Co-Design of Second Harmonic-Tuned Power Amplifier and a Parallel-Coupled Stub Loaded Resonator
IEEE Transactions on Circuits and Systems II: Express Briefs(2020)
摘要
This brief presents a co-design of the second harmonic-tuned broadband power amplifier (PA) in cascade with a stub loaded parallel-coupled lines microstrip bandpass filter. These coupled microstrip lines are bilaterally connected with the shorted stub. Filter parameters are determined by an even-odd mode impedance analysis to ensure the high-selectivity and anti-interference bandpass response. Hence, a proper fundamental and second harmonic impedance matching is realized in the desired regions of the Smith chart. Moreover, an overall circuit size is significantly reduced with easy integration. For validation, the proposed structure is manufactured and tested for a commercial 10-W GaN transistor across 1.6-2.8 GHz (54.5%), with 49.1%-65% measured drain efficiency (DE) and 38-41 dBm of measured output power has been obtained. Also, when this PA-filter circuit is driven by a 5 MHz long term evolution signal with a peak to average power ratio of 8.2 dB, an adjacent channel leakage ratio of lower than -55 dBc is achieved.
更多查看译文
关键词
Broadband,co-design,power amplifier,bandpass filter,high-selectivity,high efficiency
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络