Double Ridge Waffle
This double ridge waffle-iron filter works in 3.4-8 Ghz band. It’s granted the frequencies rejection from 13 GHz to 15 GHz in Ku band.
This filter was realized on behalf of INFN-LNS for experimental purposes about propagation on plasma.
![](https://www.sicilsat.com/wp-content/uploads/2021/06/IMG_4017-768x1024-1.jpg)