Design of a Ku-band Gilbert mixer with gain, noise figure and linearity enhancement

Author

Elyasi, Hedieh ; Nabavi, A.

Author_Institution

Tarbiat Modares Univ., Tehran, Iran

fYear

2011

fDate

17-19 May 2011

Firstpage

1

Lastpage

1

Abstract

This paper presents the first Ku-band (12-18 GHz) mixer employs a Post Distortion Cancellation (PDC) technique to absorb the Third Order Intermodulation Distortion (IMD3) generated by transconductance stage. As the parasitic capacitances degrade the gain, noise figure and linearity of the circuit, an extra inductor is added between source nodes of switching transistors to enhance all the above three features. Simulations in a 0.18-μm CMOS technology demonstrate 4.1 dB IIP3 improvement compared to conventional Gilbert mixer. The gain and noise figure are also improved by approximately 0.6 dB and 1 dB in the entire band, respectively. The proposed circuit draws only 3-mA from a 1.8-V supply, which appears to be the same power as that in conventional mixer.

Keywords

CMOS integrated circuits; MMIC mixers; field effect MMIC; inductors; intermodulation distortion; CMOS technology; Ku-band Gilbert mixer; frequency 12 GHz to 18 GHz; linearity enhancement; noise figure; post distortion cancellation technique; size 0.18 mum; source nodes; third order intermodulation distortion; transconductance stage; voltage 1.8 V; CMOS Gilbert mixer; Ku-band; flicker noise; linearity; post distortion;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Engineering (ICEE), 2011 19th Iranian Conference on

Conference_Location

Tehran

Print_ISBN

978-1-4577-0730-8

Type

conf

Filename

5955873