Wireless device capable of multiband MIMO operation
First Claim
1. A wireless handheld or portable device, comprising:
- a communication module comprising a MIMO system configured to provide multiband MIMO operation in a first frequency band and in a second frequency band, the first frequency band having a central frequency lower than a central frequency of the second frequency band, the MIMO system comprising;
a ground plane common to a first and second radiating systems;
the first radiating system being configured to transmit and receive electromagnetic wave signals in the first and second frequency bands, the first radiating system comprising;
at least one external port; and
a first radiating structure comprising;
the ground plane, a first radiation booster that fits in an imaginary sphere having a diameter smaller than ¼
of a diameter of a radiansphere of a free-space operating wavelength corresponding to a lowest frequency of the first frequency band and configured to couple electromagnetic energy from/to the ground plane, and a first internal port defined between a connection point of the first radiation booster and a first connection point of the ground plane;
a first radiofrequency system comprising;
a first port connected to the first internal port; and
a second port connected to the at least one external port of the first radiating system, wherein;
an input impedance of the first radiating structure, measured at the first internal port when disconnected from the first radiofrequency system, has an imaginary part not equal to zero for any frequency of the first frequency band; and
the first radiofrequency system modifies impedance of the first radiating structure to provide impedance matching to the first radiating system within the first and second frequency bands;
the second radiating system being configured to transmit and receive electromagnetic waves in the first and second frequency bands, the second radiating system comprising;
at least one external port; and
a second radiating structure comprising;
the ground plane, a second radiation booster that fits in an imaginary sphere having a diameter smaller than ¼
of a diameter of a radiansphere of a free-space operating wavelength corresponding to the lowest frequency of the first frequency band and configured to couple electromagnetic energy from/to the ground plane, and a second internal port defined between a connection point of the second radiation booster and a second connection point of the ground plane;
a second radiofrequency system comprising;
a first port connected to the second internal port; and
a second port connected to the at least one external port of the second radiating system, wherein;
an input impedance of the second radiating structure, measured at the second internal port when disconnected from the second radiofrequency system, has an imaginary part not equal to zero for any frequency of the first frequency band; and
the second radiofrequency system modifies impedance of the second radiating structure to provide impedance matching to the second radiating system within the first and second frequency bands; and
a module with MIMO capabilities connected to the first and second radiating systems and configured to process the electromagnetic wave signals from the first and second frequency bands.
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Accused Products
Abstract
A wireless handheld or portable device includes a communication module with a MIMO system that provides multiband MIMO operation in first and second frequency bands. The MIMO system includes first and second radiating systems, a ground plane common to the two radiating systems, first and second radio frequency systems, and a MIMO module. The first and second radiating systems both operate in the first and second frequency bands and respectively include first and second radiating structures coupled to the ground plane, which respectively have first and second radiation boosters that fit in an imaginary sphere having a diameter smaller than ¼ of a diameter of a radiansphere of a longest wavelength of the first frequency band. The first and second radiofrequency systems respectively modify impedance of the first and second radiating structures to provide impedance matching to the first and second radiating systems within the first and second frequency bands.
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Citations
20 Claims
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1. A wireless handheld or portable device, comprising:
a communication module comprising a MIMO system configured to provide multiband MIMO operation in a first frequency band and in a second frequency band, the first frequency band having a central frequency lower than a central frequency of the second frequency band, the MIMO system comprising; a ground plane common to a first and second radiating systems; the first radiating system being configured to transmit and receive electromagnetic wave signals in the first and second frequency bands, the first radiating system comprising; at least one external port; and a first radiating structure comprising;
the ground plane, a first radiation booster that fits in an imaginary sphere having a diameter smaller than ¼
of a diameter of a radiansphere of a free-space operating wavelength corresponding to a lowest frequency of the first frequency band and configured to couple electromagnetic energy from/to the ground plane, and a first internal port defined between a connection point of the first radiation booster and a first connection point of the ground plane;a first radiofrequency system comprising;
a first port connected to the first internal port; and
a second port connected to the at least one external port of the first radiating system, wherein;
an input impedance of the first radiating structure, measured at the first internal port when disconnected from the first radiofrequency system, has an imaginary part not equal to zero for any frequency of the first frequency band; and
the first radiofrequency system modifies impedance of the first radiating structure to provide impedance matching to the first radiating system within the first and second frequency bands;the second radiating system being configured to transmit and receive electromagnetic waves in the first and second frequency bands, the second radiating system comprising; at least one external port; and a second radiating structure comprising;
the ground plane, a second radiation booster that fits in an imaginary sphere having a diameter smaller than ¼
of a diameter of a radiansphere of a free-space operating wavelength corresponding to the lowest frequency of the first frequency band and configured to couple electromagnetic energy from/to the ground plane, and a second internal port defined between a connection point of the second radiation booster and a second connection point of the ground plane;a second radiofrequency system comprising;
a first port connected to the second internal port; and
a second port connected to the at least one external port of the second radiating system, wherein;
an input impedance of the second radiating structure, measured at the second internal port when disconnected from the second radiofrequency system, has an imaginary part not equal to zero for any frequency of the first frequency band; and
the second radiofrequency system modifies impedance of the second radiating structure to provide impedance matching to the second radiating system within the first and second frequency bands; anda module with MIMO capabilities connected to the first and second radiating systems and configured to process the electromagnetic wave signals from the first and second frequency bands. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A wireless handheld or portable device comprising:
a communication module comprising a MIMO system configured to provide multiband MIMO operation in a first and second frequency bands, the first frequency band having a central frequency lower than a central frequency of the second frequency band, the MIMO system comprising; a ground plane comprising first and second conducting structures electrically connected; a first radiating system configured to transmit and receive electromagnetic wave signals in the first and second frequency bands, the first radiating system comprising; at least one external port; and a first radiating structure comprising;
the ground plane, a first radiation booster that fits in an imaginary sphere having a diameter smaller than ¼
of a diameter of a radiansphere of a free-space operating wavelength corresponding to a lowest frequency of the first frequency band and configured to couple electromagnetic energy from/to the ground plane, and a first internal port defined between a connection point of the first radiation booster and a connection point of the first conducting structure;a first radiofrequency system comprising;
a first port connected to the first internal port; and
a second port connected to the at least one external port of the first radiating system, wherein;
the first radiating structure features at the first internal port, when disconnected from the first radiofrequency system, a first resonant frequency at a frequency higher than the highest frequency of the first frequency band; and
the first radiofrequency system modifies impedance of the first radiating structure to provide impedance matching to the first radiating system within the first and second frequency bands;a second radiating system configured to transmit and receive electromagnetic waves in the first and second frequency bands, the second radiating system comprising; at least one external port; and a second radiating structure comprising;
the ground plane, a second radiation booster that fits in an imaginary sphere having a diameter smaller than ¼
of a diameter of a radiansphere of a free-space operating wavelength corresponding to the lowest frequency of the first frequency band and configured to couple electromagnetic energy from/to the ground plane, and a second internal port defined between a connection point of the second radiation booster and a connection point of the second conducting structure;a second radiofrequency system comprising;
a first port connected to the second internal port; and
a second port connected to the at least one external port of the second radiating system, wherein;
the second radiating structure features at the second internal port, when disconnected from the second radiofrequency system, a first resonant frequency at a frequency higher than the highest frequency of the first frequency band; and
the second radiofrequency system modifies impedance of the second radiating structure to provide impedance matching to the second radiating system within the first and second frequency bands; anda MIMO module connected to the first and second radiating systems and configured to process the electromagnetic wave signals from the first and second frequency bands. - View Dependent Claims (16, 17, 18, 19, 20)
Specification