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1. (WO2018033711) LOAD MODULATION IN SIGNAL TRANSMISSION

Pub. No.:    WO/2018/033711    International Application No.:    PCT/GB2017/052381
Publication Date: Fri Feb 23 00:59:59 CET 2018 International Filing Date: Sat Aug 12 01:59:59 CEST 2017
IPC: H03F 1/02
H03F 1/32
H03F 1/56
H03F 3/24
H04B 1/04
Applicants: AIRBUS DEFENCE AND SPACE LIMITED
Inventors: ABOUELENIN, Ahmed
Title: LOAD MODULATION IN SIGNAL TRANSMISSION
Abstract:
A transmitter for transmitting a signal is provided, in which the transmitter comprises a power amplifier (54) and a driver amplifier (59), an output of the driver amplifier (54) being connected to an input of the power amplifier 854) via a first load modulation device (63) operable to match the impedance of the driver amplifier output with the impedance of the power amplifier input, further comprising a second load modulation device (64) connected to the output of the power amplifier and operable to match the impedance of the power amplifier output with the input impedance of a further device (66), and means for applying envelope tracking (70) to the power amplifier (54) and the driving amplifier (59).