JPS5616854A - Pulse transmission unit - Google Patents

Pulse transmission unit

Info

Publication number
JPS5616854A
JPS5616854A JP9215679A JP9215679A JPS5616854A JP S5616854 A JPS5616854 A JP S5616854A JP 9215679 A JP9215679 A JP 9215679A JP 9215679 A JP9215679 A JP 9215679A JP S5616854 A JPS5616854 A JP S5616854A
Authority
JP
Japan
Prior art keywords
high frequency
load
pulse
amplitude
coaxial line
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
Application number
JP9215679A
Other languages
Japanese (ja)
Inventor
Shozo Shimizu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jeol Ltd
Original Assignee
Jeol Ltd
Nihon Denshi KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jeol Ltd, Nihon Denshi KK filed Critical Jeol Ltd
Priority to JP9215679A priority Critical patent/JPS5616854A/en
Publication of JPS5616854A publication Critical patent/JPS5616854A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
    • G01R33/36—Electrical details, e.g. matching or coupling of the coil to the receiver
    • G01R33/3628—Tuning/matching of the transmit/receive coil
    • G01R33/3635—Multi-frequency operation

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

PURPOSE:To make it possible to supply two high frequencies to an irradiation coil without a magnetic core, by connecting the output of the first high frequency source to a load directly and by connecting the output of the second high frequency source and the load through a coaxial line. CONSTITUTION:This unit transmits large-amplitude high-frequency pulse A from high frequency generator 6 and small-amplitude high-frequency pulse B from high frequency generator 7 to a load, and coaxial line 8 has the length of the approximate quarter of the wave length of high frequency A, and the output of high frequency generator 7 is grounded through the circuit where diodes are connected in antiparallel. When circuit 9 is turned on during generation of large-amplitude pulse A, coaxial line 8 has an infinite impedance to supply large-amplitude pulse A to the load without loss. Meanwhile, during no generation of large-amplitude pulse A, small-amplitude pulse B is supplied to the load through coaxial line 8 because circuit 9 is held in the turning-off state.
JP9215679A 1979-07-20 1979-07-20 Pulse transmission unit Pending JPS5616854A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9215679A JPS5616854A (en) 1979-07-20 1979-07-20 Pulse transmission unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9215679A JPS5616854A (en) 1979-07-20 1979-07-20 Pulse transmission unit

Publications (1)

Publication Number Publication Date
JPS5616854A true JPS5616854A (en) 1981-02-18

Family

ID=14046554

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9215679A Pending JPS5616854A (en) 1979-07-20 1979-07-20 Pulse transmission unit

Country Status (1)

Country Link
JP (1) JPS5616854A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0170514A2 (en) * 1984-07-31 1986-02-05 Oxford Research Systems Limited Method and apparatus for obtaining N.M.R. spectra and coils for use therein
US4634980A (en) * 1984-08-16 1987-01-06 Picker International, Inc. Nuclear magnetic resonance radio frequency antenna

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0170514A2 (en) * 1984-07-31 1986-02-05 Oxford Research Systems Limited Method and apparatus for obtaining N.M.R. spectra and coils for use therein
US4634980A (en) * 1984-08-16 1987-01-06 Picker International, Inc. Nuclear magnetic resonance radio frequency antenna

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