POWER AMPLIFIER WITH ADVANCED LINEARITY

• US 20120262234A1
• Filed: 02/29/2012
• Published: 10/18/2012
• Est. Priority Date: 04/12/2011
• Status: Active Grant

• Current Assignee: soongsil university-industry cooperation foundation
• Original Assignee: Electronics and Telecommunications Research Institute, Foundation of Soongsil University-Industry Cooperation
• Inventors: LEE, Chong Min, SEO, Chul Hun
• Granted Patent: US 8,872,583 B2
• Time in Patent Office: Days
• US Class Current: 330/149
• CPC Class Codes: H03F 1/3241 using predistortion circuits H03F1/3211, H03F1/3217 take precedence
• CPC Class Codes: H03F 1/565 using inductive elements
• CPC Class Codes: H03F 2200/318 A matching circuit being used as coupling element between two amplifying stages
• CPC Class Codes: H03F 3/602 Combinations of several amplifiers

Abstract

An amplifier is provided. The amplifier includes an input matching unit suppressing harmonic components of an input signal; a high power amplification unit amplifying a signal suppressed by the input matching unit; and an output matching unit suppressing harmonic components of an output signal amplified by the high power amplification unit.

Claims

1. An amplifier, comprising:

an input matching unit suppressing harmonic components of an input signal;

a high power amplification unit amplifying a signal suppressed by the input matching unit; and

an output matching unit suppressing harmonic components of an output signal amplified by the high power amplification unit.

2. The amplifier of claim 1, wherein the input matching unit and the output matching unit have frequency characteristics of a notch filter.

3. The amplifier of claim 2, wherein the input matching unit and the output matching unit have a meta electromagnetic wave structure.

4. The amplifier of claim 3, wherein the input matching unit and the output matching unit have a composite right/left handed (CRLH) structure.

5. The amplifier of claim 3, wherein the input matching unit and the output matching unit have a two-stage CRLH structure.

6. An amplifier, comprising:

a predistortion unit suppressing intermodulation distortion; and

a power amplification unit amplifying power of an amplification target signal passing through the predistortion unit,

wherein the power amplification unit has a parallel amplifier structure in which a first amplification unit and a second amplification unit are coupled with each other in parallel,

the first amplification unit and the second amplification unit each include;

an input matching unit suppressing harmonic components of the amplification target signal;

a high power amplification unit amplifying a signal suppressed by the input matching unit; and

an output matching unit suppressing the harmonic components of an output signal amplified by the high power amplification unit.

7. The amplifier of claim 6, wherein the predistortion unit includes a phase shifter that shifts a phase of third intermodulation distortion component of a signal input to the predistortion unit by 180°

.

8. The amplifier of claim 6, wherein the input matching unit and the output matching unit have frequency characteristics of a notch filter.

9. The amplifier of claim 8, wherein the input matching unit and the output matching unit have a meta electromagnetic wave structure.

10. The amplifier of claim 9, wherein the input matching unit and the output matching unit have a composite right/left handed (CRLH) structure.

11. The amplifier of claim 9, wherein the input matching unit and the output matching unit have a two-stage CRLH structure.