Harmonic matching network for a saturated amplifier
First Claim
Patent Images
1. A transmitter power amplifier for converting power from a direct current (DC) supply to radio frequency power (RF) in a load resistance, comprising:
- an amplifier comprising at least one active output device, the amplifier having an output capacitance; and
a harmonic terminating and impedance matching network comprising a plurality of sections coupled between said amplifier and the load resistance, a first section nearest said amplifier creating an impedance at the at least one active output device which is resonant with said output capacitance at a highest harmonic frequency and compensates for said output capacitance to produce a high impedance at said highest harmonic frequency, and a second section nearest the load resistance creating an impedance at said at least one active output device which resonates with said output capacitance at a lowest harmonic frequency and compensates for said output capacitance to produce a high impedance at said lowest harmonic frequency.
4 Assignments
0 Petitions
Accused Products
Abstract
Systems and methods for increasing the efficiency of direct current (DC) power to radio frequency (RF) power include a harmonic matching network that inhibits harmonic current flow for a number of harmonic frequencies. The matching network includes a number of sections, where each section generates an impedance that resonates with the output capacitance at a harmonic frequency. Each section of the matching network also creates a high impedance to the amplifier at the respective odd harmonic frequency.
81 Citations
24 Claims
-
1. A transmitter power amplifier for converting power from a direct current (DC) supply to radio frequency power (RF) in a load resistance, comprising:
-
an amplifier comprising at least one active output device, the amplifier having an output capacitance; and
a harmonic terminating and impedance matching network comprising a plurality of sections coupled between said amplifier and the load resistance, a first section nearest said amplifier creating an impedance at the at least one active output device which is resonant with said output capacitance at a highest harmonic frequency and compensates for said output capacitance to produce a high impedance at said highest harmonic frequency, and a second section nearest the load resistance creating an impedance at said at least one active output device which resonates with said output capacitance at a lowest harmonic frequency and compensates for said output capacitance to produce a high impedance at said lowest harmonic frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21)
-
-
17. In a mobile terminal comprising an amplifier having an output capacitance, a method comprising:
-
converting power from a direct current (DC) power supply to radio frequency (RF) power, via the amplifier;
creating a first impedance at an output of the amplifier, the first impedance resonating with the output capacitance at a first harmonic frequency and compensating for the output capacitance to produce a high impedance at the first harmonic frequency; and
creating a second impedance at the output of the amplifier, the second impedance resonating with the output capacitance of the amplifier at a second harmonic frequency and compensating for the output capacitance to produce a high impedance at the second harmonic frequency.
-
-
22. A class-F amplifier, comprising:
-
an input receiving a sinusoidal drive signal;
at least one active output device receiving the sinusoidal drive signal, the at least one active output device being forward-biased with a predetermined current; and
a harmonic network coupled to the at least one active output device, the harmonic network terminating odd harmonic frequencies to generate a substantially square wave output voltage signal waveform and sinusoidal output current waveform. - View Dependent Claims (23)
-
-
24. A mobile terminal, comprising:
-
an amplifier that converts power from a direct current (DC) power supply to radio frequency power (RF), the amplifier having an output capacitance;
a circuit coupled to the amplifier, the circuit comprising a plurality of sections, each section comprising at least one element that generates an impedance that resonates with the output capacitance at one of a number of respective odd harmonic frequencies and creates a high impedance to the amplifier at the respective odd harmonic frequency; and
a transmit device coupled to the circuit, the transmit device receiving the RF power.
-
Specification