ACPR comparison of low pass and band pass type power amplifier for 22 Mbps wireless LAN application

This paper reports the ACPR (adjacent channel power ratio) effects of matching network topology. To investigate the out-of-band termination effects, low pass filter (LPF) and band pass filter (BPF) type power amplifiers are designed. The LPF type shows a maximum 5 dB ACPR improvement on the BPF type. ACPR degradation by phase nonlinearity is also predicted with simple AM-to-PM modeling.

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