MULTI-BAND COMMUNICATION SYSTEM WITH ISOLATION AND IMPEDANCE MATCHING PROVISION
First Claim
1. A communication system comprising:
- an antenna comprising a plurality of feeds coupled to a plurality of first paths, respectively, each first path configured to process signals in a group of frequency bands;
one or more matching networks, each coupled to one or more of the plurality of first paths;
a plurality of switches coupled to the plurality of first paths on one side and a plurality of second paths on the other side, each switch configured to engage one of the plurality of second paths according to a frequency band selected from the group of frequency bands corresponding to the first path coupled to the switch;
a controller configured to control the one or more matching networks and the plurality of switches; and
a look-up table coupled to the controller, the look-up table including characterization data according to frequency bands and conditions,whereinthe plurality of feeds are configured to provide isolation and a first-order impedance matching for the plurality of first paths; and
each of the one or more matching networks is controlled by the controller to provide optimum impedance for the frequency band selected and under a condition detected during a time interval.
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Abstract
A communication system is provided, including an antenna coupled to multiple RF paths, one or more matching networks, multiple switches, a controller configured to control the one or more matching networks and the multiple switches, and a look-up table coupled to the controller, the look-up table including characterization data according to frequency bands and conditions. The multiple switches are controlled to engage the signal path corresponding to the frequency band selected. The one or more matching networks are controlled by the controller to provide optimum impedance for the frequency band selected and a condition detected during a time interval with reference to the look-up table. Additional switches may be included to improve isolation.
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Citations
21 Claims
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1. A communication system comprising:
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an antenna comprising a plurality of feeds coupled to a plurality of first paths, respectively, each first path configured to process signals in a group of frequency bands; one or more matching networks, each coupled to one or more of the plurality of first paths; a plurality of switches coupled to the plurality of first paths on one side and a plurality of second paths on the other side, each switch configured to engage one of the plurality of second paths according to a frequency band selected from the group of frequency bands corresponding to the first path coupled to the switch; a controller configured to control the one or more matching networks and the plurality of switches; and a look-up table coupled to the controller, the look-up table including characterization data according to frequency bands and conditions, wherein the plurality of feeds are configured to provide isolation and a first-order impedance matching for the plurality of first paths; and each of the one or more matching networks is controlled by the controller to provide optimum impedance for the frequency band selected and under a condition detected during a time interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A communication system comprising:
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a plurality of antennas coupled to a plurality of first paths, each first path configured to process signals in a group of frequency bands; one or more matching networks, each coupled to one or more of the plurality of first paths; a plurality of switches coupled to the plurality of first paths on one side and a plurality of second paths on the other side, each switch configured to engage one of the plurality of second paths according to a frequency band selected from the group of frequency bands corresponding to the first path coupled to the switch; a controller configured to control the one or more matching networks and the plurality of switches; and a look-up table coupled to the controller, the look-up table including characterization data according to frequency bands and conditions, wherein each of the one or more matching networks is controlled by the controller to provide optimum impedance for the frequency band selected and under a condition detected during a time interval. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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Specification