METHOD AND APPARATUS FOR ANTENNA SELECTION
First Claim
1. A mobile communication device, comprising:
- a transceiver;
an antenna system coupled with the transceiver, wherein the antenna system includes a first antenna and a second antenna, wherein one of the first or second antennas is operating as a primary antenna and another of the first or second antennas is operating as a diversity antenna;
an RF switch connected with the antenna system, wherein the RF switch has a first position in which the first antenna is the primary antenna and the second antenna is the diversity antenna, and wherein the RF switch has a second position in which the second antenna is the primary antenna and the first antenna is the diversity antenna;
a matching network coupled with the transceiver and the antenna system, wherein the matching network comprises a tunable reactive element; and
a controller coupled with the matching network and with the RF switch, wherein the controller receives first reflection measurements associated with the antenna system, wherein the controller adjusts the tunable reactive element according to the first reflection measurements to provide impedance tuning, wherein the controller adjusts the RF switch to select between the first and second positions according to the first reflection measurements,wherein the controller adjusts the RF switch to select between the first and second positions according to the first reflection measurements and a distance measured from free space designated on a stored tuning grid.
4 Assignments
0 Petitions
Accused Products
Abstract
A system that incorporates teachings of the subject disclosure may include, for example, an antenna system coupled with the transceiver that includes a first antenna and a second antenna where one of the first or second antennas is operating as a primary antenna and the other of the first or second antennas is operating as a diversity antenna. The system can include an RF switch connected with the antenna system, where the RF switch has a first position in which the first antenna is the primary antenna and the second antenna is the diversity antenna, and wherein the RF switch has a second position in which the second antenna is the primary antenna and the first antenna is the diversity antenna. The system can include a controller coupled with the matching network and with the RF switch, where the controller receives first reflection measurements associated with the antenna system, and where the controller adjusts the RF switch to select between the first and second positions according to the first reflection measurements.
50 Citations
20 Claims
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1. A mobile communication device, comprising:
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a transceiver; an antenna system coupled with the transceiver, wherein the antenna system includes a first antenna and a second antenna, wherein one of the first or second antennas is operating as a primary antenna and another of the first or second antennas is operating as a diversity antenna; an RF switch connected with the antenna system, wherein the RF switch has a first position in which the first antenna is the primary antenna and the second antenna is the diversity antenna, and wherein the RF switch has a second position in which the second antenna is the primary antenna and the first antenna is the diversity antenna; a matching network coupled with the transceiver and the antenna system, wherein the matching network comprises a tunable reactive element; and a controller coupled with the matching network and with the RF switch, wherein the controller receives first reflection measurements associated with the antenna system, wherein the controller adjusts the tunable reactive element according to the first reflection measurements to provide impedance tuning, wherein the controller adjusts the RF switch to select between the first and second positions according to the first reflection measurements, wherein the controller adjusts the RF switch to select between the first and second positions according to the first reflection measurements and a distance measured from free space designated on a stored tuning grid. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9)
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7. (canceled)
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10. A method comprising:
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obtaining, by a controller of a communication device, first reflection measurements for a first antenna of the communication device operating as a primary antenna when an RF switch of the communication device is in a first position; adjusting, by the controller, a tunable reactive element of a matching network according to the first reflection measurements to perform impedance tuning; analyzing, by the controller, the first reflection measurements to determine a desired antenna for transmission; switching, by the controller, the RF switch to a second position responsive to a determination that a second antenna of the communication device is the desired antenna for transmission, wherein the switching to the second position causes the second antenna to operate as the primary antenna; obtaining, by the controller, second reflection measurements for the second antenna operating as the primary antenna when the RF switch is in the second position; adjusting, by the controller, the tunable reactive element according to the second reflection measurements to perform the impedance tuning; analyzing, by the controller, the second reflection measurements to determine the desired antenna for transmission; and switching, by the controller, the RF switch to the first position responsive to a determination that the first antenna is the desired antenna for transmission, wherein the controller adjusts the RF switch to select the second position according to the first reflection measurements and a stored efficiency value corresponding to a location on a two-dimensional tuning grid. - View Dependent Claims (11, 12, 13)
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14. (canceled)
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15. A communication device, comprising:
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a modem; a transceiver; an antenna system coupled with the transceiver, wherein the antenna system includes a first antenna and a second antenna, wherein one of the first or second antennas is operating as a primary antenna and another of the first or second antennas is operating as a diversity antenna; an RF switch connected with the antenna system, wherein the RF switch has a first position in which the first antenna is the primary antenna and the second antenna is the diversity antenna, and wherein the RF switch has a second position in which the second antenna is the primary antenna and the first antenna is the diversity antenna; and a controller coupled with the RF switch, wherein the controller receives first reflection measurements associated with the antenna system, wherein the controller adjusts the RF switch to select between the first and second positions according to the first reflection measurements and during a time period in which the modem enables an antenna switch, wherein the controller adjusts the RF switch to select between the first and second positions according to the first reflection measurements and a stored efficiency value corresponding to a location on a tuning grid. - View Dependent Claims (16, 17, 18, 19)
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20. (canceled)
Specification