Patent ID: 11921175
Assignee: CANON MEDICAL SYSTEMS CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 16:
17. An arrayed structure, comprising:
a cylindrical-shaped conductor layer; and
a cylindrical-shaped layer stack arranged on an inner periphery of the conductor layer and in which a plurality of frequency selective surfaces are arranged in layers and stacked, each of the frequency selective surfaces having a plurality of elements that are periodically arranged, wherein
each element of the plurality of elements is formed in such a manner that at least a portion of an edge of a particular element that faces an adjacent element in a same layer is closer to a center of the particular element than another portion of the edge, and
the elements are arranged in such a manner that, when an outer circumferential direction is viewed from a central axis of a cylinder formed of the layer stack, a part of an element formed in a first layer of the layer stack and a part of an element formed in a second layer of the layer stack overlap.