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

Claim 0:
1. 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,
the center of each element is a central point of the element, and
the edge is a straight line or an arc connecting two vertices of the element, and the edge is formed in such a manner that a central portion is concave toward the central point and a portion other than the central portion maintains the straight line or the arc.