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A high back-off efficiency power amplifier based on a distributed input and output structure

A power amplifier, input and output technology, applied in the field of high back-off efficiency power amplifiers, can solve the problem of the difficulty of broadbanding the board-level Doherty power amplifier, achieve the performance of broadband high back-off efficiency, realize input impedance matching, solve Effects of bandwidth throttling issues

Inactive Publication Date: 2019-05-31
TSINGHUA UNIV
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Problems solved by technology

However, due to the limitation of chip size and passive network loss, the board-level Doherty power amplifier broadband method is difficult to apply in the design of MMIC power amplifiers. The current reported MMIC Doherty power amplifiers are usually less than 30%

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  • A high back-off efficiency power amplifier based on a distributed input and output structure
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  • A high back-off efficiency power amplifier based on a distributed input and output structure

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0029] Aiming at the bandwidth limitation problem of the Doherty power amplifier, the present invention proposes a high backoff efficiency power amplifier (Distributed Input and Output Efficient Power Amplifier, DEPA) based on a distributed input and output structure, which helps to realize wideband high backoff in the integrated circuit process efficient performance.

[0030] The DEPA of the present invention includes a main power amplifier (Main PA) and an auxiliary power amplifier (Auxiliary PA), the output terminals of the main power amplifier and the auxiliary power amplifier adopt a distributed power synthesis network, and the input terminals of the auxiliary power amplifier adopt a distributed matching network, ther...

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Abstract

The invention provides a high-backspacing-efficiency power amplifier based on a distributed input and output structure. The high-backspacing-efficiency power amplifier comprises a main power amplifier, an auxiliary power amplifier, a distributed power synthesis network located at the output end of the main power amplifier and the output end of the auxiliary power amplifier and a distributed matching network located at the input end of the auxiliary power amplifier. According to the high-backspacing-efficiency power amplifier based on the distributed input and output structure, the problem of bandwidth limitation of a Doherty power amplifier is solved, and the broadband high-backspacing-efficiency performance can be achieved on the integrated circuit technology.

Description

technical field [0001] The invention belongs to the technical field of microwave power amplifiers and integrated circuits, and in particular relates to a power amplifier with high back-off efficiency based on a distributed input-output structure. Background technique [0002] The power amplifier (PA) is the main energy-consuming unit in the transceiver, and improving the efficiency of the power amplifier is crucial to reducing the power consumption of the entire communication system. In order to improve spectrum utilization, modern communication signals often use complex modulation methods such as OFDM and CDMA, which brings about the problem of peak-to-average ratio (PAPR). Such a high PAPR brings difficulties to the design of the radio frequency power amplifier, and especially has an adverse effect on the efficiency index of the power amplifier. The traditional class AB power amplifier has high efficiency near the saturation power, but when the output power decreases, its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/42H03F1/56H03F1/02H03F3/19H03F3/21H03F3/68
Inventor 吕关胜陈文华
Owner TSINGHUA UNIV
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