High-linearity Doherty power amplifier implemented by double-negative ferroelectric material

A technology of power amplifiers and negative ferroelectric materials, applied in power amplifiers, amplifiers with semiconductor devices/discharge tubes, amplifiers, etc., can solve problems such as phase distortion that cannot be solved, and achieve strong practicability, application prospects, and high linearity degree, the effect of improving efficiency
CN105871341AActive Publication Date: 2016-08-17重庆嘉旦微电子有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
重庆嘉旦微电子有限公司
Publication Date
2016-08-17

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Abstract

The invention discloses a high-linearity Doherty power amplifier implemented by a double-negative ferroelectric material. The high-linearity Doherty power amplifier comprises a main power amplifier module and an auxiliary power amplifier module which are connected in parallel, wherein an input end of the main power amplifier module corresponds to an input end of the Doherty power amplifier; an output end of the auxiliary power amplifier module corresponds to an output end of the Doherty power amplifier; a phase-shifting module is connected in series between an input end of the auxiliary power amplifier module and a main input end of the Doherty power amplifier; a double-negative ferroelectric structure for compensating for AM-PM distortion of the auxiliary power amplifier module under a high power condition is connected in series between an output end of the main power amplifier module and a main output end of the Doherty power amplifier; and an adjustable direct-current bias is introduced into the double-negative ferroelectric structure. Through adoption of the high-linearity Doherty power amplifier, an electromagnetic bandgap property and a slow-wave effect of the double-negative ferroelectric material structure are utilized, so that a required phase can be obtained by adjustment of the double-negative ferroelectric structure.
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Description

technical field

[0001] The invention relates to the field of microwave circuits, in particular to a high-linearity Doherty power amplifier utilizing a double-negative ferroelectric material structure. Background technique

[0002] With the development and continuous progress of wireless communication, the entire wireless system has higher and higher requirements on the peak-to-average ratio, so the linearity of the power amplifier is becoming more and more important. In order to obtain higher linearity, power amplifier back-off and feed-forward And pre-distortion methods, these methods will lead to lower efficiency and complex structure of the power amplifier. In the Doherty (Doherty) power amplifier scheme, it is difficult to obtain high efficiency and good linearity at the same time.

[0003] At present, in order to improve the efficiency and linearity of Doherty power amplifier, N-way and unbalanced Doherty power amplifier schemes are also studied, but this method is als...

Claims

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