Patent ID: 11879718
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 6:
7. The edge extraction apparatus of claim 5, wherein:
the receiving antenna comprises a first receiving antenna and a second receiving antenna, wherein the first receiving antenna has a polarization plane that is parallel to an axis orthogonal to the propagation direction and a direction of polarization of an electromagnetic wave incident on the object and forms a sharp angle with the propagation direction, wherein the second receiving antenna has a polarization plane that is parallel to the axis orthogonal to the propagation direction and the direction of polarization of the electromagnetic wave incident on the object and is orthogonal to the polarization plane of the first receiving antenna; and
the calculator is further configured to calculate the intensity in the propagation direction of the transmitted electromagnetic wave based on a ratio between a first intensity of the transmitted electromagnetic wave received by the first receiving antenna and a second intensity of the transmitted electromagnetic wave received by the second receiving antenna.