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Outphasing power amplifier, method and device thereof for realizing output matching, and power amplification branch

A power amplifier and output matching technology, applied in the field of power amplifiers, can solve the problems of increasing the difficulty of linear indicators, high fallback efficiency, and increasing linearity

Active Publication Date: 2018-07-27
ZTE CORP
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Problems solved by technology

The improvement of PAR not only increases the difficulty of linear indicators, but also makes it difficult to achieve high-efficiency goals
This poses a great challenge to the current power amplifier design, that is to say, the power amplifier is required to achieve high back-off efficiency while overcoming the increase in linearity

Method used

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  • Outphasing power amplifier, method and device thereof for realizing output matching, and power amplification branch
  • Outphasing power amplifier, method and device thereof for realizing output matching, and power amplification branch
  • Outphasing power amplifier, method and device thereof for realizing output matching, and power amplification branch

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Embodiment Construction

[0036] In order to make the purpose, technical solution and advantages of the application clearer, the embodiments of the application will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0037] New high-efficiency transmitter structures include outphasing technology, envelope elimination and restoration (EER, Envelope Elimination and Restoration) technology, envelope tracking (ET, Envelope Tracking) technology, load modulation (load modulation) and pulse width Modulation (PWM, Pulse Width Modulation) technology, etc. Among them, outphasing technology can make high-efficiency switching power amplifiers be applied without affecting the linearity of the transmitter through the separation of signals. Therefore, outphasing technology has become a high-efficiency power amplifier a...

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Abstract

The invention discloses an outphasing power amplifier and a method thereof for realizing output matching. The method comprises the following steps: calculating a compensatory angle of a combiner according to a signal power back-off quantity of a signal source; determining a ratio of optimal impedance Zm1 corresponding to a peak output power value of a power tube to optimal impedance Zm2 corresponding to a mean output power value of the power tube according to the compensatory angle obtained by calculation, wherein the ratio is a standing-wave ratio; determining impedance Zopt of a maximum power point of the power tube by a load pulling mode according to the size of an isostatic standing-wave ratio circle; by taking the impedance Zopt of the maximum power point as a reference point, findingout impedance Zbk_eff of a back-off high-efficiency point on the isostatic standing-wave ratio circle; and respectively matching the impedance Zopt of the maximum power point and the impedance Zbk_eff of the back-off high-efficiency point, which are used as corresponding impedance values, to two input ends of the combiner. The method disclosed by the invention ensures that the output power of theoutphasing power amplifier is the maximum and realizes high-efficiency work of the power amplifier; and furthermore, the design complexity is reduced.

Description

technical field [0001] The present application relates to but not limited to power amplifier technology, especially to an outphasing (outphasing) power amplifier, a method and device for realizing output matching, and a power amplifier branch. Background technique [0002] At present, with the increasingly fierce competition in the wireless communication market, the performance of base station products has become the main focus of competition in the industry. As an important part of the base station, the power amplifier (referred to as the power amplifier) ​​is directly related to the quality of the base station's transmitted signal and the communication effect. In order to achieve higher rate data transmission within a limited bandwidth, complex digital modulation techniques are used in modern wireless communication systems. These complex modulation techniques coupled with multi-carrier configurations result in an increase in signal peak-to-average ratio (PAR). The improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/32H03F1/02H03F3/20
CPCH03F1/02H03F1/32H03F3/20H03F1/18H03F3/189H03F2200/387H03F2200/423H03F2200/451H03F2201/3215
Inventor 余敏德秦天银彭瑞敏张晓毅
Owner ZTE CORP
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