Tunable patch antenna for wireless communication terminals
AssigneeNokia Corporation
InventorsJani Ollikainen, Outi Kivekas, Pertti Vainikainen
Life of this patent
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Abstract
A radio antenna comprising a tuning component, such as a transmission line, coupled to the radiating element for providing a frequency shift from the resonant frequency, and an adjustment mechanism for adjusting the frequency shift by effectively changing the length of the transmission line. The adjustment mechanism comprises one or more extension lines, and a switching mechanism, which can be closed to couple one or more of the extension lines to the transmission line. The tuning component can also be one or more lumped reactive elements.
Claims63
A radio antenna for use in a hand-held telecommunications device, said antenna including a radiating element having a resonant frequency, a grounding point and a feed point, said antenna comprising:
- a transmission line having a length between a first end and an opposing second end, the second end coupled to the radiating element for providing a frequency shift from the resonant frequency, and
- an adjustment means, disposed adjacent to the first end of the transmission line, for adjusting the frequency shift by effectively changing the length of the transmission line.
A hand-held telecommunications device comprising:
- a radio antenna having a resonant frequency for communicating with other communication devices, and
- a chassis having a chassis ground for disposing the radio antenna, wherein the antenna comprises:
- a radiating element,
- a feed point,
- a grounding point connected to the chassis ground,
- a transmission line having a length between a first end and an opposing second end, the second end coupled to the radiating element for providing a frequency shift from the resonant frequency, and
- an adjustment means, disposed adjacent to the first end of the transmission line, for adjusting the frequency shift by effectively changing the length of the transmission line.
A method of tuning a radio antenna for use in a hand-held telecommunications device having a chassis ground, wherein the antenna has a radiating element having a resonant frequency, a grounding point coupled to the chassis ground, and a feed point, said method comprising the steps of:
- providing a transmission line having a length coupled to the radiating element for providing a frequency shift from the resonant frequency, and
- providing an adjustment means for adjusting the frequency shift by effectively changing the length of the transmission line.
A radio antenna for use in a hand-held telecommunications device, said antenna including a radiating element having a resonant frequency, a grounding point and a feed point, said antenna comprising:
- a tuning component having a first end and an opposing second end, the second end coupled to the radiating element for providing a frequency shift from the resonant frequency, and
- an adjustment means, disposed adjacent to the first end of the tuning component, for adjusting the frequency shift.
Dependencies are inferred from the claim text.