A Sub-pulses Generation Method for Third-Harmonic Elimination of 5-level RF-PWM

Zhang, Qiang; Li, Zhu; Fu, Haoyang; Wei, Zhihu; Zhang, Jianya

doi:10.1109/iwem53379.2021.9790688

2021 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM) 2021

DOI: 10.1109/iwem53379.2021.9790688

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A Sub-pulses Generation Method for Third-Harmonic Elimination of 5-level RF-PWM

Qiang Zhang¹,

Zhu Li²,

Haoyang Fu

et al.

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Cited by 2 publications

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“…Based on GaN based half-bridge SMPA chips [7], ADTx can synthesize and amplify the RF-PWM signal. When multiple SMPA units work at the same time, the unbalanced transmission power of GaN devices between and within SMPA units will bring additional loss and distortion [8].…”

mentioning

confidence: 99%

A novel all-digital transmitter with power equalization and harmonic elimination

Zhou

Zhu

et al. 2022

Preprint

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To reduce the loss caused by power imbalance between switched-mode power amplifier (SMPA) units of all-digital transmitters (ADTx), this paper proposes an all-digital transmitter structure with power equalization and harmonic elimination. Based on the third and fifth harmonic cancellation, this structure achieves output power equalization of SMPA by controlling the width of 3-level sub-pulses to be the same. Moreover, the equalization of each switch transistor is realized by outphasing method. Finally, the feasibility of the method is verified by simulation results. For different input signals with a carrier frequency of 200 MHz, the proposed structure achieves the same output power of each SMPA unit.

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mentioning

confidence: 99%

A novel all-digital transmitter with power equalization and harmonic elimination

Zhou

Zhu

et al. 2022

Preprint

Self Cite

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“…1. When multiple SMPA units work at the same time, the unbalanced transmission power of GaN devices between and within SMPA units will bring additional loss and distortion [8].…”

mentioning

confidence: 99%

“…The filter bandwidth was greatly improved in this scheme. To reduce the loss caused by power imbalance of the SMPA, a subpulse generation method was proposed [8]. The method generated two sub-pulses with equal pulse width, with the third harmonic elimination.…”

mentioning

confidence: 99%

A power equalization RF-PWM method with third and fifth harmonic elimination

Zhou

Zhu

et al. 2022

Preprint

Self Cite

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To reduce the power loss of the SMPA unit, this paper proposes a power equalization RF-PWM method with third and fifth harmonic elimination. Based on the third and fifth harmonic cancellation, this method achieves output power equalization of SMPA by controlling the width of 3-level sub-pulses to be the same. Moreover, the equalization of each switch transistor is realized by outphasing architectures. Finally, the feasibility of the method is verified by simulation results. For QPSK and 16QAM signals with a carrier frequency of 200 MHz, the proposed method achieves the same output power of each SMPA unit.

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A Sub-pulses Generation Method for Third-Harmonic Elimination of 5-level RF-PWM

Cited by 2 publications

References 6 publications

A novel all-digital transmitter with power equalization and harmonic elimination

A novel all-digital transmitter with power equalization and harmonic elimination

A power equalization RF-PWM method with third and fifth harmonic elimination

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