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Broadband Doherty power amplifier

A power amplifier and amplifier technology, applied in power amplifiers, amplifiers, improving amplifiers to expand bandwidth, etc., can solve the problem of inability to take into account the bandwidth and efficiency of power amplifiers, achieve great practical value, high fallback efficiency, and solve bandwidth and efficiency. the contradictory effect of

Active Publication Date: 2018-02-13
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a wideband Doherty power amplifier, which aims to solve the problem that the existing wideband Doherty power amplifier can only have a high back-off efficiency at a single frequency point, which leads to the inability to balance Technical Issues of Power Amplifier Bandwidth and Efficiency

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  • Broadband Doherty power amplifier
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Embodiment Construction

[0030] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] The present invention provides a wideband Doherty power amplifier structure with high fallback efficiency based on compensation network, the purpose of which is to improve the fallback efficiency and expand the bandwidth, thereby solving the problem that the bandwidth limitation of the Doherty power amplifier cannot be adapted to many contemporary mobile communication systems. This is a techn...

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Abstract

The invention discloses a broadband Doherty power amplifier, comprising a power divider, a main power amplification network, an auxiliary power amplification network and a broadband compensation network. The broadband compensation network is the compensation network which is composed of a capacitor, an inductor, a resistor and a microstrip and has a special structure. According to the broadband compensation network, a phase compensation effect can be achieved in a relatively wide band, a signal can be amplified efficiently in a relatively wide frequency range, the relatively high backoff efficiency is achieved in the band, and in particular, the ultrahigh efficiency is achieved at a 6dB power backoff position. Through adjustment of parameters of the compensation network, the broadband Doherty power amplifier can be generalized to the Doherty power amplifiers of other bands, and the broadband Doherty power amplifier has wide application prospect and practical value.

Description

technical field [0001] The invention belongs to the field of power amplifiers, and more particularly, relates to a broadband Doherty power amplifier. Background technique [0002] With the rapid advancement of 4G / 5G mobile communication systems, improving the system data transmission rate and channel capacity has become the primary goal of communication system development. As one of the very important circuit components in the wireless transceiver system, the power amplifier produces intermodulation products and nonlinear distortion, which will increase correspondingly with the improvement of its own output power and efficiency. In communication systems, power backoff is often used to reduce nonlinear distortion of signals and ensure that the transmitted signals in the system are not compressed. However, power backoff will greatly reduce the efficiency of power amplifiers and lead to system performance deterioration. Therefore, the research of high-efficiency power amplifie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/02H03F1/42H03F3/20
CPCH03F1/0288H03F1/42H03F3/20
Inventor 毕晓君谢雨沁
Owner HUAZHONG UNIV OF SCI & TECH
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