Title :
A blocker-tolerant RF front end with harmonic-rejecting N-path filtering
Author :
Yang Xu ; Jianxun Zhu ; Kinget, Peter R.
Author_Institution :
Dept. of Electr. Eng., Columbia Univ., New York, NY, USA
Abstract :
A 0.2-1 GHz RF front end with a harmonic-rejecting N-path filter (HR-NPF) features tunable narrow band filtering as well as high attenuation at the 3rd and 5th order LO harmonics at the LNA output. The B1dB-CP is -2.4dBm at a 20MHz offset, and remains high at the 3rd and 5th LO harmonics thanks to the HR-NPF configuration. The reverse isolation of the LNA helps to keep the LO emission below -90dBm. The two-stage harmonic rejection approach offers >51dB harmonic rejection ratio at the 3rd and 5th LO harmonics without calibration. The front end consumes 26-32mA while occupying an area of 0.77mm2.
Keywords :
UHF amplifiers; UHF filters; harmonics suppression; low noise amplifiers; 3rd order LO harmonics; 5th order LO harmonics; HR-NPF configuration; LNA output; blocker-tolerant RF front end; current 26 mA to 32 mA; frequency 0.2 GHz to 1 GHz; harmonic-rejecting N-path filter; reverse isolation; tunable narrow band filtering; two-stage harmonic rejection approach; Attenuation; Baseband; Frequency measurement; Harmonic analysis; Mixers; Power harmonic filters; Radio frequency; N-path filter; RF front end; Software-defined radio; cognitive radio; harmonic rejection mixer;
Conference_Titel :
Radio Frequency Integrated Circuits Symposium, 2014 IEEE
Conference_Location :
Tampa, FL
Print_ISBN :
978-1-4799-3862-9
DOI :
10.1109/RFIC.2014.6851652
