An Inter-Stage Filter Network for Distortion Reduction in Concurrent Dual-Band Power Amplifier Operation
An Inter-Stage Filter Network for Distortion Reduction in Concurrent Dual-Band Power Amplifier Operation
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DOI：
10.23919/apmc55665.2022.9999722
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发表时间：
2022-11
期刊：
影响因子：
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通讯作者：
William Sear;Nathan Biesterfeld;Saraunsh Bayaskar;T. Barton
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文献类型：
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作者：
William Sear;Nathan Biesterfeld;Saraunsh Bayaskar;T. Barton
本文提出了一种新的方法，用于减少在并发的双频带功率放大器（PA）中产生的带外失真，而不惩罚输出功率或效率，使用驱动放大器和末级PA之间的滤波器，该滤波器操纵驱动放大器的带外失真，使得级联的整体失真最小化。级联PA工作在2.4 GHz和3.5 GHz，峰值输出功率和漏极效率分别为41.6/40.4和65.2/55.1。该滤波器将级联的带外失真在双10 MHz LTE类信号激励时降低了10 dB，同时将平均漏极效率提高了5个百分点。
This work presents a novel approach for reducing the out-of-band distortion generated in a concurrent dual-band power amplifier (PA) without penalty to output power or efficiency using a filter between a driver amplifier and final-stage PA that manipulates the driver amplifier out-of-band distortion such that the overall distortion of the cascade is minimized. The cascaded PA operates at 2.4-GHz and 3.5-GHz with peak output power and drain efficiency of 41.6/40.4 and 65.2/55.1 respectively. The filter reduces the out-of-band distortion of the cascade when excited by dual 10-MHz LTE-like signals by 10 dB while improving average drain efficiency by 5 percentage points.