Title :
CAD of an X-band TWT interaction circuit with experimental validation
Author :
Lopes, Daniel Teixeira ; Motta, Claudio Costa
Author_Institution :
Inst. de Pesquisas Energeticas e Nucl. - IPEN, Sao Paulo, Brazil
Abstract :
In this paper we present results obtained while testing the 3D electromagnetic solver CST Microwave Studio as a CAD tool in the design of some parts of the beam-wave interaction circuit of an X-band traveling-wave tube. A pair of impedance transformers, present in the input and output microwave ports of the interaction circuit, was characterized by simulating and measuring its voltage stand wave ratio. The interaction circuit based on a ring-bar slow-wave structure was simulated using both the eigenmode and the frequency domain solvers of the CST Microwave Studio. The phase velocity and the interaction impedance, also named ¿cold parameters¿, were simulated by direct and indirect methods and the results compared to experimental ones.
Keywords :
CAD; eigenvalues and eigenfunctions; electronic engineering computing; impedance convertors; microwave circuits; microwave tubes; travelling wave tubes; 3D electromagnetic solver; CAD tool; CST microwave studio; X-band TWT interaction circuit; X-band traveling-wave tube; beam-wave interaction circuit; eigenmode; experimental validation; frequency domain solvers; impedance transformers; interaction impedance; phase velocity; ring-bar slow-wave structure; voltage stand wave ratio; Circuit simulation; Circuit testing; Design automation; Electromagnetic measurements; Frequency domain analysis; Impedance measurement; Microwave circuits; Microwave measurements; Transformers; Voltage measurement; component; impedance transformer; interaction impedance; phase velocity; slow-wave structure;
Conference_Titel :
Microwave and Optoelectronics Conference (IMOC), 2009 SBMO/IEEE MTT-S International
Conference_Location :
Belem
Print_ISBN :
978-1-4244-5356-6
Electronic_ISBN :
1679-4389
DOI :
10.1109/IMOC.2009.5427592
