YANG Wen-qi, ZHONG Shi-chang, LI Yu-chao. 80W GaN Power Amplifier with Ultra Wideband of 1~4GHz[J]. Acta Electronica Sinica, 2019, 47(8): 1803-1808. DOI: 10.3969/j.issn.0372-2112.2019.08.026.
Based on the 0.25μm GaN HEMT process platform of Nanjing Institute of Electronics Technology
an ultra-wideband power amplifier with an operating frequency of 1~4GHz and a continuous wave output power greater than 80W is designed. The amplifier uses a low-pass LC matching network to achieve the conversion of the input and output impedance of the die to the real impedance
and the ultra-wideband matching is realized by the Chebyshev converter structure; after the single input/output port is matched to 100Ω
the two direct circuits are synthesized to 50Ω. The method achieves power synthesis of a high-power ultra-wideband power amplifier. The amplifier has a bias voltage of 32V and a quiescent current of 0.4A. The test results show that in the bandwidth of 1~4GHz
the continuous wave output power of the amplifier is greater than 49.05dBm (80.3W)
the maximum output power is 50.6dBm (114.8W)
the saturation power gain is greater than 9dB
and the power flatness is less than ±0.8dB.The maximum drain efficiency is 62.5%.