公开(公告)号：EP0547228A4

公开(公告)日：1994-07-13

申请号：EP92910579

申请日：1992-05-26

Applicant: ADVANTEST CORP

Inventor： HIROSE MASAAKI ,  KATOH KAZUO ,  UEKI YUTAKA ,  HIRAKOSO YOHEI ,  SATOH MITSUNORI ,  KOSUGE TAKASHI

IPC: G01R19/00 ,  G01R29/08 ,  G01R29/26

CPC classification number: G01R19/003 ,  G01R29/0892 ,  G01R29/26

公开(公告)号：DE69228232T2

公开(公告)日：1999-07-08

申请号：DE69228232

申请日：1992-05-26

Applicant: ADVANTEST CORP

Inventor： HIROSE MASAAKI ,  KATOH KAZUO ,  UEKI YUTAKA ,  HIRAKOSO YOHEI ,  SATOH MITSUNORI ,  KOSUGE TAKASHI

IPC: G01R19/00 ,  G01R29/08 ,  G01R29/26

Abstract: An apparatus for measuring the intensity of an interfering electromagnetic wave, specifically for measuring the average value of impulsive noises in a short time accurately. In the apparatus, impulsive noises, inputted through a variable attenuator (12), a frequency converter (13), an intermediate-frequency amplifier (15), a band-pass filter (16) of 9 KHz or 120 KHz are inputted into a linear detector (17). The detected outputs are passed through a low-pass CR filter (31) whose cut-off frequency is tens of thousands of hertz to lower their peak values and to widen their width. The output of the filter is converted into digital signal by an A/D converter (33), and digital values at respective sampling points in one frame of the digital signals are summed by a computing circuit (34). Then, the summation value thereof is divided by the number of samples to obtain the average value and the result is displayed.

公开(公告)号：DE69228232D1

公开(公告)日：1999-03-04

申请号：DE69228232

申请日：1992-05-26

Applicant: ADVANTEST CORP

Inventor： HIROSE MASAAKI ,  KATOH KAZUO ,  UEKI YUTAKA ,  HIRAKOSO YOHEI ,  SATOH MITSUNORI ,  KOSUGE TAKASHI

IPC: G01R19/00 ,  G01R29/08 ,  G01R29/26

Abstract: An apparatus for measuring the intensity of an interfering electromagnetic wave, specifically for measuring the average value of impulsive noises in a short time accurately. In the apparatus, impulsive noises, inputted through a variable attenuator (12), a frequency converter (13), an intermediate-frequency amplifier (15), a band-pass filter (16) of 9 KHz or 120 KHz are inputted into a linear detector (17). The detected outputs are passed through a low-pass CR filter (31) whose cut-off frequency is tens of thousands of hertz to lower their peak values and to widen their width. The output of the filter is converted into digital signal by an A/D converter (33), and digital values at respective sampling points in one frame of the digital signals are summed by a computing circuit (34). Then, the summation value thereof is divided by the number of samples to obtain the average value and the result is displayed.

公开(公告)号：JPH04353774A

公开(公告)日：1992-12-08

申请号：JP12936291

申请日：1991-05-31

Applicant: ADVANTEST CORP

Inventor： HIROSE MASAAKI

IPC: G01R29/10

Abstract: PURPOSE:To obtain a TEM cell which generates inside a uniform TEM mode electromagnetic wave being simular to the one of a distant field. CONSTITUTION:A cell 1 constituting an external electrode is provided, and an internal electrode plate which is supported at the upper and lower end parts by support members 7 and 7' provided in the vertical direction and stands upright in the vertical direction is provided inside the cell. The internal electrode plate 5 is provided in displacement from the central position of the cell in regard to the direction being orthogonal to the surface of the plate, and the cell 1 constituting the external electrode has doors 4 on the opposite sides of the internal electrode plate 5. In this way, a TEM cell showing little deflection, in particular, is constructed.

公开(公告)号：JPS6222481B2

公开(公告)日：1987-05-18

申请号：JP17549480

申请日：1980-12-12

Applicant: ADVANTEST CORP

Inventor： HIROSE MASAAKI

IPC: H01P1/218 ,  H01P1/36 ,  H01P7/00 ,  H03J3/16 ,  H03J3/18

公开(公告)号：JPS624011B2

公开(公告)日：1987-01-28

申请号：JP17820780

申请日：1980-12-17

Applicant: ADVANTEST CORP

Inventor： HIROSE MASAAKI

IPC: H03J3/06 ,  H01P1/218 ,  H03J3/16 ,  H03J3/18

公开(公告)号：JPH04350575A

公开(公告)日：1992-12-04

申请号：JP12143691

申请日：1991-05-27

Applicant: ADVANTEST CORP

Inventor： HIROSE MASAAKI

IPC: G01R29/08 ,  G01R29/26

Abstract: PURPOSE:To accurately calculate the mean value of extremely fine impulsive noise at a high speed. CONSTITUTION:In an apparatus for measuring and displaying the mean value of impulsive noise, a low-pass filter 10 is connected next to a linear detector 5 to make the difference between a pulse peak value and a mean value extremely small. An analogue/digital converter 11 is connected next to the low-pass filter 10 and digitalized low-pass filter output is subjected to high speed operational processing by the operation circuit 12 further connected next to the converter to calculate a mean value.