A microstripline/stripline included in an isolator/circulator is provided. The microstripline/stripline includes a resonator including a plurality of symmetric propellers, which are capable of transmitting signals in a single direction, slot formation units formed between the propellers to allow magnetic...http://www.google.de/patents/US6646515?utm_source=gb-gplus-sharePatent US6646515 - Isolator/circulator having propeller resonator loaded with a plurality of symmetric magnetic walls
