NDLI: New helix tapers boost space TWT efficiency to 55%, broadband

Content Provider	IEEE Xplore Digital Library
Author	Thouvenin, Ph. Henry, D. Pelletier, A.
Copyright Year	1987
Description	Author affiliation: Thomson-CSF Division, Boulogne-Billancourt Cedex, France (Thouvenin, Ph.)
Abstract	The double-tapered helix was introduced fifteen years ago by Thomson-CSF in satellite TWTs. It brought a substantial increase of beam efficiency without degradation of phase linearity. However no real design methodology was then existing in the world. A basic study recently performed by the space tubes R&D group of the Electron Tubes Division of Thomson-CSF has led to a new double taper design, using an original method for pitch profile synthesis and optimization. The basic principle of this method is to significantly increase the RF beam current in the large signal region. The result is a large improvement of beam efficiency, without sacrifying phase linearity and intermodulation. This helix design method has been applied to tubes operating at 7 and 12 GHz with output power levels ranging between 40 and 130 W. Beam efficiencies in the range of 22 to 25%, with phase shifts as low as 20 to 40°, have been achieved in 20% bandwidths, resulting into overall efficiencies reaching 55%.
Starting Page	477
Ending Page	480
File Size	292214
Page Count	4
File Format	PDF
DOI	10.1109/IEDM.1987.191463
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1987-12-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Linearity Design methodology Electron tubes Satellites Degradation Signal synthesis Design optimization Radio frequency RF signals Power generation
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Simulation of 2-section SWS for high gain, high efficiency helix TWT

Optimization of helix pitch profile for broadband Mini-TWTs

Harmonic suppression in a helix TWT using SUNRAY-3D code

Effect of the beam parameters on the non-linear performance in broadband helix TWTs

Ku-band MPM booster helix TWT design and validation

Design of a broadband pulse miniaturization helix TWT efficiency

125 W high linearity Ka band TWT

P2-23: High electron efficiency design for K and Ka band TWT

Design and experiment of a V-band helix TWT

New helix tapers boost space TWT efficiency to 55%, broadband

Similar Documents

Simulation of 2-section SWS for high gain, high efficiency helix TWT

Optimization of helix pitch profile for broadband Mini-TWTs

Harmonic suppression in a helix TWT using SUNRAY-3D code

Effect of the beam parameters on the non-linear performance in broadband helix TWTs

Ku-band MPM booster helix TWT design and validation

Design of a broadband pulse miniaturization helix TWT efficiency

125 W high linearity Ka band TWT

P2-23: High electron efficiency design for K and Ka band TWT

Design and experiment of a V-band helix TWT

New helix tapers boost space TWT efficiency to 55%, broadband