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A Broadband Doherty Power Amplifier

A technology for power amplifiers and amplifiers, which is applied in the direction of power amplifiers, amplifiers, and improved amplifiers to expand bandwidth. It can solve the problems of power amplifier bandwidth and efficiency, and achieve great practical value, wide application, and high fallback efficiency.

Active Publication Date: 2019-11-12
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • A Broadband Doherty Power Amplifier
  • A Broadband Doherty Power Amplifier
  • A Broadband Doherty Power Amplifier

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, 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 constitute a conflict with each other.

[0031] The present invention provides a broadband Doherty power amplifier structure with high back-off efficiency based on a compensation network. The technical problems of the coexistence of multiple communication standards and the division of multiple communication frequency bands.

[0032] Such as figure 2 As shown, it is a schematic structural diagram of the broadband Doherty power amplif...

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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 specifically 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 that will increase correspondingly with the improvement of its own output power and efficiency. In communication systems, power backoff is often used to reduce signal nonlinear distortion and ensure that the transmission signal in the system is not compressed, but power backoff will greatly reduce the efficiency of the power amplifier, resulting in deterioration of system performance. Therefore, the research of high-efficiency power amplifiers is...

Claims

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Application Information

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Patent Type & Authority Patents(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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