A sharp skirt notch filter based feedforward 3rd harmonic cancellation scheme for ultra-high frequency wireless communication system in 834-879 MHz

作者：Jung Won Jae^*; Jung Jin Woo; Jang Peter; Park Jun Seok

来源：Microwave and Optical Technology Letters, 2016, 58(4): 1006-1010.

DOI：10.1002/mop.29717

• CMOS integrated circuits
• active filters
• feedforward
• bandpass filters
• 3rd harmonic cancellation

This article presents a feedforward 3rd harmonic cancellation scheme for ultra-high frequency (UHF) wireless communication system in 834-879 MHz. The major features are highlighted: a special notch filter with sharp skirt performance (e.g., both lower and higher band edge from 834 to 879 MHz yield lower than -40 dB cutoff), and micro-controller based amplitude/phase control on feedforward path signal generation for fine harmonic cancellation. A prototype was implemented; it works out 47.36 dBHz(-1) cut-off and 60 dBc ACLR.

• 出版日期2016-4