Novel power amplification circuit

Abstract

The utility model discloses a novel power amplification circuit, which comprises an impedance transformer, a power amplifier tube and a peripheral circuit, the impedance transformer comprises T1 and T2, the T1 and T2 are both connected with the power amplifier tube, and the peripheral circuit is connected with the T1 and T2. According to the utility model, the coaxial Balun impedance transformer made of coaxial cables is used, so that the working bandwidth of the coaxial Balun impedance transformer is about two times of that of a traditional power amplification circuit. The power capacity of the power amplification circuit depends on the power capacity of the power amplifier tube and the coaxial Balun impedance transformer, and the power amplification circuit is easy to process and manufacture, so that the power amplification circuit is suitable for broadband power amplification.

Description

Technical Field

[0001] The utility model relates to the field of power amplifier circuits, in particular to a novel power amplifier circuit. Background Art

[0002] The power amplifier circuit is the core of the wireless communication transmission system. It usually uses a power amplifier tube to adopt a multi-stage amplifier circuit to amplify the low-power RF signal step by step, and then transmits the amplified RF signal to the antenna for radiation. However, when the power amplifier circuit is working, it is easy to generate parasitic capacitance, which affects its linearity and distortion, and reduces the efficiency of the power amplifier.

[0003] In view of the above situation, the utility model provides a new power amplifier circuit with high stability and high linearity. Utility Model Content

[0004] The utility model provides a novel power amplifier circuit with high stability and high linearity.

[0005] The utility model aims to provide a novel power amplifier circuit, comprising an impedance converter, a power amplifier tube and a peripheral circuit, wherein the impedance converter comprises T1 and T2, both T1 and T2 are connected to the power amplifier tube, and the peripheral circuit is connected to T1 and T2.

[0006] Furthermore, T1 includes three sections of HCAAY-50-12 coaxial cables, and T2 includes two sections of HCAAY-50-12 coaxial cables.

[0007] Furthermore, the peripheral circuit includes capacitors, resistors, adjustable capacitors, inductors, BNC sockets and bias power supply voltages.

[0008] The utility model has the following advantages: the utility model uses a coaxial Balun impedance transformer made of coaxial cable to make the working bandwidth about twice that of the traditional power amplifier circuit. The power capacity of the power amplifier circuit depends on the power capacity of the power amplifier tube and the coaxial Balun impedance transformer, which is easy to process and manufacture, so this power amplifier circuit is suitable for broadband power amplification. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is the circuit diagram of the T1 impedance converter of the utility model;

[0010] Figure 2 This is the circuit diagram of the T2 impedance converter of the utility model;

[0011] Figure 3 This is the circuit diagram of the power amplifier tube of the utility model;

[0012] Figure 4 This is the peripheral circuit diagram of the first part of the utility model;

[0013] Figure 5 This is the peripheral circuit diagram of the second part of the utility model. DETAILED DESCRIPTION

[0014] The utility model provides a novel power amplifier circuit, comprising an impedance converter, a power amplifier tube and a peripheral circuit. The impedance converter comprises T1 and T2, both T1 and T2 are connected to the power amplifier tube, and the peripheral circuit is connected to T1 and T2.

[0015] In this embodiment, T1 includes three sections of HCAAY-50-12 coaxial cables, and T2 includes two sections of HCAAY-50-12 coaxial cables.

[0016] In this embodiment, the peripheral circuit includes a capacitor, a resistor, an adjustable capacitor, an inductor, a BNC socket and a bias power supply voltage.

[0017] In this embodiment, the power amplifier tube adopts MGF141G.

[0018] In this embodiment, the coaxial cable used by T1 is 62-90 mm, and is connected to each other by φ1.5 silver-plated twisted wires to form a 9:1 Balun impedance transformer. The coaxial cable used by T2 is 70-90 mm, and is connected to each other by φ1.5 silver-plated twisted wires to form a 1:4 Balun impedance transformer.

[0019] In this embodiment, the coaxial Balun impedance converter made of coaxial cable has an operating bandwidth of about 2 times that of the conventional power amplifier circuit, an operating frequency of about DC to 175MHz, a carrying power of 300W, and an input / output typical impedance of 50Ω. The power capacity of the power amplifier circuit depends on the power capacity of the power amplifier tube and the coaxial Balun impedance converter, which is easy to process and manufacture, so this power amplifier circuit is suitable for broadband power amplification.

[0020] In this embodiment, the power amplifier circuit can greatly broaden the working frequency band of the radio station, which is of great significance for improving the stability of the radio station's transmission power and ensuring the reliability of the radio station's operation.

[0021] Although the specific implementation of the utility model is described in detail in conjunction with the drawings, it should not be understood as limiting the scope of protection of this patent. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of this patent.

Claims

1. A new type of power amplifier circuit, including an impedance converter, a power amplifier tube and a peripheral circuit, characterized in that: The impedance converter includes T1 and T2, both of which are connected to the power amplifier tube, the peripheral circuit is connected to T1 and T2, T1 includes three sections of HCAAY-50-12 coaxial cable, and T2 includes two sections of HCAAY-50-12 coaxial cable.

2. A novel power amplifier circuit as claimed in claim 1, characterized in that: The peripheral circuit includes capacitors, resistors, adjustable capacitors, inductors, BNC sockets and bias power supply voltage.

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