Multiband antenna system and methods
2 Assignments
0 Petitions
Accused Products
Abstract
An antenna system internal to a radio device, the system comprising separate antennas and having separate operating bands. The system is implemented as decentralized in a way that each antenna is typically based on a small-sized chip component (310; 320; 330; 340; 350; 360; 610), which are located at suitable places on the circuit board (PCB) and possibly on also another internal surface in the device. The chip component comprises a ceramic substrate and at least one radiating element. The operating band of an individual antenna covers e.g. the frequency range used by a radio system or only the transmitting or receiving band in that range. At least one antenna is connected to an adjusting circuit with a switch, by which the antenna'"'"'s operating band can be displaced in a desired way. In this case the operating band covers at a time a part of the frequency range used by one or two radio systems. The antennas can be made small-sized, because a relatively small bandwidth is sufficient for an individual antenna, when there is a plurality of antennas. When the bandwidth is small, a material with higher permittivity can be chosen for the antenna than for an antenna having a wider band, in which case the antenna dimensions can be made correspondingly smaller. In addition, a good matching of the antenna is achieved on the whole width of each radio system, because the matching of a separate antenna having a relatively narrow band is easier to arrange than that of a combined multiband antenna.
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Citations
46 Claims
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1-13. -13. (canceled)
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14. An adjusting circuit for use with an antenna system of a radio device, said adjusting circuit comprising:
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an input electrically coupled to an antenna component; a filter circuit; a switching circuit; and a plurality of reactive circuits each coupled to an end of said switching circuit. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method of operating an antenna system of a radio device, said antenna system comprising a ground plane, an antenna and an adjusting circuit, said method comprising:
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operating said antenna system in a first mode of operation; sending a control signal to said adjusting circuit, said control signal switching an operating mode of said adjusting circuit; and operating said antenna system in a second mode of operation, said first and second modes of operation utilizing the same antenna. - View Dependent Claims (28, 29, 30, 31)
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32. An antenna system of a radio device, said system comprising:
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a ground plane; at least two antennas each comprising a radiating element, wherein each radiating element comprises a conductor on a surface of a dielectric substrate; wherein a distance along said ground plane between two of said radiating elements belonging to different antennas is at least the combined length of these two radiating elements; and wherein at least one antenna is connected to an adjusting circuit. - View Dependent Claims (33, 34)
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35. An antenna system of a radio device, which system comprises a ground plane and at least two antennas, each radiating element of which is a conductor on a surface of a dielectric substrate, characterized in that:
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a distance along said ground plane between two radiating elements belonging to different ones of said antennas is at least the combined length of these radiators, and at least one of said antennas is connected to an adjusting circuit adapted to displace an operating band thereof. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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Specification