V-band high-power transmitter with integrated power combiner
AssigneeTialinx, Inc.
InventorsMohsen Zolghadri, Farrokh Mohamadi
Life of this patent
Estimating the term…
Abstract
A wireless communications system includes a first multiplexer distribution network fed by a radio frequency input; a plurality of multi-stage power amplifiers fed by the first multiplexer distribution network, wherein each one of the multi-stage power amplifiers includes: a pre-distortion linearizer fed from the first distribution network; a first combiner receiving input from the pre-distortion linearizer; a second combiner; a plurality of power amplifier cells fed by the first combiner and feeding the second combiner; and a second multiplexer distribution network, wherein the second multiplexer distribution network is fed by the second combiner and feeds a radio frequency output.
Claims14
A wireless communications system comprising:
- a first multiplexer distribution network fed by a radio frequency input;
- a plurality of multi-stage broadband power amplifiers fed by the first multiplexer distribution network, wherein each one of the multi-stage broadband power amplifiers includes:
- a pre-distortion linearizer fed from the first distribution network;
- a splitter receiving input from the pre-distortion linearizer;
- a combiner;
- a plurality of power amplifier cells fed by the splitter and feeding the combiner;
- and
- a second multiplexer distribution network, wherein the second multiplexer distribution network is fed by the combiner and feeds a radio frequency output.
A solid state power amplifier comprising:
- a splitting network having an input and plurality of outputs, wherein each splitting network output is selective of a channel of a full bandwidth;
- a plurality of pre-distortion linearizers each fed through one of a plurality of drivers from one output of the splitting network;
- a divider fed from one of the pre-distortion linearizers;
- a power amplifier fed from the divider and comprising a carrier amplifier and a peaking amplifier connected in a Doherty configuration, wherein the carrier amplifier is configured to operate in class B/AB and the peaking amplifier is configured to operate in class C;
- a combiner fed from the power amplifier;
- and
- a combining network having an input fed from the combiner, the combining network having a plurality of inputs and configured to combine signal power from the plurality of channels input into a signal output comprising the full bandwidth.
A method of amplifying a wideband radio frequency signal, comprising:
- splitting the wideband radio frequency signal to a plurality of narrow band pre-distortion linearizers;
- pre-distorting the radio frequency signal to create a gain expansion inverse to a compression point in a power amplifier;
- splitting the pre-distorted signal among a plurality of power amplifiers;
- amplifying the split signal using a carrier amplifier and peaking amplifier transistor pair;
- combining the amplified signal using one of a plurality of combiners;
- and
- combining signals output from the plurality of combiners into an output signal.
Dependencies are inferred from the claim text.