desired metallization pattern is a mirror image of each other for substrates 103 and 104 the requisite metallization pattern needed to fabricate each of the circulators is well known in the art and will depend on the frequency and bandwidth requirements of the application the technique used to fabricate the dual stacked stripline circulator 100 is not dependent on any specific metallization pattern and any known metallization pattern used for y junction circulators may be used referring now to fig2 d the substrate 103 is bonded to the substrate 104 and in a similar manner the substrate 101 is bonded to substrate 102 in preparation a thick film sealing glass is printed on a surface of the substrates 101 and 103 and dried at 150 degrees c and a thick film gold via fill is printed on substrates 101 and 103 and dried at 150 degrees c in a similar manner a thick film gold via fill is printed on substrates 102 and 104 and substrate 103 is mounted with substrate 104 and substrate 101 is mounted with substrate 102 and dried at 150 degrees c the stacked substrates 103 and 104 and the stacked substrates 101 and 102 are then fired at 750 degrees c this generates a first pair.