| 摘要 |
PURPOSE: A microwave circulator is provided to simplify a structure, reduce whole size, weight, and insertion loss of a microwave and bandwidth by realizing a magnetic substance into a circular shape. CONSTITUTION: A circular crossing part(11) has a plurality of microstrip routes, which intersect each other. The crossing part(11) is formed on an upper surface of a substrate(10) and has a thin film shape. A shield plate is formed on a lower surface of the substrate(10) and has a thin film shape. A pair of magnetic substances(20) are shaped like a cylinder and closely contacted with an upper and lower side of the crossing part(11) on a lateral side thereof. The pair of magnetic substances(20) have the same central axis as the crossing part(11). Magnets(30) are positioned on an upper side and a lower side of the substrate(10) and the magnetic substances(20) magnetizes them in a crossed direction. The microstrip route crossing part(11) has at lest three microwave routes(11a) in order to have at least two microwave output with one microwave input.
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