US 11,916,274 B2
Electromagnetic field band-stop filter
Go Itami, Musashino (JP); Yohei Toriumi, Musashino (JP); Ken Okamoto, Musashino (JP); and Jun Kato, Musashino (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 16/971,728
Filed by NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
PCT Filed Feb. 21, 2019, PCT No. PCT/JP2019/006605
§ 371(c)(1), (2) Date Aug. 21, 2020,
PCT Pub. No. WO2019/163910, PCT Pub. Date Aug. 29, 2019.
Claims priority of application No. 2018-032270 (JP), filed on Feb. 26, 2018.
Prior Publication US 2020/0395646 A1, Dec. 17, 2020
Int. Cl. H01P 1/20 (2006.01); H01Q 1/52 (2006.01); H01Q 15/00 (2006.01)
CPC H01P 1/20 (2013.01) [H01Q 1/526 (2013.01); H01Q 15/0013 (2013.01)] 6 Claims
OG exemplary drawing
 
1. 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 plurality of electrode parts each of which has a flat-plate portion and is disposed in such a manner that a long side of the flat-plate portion is disposed along a side of the polygon, 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, wherein the electromagnetic field band-stop filter further includes a first sub-resonator forming a conductive plate that is disposed overlapping at least a part of the flat-plate portion of each of the adjacent electrode parts with a predetermined spacing therebetween and that adds electrical capacitance in parallel to electrical capacitance which the adjacent electrode parts have, and wherein the electromagnetic field band-stop filter further includes a second 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.