a feeding point in the first metallic layer. The first metallic layer is provided with a second slit extending from said first slit with the feeding point placed on a metallized tongue between the first and the second slit, whereby surface currents have to pass around the tips of the slits towards the radiating elements.
Claims14
An antenna device having:
- a first metallic layer acting as a resonator plane and defining at least two radiating elements separated by a first slit;
- a second metallic layer arranged substantially in parallel with the first metallic layer and acting as a ground plane for the antenna device;
- feeding means connected to said first and the second metallic layer for feeding an RF signal to the antenna device, said feeding means includes a feeding point in the first metallic layer;
- and wherein
- said first metallic layer is provided with a second slit extending from said first slit, the first and second slits forming a substantially branch shape, with the feeding point placed on a metallised tongue between the first and second slit, whereby surface currents have to pass around the tips of the slits towards the radiating elements.
A hand portable phone having an internal antenna including:
- an antenna device having:
- a dielectric body;
- a metallic layer provided on said dielectric body and acting as a resonator plane and defining at least two radiating elements separated by a first slit;
- wherein said metallic layer is provided with a second slit extending from said first slit with a feeding point placed on a metallized tongue between the first and the second slit, whereby surface currents have to pass around the tips of the slits towards the radiating elements;
- a metallic shield part covering at least a part of a printed circuit board of the phone and arranged substantially in parallel with the metallic layer on the dielectric body and acting as a ground plane for the antenna device;
- and
- a feeding means provided on the printed circuit board and connected to said metallic shield part and the metallic layer provided on said dielectric body for feeding an RF signal to the antenna device.
Dependencies are inferred from the claim text.