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

fYear

2014

fDate

1-3 June 2014

Firstpage

39

Lastpage

42

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio Frequency Integrated Circuits Symposium, 2014 IEEE

Conference_Location

Tampa, FL

ISSN

1529-2517

Print_ISBN

978-1-4799-3862-9

Type

conf

DOI

10.1109/RFIC.2014.6851652

Filename

6851652