Title :
A Study of second-order nonlinearity in a single-ended RF input Gilbert mixer
Author :
Ye, R.F. ; Horng, T.S. ; Wu, J.M.
Author_Institution :
Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan
Abstract :
This paper investigates the second-order input intercept point (IIP2) of a 2.6 GHz Gilbert mixer RFIC with a signal-ended RF input. The 2.6 GHz Gilbert mixer is designed and implemented in 0.15-¿m InGaAs pseudomorphic high electron mobility transistor (PHEMT) foundry process. The IIP2 of the single-ended RF input Gilbert mixer is degraded by 12 dB due to unbalanced RF signal when compared to the fully differential RF input Gilbert mixer. The adaptive biasing in a switching stage of a Gilbert mixer is used to compensate the IIP2. The proposed technique improves the IIP2 by 19 dB without at cost of the conversion gain.
Keywords :
high electron mobility transistors; microwave mixers; InGaAs; PHEMT; frequency 2.6 GHz; pseudomorphic high electron mobility transistor foundry process; second-order input intercept point; single-ended RF input Gilbert mixer; size 0.15 mum; Degradation; Electron mobility; Foundries; HEMTs; Indium gallium arsenide; MODFETs; PHEMTs; RF signals; Radio frequency; Radiofrequency integrated circuits; (IIP2); Mixer; nonlinearity; second-order input intercept point;
Conference_Titel :
Microwave Conference, 2009. APMC 2009. Asia Pacific
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-2801-4
Electronic_ISBN :
978-1-4244-2802-1
DOI :
10.1109/APMC.2009.5384413
