Impacts of impedance mismatch on the performance of RF mixers

Author

Salmeh, Rogoyeh

Author_Institution

ATCO Electr., Calgary, AB, Canada

fYear

2011

fDate

25-28 Sept. 2011

Firstpage

27

Lastpage

31

Abstract

The impacts of impedance matching on the performance of a radio frequency (RF) front-end mixer are studied. A fully differential double balanced Gilbert cell mixer has been considered in this work. The matching requirements for the low noise amplifier (LNA) and local oscillator (LO) are investigated. A novel solution to use the LNA output capacitors as a matching network is presented. Effects of the layout resistive and capacitive parasitics on the mixer image rejection are highlighted. Creative methods to reduce the impact of the layout parasitic impedances are presented.

Keywords

UHF amplifiers; UHF integrated circuits; UHF mixers; capacitance; electric resistance; impedance matching; integrated circuit layout; low noise amplifiers; LNA; RF mixer performance; capacitive parasitic; frequency 1.575 GHz; fully differential double balanced Gilbert cell mixer; impedance matching; impedance mismatch; layout parasitic impedance; local oscillator; low noise amplifier; mixer image rejection; output capacitor; radio frequency front end mixer; resistive parasitic; Capacitors; Impedance; Impedance matching; Layout; Mixers; Noise figure; Radio frequency; Image Rejection; Impedance Matching; Layout Parasitic; RF Mixer Inputs Matching;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Technology and Applications (ISWTA), 2011 IEEE Symposium on

Conference_Location

Langkawi

Print_ISBN

978-1-4577-1496-2

Type

conf

DOI

10.1109/ISWTA.2011.6089546

Filename

6089546