A kind of harmonic control network and design method of class f power amplifier using it

Abstract

The invention discloses a harmonic control network and a design method of a class F power amplifier using the same. Traditional Class F power amplifiers have a narrow operating bandwidth. A harmonic control network of the present invention includes a first microstrip line, a second microstrip line, a third microstrip line, a fourth microstrip line, a fifth microstrip line and a sixth microstrip line. One end of the first microstrip line is connected to the output end of the transistor, and the other end is connected to one end of the second microstrip line. The other end of the second microstrip line is connected to one end of the third microstrip line and the fifth microstrip line. The other end of the fifth microstrip line is suspended. The other end of the third microstrip line is connected to one end of the fourth microstrip line; the other end of the fourth microstrip line is connected to one end of the sixth microstrip line. The other end of the sixth microstrip line is suspended. The present invention expands the bandwidth of the class F power amplifier while maintaining high efficiency by increasing the tapered tuning microstrip line.

Description

technical field [0001] The invention belongs to the technical field of power amplifiers, and in particular relates to a harmonic control network and a design method of a class F power amplifier using the same. Background technique [0002] For more than half a century, radio frequency microwave technology has been developed rapidly and has been widely used in communication fields such as mobile phones, satellite communications, and WLAN. The radio frequency power amplifier module is an important part of the wireless communication system. In order to meet the long-distance transmission of the signal and ensure the reliable reception of the signal, the power amplifier module must be used in the wireless transceiver system to amplify the signal. Therefore, the performance of the power amplifier module directly determines the working conditions of the entire transceiver system. There is no doubt that the power amplifier module is the core part of the RF front end. [0003] Wit...

AI Technical Summary

Problems solved by technology

However, the class F power amplifiers in the prior art have the following problems: because the traditional class F power amplifiers use microstrip lines for harmonic control, and the high Q characteristic of microstrip lines often greatly limits the operating bandwidth of power amplifiers

However, there is a problem with the single microstrip tuning line: within the design bandwidth, when the frequency is close to the highest frequency point and the lowest frequency point, there is a problem of obvious drop in efficiency, which leads to the problem of low flatness in the band

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