Design of a High-Power and High-Efficiency GaN-HEMT VCO Based on an Inverse Class-F Amplifier
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866915656939601920 |
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| author | Mi, Junlin Fan, Ruinan Yan, Liping Feng, Yuhao Liu, Changjun |
| author_facet | Mi, Junlin Fan, Ruinan Yan, Liping Feng, Yuhao Liu, Changjun |
| contents | This letter proposes a high-power and high-efficiency GaN-HEMT voltage-controlled oscillator. The VCO consists of a coupled-line coupler, an inverse class-F amplifier, and a novel frequency-tunable stepped-impedance resonator. Using a harmonic control circuit and a parasitic parameter compensation circuit, the power amplifier operates in the inverse class-F state to achieve high efficiency. The feedback circuit uses a coupled-line coupler instead of the traditional coupling capacitor to control feedback power precisely. The measurement results show that the VCO with an oscillation frequency of 2.41-2.45 GHz achieves a maximum conversion efficiency of 74.5% at 2.44 GHz and an output power of 40.2 dBm. It is a candidate for the microwave source in a wireless power transmission system. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_05846 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Design of a High-Power and High-Efficiency GaN-HEMT VCO Based on an Inverse Class-F Amplifier Mi, Junlin Fan, Ruinan Yan, Liping Feng, Yuhao Liu, Changjun Applied Physics This letter proposes a high-power and high-efficiency GaN-HEMT voltage-controlled oscillator. The VCO consists of a coupled-line coupler, an inverse class-F amplifier, and a novel frequency-tunable stepped-impedance resonator. Using a harmonic control circuit and a parasitic parameter compensation circuit, the power amplifier operates in the inverse class-F state to achieve high efficiency. The feedback circuit uses a coupled-line coupler instead of the traditional coupling capacitor to control feedback power precisely. The measurement results show that the VCO with an oscillation frequency of 2.41-2.45 GHz achieves a maximum conversion efficiency of 74.5% at 2.44 GHz and an output power of 40.2 dBm. It is a candidate for the microwave source in a wireless power transmission system. |
| title | Design of a High-Power and High-Efficiency GaN-HEMT VCO Based on an Inverse Class-F Amplifier |
| topic | Applied Physics |
| url | https://arxiv.org/abs/2512.05846 |