Title :
Noise analysis of bipolar harmonic mixer
Author :
Tanimoto, Hiroshi ; Ito, Ryuta
Author_Institution :
Dept. of Electr. & Electron. Eng., Kitami Inst. of Technol., Japan
Abstract :
A noise analysis of bipolar harmonic mixer (BHMIX) for use with direct conversion receiver mixers is presented. The optimal conditions (LO amplitude, total collector current) of using BHMIX are given. This analysis considers thermal noise from base resistance and shot noise from collector current. These noises are treated as amplitude modulated white noises, which are characterized as cyclostationary noise. Assuming that input RF signal is very small, the BHMIX circuit is modeled as LO driven linear time varying circuit to calculate dependence of output noise on the LO amplitude. The analysis agreed well with measured data.
Keywords :
bipolar transistor circuits; circuit noise; harmonic analysis; mixers (circuits); oscillators; receivers; shot noise; thermal noise; time-varying networks; white noise; LO driven circuit; RF signals; bipolar harmonic mixer; circuit noise analysis; collector current; cyclostationary noise; direct conversion receiver mixers; linear time varying circuit; shot noise; thermal noise; white noise; Amplitude modulation; Circuit noise; Harmonic analysis; Indium tin oxide; Noise generators; Noise level; RF signals; Signal to noise ratio; Thermal resistance; White noise;
Conference_Titel :
Circuits and Systems, 2004. MWSCAS '04. The 2004 47th Midwest Symposium on
Print_ISBN :
0-7803-8346-X
DOI :
10.1109/MWSCAS.2004.1354369
