Patent ID: 11913982
Assignee: FUJITSU LIMITED
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 3:
4. A computerized method for a radiated electromagnetic wave estimation causing a computer to execute a process comprising:
converting a circuit diagram of an electronic circuit board into a combination of a plurality of partial circuits; and
predicting, with a machine learning model, radiated electromagnetic waves from the electronic circuit board by using a prediction result of a radiated electromagnetic wave for each of the partial circuits obtained by the converting, wherein
in the predicting, the radiated electromagnetic waves from the electronic circuit board is predicted by obtaining a maximum value, for each frequency, in a plurality of the prediction results of the radiated electromagnetic waves for the partial circuits,
the predicting is performed on an excitation circuit in the circuit diagram of the electronic circuit board, the excitation circuit being coupled to an excitation source, and
the process further comprising:
simplifying a shape of the excitation circuit to generate a simplified excitation circuit having end points and branch points, and extracting, from the simplified excitation circuit, a partial circuit having two end points and at least one branch point between the two end points; and
training the machine learning model with training data of the simplified shape, wherein in the simplifying, wherein
the simplified excitation circuit is generated by projecting a schematic shape of the excitation circuit over a grid in which a plurality of square cells are arranged, and coupling points extracted based on intersections between the schematic shape and the square cells, and
wherein the process further comprises:
extracting a median line from each of a plurality of circuit portions included in the excitation circuit; and
generating the schematic shape of the excitation circuit by repeatedly performing processing of coupling to a first median line among a plurality of the median lines extracted, an end portion of a second median line closest to the first median line via a coupling straight line, and processing of making the coupling straight line and the second median line included in the first median line.