coupler showed 50 db coupling with 30 db of directivity at approximately 890 mhz it is noted that this specific example of a microwave coupler met coupling requirements u00b1 0 5 db in the frequency range of 824 to 894 mhz the coupling factor changed from 50 db at 890 mhz to 49 1 db at 1 000 mhz a photograph of the assembled test unit is shown in fig2 fig3 shows the test unit disassembled in fig3 the coupler planar transmission line is visible as well as the coaxial main transmission line fig4 shows the coupling structure with the attached connector fig5 is a schematic illustration of the described embodiment schematically the present invention is similar to known coupler configurations but with significantly reduced physical size and no tuning requirements the coupling factor and the directivity are provided by standard relationships as follows c ue89e ue89e o ue89e ue89e u ue89e ue89e p ue89e ue89e l ue89e ue89e i ue89e ue89e n ue89e ue89e g ue8a0 db 10 ue89e log ue89e p ue89e ue89e o ue89e ue89e w ue89e ue89e e ue89e ue89e r ue89e ue89e o ue89e ue89e f ue89e ue89e f ue89e ue89e o ue89e ue89e r ue89e ue89e w ue89e ue89e a ue89e ue89e r ue89e ue89e d ue89e ue89e s ue89e ue89e i ue89e ue89e g ue89e ue89e n ue89e ue89e a ue89e ue89e l p ue89e ue89e o ue89e ue89e w ue89e ue89e e ue89e ue89e r ue89e ue89e o ue89e ue89e f ue89e ue89e c ue89e ue89e o ue89e ue89e u ue89e ue89e p ue89e ue89e l ue89e ue89e e ue89e ue89e d ue89e ue89e s ue89e ue89e i ue89e ue89e g ue89e ue89e n ue89e ue89e a ue89e ue89e l d ue89e ue89e i.