On the load-pull effect in MMIC oscillator measurements
- 23 April 2004
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
Abstract
Low phase-noise MMIC oscillators are key components for microwave and nun-wave systems. As a consequence, phase-noise measurements of these circuits have become a subject of growing interest and importance. This paper demonstrates that MMIC oscillator circuits with their relatively low Q factors are prone to specific measurement errors. Caused by a load-pull effect, the measurement system can become part of the oscillator, which yields phase-noise data significantly below reality. Special care has to be taken in order to avoid such phenomena.Keywords
This publication has 4 references indexed in Scilit:
- Low phase-noise GaInP/GaAs-HBT MMIC oscillators up to 36 GHzPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Transmission-line stabilized monolithic oscillatorsIEEE Transactions on Microwave Theory and Techniques, 2001
- High performance InGaP/GaAs HBTs for mobile communicationsElectronics Letters, 2000
- A simple model of feedback oscillator noise spectrumProceedings of the IEEE, 1966