Patent ID: 11921055
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A surface change detection body disposed on a surface of an object and configured to detect a change in the surface, the surface change detection body comprising:
a sensor unit configured to resonate with a high-frequency signal;
a signal propagation unit configured to propagate the high-frequency signal to the sensor unit; and
an incidence and reflection unit configured to receive the high-frequency signal from an outside and output a reflected high-frequency signal reflected from the sensor unit to the outside;
wherein the sensor unit is a parallel plate resonator in which a dielectric is interposed; and
wherein the incidence and reflection unit is an antenna having a length which is an integral multiple of one fourth of an effective wavelength of a resonance frequency of the parallel plate resonator.