Title :
Matching of the helix with coaxial coupler
Author :
Chan-Wook Baik ; Baofu Jia ; Soon-Shin Jung ; Gun-Sik Park
Author_Institution :
Vacuum Electrophys. Lab., Seoul Nat. Univ., South Korea
Abstract :
Helical slow-wave structure has been widely used to obtain broad-band in TWTs. Its excellent wide-band characteristic is applied continuously to commercial communications and military radar sources as known as helix-TWTs, however, the impedance matching of the helix circuit with input or output transmission lines is still an important issue to be operated with low reflection. In this paper, the matching is calculated using an equivalent circuit theory to obtain broad-band, and the analysis is presented in detail with the theoretical methods on characteristic impedance of helix and matching of the circuit to the coaxial transmission line with a vacuum window.
Keywords :
equivalent circuits; impedance matching; slow wave structures; waveguide couplers; TWTs; coaxial coupler; coaxial transmission line; equivalent circuit theory; helical slow-wave structure; helix circuit; helix-TWTs; impedance matching; input transmission lines; low reflection; output transmission lines; vacuum window; wideband characteristic; Blades; Coaxial components; Dielectrics; Distributed parameter circuits; Frequency; Impedance matching; Power transmission lines; Reflection; Transmission line matrix methods; Transmission line theory;
Conference_Titel :
Infrared and Millimeter Waves, 2000. Conference Digest. 2000 25th International Conference on
Conference_Location :
Beijing, China
Print_ISBN :
0-7803-6513-5
DOI :
10.1109/ICIMW.2000.893054
