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公开(公告)号：EP1191340A4
公开(公告)日：2008-08-20
申请号：EP01921903
申请日：2001-04-19
Applicant: ADVANTEST CORP , MINISTRY OF INTERNAL AFFAIRS A
Inventor： KITAYOSHI HITOSHI
CPC classification number: G01R29/0892 , G01R33/10
Abstract: A field distribution measuring method for measuring the spatial distribution of an electric field or a magnetic field by conducting a measurement at a plurality of sampling points while continuously scanning by a probe, wherein a sampling deviation amount is calculated based on a spurious vector generated due to a deviation between a probe position and a measuring timing and the distribution of an electrical field or a magnetic field is measured allowing for the deviation amount, whereby it is possible to properly remove a measuring noise generated by the deviation between a probe traveling position and a measuring timing.
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公开(公告)号：DE69528482T2
公开(公告)日：2003-07-10
申请号：DE69528482
申请日：1995-01-12
Applicant: ADVANTEST CORP
Inventor： KITAYOSHI HITOSHI
IPC: G01R29/08 , G01R31/312 , G01S7/02 , G01S7/06 , G01S7/20 , G01S7/295 , G01S13/86 , G01S13/87 , G01S13/89 , G01S15/89 , G01R23/163
Abstract: Non-contact type wave signal observation apparatus takes measurements of electromagnetic waves received on an observation plane and performs hologram reconstruction calculations to reconstruct characteristics of the corresponding electromagnetic wave information at points in the observed space. The invention provides apparatus for measuring transfer functions (and, if desired, waveforms) at any point on a network containing a transmission line having distributed properties and having internal signal sources - the processing takes into account fluctuations occurring in the electromagnetic radiation given off by the network. A display for displaying complex three-dimensional data such as interference data of electromagnetic waves may be used to display data produced by the apparatus according to the invention. The complex data is converted from orthogonal co-ordinates to polar co-ordinates, the phase information is converted to hue information in a hue converter and the amplitude information is used to modulate the brightness of the displayed signal; corresponding colour signals are displayed on a colour display unit.
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公开(公告)号：DE69528479T2
公开(公告)日：2003-05-15
申请号：DE69528479
申请日：1995-01-12
Applicant: ADVANTEST CORP
Inventor： KITAYOSHI HITOSHI
IPC: G01R29/08 , G01R31/312 , G01S7/02 , G01S7/06 , G01S7/20 , G01S7/295 , G01S13/86 , G01S13/87 , G01S13/89 , G01S15/89 , G01R23/163
Abstract: Non-contact type wave signal observation apparatus takes measurements of electromagnetic waves received on an observation plane and performs hologram reconstruction calculations to reconstruct characteristics of the corresponding electromagnetic wave information at points in the observed space. The invention provides apparatus for measuring transfer functions (and, if desired, waveforms) at any point on a network containing a transmission line having distributed properties and having internal signal sources - the processing takes into account fluctuations occurring in the electromagnetic radiation given off by the network. A display for displaying complex three-dimensional data such as interference data of electromagnetic waves may be used to display data produced by the apparatus according to the invention. The complex data is converted from orthogonal co-ordinates to polar co-ordinates, the phase information is converted to hue information in a hue converter and the amplitude information is used to modulate the brightness of the displayed signal; corresponding colour signals are displayed on a colour display unit.
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公开(公告)号：GB2318941B
公开(公告)日：1999-04-21
申请号：GB9721153
申请日：1997-10-06
Applicant: ADVANTEST CORP
Inventor： KITAYOSHI HITOSHI
Abstract: The reconstruction region of a hologram reconstructed image is segmented. A fast Fourier transform (FFT) is carried out after multiplying the hologram measurement data V(R) by a weighting function. A fast Fourier transform (FFT) is carried out after multiplying the antenna sensitivity inverse matrix A-1(R'a,b) for each segment by inverse propagation function r'a,bexp(j2 pi r'a,b/ lambda ) to find B-1a,b(s, t), and then multiplying this by a weighting function. After the two FFT outputs are multiplied by each other, inverse fast Fourier transform (IFFT) is carried out. Compensation is performed for the weighting function and the output is made the segment reconstructed image. In addition, radio hologram observation is carried out at two scan surfaces, a horizontal polarization antenna and a vertical polarization antenna are placed at each scan surface, and the voltage vector distribution received by the antennas is stored. The sizes of the error of the reception antenna sensitivity matrix of the vertical polarization reception antenna and the error of the reception antenna sensitivity matrix of the horizontal polarization reception antenna are found, and the received voltage vectors and reception antenna sensitivity inverse matrices are selectively used to find and visualize the three wavesource current vector components.
