A Wide Range Tunable and Matchable High Temperature Applicator,
Abstract
Tuning and matching is vital for a resonant microwave material processing applicator. A wide range tunable and matchable, resonant, high temperature, microwave applicator is proposed consisting of a coaxial cavity with a gap cutting its center conductor. It can be tuned and matched for different gap loads, ranging from air to water, by adjusting two non-contact short circuit plungers. This scheme varies the internal impedance or energy storage in contrast to using external tuning reactances. A simple, analytic, lumped parameter circuit is obtained for an arbitrarily positioned gap in the center conductor using an artificial electric wall concept. Based on this, an equivalent circuit model is built to characterize the internal tuning and matching mechanism. As an application example, 3 mm and 5 mm diameter mullite. rods were joined successfully, without an intermediary, using less than 60 W of microwave power at 915 MHz for 10 minutes.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 27, 1992
- Accession Number
- ADP007779
Entities
People
- B. Q. Tian
- W. R. Tinga
Organizations
- University of Alberta