Multilayer thin film dielectric bandpass filter

Details Multilayer thin film dielectric bandpass filter Multilayer thin film dielectric bandpass filter

G - Physics

02

B

G02B 5/26 (2006.01) G02B 5/28 (2006.01) H04J 14/02 (2006.01)

Patent

CA 2254679

The present invention relates to a multi-layer dielectric bandpass filter having a primary and a secondary passband. A secondary passband outside the reflection zone of the primary passband is optimized to reduce ripple achieving a passband of at least 90% transmission. Optimization comprises modifying the thickness of certain quarter wavelength reflector layers of a single passband filter from true quarter wavelength at the primary passband to non-quarter, or non-integer-multiple quarter wave thickness.

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