RF monoblock filter with recessed top pattern and cavity providing improved attenuation

摘要: An electrical signal filter defined by a block of dielectric material with top, bottom, and side surfaces, through-holes extending between the top bottom surfaces. In one embodiment, plurality walls extend outwardly from surface to define peripheral rim cavity. A pattern metallized unmetallized areas is on selected surfaces including an area metallization covering portion at least input/output electrode wall. pair electrodes are formed posts adapted for mounting printed circuit board against coupled respective pads board.