Noise Analysis, Then and Today
MTT/AP Chapter sponsors talk on "Noise Analysis, Then and Today"
Noise analysis of oscillators, also known as autonomous circuits, was a dream for many years. The first and linear approach must be credited to David Leeson, who took a linear lowpass equivalent circuit and derived his frequently quoted linear formula. This formula requires data which can only be gained after a post prior analysis. The values of the output power, the loaded Q, the large-signal noise factor—frequently confused with noise figure (NF), which is 10log(noise factor)—and the flicker noise contribution are not known a priori, although they may be computed.The introduction of nodal noise analysis in a proper way was published by Hillbrand and Russer. The Lee-Hajimiri noise analysis is interesting but not very practical; while often quoted in the literature, its use is not practically shown. In this talk, speaker will be highlighting the pros & cons of noise analysis and optimization cycle for lower phase noise for the given figure of merit (FOM).
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- Co-sponsored by MTT/AP
- Starts 10 February 2019 03:00 PM UTC
- Ends 15 February 2019 08:00 PM UTC
- No Admission Charge
Speakers
Prof. Ulrich L. Rohde of Professor
Noise Analysis, Then and Today
The introduction of the piecewise linear harmonic balance (HB) method, developed by Vittorio Rizzoli and his team, was the perfect body to include the noise correlation method. The famous nonlinear time domain circuit analysis program SPICE lacks a rigorous noise correlation analysis, and the HB programs are a hybrid of linear (frequency) and nonlinear (time domain) computations. Both publications by Rizzoli and Gilmore were leading on the topic. Rowan Gilmore worked with speaker (Ulrich L. Rohde) duing the development Compact Software time, owned by Rohde. Rohde's team at Compact Software and the Rizzoli team were struggling to validate the results, and it was complicated to get reliable measured data and maintain accuracy and speed. The Compact Software approach and the Rizzoli team were always fighting about this topic. Speaker would like to share his experience telling users that short cuts used in some programs were getting them faster to the wrong answer.
Biography:
Ulrich L. Rohde, (M’74–SM’74–F’02–LF’08) is currently a Professor of RF and Microwave with the University of Cottbus, Germany, Chairman of Synergy Microwave Corp., Patterson, NJ, USA, Professor with Oradea University, Romania, Honorary Professor with IIT Delhi, India, President of Communications Consulting Corporation, FL, USA, and a partner in Rohde & Schwarz, Munich, Germany. He is past member of the board of directors and a former executive vice president of Ansoft Corporation, now Ansys. He has published over 300 scientific papers in professional journals and conferences, coauthored 12 technical books and book chapters, and over 4 dozens patents into his credits. Dr. Rohde is a recipient of more than a dozen scientific and IEEE society awards. In 2006, he was honored as Microwave Legend by Microwave & RF Magazine; the selection was based on global voting. In 2009, he was selected in the list of Divine Innovators of November 2011, Microwave Journal. Based on his five decades of scientific creativity and pioneer contributions in the field of microwave and antenna, IEEE has established 3 awards in his name–the IEEE Ulrich L. Rohde Innovative Conference Paper Awards on Antenna Measurements and Applications, IEEE Ulrich L. Rohde Innovative Conference Paper Awards on Computational Techniques in Electromagnetics, and IEEE Ulrich L. Rohde Humanitarian Technical Field Project Award.
Email:
Address:BTU Cottbus, Electrical Department, Cottbus, Germany, 03046
Agenda
Event Agenda: 5:00PM: Networking
5:30 PM -6:30PM: Presenation on "Noise Analysis, Then and Today"