Eli Schwartz 7/1/16

You are invited to attend a lecture

By

Eli Schwartz

M.Sc. student under the supervision of Prof. Eli Jerby

Electrical Engineering, Physical Electronics Department

Tel Aviv University

Transistor-Based Microwave Generators for Heating Applications

Abstract

In this study, mainly performed in 2005-6, we introduced the potential of replacing conventional magnetrons by solid-state devices for microwave heating, and presented an LDMOS-FET-based miniature microwave heater [Schwartz et al., IMPI 2006]. A more recent comparison among various types of transistors indicates that GaN-HEMT and LDMOS-FET transistors are the most promising technologies for producing microwave power at hundreds of Watts. In this study, a commercial LDMOS device designed as a 20-W power amplifier for communication base-stations has been used to produce heating power up to 200W in a feedback loop oscillator scheme.  This pioneering device was studied in various schemes, including a cavity applicator for fluid heating; an active integrated antenna (AIA) in free space, and a delicate microwave drill (with the LDMOS-FET replacing the previously used magnetron). In addition, a novel method for monitoring varying load impedances in real-time environments was developed in order to be implemented in agile adaptive impedance-matching systems. The seminar will also present the state-of-art in solid-state application for microwave heating, including in future domestic ovens.

Thursday, Jan 07, 2016, at 13:00

Room 011, Kitot building