阅读说明：本技术 放大器 (Amplifier with a high-frequency amplifier ) 是由 桑田英悟 西原淳 于 2018-03-14 设计创作，主要内容包括：放大器构成为,第1电容器(10)在从放大元件(3)输出的信号所包含的二次谐波的频率下谐振,包括第2传输线路(6)、第1电容器(10)及第2电容器(11)的电路在从放大元件(3)输出的信号所包含的三次谐波的频率下谐振,并且与阻抗匹配电路(14)一起对基波的阻抗进行匹配。(The amplifier is configured such that the 1 st capacitor (10) resonates at a frequency of a second harmonic contained in a signal output from the amplification element (3), a circuit including the 2 nd transmission line (6), the 1 st capacitor (10), and the 2 nd capacitor (11) resonates at a frequency of a third harmonic contained in the signal output from the amplification element (3), and impedance matching of the fundamental wave is performed together with the impedance matching circuit (14).)

1. An amplifier, characterized in that it comprises a first amplifier,

the amplifier is provided with:

an amplifying element that amplifies an input signal and outputs the amplified signal;

a 1 st transmission line having one end connected to an output terminal of the signal in the amplification element;

a 2 nd transmission line having one end connected to the other end of the 1 st transmission line;

a 1 st capacitor having one end connected to the other end of the 1 st transmission line and the other end grounded;

a 2 nd capacitor having one end connected to the other end of the 1 st transmission line and the other end connected to the other end of the 2 nd transmission line; and

an impedance matching circuit having one end connected to the other end of the 2 nd transmission line, the impedance matching circuit matching an impedance of a fundamental wave included in a signal output from the amplification element,

the 1 st capacitor resonates at a frequency of a second harmonic contained in a signal output from the amplifying element,

a circuit including the 2 nd transmission line, the 1 st capacitor, and the 2 nd capacitor resonates at a frequency of a third harmonic included in a signal output from the amplification element, and matches an impedance of the fundamental wave together with the impedance matching circuit.

2. The amplifier of claim 1,

the 2 nd transmission line includes:

a 3 rd transmission line having one end connected to the other end of the 1 st transmission line;

a 4 th transmission line having one end connected to the other end of the 3 rd transmission line; and

and a 5 th transmission line having one end connected to the other end of the 4 th transmission line and the other end connected to the other end of the 2 nd capacitor.

3. The amplifier of claim 2,

the amplifier includes a 3 rd capacitor, one end of the 3 rd capacitor is connected to the 5 th transmission line, and the other end of the 3 rd capacitor is grounded.

4. The amplifier of claim 2,

the amplifier includes a 4 th capacitor, one end of the 4 th capacitor is connected to the other end of the 3 rd transmission line, and the other end of the 4 th capacitor is grounded.

5. The amplifier of claim 2,

the amplifier is provided with:

a 3 rd capacitor having one end connected to the 5 th transmission line and the other end grounded; and

and a 4 th capacitor having one end connected to the other end of the 3 rd transmission line and the other end grounded.

Technical Field

The present invention relates to an amplifier including an amplifying element for amplifying an input signal.

Background

Patent document 1 below discloses an amplifier including an amplification element that amplifies an input signal.

In the amplifier disclosed in patent document 1, the 1 st series resonant circuit and the 2 nd series resonant circuit are connected in parallel to the output terminal of the amplifying element, respectively.

The resonance frequency of the 1 st series resonant circuit is a frequency higher than the frequency of the second harmonic contained in the input signal.

The resonance frequency of the 2 nd series resonant circuit is a frequency lower than the frequency of the third harmonic contained in the input signal.

Disclosure of Invention

Problems to be solved by the invention

Since the conventional amplifier includes the 1 st series resonant circuit and the 2 nd series resonant circuit, impedance matching between the second harmonic and the third harmonic can be achieved. However, neither the 1 st series resonant circuit nor the 2 nd series resonant circuit matches the impedance of the fundamental wave included in the input signal.

Therefore, in the conventional amplifier, there is a problem that a pure loss in which the power of the fundamental wave is changed into heat may occur, and the efficiency may be lowered.

