DOHERTY AMPLIFIER WITH COMPLEX COMBINING LOAD MATCHING CIRCUIT

DOHERTY AMPLIFIER WITH COMPLEX COMBINING LOAD MATCHING CIRCUIT

A Doherty power amplifier includes input circuitry that provides input signals to carrier and peaking amplifiers with an input phase offset between 20 degrees and 160 degrees. Carrier and peaking amplifier output signals are combined at a combining node. A complex combining load matching circuit, wh...

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Hauptverfasser: McLaren, Roy, Ramanujam, Srinidhi Embar
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Sprache:eng ; fre ; ger
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AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
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Ramanujam, Srinidhi Embar
description A Doherty power amplifier includes input circuitry that provides input signals to carrier and peaking amplifiers with an input phase offset between 20 degrees and 160 degrees. Carrier and peaking amplifier output signals are combined at a combining node. A complex combining load matching circuit, which is connected to the combining node, consists of two, series-connected transmission line segments. The matching circuit provides a complex impedance, ZL, with a non-zero reactive portion, xn. The output circuit between the peaking amplifier and the combining node has an electrical length of 0 or n∗180 degrees (n = an integer value). The output circuit between the carrier amplifier and the combining node has an electrical length, θx, equal to an absolute value of the input phase offset when the electrical length of the peaking output circuit is 0 degrees.
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subjects AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
title DOHERTY AMPLIFIER WITH COMPLEX COMBINING LOAD MATCHING CIRCUIT
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