JPS6450975A - Squid fluxmeter - Google Patents
Squid fluxmeterInfo
- Publication number
- JPS6450975A JPS6450975A JP20630787A JP20630787A JPS6450975A JP S6450975 A JPS6450975 A JP S6450975A JP 20630787 A JP20630787 A JP 20630787A JP 20630787 A JP20630787 A JP 20630787A JP S6450975 A JPS6450975 A JP S6450975A
- Authority
- JP
- Japan
- Prior art keywords
- squid
- aggregate
- amplifier
- impedance
- squids
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Measuring Magnetic Variables (AREA)
Abstract
PURPOSE:To enhance the S/N ratio, to simplify an apparatus and to facilitate operation, by connecting a plurality of superconducting quantum interference devices (SQUID) in series, in parallel or in a combination of both of them. CONSTITUTION:A plurality of SQUIDs 3 are used as signal detecting elements, and the number of them and the arrangement thereof are selected so that the impedance of the whole of them becomes as follows to arrange them in series, in parallel or in a combination of both of them. That is, when the output impedance of the aggregate 6 of SQUIDs is selected and the SQUID aggregate 6 can be directly connected to an amplifier 5, selection is performed so as to minimize the noise index of the amplifier 5 and, when the SQUID aggregate 6 is connected to the amplifier 5 by a cable, selection is performed so as to take SQUID collation. Since the output impedance of the whole becomes a value optimum to the amplifier 5 of the next stage, the SQUID aggregate 6 itself is also used as an impedance transformer circuit. By this constitution, an S/N ratio is enhanced and an apparatus can be simplified and operation can be facilitated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20630787A JPS6450975A (en) | 1987-08-21 | 1987-08-21 | Squid fluxmeter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20630787A JPS6450975A (en) | 1987-08-21 | 1987-08-21 | Squid fluxmeter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6450975A true JPS6450975A (en) | 1989-02-27 |
Family
ID=16521133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20630787A Pending JPS6450975A (en) | 1987-08-21 | 1987-08-21 | Squid fluxmeter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6450975A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5194807A (en) * | 1990-09-07 | 1993-03-16 | Daikin Industries, Ltd. | Method and apparatus for compensating for variations in magnetic flux supplied to a squid superconducting loop input coil by applying a modulated signal to a modulation coil thereof |
US5600242A (en) * | 1994-09-26 | 1997-02-04 | The Boeing Company | Electrically small broadband high linear dynamic range deceiver including a plurality of active antenna elements |
US5844407A (en) * | 1994-09-26 | 1998-12-01 | The Boeing Company | Method using squid array for improving the sensitivity of a slot antenna |
US5933001A (en) * | 1994-09-26 | 1999-08-03 | The Boeing Company | Method for using a wideband, high linear dynamic range sensor |
-
1987
- 1987-08-21 JP JP20630787A patent/JPS6450975A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5194807A (en) * | 1990-09-07 | 1993-03-16 | Daikin Industries, Ltd. | Method and apparatus for compensating for variations in magnetic flux supplied to a squid superconducting loop input coil by applying a modulated signal to a modulation coil thereof |
US5600242A (en) * | 1994-09-26 | 1997-02-04 | The Boeing Company | Electrically small broadband high linear dynamic range deceiver including a plurality of active antenna elements |
US5844407A (en) * | 1994-09-26 | 1998-12-01 | The Boeing Company | Method using squid array for improving the sensitivity of a slot antenna |
US5933001A (en) * | 1994-09-26 | 1999-08-03 | The Boeing Company | Method for using a wideband, high linear dynamic range sensor |
US5994891A (en) * | 1994-09-26 | 1999-11-30 | The Boeing Company | Electrically small, wideband, high dynamic range antenna having a serial array of optical modulators |
US6005380A (en) * | 1994-09-26 | 1999-12-21 | The Boeing Company | Sensitive slot antenna including inductively coupled squid array |
US6362617B1 (en) * | 1994-09-26 | 2002-03-26 | The Boeing Company | Wideband, high dynamic range antenna |
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