Filters are extremely important in systems. They reject unwanted harmonics of an LO, the other sideband in an upconverter, limit the band of an RF input or isolate channels in a transceiver. Below is a list of Spacek Labs filter products.

Ultra-wide Bandpass FiltersWide bandpass filters are created using a combination of Low Pass Filter and a High Pass Filter.
Narrow Bandpass FiltersThese are low loss filters that have sharp skirts.
Low-pass FiltersLow Pass Filters can reject out to five times the cut-off frequency and have low loss.
High-pass FiltersThese filters use cut-off waveguide to reject frequencies below the desired frequency.