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Load modulation amplifier

A technology of load modulation and carrier amplifier, applied in amplifiers, high-frequency amplifiers, radio frequency amplifiers, etc., can solve the problems of 5G wireless network cost, complexity and output power linearity limitation

Pending Publication Date: 2019-08-06
QORVO US INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, challenges remain regarding maintaining desired output back-off efficiencies at mmWave frequencies for fifth generation (5G) wireless networks including 28GHz, 38GHz and 60GHz
Additionally, 5G wireless networks employing phased array applications are limited by cost, complexity, and output power linearity
Also, digital predistortion techniques are not a desirable solution for nonlinear Doherty operation at mmWave frequencies

Method used

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Embodiment Construction

[0023] The embodiments set forth below represent the information necessary to enable one skilled in the art to practice the embodiments and illustrate the best mode of practicing the embodiments. After reading the following description in light of the accompanying drawing figures, those skilled in the art will understand the concepts of the disclosure and will recognize applications of these concepts not specifically addressed herein. It should be understood that these concepts and applications are within the scope of this disclosure and the appended claims.

[0024] It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present dis...

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Abstract

A load modulation amplifier is disclosed. The load modulation amplifier includes a carrier amplifier for amplifying a radio frequency signal when input power of the radio frequency signal is below a predetermined power threshold value and a peak amplifier coupled in parallel with the carrier amplifier for amplifying the radio frequency signal when input power of the radio signal is above the predetermined power threshold value. The load modulation amplifier further includes an output quadrature coupler configured to combine power from both the carrier amplifier and the peak amplifier for output through an output load terminal. Output impedance of the peak amplifier monotonically increases with increasing output power at the output load terminal.

Description

[0001] Related applications [0002] This application is related to U.S. Patent No. 9,484,865, issued November 1, 2016, entitled "RECONFIGURABLE LOAD MODULATION AMPLIFIER"; U.S. Patent Application Serial No. 15 / 278,450, filed September 28, 2016, entitled "RECONFIGURABLE LOAD MODULATION AMPLIFIER"; and US Patent Application Serial No. 15 / 278,270, filed September 28, 2016, entitled "RECONFIGURABLE LOAD MODULATION AMPLIFIER," the disclosure of each of which is hereby incorporated by reference in its entirety. technical field [0003] The present disclosure relates to amplifiers, and in particular to a load modulating amplifier having a carrier amplifier and a peaking amplifier coupled in parallel. Background technique [0004] Conventional Doherty power amplifiers have been used to improve high power back-off efficiency over a wide power range. However, as the frequency increases, the performance of the Doherty PA degrades overall due to the amplifier device parasitic capacita...

Claims

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Application Information

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IPC IPC(8): H03F1/02H03F1/56H03F3/195H03F3/213
CPCH03F1/0288H03F1/56H03F3/195H03F3/213H03F2200/451H03F3/19H03F2200/516H03F2200/387H03F3/602H03F2200/204H03F1/32H03F3/21
Inventor 凯文·韦斯利·科巴亚希
Owner QORVO US INC
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