NDLI: Progress on implementation of a frequency agile, high power backward-wave oscillator

Content Provider	IEEE Xplore Digital Library
Author	Abdallah, C.T. Schamiloglu, E. Souvalian, V.S. Park, G.T.
Copyright Year	1997
Description	Author affiliation: Dept. of Electr. & Comput. Eng., New Mexico Univ., Albuquerque, NM, USA (Abdallah, C.T.)
Abstract	Summary form only given, as follows. Recent work at the University of New Mexico has demonstrated that finite length effects in a high power vacuum backward wave oscillator (BWO) can be exploited to achieve frequency agility for constant beam and magnetic field parameters. Specifically, the axial displacement of the slow wave structure with respect to the cutoff neck "inlet" to the electrodynamic system results in a periodic variation of both radiated power and frequency. In this presentation we discuss progress in automating this axial "shifting" on a shot-to-shot basis using compact precision motors. This capability will then facilitate the use of a robust controller to achieve various control objectives. In particular, the preliminary design of a controller to i) maximize the frequency bandwidth for a given constant power output, ii) maximize the power radiated at a given frequency in the bandwidth, and iii) maximize the beam-to-peak microwave power conversion efficiency will be presented.
Starting Page	191
Ending Page	192
File Size	218262
Page Count	2
File Format	PDF
ISBN	0780339908
ISSN	07309244
DOI	10.1109/PLASMA.1997.604789
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-05-19
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Automatic control Frequency conversion Bandwidth Oscillators Periodic structures Neck Electrodynamics Cutoff frequency Robust control Power conversion
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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