Patent ID: 6049249
Filing Date: 2000-04-11
Classification: H01J,H03F

Abstract:
A slow wave RF amplifier circuit housed within a vacuum envelope, said amplifier circuit having an an RF input section and an RF output section, said amplifier circuit having an amplification gain variation, .DELTA.G, over a frequency range .DELTA.f, centered on a preselected frequency f.sub.0, said amplifier circuit comprising:a Gain Control Section (GCS) having a length L.sub.C, said GCS coupled between said RF input section and said RF output section;a first mismatch section coupled between said RF input section and said GCS, said first mismatch section having a voltage reflection coefficient, R.sub.a ;a second mismatch section coupled between said GCS and said RF output section, said second mismatch section having a voltage reflection coefficient, R.sub.b ; andsaid first and second mismatch sections operative to create internal reflections in the GCS which produce a ripple signal therein effective to modify said gain variation, .DELTA.G, over said frequency range, .DELTA.f.