公开(公告)号：US11609267B2

公开(公告)日：2023-03-21

申请号：US17455580

申请日：2021-11-18

Applicant: Hitachi, Ltd.

Inventor： Isao Houda ,  Aya Ohmae ,  Umberto Paoletti

IPC: G01R31/309 ,  H05K1/02 ,  G01R1/067

Abstract: Provided is an immunity evaluation system that enables design feedback in consideration of a subject wiring and an improvement amount for improving an electromagnetic noise resistance of a circuit board. An immunity evaluation device includes: a storage unit configured to store characteristic data including probe-circuit board wiring coupling characteristics which are determined by a combination of a near-field probe and circuit board characteristics, and a test result; and an IC reaching signal level estimation unit configured to estimate a signal level reaching a terminal of an evaluation target IC. The immunity evaluation device receives board design information, information of the near-field probe, and test waveform instruction information of a signal applied to the near-field probe. The IC reaching signal level estimation unit reads the coupling characteristics from the storage unit based on the board design information of a test subject circuit board and the information of the near-field probe, and outputs a value of the IC reaching signal level reaching a terminal of the evaluation target IC from the board design information of the test subject circuit board, the information of the near-field probe, and the coupling characteristics.

公开(公告)号：US20140361787A1

公开(公告)日：2014-12-11

申请号：US14371637

申请日：2012-11-20

Applicant: Hitachi, Ltd.

Inventor： Umberto Paoletti

IPC: G01R31/02 ,  G01R23/20

CPC classification number: G01R31/02 ,  G01R23/20 ,  G01R29/0814 ,  G01R29/0821 ,  G01R31/002

Abstract: An apparatus and a method for measuring high frequency electromagnetic noise on the power supply planes of printed circuit boards (PCBs). The apparatus comprises a printed reverberation board (PRB) with curved edges that generates a strong sensitivity of the results to the boundary conditions. The PCB under test is inserted into a hole in the PRB and the power supply planes are connected to the PRB's first and second layer, in order to convey the noise into the device. Tuners are provided in to order obtain a statistically significant number of measurements with different boundary conditions. Measurement are conducted on the device ports. (See FIG. 1)

Abstract translation: 用于测量印刷电路板（PCB）电源平面上的高频电磁噪声的装置和方法。 该装置包括具有弯曲边缘的印刷混响板（PRB），其产生对边界条件的结果的强敏感度。 被测PCB被插入PRB的孔中，电源平面连接到PRB的第一和第二层，以将噪声传送到设备中。 提供调谐器以便获得具有不同边界条件的统计学显着数量的测量。 在设备端口上进行测量。 （参照图1）

公开(公告)号：US20140347230A1

公开(公告)日：2014-11-27

申请号：US14367123

申请日：2012-10-25

Applicant: Hitachi, Ltd.

Inventor： Aya Ohmae ,  Umberto Paoletti ,  Yasuo Yahagi

IPC: G01R29/08 ,  G01R29/10

CPC classification number: G01R29/0892 ,  G01R29/0814 ,  G01R29/10 ,  G01S3/04 ,  G01S3/046 ,  G01S3/30 ,  H01Q15/08 ,  H01Q19/062

Abstract: An electromagnetic wave visualizing system includes: an emission direction separation unit; a plurality of sensors, each detecting the energy of an electromagnetic wave emitted from the emission direction separation unit and outputting a sensing signal having strength corresponding to the detected energy; a processing unit capable of receiving the sensing signal from each of the sensors, the processing unit outputting a display signal when receiving the sensing signal from the sensor, the display signal containing information on the arrival direction of an electromagnetic wave with reference to a table based on position information on the sensor having transmitted the sensing signal; and a display unit capable of displaying the arrival directions of electromagnetic waves, the display unit displaying, when receiving the display signal, the arrival direction of an electromagnetic wave based on the electromagnetic wave arrival direction information obtained from the sensor position information contained in the display signal.

Abstract translation: 电磁波可视化系统包括：发射方向分离单元; 多个传感器，每个传感器检测从发射方向分离单元发射的电磁波的能量，并输出具有与检测能量相对应的强度的感测信号; 处理单元，其能够从每个传感器接收感测信号，所述处理单元在从所述传感器接收到所述感测信号时输出显示信号，所述显示信号包含关于基于表的电磁波的到达方向的信息 关于已经发送了感测信号的传感器上的位置信息; 以及显示单元，其能够显示电磁波的到达方向，所述显示单元基于从包含在所述显示器中的所述传感器位置信息获得的所述电磁波到达方向信息，在接收到所述显示信号时显示所述电磁波的到达方向 信号。

公开(公告)号：US09804215B2

公开(公告)日：2017-10-31

申请号：US15111288

申请日：2014-03-03

Applicant: Hitachi, Ltd.

Inventor： Aya Ohmae ,  Takashi Suga ,  Umberto Paoletti

IPC: G01R29/08

CPC classification number: G01R29/0885 ,  G01R29/08 ,  G01R29/0878

Abstract: The purpose of the present invention is to provide a small electromagnetic wave detection apparatus. This electromagnetic wave detection apparatus has: a planar Luneburg lens, which is covered with metal plates facing each other, and which changes the output direction of electromagnetic waves corresponding to the input direction of the electromagnetic waves; and an electric field sensor electrically connected to the metal plates. The electric field sensor detects the electromagnetic waves outputted from the Luneburg lens, and outputs a detection signal having an intensity corresponding to the direction in which the electromagnetic waves have traveled thereto, and the level of the energy of the electromagnetic waves thus detected.