Microwave Filters and Passive Components - RF Microtech
Mixed-technology quasi-reflectionless planar filters: bandpass, bandstop, and multi-band designs | International Journal of Microwave and Wireless Technologies | Cambridge Core
Distributed-element filter - Wikipedia
EM.Tempo Tutorial Lesson 5: Analyzing A Planar Microstrip Band-Stop Filter - Emagtech Wiki
SIW FILTER - Overview | ECHO Microwave
Amazon.com : 67mm HD MC UV Filter for: Carl Zeiss Makro-Planar T* 2/100 67mm Ultraviolet Filter, 67mm UV Filter, 67 mm UV Filter : Electronics
Thin Film Planar Band-Pass Filter Chip
Smiths Interconnect - Planar filters continue to advance
Planar X Filter Series | Smiths Interconnect China Official Website
GitHub - jonbarron/planar_filter: A numpy implementation of "planar filtering"