Analysis of Highly Efficient Broadband Push–Pull Class-E Power Amplifier

Heng Lu, Jianliang Jiang*, Hengli Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Switching-mode power amplifiers have provided unprecedented opportunities for modern wireless communication technology. However, its single-ended structure suffers from significant harmonic interferences on signal transmission; in some cases, higher return loss caused by the impedance mismatch may damage or even destroy the device directly. Here it shows, analytically and experimentally, a broadband push–pull parallel-circuit (PC) Class-E power amplifier (PA) which can present high efficiency and flatness gain over a wide frequency range. Based on the broadband capability of the proposed structure, a highly-efficient push–pull PC Class-E PA combining single reactance compensation technique and Chebyshev low-pass impedance matching network (MN) is designed and fabricated. Experimental results demonstrated that a drain efficiency of 93.71–94.62% operating from 7.0 to 9.4 MHz, as well as output power (Pout) of 42.1–44.57 dBm and power gain of 14.1–16.57 dB are obtained. The measurement results show good agreements with the simulation results, which may be a potential candidate for electronic article surveillance (EAS) applications operating in the high-frequency band.

Original languageEnglish
Pages (from-to)6802-6822
Number of pages21
JournalCircuits, Systems, and Signal Processing
Volume43
Issue number11
DOIs
Publication statusPublished - Nov 2024

Keywords

  • Broadband
  • Class-E
  • Parallel-circuit
  • Power amplifier
  • Push–pull

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