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A Broadband Doherty Power Amplifier Based on Single Parallel Resonant Block

A technology for power amplifiers and resonant blocks, which is applied in the direction of improving amplifiers to improve efficiency, etc., and can solve the problems of multi-chip layout area, occupation, and large loss

Active Publication Date: 2021-09-10
NANJING MILEWEI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these two methods have the same limitation, that is, each transistor requires a resonant network to control harmonics, which will undoubtedly introduce greater losses and occupy more chip layout area

Method used

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  • A Broadband Doherty Power Amplifier Based on Single Parallel Resonant Block
  • A Broadband Doherty Power Amplifier Based on Single Parallel Resonant Block
  • A Broadband Doherty Power Amplifier Based on Single Parallel Resonant Block

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Embodiment Construction

[0049] The present invention will be described in further detail below in conjunction with the examples and accompanying drawings, and the following examples do not limit the present invention.

[0050] A kind of broadband Doherty power amplifier based on single parallel resonant block provided by this embodiment, such as figure 1 shown, which includes:

[0051] A broadband input power splitter, the input end of the broadband input power splitter is connected to the radio frequency signal input end;

[0052] Carrier amplifying circuit, the input end of carrier amplifying circuit is connected with the first output end of described broadband input power divider; Described carrier amplifying circuit is mainly composed of phase-shifting network, the first input matching network, carrier amplifier T1, the first output matching The network is cascaded in sequence;

[0053] A peak amplifying circuit, the input end of the peak amplifying circuit is connected with the second output e...

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PUM

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Abstract

The invention discloses a broadband Doherty power amplifier based on a single parallel resonant block, which includes: a broadband input power splitter; The network is cascaded in sequence; the peak amplifier circuit is mainly composed of the second input matching network, the peak amplifier T2, and the second output matching network; the combined resonant circuit, the combined resonant circuit includes a parallel resonant block, mainly It is formed by connecting the transmission line inductance L1 and the lumped capacitance C1 in parallel; the constraint condition M for selecting the inductance of the transmission line inductance L1 is: when the two ends of the parallel resonant block are connected to the Ropt end load, the amplitude of S11 of the parallel resonant block is not Greater than ‑15dB, and the absolute value of the S21 phase is not greater than 10°. The invention has low insertion loss, compact structure and smaller overall volume, which is beneficial to miniaturized design and saves cost.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a power amplifier. Background technique [0002] With the development of wireless communication technology, the peak-to-average ratio of the modulated signal becomes higher and higher. It is very necessary to improve the efficiency of the power amplifier at a larger backoff output power. At the same time, the large-scale application of MIMO technology in 5G reduces the demand for single power amplifier output power and increases the demand for miniaturized power amplifier size. GaN-based high electron mobility monolithic integrated Doherty power amplifier is one of the best choices to meet the above requirements, and thus has attracted widespread attention. [0003] In order to further improve the efficiency of the amplifier, it is usually necessary to control the harmonics of the transistor. A common approach is to use a resonant network between the carrier or pea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/07
CPCH03F1/07
Inventor 刘睿佳夏冬
Owner NANJING MILEWEI CORP
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