NASA NTRS · 19760000295
Band-elimination filter
Abstract
Helical resonator is employed to produce stable, highly selective filter. Other features of filter include controlled bandwidth by cascading identical stages and stagger tuning, adjustable notch depth, good isolation between stages, gain set by proper choice of resistors, and elimination of spurious responses.
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Shelton, G. B.. 1977-01-01. Band-elimination filter. https://ntrs.nasa.gov/citations/19760000295
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