Internal multi-band antenna with planar strip elements
AssigneeNokia Corporation
InventorMarko Autti
Life of this patent
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Abstract
An antenna module for use in a small communications device. The antenna module comprises a dielectric block disposed on a circuit board having a ground plane, an elongated planar strip element folded to fit on different surfaces of the dielectric block, and one or more parasitic element disposed adjacent to the antenna element. In particular, the antenna element is designed to produce resonance frequencies at GSM850 and E-GSM900 bands (the lower bands) and one resonance for the GSM1800/GSM1900/WCDMA2100 bands (the upper bands). The dielectric block can be made of soft or hard plastic.
Claims21
A multiband antenna for use in a communications device operable in a first frequency range and a second frequency range, the second frequency range having higher frequencies two to three times the frequencies in the first frequency range, the communications device having a ground plane, said antenna comprising:
- a radiative element made substantially of an elongated strip of electrically conductive material, the strip having a first end and a second end, wherein the elongated strip has a first section adjacent to the first end and a second section adjacent to the second end electrically connected to the first section;
- a feeding point electrically connected to the first end of the radiative element;
- a grounding point adjacent to the feeding point, for electrically connecting the first end of the radiative element to the ground plane;
- and
- a further radiative element having an elongated segment made of electrically conductive material, and a grounding segment electrically connecting the elongated segment to the ground plane, wherein the elongated segment is disposed spaced from the radiative element and adjacent to one of the first and second sections of the elongated strip, and wherein the elongated strip has a length to provide resonance frequencies in the first frequency range, and the elongated strip is shaped such that the second section and the first section lie in axes substantially parallel to one another so that the placement of the second section relative to the first section together with the placement of the elongated segment of the further radiative element relative to the elongated strip provides resonance frequencies in the second frequency range.
An antenna module for use in a communications device operable in a first frequency range and a second frequency range, the second frequency range having higher frequencies two to three times the frequencies in the first frequency range, the communications device having a circuit board and a ground plane, said antenna module comprising:
- a support body disposed on the circuit board;
- and
- an antenna disposed on the support body, the antenna comprising:
- a radiative element made substantially of an elongated strip of electrically conductive material, the strip having a first end and a second end, wherein the elongated strip has a first section adjacent to the first end and a second section adjacent to the second end electrically connected to the first section;
- a feeding point electrically connected to the first end of the radiative element;
- a grounding point adjacent to the feeding point, for electrically connecting the first end of the radiative element to the ground plane, and
- a further radiative element having an elongated segment made of electrically conductive material, and a grounding segment electrically connecting the elongated segment to the ground plane, wherein the elongated segment is disposed spaced from the radiative element and adjacent to one of the first and second sections of the elongated strip, and wherein the elongated strip has a length to provide resonance frequencies in the first frequency range, and the elongated strip is shaped such that the second section and the first section lie in axes substantially parallel to one another so that the placement of the second section relative to the first section together with the placement of the elongated segment of the further radiative element relative to the elongated strip provides resonance frequencies in the second frequency range.
A communications device operable in a first frequency range and a second frequency range, the second frequency range having higher frequencies two to three times the frequencies in the first frequency range, said communications device comprising:
- a housing;
- a circuit board having a ground plane located in the housing;
- and
- an antenna module, the antenna module comprising:
- a support body disposed on the circuit board,
- a radiative element made substantially of an elongated strip of electrically conductive material disposed on the support body, the strip having a first end and a second end, wherein the elongated strip has a first section adjacent to the first end and a second section adjacent to the second end electrically connected to the first section;
- a feeding point electrically connected to the first end of the radiative element;
- a grounding point adjacent to the feeding point, for electrically connecting the first end of the radiative element to the ground plane, and
- a further radiative element having an elongated segment made of electrically conductive material, and a grounding segment electrically connecting the elongated segment to the ground plane, wherein the elongated segment is disposed spaced from the radiative element and adjacent to one of the first and second sections of the elongated strip, and wherein the elongated strip has a length to provide resonance frequencies in the first frequency range, and the elongated strip is shaped such that the second section and the first section lie in axes substantially parallel to one another so that the placement of the second section relative to the first section together with the placement of the elongated segment of the further radiative element relative to the elongated strip provides resonance frequencies in the second frequency range.
Dependencies are inferred from the claim text.