发明名称 |
METHOD OF AND DEVICE FOR GENERATING UNIFORM ELECTROMAGNETIC FIELD IN ARTICLE FINDING SYSTEM |
摘要 |
An electromagnetic article detection system of the type wherein a target having frequency selective electrical characteristics produces predetermined electromagnetic effects in response to an alternating electromagnetic field. A large resonant electric circuit is placed across an interrogation zone from an interrogation antenna and is inductively coupled to the interrogation antenna to generate secondary electromagnetic waves which cooperate with the primary electromagnetic waves from the interrogation antenna to provide improved distribution of electromagnetic field strength in the interrogation zone. |
申请公布号 |
JPS5412288(A) |
申请公布日期 |
1979.01.29 |
申请号 |
JP19780054899 |
申请日期 |
1978.05.09 |
申请人 |
KNOGO CORP |
发明人 |
YUUJIN BII NOBUIKOFU |
分类号 |
G08B21/00;G01V3/00;G01V3/10;G01V15/00;G08B13/24;G08B21/24 |
主分类号 |
G08B21/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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