Microwave Filter Company’s
Iris coupled, Combline and Interdigital bandpass filters are fixed tuned filters that feature sharp stopband rejection and lower losses than comparable discrete element or tubular (transmission line) bandpass filters. Parallel coupled, distributed round rod resonators provide high-Q with small size and excellent bandpass response.

These units are particularly rugged and well suited for military and severe environmental conditions.
The type of filter selected is usually determined by the desired 3 dB bandwidth percentage of center frequency.