Abstract: A multi-channel microwave switched filter bank, wherein the input circuitry and output circuitry are mounted on opposite sides of the filter bank, providing a compact structure with excellent isolation. The filter bank includes a set of microwave band pass filter circuits. A housing structure provides an outer conductive peripheral frame structure. A rack structure disposed within the housing structure has a plurality of elongated slots for mounting therein corresponding ones of the plurality of filter circuits. A top dielectric substrate board is mounted adjacent a first side of the rack structure and has a first set of openings formed therein for providing access to a first set of input/output (I/O) ports of the plurality of filter circuits. A bottom dielectric substrate board is mounted adjacent a second side of the rack structure opposite the first side and has a second set of openings formed therein for providing access to a second set of input/output (I/O) ports of the plurality of filter circuits.