Self-adaptive linearization radio frequency bias circuit

A technology of radio frequency bias and bias circuit, which is applied to radio frequency amplifiers, improved amplifiers to reduce nonlinear distortion, electrical components, etc., can solve problems such as phase distortion, transconductance reduction, and gain reduction, and achieve small size and high performance. Linearity, efficiency-enhancing effect

Active Publication Date: 2019-08-06
SYNERGY INNOVATION INST OF GDUT HEYUAN
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Problems solved by technology

This will result in reduced transconduc

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  • Self-adaptive linearization radio frequency bias circuit
  • Self-adaptive linearization radio frequency bias circuit
  • Self-adaptive linearization radio frequency bias circuit

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Embodiment Construction

[0020] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Herein, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments as a schematic diagram of the present invention. to explain the present invention, but not as a limitation of the present invention.

[0021] like image 3 As shown, an adaptive linearization radio frequency bias circuit includes a linearization bias circuit 100 and a radio frequency amplifier unit circuit 200; wherein: the linearization bias circuit 100 communicates with the radio frequency amplifier through an adaptive linearity compensation circuit 300 The unit circuit 200 is connected; the adaptive linear compensation circuit 300 adjusts the bias voltage of the power amplifier unit according to the change of the input signal power; the linearization bias circuit 100 includes a heterojunction bipolar transistor HBT2, a...

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Abstract

The invention discloses a self-adaptive linearization radio frequency biasing circuit which comprises a linearization biasing circuit and a radio frequency amplifier unit circuit. The linearization biasing circuit is connected with the radio frequency amplifier unit circuit through a self-adaptive linear compensation circuit; the linearization biasing circuit comprises a heterojunction bipolar transistor HBT2, a heterojunction bipolar transistor HBT3, a heterojunction bipolar transistor HBT4, a resistor R3, a resistor R4, a resistor R5 and a capacitor C2. The collector electrode of the heterojunction bipolar transistor HBT4 is connected with the port of the linearized bias circuit; self-adaptive linear compensation is achieved through feedback of the heterojunction bipolar transistor HBT4of the self-adaptive linear compensation circuit, the heterojunction bipolar transistor HBT0 can select a bias state according to the magnitude of output power, and the linearity is improved while theefficiency is considered by the power amplifier; the gain compression and phase distortion characteristics of the HBT can be effectively improved; the MMIC power amplifier is simple in structure, small in size, low in cost and suitable for design of the MMIC power amplifier.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to an adaptive linearization radio frequency bias circuit. Background technique [0002] The rapid development of wireless communication technology, especially the development of green wireless communication, has put forward higher and higher requirements for the performance indicators of communication systems. As an important part in the communication system, the linearity of the power amplifier is particularly important in the system. Therefore, how to better improve the linearity of power amplifiers has always been a research hotspot in the field of power amplifiers. One way to improve linearity is to improve RF biasing techniques. [0003] Traditionally, the bias point and load line of the power amplifier are designed according to the optimal 1dB compression point (P1dB), and the power amplifier has the highest efficiency when the output power is maximum. Howeve...

Claims

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Application Information

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IPC IPC(8): H03F1/02H03F1/32H03F3/19H03F3/21H03G3/30H04B1/04
CPCH03F1/0205H03F1/32H03F3/19H03F3/21H03G3/3042H04B1/04H03G2201/40H03F2200/451H04B2001/0425H04B2001/0416Y02D30/70
Inventor 张志浩章国豪蓝焕青钟立平黄国宏唐浩
Owner SYNERGY INNOVATION INST OF GDUT HEYUAN
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