Title :
Novel coupled-cavity TWT structure using two-step LIGA fabrication
Author :
Shin, Young-Min ; Park, Gun-Sik ; Scheitrum, Glenn P. ; Arfin, Bernard
Author_Institution :
Sch. of Phys., Seoul Nat. Univ., South Korea
Abstract :
In order to make millimeter-wave sources practical, improved fabrication methods are required. The use of Lithographie, Galvanoformung, Abformung; German acronym (LIGA) to fabricate a coupled-cavity traveling-wave tube (TWT) is presented. The proposed circuit design will focus on two-step LIGA fabrication and dual in-line ladder structure with a rectangular beam tunnel. The fabrication sequence of two-step LIGA is illustrated and the advantages and tradeoff of this approach are described. Three electromagnetic codes-HFSS, GdfidL, and MAGIC3D-are employed to analyze the circuit characteristics in cold and hot test simulations. Finally, the results from small and large signal analyses are presented to verify the validity of the circuit design.
Keywords :
LIGA; computational electromagnetics; impedance matching; millimetre wave generation; surface roughness; travelling wave tubes; circuit design; cold test simulations; coupled-cavity TWT structure; coupled-impedance; dimensional accuracy; dual in-line ladder structure; electromagnetic codes; electron interception; hot test simulations; large signal analyses; millimeter-wave sources; particle-in-cell code; rectangular beam tunnel; small signal analyses; surface roughness; tolerances; two-step LIGA fabrication; Analytical models; Circuit analysis; Circuit simulation; Circuit synthesis; Circuit testing; Coupling circuits; Electromagnetic analysis; Fabrication; Millimeter wave circuits; Millimeter wave technology;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2003.820677
