Dynamic amplifier supply in a phased antenna array
Apparatuses and methods for adjusting a power capability of a system is described. In an example, a system can include an antenna array and a beamformer connected to the antenna array. The beamformer can include a communication channel. The system can further include a first power converter that can be configured to convert a supply voltage to a first regulated voltage. The first power converter can apply the first regulated voltage to the beamformer. The system can further include a second power converter that can be configured to convert the supply voltage to a second regulated voltage different from the first regulated voltage. The second power converter can apply the second regulated voltage to a power amplifier in the communication channel to adjust a maximum power capability of the power amplifier.
1. An apparatus comprising:
a controller configured to:
configure a power capability of a power amplifier in a communication channel of a beamformer by:
determining a maximum power capability for the power amplifier;
determining, based on the maximum power capability, a regulated voltage to be supplied to the power amplifier; and
causing a power converter to:
convert a supply voltage to the regulated voltage; and
supply the regulated voltage to the power amplifier.
2. The apparatus of claim 1 , wherein the regulated voltage is different from a main regulated voltage being applied to the beamformer.
3. The apparatus of claim 1 , wherein the power amplifier is a final power amplifier stage of the communication channel.
4. The apparatus of claim 1 , wherein the controller is further configured to:
determine, based on the maximum power capability or the regulated voltage, a bias current to be supplied to the power amplifier; and
cause the bias current to be supplied to the power amplifier.
5. The apparatus of claim 4 , wherein the controller is further configured to cause the bias current to increase in response to an increase of the maximum power capability or the regulated voltage.
6. The apparatus of claim 1 , wherein:
the power amplifier is a cascode amplifier; and
the controller is further configured to:
determine, based on the maximum power capability or the regulated voltage, a bias voltage to be supplied to the cascode amplifier; and
cause the bias voltage to be applied to an upper switching element of the cascode amplifier.
7. The apparatus of claim 1 , wherein the communication channel is a transmission channel of the beamformer.
8. The apparatus of claim 1 , wherein the controller is further configured to determine the maximum power capability for the power amplifier based on
a desired tapering configuration of the beamformer.
9. A system comprising:
an antenna array;
a beamformer connected to the antenna array, the beamformer comprising a communication channel with a power amplifier;
a first power converter configured to:
convert a supply voltage to a first regulated voltage; and
apply the first regulated voltage to the beamformer; and
a controller configured to:
configure a power capability of the power amplifier by:
determining a maximum power capability for the power amplifier;
determining, based on the maximum power capability, a second regulated voltage to be supplied to the power amplifier; and
causing a second power converter to:
convert the supply voltage to the second regulated voltage; and
supply the second regulated voltage to the power amplifier.
10. The system of claim 9 , wherein the power amplifier is a final power amplifier stage of the communication channel.
11. The system of claim 9 , wherein the controller is further configured to:
determine, based on the maximum power capability or the second regulated voltage, a bias current to be supplied to the power amplifier; and
cause the bias current to be supplied to the power amplifier.
12. The system of claim 9 , wherein:
the power amplifier is a cascode amplifier; and
the controller is further configured to cause a bias voltage generator to apply a bias voltage to an upper switching element of the cascode amplifier based on the second regulated voltage.
13. The system of claim 9 , wherein the communication channel is a transmission channel of the beamformer.
14. The system of claim 9 , wherein the controller is further configured to
determine the maximum power capability for the power amplifier based on a desired tapering configuration of the beamformer.
15. The system of claim 9 , further comprising a transmitter connected to the beamformer.
16. The system of claim 9 , further comprising a transceiver connected to the beamformer.
17. A method of operating a beamformer, the method comprising:
configuring a power capability of a power amplifier in a communication channel of the beamformer by:
determining a maximum power capability for the power amplifier;
determining, based on the maximum power capability, a regulated voltage to be supplied to the power amplifier; and
causing a second power converter to:
convert a supply voltage to the regulated voltage; and
supply the regulated voltage to the power amplifier.
18. The method of claim 17 , further comprising:
determining, based on at least one of the maximum power capability or the regulated voltage, a bias current for the power amplifier;
causing a current generator to:
generate the bias current; and
apply the the bias current to the power amplifier.
19. The method of claim 17 , wherein:
the power amplifier is a cascode amplifier; and
the method further comprises:
determining, based on the maximum power capability or the regulated voltage, a bias voltage for the power amplifier; and
causing a bias voltage generator to:
generate the bias voltage; and
apply the bias voltage to an upper switching element of the cascode amplifier.
20. The method of claim 17 ,
wherein the determining the maximum power capability is based on a desired tapering configuration of the beamformer.