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

Claim 1:
2. The edge extraction method of claim 1, wherein:
receiving the transmitted electromagnetic wave comprises:
receiving the transmitted electromagnetic wave using the receiving antenna that is in a first state where a polarization plane of the receiving antenna 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; and
receiving the transmitted electromagnetic wave using the receiving antenna that is in a second state where the polarization plane of the receiving antenna 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 receiving antenna in the first state; and

calculating the intensity in the propagation direction of the transmitted electromagnetic wave comprises:
calculating 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 receiving antenna in the first state and a second intensity of the transmitted electromagnetic wave received by the receiving antenna in the second state.