Bandwidth-adjustable class F power amplifier

Abstract

The invention discloses a bandwidth-adjustable class F power amplifier that comprises a transistor, a harmonic control circuit, a parasitic compensation circuit, a bandwidth-adjustable fundamental wave matching network and a load; the harmonic control circuit comprises an input voltage, a short-circuit transmission line and an open-circuit transmission line, the short-circuit transmission line isconnected with the open-circuit transmission line in parallel to form an even harmonic short-circuited circuit, and the input voltage is connected with the even harmonic short-circuited circuit in series; a short-circuit transmission line and an open-circuit transmission line are connected in parallel in a harmonic control circuit to form an even-order harmonic short-circuited circuit, so the harmonic control circuit can only act on even harmonics; fundamental waves and odd harmonics are open-circuited, so that the circuit is not influenced, and the power amplifier efficiency is improved; in addition, the parasitic compensation circuit is connected in series between the harmonic control circuit and the bandwidth-adjustable fundamental wave matching network, so that the influence of Cout onthe third harmonic impedance can be compensated, a good third harmonic open-circuit state is realized, and the high-efficiency characteristic of the class F power amplifier is ensured.

Description

technical field [0001] The invention relates to the technical field of wireless communication power amplifiers, in particular to a class F power amplifier with adjustable bandwidth. Background technique [0002] As an important front-end device in the wireless communication system, the power amplifier uses the DC energy provided by the power supply to amplify the modulated frequency band signal to the required power value and sends it to the antenna for transmission, ensuring that the receiver in a certain area can receive Satisfactory signal level, the quality of its design directly affects the entire circuit system. [0003] Class F power amplifiers have received a lot of attention because their ideal operating efficiency can reach 100%. In the existing technical solutions, the output matching network of Class F can be realized in the form of either LC lumped components or Transmission lines can be used, or a mixture of the two. For the current Sub-6GHz frequency band use...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention proposes a bandwidth-adjustable Class F power amplifier, which can solve the existing defects of the existing Class F power amplifiers, such as the open circuit state affecting odd harmonics, and the fundamental wave impedance will shift.

Images