Exceed Microwave can provide low insertion loss waveguide filters using high Q resonators such as TE11X and TE01X. These filters have extremely high power handling capabilities. 

We also have proprietary designs which significantly reduce the size of waveguide filters and diplexers.

Band-pass, Band-stop (notch), Low-pass, and High-pass Filters are all available.  Exceed Microwave can make the filters using the material Invar so that the filter performance will be extremely stable over temperature.