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

Claim 2:
3. The edge extraction method of claim 2, wherein:
emitting the electromagnetic wave comprises:
emitting, toward the object, a first electromagnetic wave polarized only in a first direction perpendicular to the propagation direction; and
emitting, toward the object, a second electromagnetic wave polarized only in a second direction orthogonal to the propagation direction and the first direction;

receiving the transmitted electromagnetic wave comprises:
receiving a first transmitted electromagnetic wave that is the first electromagnetic wave that has been transmitted through the object, using the receiving antenna in the first state and the receiving antenna in the second state; and
receiving a second transmitted electromagnetic wave that is the second electromagnetic wave that has been transmitted through the object, using the receiving antenna in the first state and the receiving antenna in the second 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 first transmitted electromagnetic wave received by the receiving antenna in the first state and a second intensity of the first transmitted electromagnetic wave received by the receiving antenna in the second state; and
calculating the intensity in the propagation direction of the transmitted electromagnetic wave based on a ratio between a first intensity of the second transmitted electromagnetic wave received by the receiving antenna in the first state and a second intensity of the second transmitted electromagnetic wave received by the receiving antenna in the second state.