Stability and noise performance of resistively loaded microwave amplifiers

✍ Scribed by John E. Post

• Book ID: 102520783
• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 97 KB
• Volume: 41
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.20101

✦ Synopsis

Abstract

Resistive loading is a classic technique to guarantee the unconditional stability of microwave amplifiers at the operating frequency, but the amplifier is potentially unstable at other frequencies. A technique is proposed to predict microwave amplifier stability at all frequencies by solving for the stability parameter of the overall cascaded resistor/transistor network. Eight different stabilizing networks are investigated and shown to have very different stabilizing effects as a function of frequency. A method to determine the effect of resistive stabilization on amplifier‐noise performance is presented. These results allow the designer to choose a stabilizing resistor network that provides the best compromise between gain, noise, and stability for a desired application. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 41: 228–231, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20101