resonator s to an advantageous value it creates other problems in the fabrication process thereof ceramic unlike teflon or other plastic materials is substantially non resilient as a consequence very different assembly techniques are required the most commonly used methodology is the metallization of the ceramic substrate halves which then may be permanently attached together by a suitable molten solder process as will be described in more detail herein subsequently the present invention is directed to stripline filter arrangements which are fabricated with ceramic or like material such a stripline filter assembly is shown in fig2 at 20 this filter includes a base 22 and a cover 24 of properly dimensioned ceramic material each of these ceramic filter halves is metallized with a ground plane on the outer surface such as shown in fig1 at 12 and 14 these ground planes extend at least in part around the edges thereof to form a strip or border 26 on the inner surface substantially as shown continuity between the outer ground planes to the inner borders 26 is maintained by the various vias 38 which continue the metallization from the ground plane to the inner borders 26 at strategic locations around the periphery of the filter 20 to complete the metallization a resonator structure is included on the inner surface in the embodiment as shown one such resonator circuit is constructed to be the mirror image of the other however it is to be understood that this mirror imaging of resonator circuits need not be effected the resonators.