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1. WO2020089405 - A RADIO FREQUENCY POWER AMPLIFIER

Publication Number WO/2020/089405
Publication Date 07.05.2020
International Application No. PCT/EP2019/079858
International Filing Date 31.10.2019
IPC
H03F 3/60 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
60Amplifiers in which coupling networks have distributed constants, e.g. with waveguide resonators
H03F 1/56 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
56Modifications of input or output impedances, not otherwise provided for
H03F 1/02 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
02Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
CPC
H03F 1/0288
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
02Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
0205in transistor amplifiers
0288using a main and one or several auxiliary peaking amplifiers whereby the load is connected to the main amplifier using an impedance inverter, e.g. Doherty amplifiers
H03F 1/56
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
56Modifications of input or output impedances, not otherwise provided for
H03F 2200/192
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2200Indexing scheme relating to amplifiers
192A hybrid coupler being used at the input of an amplifier circuit
H03F 2200/198
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2200Indexing scheme relating to amplifiers
198A hybrid coupler being used as coupling circuit between stages of an amplifier circuit
H03F 2200/204
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2200Indexing scheme relating to amplifiers
204A hybrid coupler being used at the output of an amplifier circuit
H03F 2200/321
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2200Indexing scheme relating to amplifiers
321Use of a microprocessor in an amplifier circuit or its control circuit
Applicants
  • LEONARDO MW LIMITED [GB]/[GB]
Inventors
  • SHEPPHARD, Daniel
  • CRIPPS, Steven
  • POWELL, Jeffrey
  • QUAGLIA, Roberto
Agents
  • TOLFREE, Adam
Priority Data
1817747.731.10.2018GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) A RADIO FREQUENCY POWER AMPLIFIER
(FR) AMPLIFICATEUR DE PUISSANCE RADIOFRÉQUENCE
Abstract
(EN)
A balanced amplifier system (1) having input and output quadrature couplers (2, 3) or equivalents thereof and two amplifiers (4, 5) there between. An RF signal is presented to a first input of an input quadrature coupler (2) such that an amplified RF signal is output at a first output of the output quadrature coupler (3). A RF control signal is presented to a second input of the quadrature coupler (2) such that an amplified control signal is outputted at the other output of the output quadrature coupler (3). The system (1) further comprises means (13) to reflect the amplified signal back into the second port of the output quadrature coupler (3) in order to vary the impedance seen by the amplifiers of the balanced amplifier system (1).
(FR)
La présente invention concerne un système amplificateur équilibré (1) comprenant des coupleurs en quadrature d'entrée et de sortie (2, 3) ou leurs équivalents et deux amplificateurs (4, 5) entre eux. Un signal RF est présenté à une première entrée d'un coupleur en quadrature d'entrée (2) de telle sorte qu'un signal RF amplifié soit émis au niveau d'une première sortie du coupleur en quadrature de sortie (3). Un signal de commande RF est présenté à une seconde entrée du coupleur en quadrature (2) de telle sorte qu'un signal de commande amplifié soit émis au niveau de l'autre sortie du coupleur en quadrature de sortie (3). Le système (1) comprend en outre des moyens (13) destinés à renvoyer le signal amplifié dans le second port du coupleur en quadrature de sortie (3) afin de faire varier l'impédance perçue par les amplificateurs du système amplificateur équilibré (1).
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