A method for producing a re-entrant type resonant cavity and the cavity

摘要

It includes a first metallized molded plastic components 18, 18 components, re-entrant type resonant cavity 12 includes a cylindrical side wall 13 re-entrant stub 17, and end wall 14,. Component 18 is surface mounted soldered to the metallized PCB substrate 19. It is positioned opposite the end surface 21 of the stub 17, Rosutoramu 24 defines the volume of the gap 22 and the end face 21. The relative rotation between the stub Rosutoramu 24 and 17, the profile of the gap 22, thus Rosutoramu 24 and end face 21 of the stub 17 is configured to change the gap capacitance. By positioning an appropriate two parts during manufacture, specific capacitance is selected, it may provide the desired resonant frequency by the choices available in accordance with the relative angular position of Rosutoramu 24 and stub 17. In another cavity, Rosutoramu is replaced by metallization layer that is etched on the printed circuit board.