Adaptive antenna diversity system
First Claim
1. An electronic device, comprising:
- first and second cellular telephone antennas;
radio-frequency transceiver circuitry that transmits and receives radio-frequency signals through the cellular telephone antennas, wherein the radio-frequency transceiver circuitry has a first receiver that is associated with a first transceiver port and a second receiver that is associated with a second transceiver port; and
switching circuitry interposed between the radio-frequency transceiver circuitry and the first and second cellular telephone antennas;
control circuitry configured to change the switching circuitry from a first state, in which the first cellular telephone antenna is coupled to the first receiver and the second cellular telephone antenna is coupled to the second receiver, to a second state, in which the first cellular telephone antenna is coupled to the second receiver and the second cellular telephone antenna is coupled to the first receiver, in response to determining that the performance of the second cellular telephone antenna is superior to the performance of the first cellular telephone antenna;
wherein the determining that the performance of the second cellular telephone antenna is superior to the performance of the first cellular telephone antenna is based at least partly on, during a transmission by the radio-frequency transceiver on at least one of the antennas, detecting that power being transmitted by the radio-frequency transceiver through the first antenna during the transmission exceeds a threshold.
1 Assignment
0 Petitions
Accused Products
Abstract
Electronic devices may be provided that contain wireless communications circuitry. The wireless communications circuitry may include radio-frequency transceiver circuitry with first and second ports that are coupled by switching circuitry to first and second antennas. A first receiver in the transceiver circuitry may be associated with the first port and a second receiver in the transceiver circuitry may be associated with the second port. An electronic device may be operated in a single receiver mode in which only one of the receivers is active to conserve power or a dual receiver mode in which signals from both antennas may be received in parallel to compare antenna performance. Based on antenna performance metrics, the electronic device may adjust the switching circuitry to ensure that an optimal antenna is being used.
28 Citations
26 Claims
-
1. An electronic device, comprising:
-
first and second cellular telephone antennas; radio-frequency transceiver circuitry that transmits and receives radio-frequency signals through the cellular telephone antennas, wherein the radio-frequency transceiver circuitry has a first receiver that is associated with a first transceiver port and a second receiver that is associated with a second transceiver port; and switching circuitry interposed between the radio-frequency transceiver circuitry and the first and second cellular telephone antennas; control circuitry configured to change the switching circuitry from a first state, in which the first cellular telephone antenna is coupled to the first receiver and the second cellular telephone antenna is coupled to the second receiver, to a second state, in which the first cellular telephone antenna is coupled to the second receiver and the second cellular telephone antenna is coupled to the first receiver, in response to determining that the performance of the second cellular telephone antenna is superior to the performance of the first cellular telephone antenna; wherein the determining that the performance of the second cellular telephone antenna is superior to the performance of the first cellular telephone antenna is based at least partly on, during a transmission by the radio-frequency transceiver on at least one of the antennas, detecting that power being transmitted by the radio-frequency transceiver through the first antenna during the transmission exceeds a threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method of operating an electronic device that has cellular telephone antennas and wireless circuitry that includes first and second receivers that receive radio-frequency signals from the cellular telephone antennas, comprising:
-
selectively configuring the wireless circuitry to operate in a single receiver mode in which the first receiver is active and is receiving the radio-frequency signals while the second receiver is inactive and a dual receiver mode in which the first and second receivers are active and are receiving the radio-frequency signals, wherein the first receiver receives radio-frequency signals from a first of the cellular telephone antennas while the second receiver receives radio-frequency signals from a second of the cellular telephone antennas when the wireless circuitry is configured to operate in the dual receiver mode; comparing, while operating in the dual receiver mode, performance of the first antenna and performance of the second antenna; and in response to determining that the performance of the second antenna is greater than the performance of the first antenna by more than a predetermined threshold amount, adjusting the wireless circuitry so that the first receiver receives radio-frequency signals from the second antenna while the second receiver receives radio-frequency signals from the first antenna; wherein the determining that the performance of the second antenna is greater than the performance of the first antenna adjusting the wireless circuitry is based at least partly on, during a transmission by the radio-frequency transceiver on at least one of the antennas, detecting that power being transmitted by the radio-frequency transceiver through the first antenna during the transmission exceeds a threshold. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
-
-
22. A method of operating an electronic device that has antennas and that has radio-frequency transceiver circuitry with first and second receivers, comprising:
-
comparing, while operating the electronic device wherein the first and second receivers are active and are each receiving radio-frequency signals, performance of the first antenna and performance of the second antenna; and in response to determining that the performance of the second antenna is greater than the performance of the first antenna by more than a predetermined threshold amount, adjusting the switching circuitry from a first state, in which a first of the antennas which serves as a primary antenna in the electronic device is coupled to the first receiver while a second of the antennas which serves as a secondary antenna in the electronic device is coupled to the second receiver, to a second state, in which the second antenna is coupled to the first receiver while the first antenna is coupled to the second receiver; wherein the determining that the performance of the second antenna is greater than the performance of the first antenna is based at least partly on, during a transmission by the radio-frequency transceiver on at least one of the antennas, detecting that power being transmitted by the radio-frequency transceiver through the first antenna during the transmission exceeds a threshold. - View Dependent Claims (23, 24, 25)
-
-
26. An electronic device, comprising:
-
first and second cellular telephone antennas; radio-frequency transceiver circuitry that transmits and receives radio-frequency signals through the cellular telephone antennas, wherein the radio-frequency transceiver circuitry has a first receiver that is associated with a first transceiver port and a second receiver that is associated with a second transceiver port; and switching circuitry interposed between the radio-frequency transceiver circuitry and the first and second cellular telephone antennas; control circuitry configured to change the switching circuitry from a first state, in which the first cellular telephone antenna is coupled to the first receiver and the second cellular telephone antenna is coupled to the second receiver, to a second state, in which the first cellular telephone antenna is coupled to the second receiver and the second cellular telephone antenna is coupled to the first receiver, in response to determining that the performance of the second cellular telephone antenna is superior to the performance of the first cellular telephone antenna; wherein in each of the first state and the second state, the first and second cellular telephone antennas each operate according to a first cellular radio access technology (RAT) on a common frequency band.
-
Specification