Patent ID: 11916274
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. An electromagnetic field band-stop filter, comprising a plurality of unit structures that have reflection characteristics on an electromagnetic wave of a predetermined frequency, wherein each of the plurality of unit structures includes: a plurality of electrode parts each of which is disposed along a side of a polygon in a non-contact manner with another electrode part; and a plurality of conductor parts which are provided for the plurality of electrode parts on a one-to-one basis and each of which has at least one bent portion between one end and an other end, the one ends of the plurality of conductor parts being connected to the electrode parts on a one-to-one basis and the other ends of the plurality of conductor parts being connected at one point on an inner side of the electrode parts in the individual unit structure, wherein the plurality of unit structures are regularly and two-dimensionally disposed by disposing electrode parts of the plurality of unit structures to be adjacent to each other with a spacing that reflects the predetermined frequency, wherein the bent portion of the conductor part has a shape forming an outline between one end and the other end of the conductor part, and wherein the electromagnetic field band-stop filter further includes a sub-resonator which has a ring shape corresponding to a shape of an outline formed by the bent portion of the conductor part and which is disposed in such a manner that at least a part of the ring shape two-dimensionally overlaps with at least a part of the bent portion of the conductor part so that, when a current flows through the ring shape, a direction of the current in at least a part of the ring shape becomes the same as, when a current flows through the conductor part, a direction of the current in at least a part of the bent portion of the conductor part.