Method and apparatus for antenna selection
First Claim
1. A mobile device, comprising:
- an RF switch that, when connected with an antenna system having a first antenna and a second antenna, has a first position in which the first antenna is operating as a primary antenna and the second antenna is operating as a diversity antenna, and wherein the RF switch has a second position in which the second antenna is operating as the primary antenna and the first antenna is operating as the diversity antenna;
a matching network coupled with a transceiver and the antenna system, wherein the matching network comprises a tunable reactive element; and
a controller that when coupled with the matching network and with the RF switch, receives first measurements associated with the antenna system,wherein the controller adjusts the tunable reactive element according to the first measurements to provide impedance tuning,wherein the controller adjusts the RF switch to select between the first and second positions according to the first measurements,wherein the controller applies the first measurements to a two-dimensional tuning grid to obtain an application to the two-dimensional tuning grid, and wherein the controller adjusts the RF switch to select between the first and second positions based on the application to the two-dimensional tuning grid.
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Accused Products
Abstract
A system that incorporates teachings of the subject disclosure may include, for example, a system including an RF switch connected with an antenna system that includes a first antenna and a second antenna. The system can include, where the RF switch has a first position in which the first antenna operates as the primary antenna and the second antenna operates as the diversity antenna, and wherein the RF switch has a second position in which the second antenna operates as the primary antenna and the first antenna operates as the diversity antenna. The system can include a controller coupled with the matching network and with the RF switch, where the controller receives first 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 measurements.
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Citations
20 Claims
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1. A mobile device, comprising:
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an RF switch that, when connected with an antenna system having a first antenna and a second antenna, has a first position in which the first antenna is operating as a primary antenna and the second antenna is operating as a diversity antenna, and wherein the RF switch has a second position in which the second antenna is operating as the primary antenna and the first antenna is operating as the diversity antenna; a matching network coupled with a transceiver and the antenna system, wherein the matching network comprises a tunable reactive element; and a controller that when coupled with the matching network and with the RF switch, receives first measurements associated with the antenna system, wherein the controller adjusts the tunable reactive element according to the first measurements to provide impedance tuning, wherein the controller adjusts the RF switch to select between the first and second positions according to the first measurements, wherein the controller applies the first measurements to a two-dimensional tuning grid to obtain an application to the two-dimensional tuning grid, and wherein the controller adjusts the RF switch to select between the first and second positions based on the application to the two-dimensional tuning grid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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obtaining, by a controller, first measurements for a first antenna of a 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 measurements to perform impedance tuning; switching, by the controller, the RF switch to a second position, wherein the switching to the second position causes a second antenna to operate as the primary antenna; obtaining, by the controller, second 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 measurements to perform the impedance tuning; determining efficiency values for the first antenna and the second antenna; analyzing, by the controller, the first measurements and the second measurements based on the efficiency values to determine a particular one of the first and second antennas for transmission; and switching, by the controller, the RF switch to the first position responsive to a determination that the first antenna is the particular one of the first and second antennas for transmission. - View Dependent Claims (12, 13, 14, 15)
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16. A device, comprising:
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an RF switch connected with an antenna system having a first antenna and a second antenna, wherein the RF switch has a first position in which the first antenna is operating as a primary antenna and the second antenna is operating as a 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 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 measurements, wherein the controller adjusts the RF switch to select between the first and second positions according to the first measurements and a stored efficiency value, wherein the controller adjusts the RF switch to select between the first and second positions according to the first measurements and one of a stored free space reference value or a distance measured from free space designated on a stored tuning grid, and wherein the stored tuning grid comprises a uniform tuning grid. - View Dependent Claims (17, 18, 19, 20)
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Specification