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公开(公告)号：DE19649215A1
公开(公告)日：1997-06-12
申请号：DE19649215
申请日：1996-11-27
Applicant: ADVANTEST CORP
Inventor： KITAYOSHI HITOSHI
Abstract: The antenna has a coaxial cable 12 and a half-wavelength dipole antenna member 13 connected to the end of the coaxial cable. Slits 14 extend along the outer conductor of the cable for a distance of * small Greek lambda */4, thereby splitting the outer conductor into two leafs. One element 13a of the antenna is connected at its base side to the centre conductor 12c of the cable and to the end of one leaf 12a of said outer conductor, and the other element 13b of the antenna is connected at its base side to the end of the other leaf 12b of the outer conductor. A reflector 11 orthogonal to the cable may be provided at a position of * small Greek lambda */4 from the end of the cable. Two or more antennae may be mounted on the reflector (fig. 12) and the dipole elements may be bow-tie shaped (fig. 10). If a reflector is not used absorbent material may be placed around the cable (16, fig. 11). The antenna is suitable for measuring electromagnetic field distribution in the microwave band.
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Patent Agency Ranking
公开(公告)号：DE19680108T1
公开(公告)日：1997-05-22
申请号：DE19680108
申请日：1996-01-23
Applicant: ADVANTEST CORP
Inventor： KITAYOSHI HITOSHI
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公开(公告)号：DE19921947B4
公开(公告)日：2005-12-22
申请号：DE19921947
申请日：1999-05-12
Applicant: ADVANTEST CORP
Inventor： KITAYOSHI HITOSHI
Abstract: A method for visualizing radio waves which can only one sensor station to accurately specify the positions of a plurality of radio wave sources operating in the same frequency band and which can monitor a state of utilization of the radio waves. In a sensor station performing a radio wave hologram observation, one or more scanning antennas for scanning along a predetermined path and a plurality of fixed antennas having different directions and positions are provided. A signal received at the scanning antenna interferes with another signal received at the fixed antenna for each fixed antenna while the scanning antenna scans along the predetermined path, thereby obtaining a complex scanning data matrix for which complex weighting and addition processing is performed so that distribution of the radio wave sources is reconstructed.
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公开(公告)号：DE69528482D1
公开(公告)日：2002-11-07
申请号：DE69528482
申请日：1995-01-12
Applicant: ADVANTEST CORP
Inventor： KITAYOSHI HITOSHI
IPC: G01R29/08 , G01R31/312 , G01S7/02 , G01S7/06 , G01S7/20 , G01S7/295 , G01S13/86 , G01S13/87 , G01S13/89 , G01S15/89 , G01R23/163
Abstract: Non-contact type wave signal observation apparatus takes measurements of electromagnetic waves received on an observation plane and performs hologram reconstruction calculations to reconstruct characteristics of the corresponding electromagnetic wave information at points in the observed space. The invention provides apparatus for measuring transfer functions (and, if desired, waveforms) at any point on a network containing a transmission line having distributed properties and having internal signal sources - the processing takes into account fluctuations occurring in the electromagnetic radiation given off by the network. A display for displaying complex three-dimensional data such as interference data of electromagnetic waves may be used to display data produced by the apparatus according to the invention. The complex data is converted from orthogonal co-ordinates to polar co-ordinates, the phase information is converted to hue information in a hue converter and the amplitude information is used to modulate the brightness of the displayed signal; corresponding colour signals are displayed on a colour display unit.
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公开(公告)号：GB2326787B
公开(公告)日：1999-04-21
申请号：GB9820450
申请日：1997-10-06
Applicant: ADVANTEST CORP
Inventor： KITAYOSHI HITOSHI
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公开(公告)号：DE19838052A1
公开(公告)日：1999-03-18
申请号：DE19838052
申请日：1998-08-21
Applicant: ADVANTEST CORP
Inventor： KITAYOSHI HITOSHI
Abstract: Observation comprises measuring the radiation from a measurement object to reconstruct a hologram. A circle's circumference is detected by a first sensor and the radiation wave is simultaneously received by the sensor to generate a first reception signal. A radiation wave is received by a second sensor at a position to produce a second received signal. The received signals are superimposed. The superimposition signal is detected to yield measurement data at each point on the circle's circumference.
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