The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain an amplifier capable of preventing the generation of pure loss in which the power of a fundamental wave is changed into heat, thereby preventing a decrease in efficiency.

Means for solving the problems

The amplifier of the present invention comprises: an amplifying element that amplifies an input signal and outputs the amplified signal; a 1 st transmission line having one end connected to an output terminal of a signal in the amplifying element; a 2 nd transmission line having one end connected to the other end of the 1 st transmission line; a 1 st capacitor, one end of which is connected to the other end of the 1 st transmission line, and the other end of which is grounded; a 2 nd capacitor having one end connected to the other end of the 1 st transmission line and the other end connected to the other end of the 2 nd transmission line; and an impedance matching circuit having one end connected to the other end of the 2 nd transmission line, the impedance matching circuit matching an impedance of a fundamental wave included in the signal output from the amplifying element, the 1 st capacitor resonating at a frequency of a second harmonic included in the signal output from the amplifying element, the circuit including the 2 nd transmission line, the 1 st capacitor, and the 2 nd capacitor resonating at a frequency of a third harmonic included in the signal output from the amplifying element, and matching an impedance of the fundamental wave together with the impedance matching circuit.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, the amplifier is configured such that the 1 st capacitor resonates at a frequency of a second harmonic included in a signal output from the amplifying element, the circuit including the 2 nd transmission line, the 1 st capacitor, and the 2 nd capacitor resonates at a frequency of a third harmonic included in the signal output from the amplifying element, and impedance matching of a fundamental wave included in the signal output from the amplifying element is performed together with the impedance matching circuit. Therefore, the amplifier of the present invention can prevent the generation of pure loss in which the power of the fundamental wave changes into heat, thereby preventing the efficiency from decreasing.

Drawings

Fig. 1 is a configuration diagram showing an amplifier of embodiment 1.

Fig. 2 is an explanatory diagram showing impedance conversion of the amplifier of embodiment 1.

Fig. 3 is an equivalent circuit for the third harmonic in the amplifier shown in fig. 1.

Fig. 4 is an equivalent circuit for the second harmonic in the amplifier shown in fig. 1.

Fig. 5 is an equivalent circuit for the fundamental wave in the amplifier shown in fig. 1.

Fig. 6 is an equivalent circuit for the fundamental wave in the amplifier shown in fig. 1.

Fig. 7 is an explanatory diagram showing impedance conversion of the amplifier shown in fig. 6.

Fig. 8 is an explanatory diagram showing a simulation result of a pass loss from the output terminal 3b to the output terminal 15 of the signal in the amplifying element 3.

Fig. 9 is an explanatory diagram showing a simulation result of the reflection coefficient of the amplifier in the output terminal 15.

Fig. 10 is a configuration diagram showing an amplifier of embodiment 2.

Fig. 11 is an explanatory diagram showing impedance conversion of the amplifier of embodiment 2.

Fig. 12 is an equivalent circuit for the third harmonic in the amplifier shown in fig. 10.

Fig. 13 is an equivalent circuit for the fundamental wave in the amplifier shown in fig. 10.

Fig. 14 is an equivalent circuit for the fundamental wave in the amplifier shown in fig. 10.

Fig. 15 is a configuration diagram showing an amplifier of embodiment 3.

Fig. 16 is an explanatory diagram showing impedance conversion of the amplifier of embodiment 3.

Fig. 17 is an equivalent circuit for the third harmonic in the amplifier shown in fig. 15.

Fig. 18 is an equivalent circuit for the fundamental wave in the amplifier shown in fig. 15.

Fig. 19 is a configuration diagram showing another amplifier according to embodiment 3.

Fig. 20 is a block diagram showing an amplifier including 2 amplification elements 3 and 2 pre-matching circuits 4.

Fig. 21A and 21B are configuration diagrams each showing a specific example of the impedance matching circuit 14 in the amplifier shown in fig. 20.

Detailed Description

Hereinafter, in order to explain the present invention in more detail, specific embodiments thereof will be explained with reference to the accompanying drawings.