High efficiency amplifier and method of designing same
First Claim
Patent Images
1. An amplifier comprising:
- a main amplifier circuit;
at least one auxiliary amplifier circuit, the auxiliary amplifier circuit being selectively operable to operate in combination with the main amplifier circuit;
at least one hybrid coupler circuit having an output port and an isolation port and coupled to combine output signals of the amplifiers at the coupler output port;
the amplifier circuits having associated reflection coefficients (┌
out) at their outputs looking into the outputs of the amplifier circuits;
a termination coupled at the isolation port of the coupler circuit, the termination being selected so the reflection coefficient of the termination (┌
Y), looking into the termination, is based upon the reflection coefficient at the outputs of the amplifier circuits according to the following relationship;
ang(┌
Y)=180°
−
ang(┌
out).
15 Assignments
0 Petitions
Accused Products
Abstract
An amplifier includes a main amplifier circuit and at least one auxiliary amplifier circuit. Portions of an RF signal to be amplified are delivered to the main and auxiliary amplifiers. The auxiliary amplifier circuit is selectively operable to operate in combination with the main amplifier circuit, such as based on the level of the RF signal. At least one hybrid coupler circuit has input ports coupled with outputs of the main amplifier circuit and auxiliary amplifier circuit. The hybrid coupler circuit is operable to combine amplifier circuit output signals at a coupler first output port. A coupler second output port is terminated with one of an electrical short and an electrical open circuit.
-
Citations
38 Claims
-
1. An amplifier comprising:
-
a main amplifier circuit; at least one auxiliary amplifier circuit, the auxiliary amplifier circuit being selectively operable to operate in combination with the main amplifier circuit; at least one hybrid coupler circuit having an output port and an isolation port and coupled to combine output signals of the amplifiers at the coupler output port; the amplifier circuits having associated reflection coefficients (┌
out) at their outputs looking into the outputs of the amplifier circuits;a termination coupled at the isolation port of the coupler circuit, the termination being selected so the reflection coefficient of the termination (┌
Y), looking into the termination, is based upon the reflection coefficient at the outputs of the amplifier circuits according to the following relationship;
ang(┌
Y)=180°
−
ang(┌
out). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 12, 13, 14, 15, 29, 30)
-
-
9. An amplifier comprising:
-
a plurality of amplifier circuits having associated reflection coefficients at their outputs; at least one hybrid coupler circuit having an output port and an isolation port and coupled to combine output signals of the amplifier circuits at the coupler output port;
a termination coupled at the isolation port of the coupler circuit, the termination selected so the reflection coefficient of the termination (┌
Y), looking into the termination, is based upon the reflection coefficient (┌
out) at the outputs of the amplifier circuits, looking into the outputs of the amplifier circuits according to one of the following relationships;
ang(┌
Y)=180°
−
ang(┌
out) and
ang(┌
Y)=−
ang(┌
out). - View Dependent Claims (10, 11, 16)
-
-
17. A method of configuring an amplifier comprising:
-
combining output signals of a main amplifier circuit and at least one auxiliary amplifier circuit with at least one hybrid coupler circuit having an output port and an isolation port, and providing an output at an output port of the coupler circuit; the main and auxiliary amplifier circuits having associated reflection coefficients (┌
out) at their outputs, looking into the outputs of the amplifier circuits;coupling a termination at the isolation port of the coupler circuit;
selecting the termination to have a reflection coefficient (┌
Y), looking into the termination, that is based upon the reflection coefficient at the outputs of the amplifier circuits according to the following relationship;
ang(┌
Y)=180°
−
ang(┌
out). - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
-
-
25. An amplifier comprising:
-
a main amplifier circuit; at least one auxiliary amplifier circuit, the auxiliary amplifier circuit being selectively operable to operate in combination with the main amplifier circuit; at least one hybrid coupler circuit having an output port and an isolation port and coupled to combine output signals of the amplifiers at the coupler output port; the amplifier circuits having associated reflection coefficients (┌
out) at their outputs looking into the outputs of the amplifier circuits;a termination coupled at the isolation port of the coupler circuit, the termination being selected so the reflection coefficient of the termination (┌
Y), looking into the termination, is based upon the reflection coefficient at the outputs of the amplifier circuits according to the following relationship;
ang(┌
Y)=−
ang(┌
out). - View Dependent Claims (26, 27, 28)
-
-
31. A method of configuring an amplifier comprising:
-
combining output signals of a main amplifier circuit and at least one auxiliary amplifier circuit with at least one hybrid coupler circuit having an output port and an isolation port, and providing an output at an output port of the coupler circuit; the main and auxiliary amplifier circuits having associated reflection coefficients (┌
out) at their outputs, looking into the outputs of the amplifier circuits;coupling a termination at the isolation port of the coupler circuit;
selecting the termination to have a reflection coefficient (┌
Y), looking into the termination, that is based upon the reflection coefficient at the outputs of the amplifier circuits according to the following relationship;
ang(┌
Y)=−
ang(┌
Y). - View Dependent Claims (32, 33, 34, 35, 36, 37, 38)
-
Specification