Radio frequency handset calibration based on antenna gain
A radio frequency device includes antennas, transmitters, power detectors, a memory storing instructions and an antenna gain lookup table, and processors. The processors execute instructions that include instructing the transmitters to send transmission signals through the antennas to form a first beamformed signal having a first beam direction and a first frequency using multiple input powers. The instructions include determining radio frequency integrated circuit (RFIC) gains associated with the transmitters based on the transmission signals using the power detectors. Moreover, the instructions include determining the antenna gains for the antennas based on the first beam direction and the first frequency of the first beamformed signal, and the antenna gain lookup table. The instructions also include determining total gains based on the RFIC gains and the antenna gains, and adjusting the input powers based on the total gains and a back off power signal.
1. A radio frequency device comprising:
a transmitter chain configured to transmit a transmission signal at an input power via a first antenna of a plurality of antennas to form a beamformed signal having a first beam direction at a first frequency;
a memory configured to store a plurality of antenna gains for the plurality of antennas associated with beamforming; and
processing circuitry communicatively coupled to the transmitter chain and the memory, the processing circuitry configured to
receive a radio frequency integrated circuit (RFIC) gain associated with the first antenna based on a back off power signal,
receive a first antenna gain associated with the first antenna based on the first beam direction, the first frequency, and the plurality of antenna gains, and
cause the transmitter chain to adjust the input power based on the RFIC gain, the first antenna gain, and the back off power signal.
2. The radio frequency device of claim 1 , wherein the processing circuitry is configured to determine a total transmission gain associated with the first antenna based on the RFIC gain and the first antenna gain.
3. The radio frequency device of claim 2 , wherein the processing circuitry is configured to cause the transmitter chain to adjust the input power based on a difference between the back off power signal and the total transmission gain.
4. The radio frequency device of claim 1 , wherein the processing circuitry is configured to
receive a second antenna gain associated with the first antenna based on the plurality of antenna gains and a second beam direction different than the first beam direction, and
determine the second beam direction as providing a stronger signal strength for transmitting the transmission signal than the first beam direction based on the second antenna gain.
5. The radio frequency device of claim 4 , wherein the processing circuitry is configured to control a transmitter phase shifter of the transmitter chain to steer the beamformed signal to the second beam direction.
6. The radio frequency device of claim 1 , wherein the processing circuitry is configured to receive a second antenna gain associated with the first antenna based on the plurality of antenna gains, the first beam direction, and a second frequency different than the first frequency, and
determine the first beam direction at the second frequency as providing a stronger signal strength for transmitting the transmission signal than the first beam direction at the first frequency based on the second antenna gain.
7. The radio frequency device of claim 1 , wherein the processing circuitry is configured to receive the RFIC gain prior to the gain being amplified by the first antenna.
8. The radio frequency device of claim 1 , wherein the processing circuitry is configured to receive the RFIC gain prior to the gain being amplified by a power amplifier.
9. The radio frequency device of claim 1 , wherein the plurality of antennas comprises a second antenna, and the plurality of antenna gains comprises a second antenna gain associated with the second antenna for the first beam direction at the first frequency different than the first antenna gain.
10. The radio frequency device of claim 1 , wherein the memory is configured to store a plurality of RFIC gains for the plurality of antennas associated with the beamforming.
11. The radio frequency device of claim 1 , wherein the first frequency of the beamformed signal is within a millimeter wave frequency range.
12. The radio frequency device of claim 1 , wherein the processing circuitry is configured to cause the transmitter chain to adjust the input power to a power level indicated in a single adjustment.
13. The radio frequency device of claim 1 , wherein the processing circuitry is configured to receive the back off power signal based on the plurality of antennas being within a threshold range of a user.
14. The radio frequency device of claim 1 , wherein the processing circuitry is configured to control a power amplifier supply voltage provided to a power amplifier of the transmitter chain to cause the transmitter chain to adjust the input power.
15. The radio frequency device of claim 14 , wherein the memory is configured to store the power amplifier supply voltage.
16. A tangible, non-transitory, computer-readable medium, comprising instructions that, when executed by a processor, cause operations to be performed comprising:
transmitting a transmission signal at an input power via an antenna of a plurality of antennas to form a beamformed signal having a beam direction at a frequency;
receiving a radio frequency integrated circuit (RFIC) gain associated with the antenna based on receiving a back off power signal;
receiving an antenna gain associated with the antenna based on the beam direction, the frequency, and a plurality of antenna gains for the plurality of antennas associated with beamforming; and
causing a transmitter chain to adjust the input power based on the RFIC gain, the antenna gain, and the back off power signal.
17. The tangible, non-transitory, computer-readable medium of claim 16 , the operations comprising determining a total transmission gain associated with the antenna based on the RFIC gain and the antenna gain.
18. A radio frequency device comprising:
a first transmitter chain configured to transmit a first transmission signal via a first antenna of a plurality of antennas;
a second transmitter chain configured to transmit a second transmission signal via a second antenna of the plurality of antennas to form a beamformed signal with the first transmission signal; and
a memory configured to store an antenna gain data structure including a plurality of antenna gains for the plurality of antennas associated with a beam direction at a particular frequency, wherein the plurality of antenna gains is indexed using a total transmission power parameter.
19. The radio frequency device of claim 18 , wherein the memory is configured to store a second antenna gain data structure including a second plurality of antenna gains associated with a second beam direction at a second particular frequency.
20. The radio frequency device of claim 18 , comprising a radio frequency integrated circuit (RFIC), the RFIC comprising the first transmitter chain and configured to provide an RFIC gain, the first antenna being configured to provide an antenna gain, and the plurality of antenna gains comprising the antenna gain.