Title:
NARROW DIRECTIVITY ELECTROMAGNETIC FIELD ANTENNA PROBE, ELECTROMAGNETIC FIELD MEASURING APPARATUS USING THE SAME, AND CURRENT DISTRIBUTION EXPLORATION APPARATUSOR OR ELECTRICAL WIRING DIAGNOSTIC DEVICE
Document Type and Number:
Japanese Patent JP3760908
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a probe which measures electromagnetic field in the vicinity of an electronic device for high frequency operation, an information processing terminal, a communication device, a semiconductor, a circuit board, etc. or is used for irradiating them with electromagnetic wave.
SOLUTION: To the conventional monopole antenna or loop antenna, a monopole antenna or a loop antenna which generates an electromagnetic field having reverse phase to the conventional antennas is arranged so as to cancel components other than a desired direction component of the probe. By combining them, a region of detection position or irradiation position is three-dimensionally narrowed. Generating position of electromagnetic wave generated by the electronic device can be specified precisely. In an apparatus which irradiates the electronic device with electromagnetic wave and tests the device, a region irradiated with electromagnetic wave is narrowed, so that position precision can be improved.
Inventors:
Koichi Uesaka
Makuuchi Masami
Kenichi Shinbo
Makuuchi Masami
Kenichi Shinbo
Application Number:
JP2002315229A
Publication Date:
March 29, 2006
Filing Date:
October 30, 2002
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
G01R29/08; H01Q7/00; G01R33/10; H01Q9/04; (IPC1-7): G01R29/08; G01R33/10; H01Q7/00
Domestic Patent References:
| JP2001228227A | ||||
| JP10311857A |
Attorney, Agent or Firm:
Yasuo Sakuta
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