The novel circulator includes a substrate, a predetermined number of microstrip lines disposed on a first surface of the substrate, a ground layer and a predetermined number of electrical contacts disposed on {TAIL ~ the second surface} of the substrate, and {HEAD ~ a mechanism} for coupling each microstrip line to one of the electrical contacts 
The novel circulator includes a substrate , a predetermined number of microstrip lines disposed on a first surface of the substrate , a ground layer and a predetermined number of electrical contacts disposed on { TAIL ~ the second surface } of the substrate , and { HEAD ~ a mechanism } for coupling each microstrip line to one of the electrical contacts
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