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US 10,897,162 B2Granted
Antenna array element by element power tracking
AssigneepSemi Corporation
InventorsDonald Felt Kimball, Mark James O'Leary
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Abstract
Methods and devices addressing power tracking of transmission systems using antenna arrays are disclosed. The disclosed teachings may be implemented on a channel element to channel element basis, are adaptive and can be implemented on short time durations such as time slots. Power efficiency can be improved when applying the described methods to the design of systems with antenna arrays.
Claims18
A method of power tracking in a wireless transmission system with an antenna array comprising:
- for each array element of the antenna array, providing a corresponding power amplifier to feed the array element, each power amplifier switchably connected to at least two bias voltages provided by at least two separate power supplies to implement a power-level handling capability with at least two power levels;
- adjusting transmitted power of the power amplifiers according to one or more spatial dimensions applied across the antenna array;
- for each power amplifier, biasing the power amplifier with one of the at least two bias voltages such that a maximum power handled by the power amplifier is substantially equal to or higher than the transmitted power of the power amplifier.
A wireless transmission system comprising:
- an antenna array;
- a plurality of power amplifiers, each power amplifier of the plurality of the power amplifiers feeding a corresponding antenna of the antenna array;
- and
- a plurality of switch blocks connected to the plurality of power amplifiers, each switch block comprising a plurality of switches;
- wherein:
- the plurality of power amplifiers are configured to transmit power according to one or more spatial dimensions applied across the antenna array;
- when a first switch of the plurality of switches is closed and all other switches are open, a corresponding amplifier of the plurality of amplifiers is configured to receive a first bias voltage from a first power supply such that a maximum power handled by the amplifier of the plurality of amplifiers is substantially equal to or larger than a first transmitted power of the power amplifier, and
- when a second switch of the plurality of switches is closed and all other switches are open, the amplifier of the plurality of amplifiers is configured to receive a second bias voltage from a second power supply different from the first power supply such that the maximum power handled by the amplifier of the plurality of amplifiers is substantially equal to or larger than a second transmitted power of the power amplifier.
5 more elements
A wireless transmission system comprising:
- an antenna array;
- a plurality of power amplifiers, each power amplifier of the plurality of the power amplifiers feeding a corresponding antenna of the antenna array;
- and
- a plurality of switch blocks connected with the plurality of power amplifiers, each switching block comprising a switch in parallel with a diode
- wherein:
- when the switch is in a first state, each power amplifier of the plurality of amplifiers is configured to receive a first bias voltage;
- when the switch is in a second state, each amplifier of the plurality is configured to be connected to a second bias voltage via the diode;
- and the first voltage is smaller than the second voltage.
5 more elements
Dependencies are inferred from the claim text.