Recent Market Driven Filter Advances

Comparing volumes, a typical 8-section lumped element filter at 2 GHz might be 2.0" x 0.6" x 0.4" in size, and an equivalent air cavity combline would be even larger at 5.9" x 1.8" x 0.9". A thin film approach drastically reduces size to about 0.4" x 0.4" x 0....

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Bibliographic Details
Published inMicrowave Journal Vol. 57; no. 11; p. 24
Main Authors Howett, David, Busse, Michael P, Rawlinson, David, Burkett, Jeff, Dolan, Tim, Hershtig, Rafi, King, Douglas
Format Trade Publication Article
LanguageEnglish
Published Dedham Horizon House Publications, Inc 01.11.2014
EditionInternational ed.
Subjects
Bandwidths
Budget deficits
Competition
Dielectric properties
Innovations
Musical performances
Noise
Radio frequency
Spectrum allocation
Technological change
Thin films
Trends
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Summary:Comparing volumes, a typical 8-section lumped element filter at 2 GHz might be 2.0" x 0.6" x 0.4" in size, and an equivalent air cavity combline would be even larger at 5.9" x 1.8" x 0.9". A thin film approach drastically reduces size to about 0.4" x 0.4" x 0.14" (including cover). This reduction in size is facilitated by the high dielectric constant of the ceramic substrate base, typically featuring an er of more than 25.
ISSN:0192-6225