Dual-frequency high-efficiency power amplifier based on dual composite left and right hand units

Abstract

The dual-frequency high-efficiency power amplifier comprises an output harmonic control circuit, an output fundamental wave matching circuit, an input harmonic control circuit, an input fundamental wave matching circuit, a transistor, an input blocking capacitor, an output blocking capacitor and a metal ground on the lower surface, wherein the output harmonic control circuit, the output fundamental wave matching circuit, the input harmonic control circuit, the input fundamental wave matching circuit, the transistor, the input blocking capacitor and the output blocking capacitor are arranged on the upper surface of a dielectric substrate. According to an equivalent circuit of a dual composite right / left hand structure, series LC resonance and parallel LC resonance are respectively formed at double frequency multiplication positions of two working frequencies, so that a matching structure generates a transmission zero point at the double frequency multiplication positions of the two working frequencies, and double-frequency second harmonic tuning is realized; by means of the second harmonic zero point, the harmonic matching circuit and the fundamental wave matching circuit can be isolated from each other, so that the double-frequency harmonic matching circuit and the double-frequency fundamental wave matching circuit can be independently designed, four frequencies (two fundamental frequencies and two second harmonic frequencies) do not need to be considered at the same time, the design complexity of the double-frequency matching circuit is simplified, and the design efficiency is improved. The double-frequency power amplifier is simple in structure and high in efficiency.

Description

technical field [0001] The invention relates to a dual-frequency high-efficiency power amplifier based on a dual composite left and right hand unit, which belongs to the field of radio frequency and microwave circuits and wireless communication. Background technique [0002] In recent years, with the rapid development of modern communication technology, more and more communication standards distributed in different frequency bands have been continuously proposed, which requires the communication system to realize high-performance multi-frequency working mode in a miniaturized and low-cost manner. Each module also puts forward higher requirements. As an important part of the RF front-end, the power amplifier consumes most of the energy of the system. It has a major impact on the performance of the entire system. Various types of power amplifiers are also developing in the direction of multi-performance, low cost, and integration. Dual-frequency power amplifiers can effective...

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Problems solved by technology

[0003] Among various power amplifiers, harmonic control power amplifiers are widely used in microwave systems due to their advantages of easy circuit implementation, high work efficiency, and high operating frequency. There are requirements for both harmonic impedance and harmonic impedance. The matching network must match multiple impedances at the same time when working at a single frequency, and the number of impedances must be doubled when working at a dual frequency. Conventional methods are difficult to achieve

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