Traveling wave push-pull electron beam deflector with pitch...

Details Traveling wave push-pull electron beam deflector with pitch... Traveling wave push-pull electron beam deflector with pitch...

H - Electricity

01

J

353/3

H01J 25/42 (2006.01) H01J 23/16 (2006.01) H01J 23/24 (2006.01) H01J 29/70 (2006.01)

Patent

CA 1212768

- 35 - ABSTRACT OF THE DISCLOSURE An electron beam deflection structure (10) of the traveling wave type includes first and second deflection members (52 and 58) positioned on opposite sides of and extending along the path of an electron beam (25) to deflect the beam in response to deflection signals applied to the deflection members. In a preferred embodiment, both deflection members are of a meander line type which include a plurality of deflection plate segments (74, 76) connected in series by a plurality of lead portions (78) to form a pair of transmission lines, each transmission line having a characteristic impedance that tends to vary with distance along the path of the electron beam due to a flared spacing between the output portions of the deflection members. Pitch compensation including different pitches for the first and second deflection members increases and maintains substantially uniform the characteristic impedance of each transmission line to prevent reflection of the deflection signal back toward the input end of the line.

438422

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