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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2511.12137 |
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| _version_ | 1866912712023343104 |
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| author | Wang, Zheng Li, Yifu Mei, Yuchao Sui, Xinyu Li, Qingbin Luo, Xu Wang, Rui Ni, Dongxin Pang, Jian |
| author_facet | Wang, Zheng Li, Yifu Mei, Yuchao Sui, Xinyu Li, Qingbin Luo, Xu Wang, Rui Ni, Dongxin Pang, Jian |
| contents | This paper presents a transformer-based three- transmission-line (Tline) series Doherty power amplifier (PA) implemented in 65-nm CMOS, targeting broadband K/Ka-band applications. By integrating an impedance-scaling network into the output matching structure, the design enables effective load modulation and reduced impedance transformation ratio (ITR) at power back-off when employing stacked cascode transistors. The PA demonstrates a -3-dB small-signal gain bandwidth from 22 to 32.5 GHz, a saturated output power (Psat) of 21.6 dBm, and a peak power-added efficiency (PAE) of 39%. At 6dB back-off, the PAE remains above 24%, validating its suitability for high- efficiency mm-wave phased-array transmitters in next-generation wireless systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_12137 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A 24-GHz CMOS Transformer-Based Three-Tline Series Doherty Power Amplifier Achieving 39% PAE Wang, Zheng Li, Yifu Mei, Yuchao Sui, Xinyu Li, Qingbin Luo, Xu Wang, Rui Ni, Dongxin Pang, Jian Signal Processing This paper presents a transformer-based three- transmission-line (Tline) series Doherty power amplifier (PA) implemented in 65-nm CMOS, targeting broadband K/Ka-band applications. By integrating an impedance-scaling network into the output matching structure, the design enables effective load modulation and reduced impedance transformation ratio (ITR) at power back-off when employing stacked cascode transistors. The PA demonstrates a -3-dB small-signal gain bandwidth from 22 to 32.5 GHz, a saturated output power (Psat) of 21.6 dBm, and a peak power-added efficiency (PAE) of 39%. At 6dB back-off, the PAE remains above 24%, validating its suitability for high- efficiency mm-wave phased-array transmitters in next-generation wireless systems. |
| title | A 24-GHz CMOS Transformer-Based Three-Tline Series Doherty Power Amplifier Achieving 39% PAE |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2511.12137 |