Predistortion linearization device of millimeter wave power amplifier

A linearizer and pre-distortion technology, applied in aerospace measurement and control, and satellite communication fields, can solve problems such as general adjustability, gain and phase cannot be adjusted separately, and achieve the effect of convenient control

Active Publication Date: 2013-11-27
10TH RES INST OF CETC
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  • Abstract
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Problems solved by technology

The existing linearization technology is difficult to realize in the millimeter wave frequency band, and the adjustability is average, and the gain and phase cannot be adjusted independently

Method used

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  • Predistortion linearization device of millimeter wave power amplifier

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with accompanying drawing.

[0016] exist figure 1Among them, the millimeter-wave power amplifier predistortion linearizer mainly includes: quadrature coupler 5, power combiner 8, I circuit 6 nonlinear circuits, Q circuit 7 amplitude adjustable circuits. Wherein the I circuit 6 is a diode 16 non-linear circuit, which mainly produces distortion components, and the Q circuit 7 is an electronically adjustable attenuator 18, which mainly controls the amplitude of the Q circuit 7 signal. The direct end 2 of the quadrature coupler connected to the input end of the I-way 6 and the coupling end 3 of the quadrature coupler connected to the input end of the Q-way 7 have a phase difference of 90 degrees. The isolation terminal 4 of the quadrature coupler is connected to the matched load. First, the radio frequency signal enters from the input port 1 of the quadrature coupler, and is divided into two orthogonal ...

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Abstract

The invention discloses a predistortion linearization device of a millimeter wave power amplifier and aims at providing the predistortion linearization device which is simple in structure, wide in bandwidth, good in stability and suitable for the millimeter wave high-power amplifier, wherein gain and phase are respectively adjustable. According to the technical scheme, a radio frequency signal is input to the input end of an orthocoupler through a radio frequency input port (1), and two paths of orthogonal signals are produced. The signal of one path enters a path I (6) through the straight end (2) of the orthocoupler, bias voltage is adjusted through a DC feed power supply (12), a component with the phase of non-linear conditions not distorted and amplitude distorted is obtained through a high-resistance wire (17) connected with a diode (16), and a signal with the characteristic of gain expansion is output. The signal of the other path enters a path Q (7) by being connected with the isolation end (4) of the orthocoupler and the coupling end of the orthocoupler of a matched load, and a signal with controllable amplitude is output. The two signals finally pass through a power synthesizer (8), then a signal with amplitude and phase both distorted is output, and the amplitude and the phase are respectively adjustable.

Description

technical field [0001] The invention relates to a linearizer used in a millimeter-wave high-power amplifier, which is mainly used in aerospace measurement and control, satellite communication and other fields. Background technique [0002] Predistortion linearization technology is the simplest RF power amplifier linearization technology in theory, but with the rapid development of wireless communication technology, the communication frequency band is becoming more and more crowded, and improving spectrum utilization has become a hot research topic. Millimeter wave technology is a high-tech, and its spectrum resource development value is great. As a key component of the millimeter wave transmission system and one of the most expensive devices in the base station, the power amplifier has higher and higher requirements for efficiency, and its output linearity The requirements are getting higher and higher, and the main requirements are concentrated on high-linearity and high-ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/32H03F3/20
Inventor 张能波
Owner 10TH RES INST OF CETC
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