JPS5718101A - Local leakage coaxial cable - Google Patents

Local leakage coaxial cable

Info

Publication number
JPS5718101A
JPS5718101A JP9269380A JP9269380A JPS5718101A JP S5718101 A JPS5718101 A JP S5718101A JP 9269380 A JP9269380 A JP 9269380A JP 9269380 A JP9269380 A JP 9269380A JP S5718101 A JPS5718101 A JP S5718101A
Authority
JP
Japan
Prior art keywords
slot
radio wave
electric conductor
lambda
capacity
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.)
Granted
Application number
JP9269380A
Other languages
Japanese (ja)
Other versions
JPS6137806B2 (en
Inventor
Kenichiro Sadakane
Kazuhiko Kudo
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9269380A priority Critical patent/JPS5718101A/en
Publication of JPS5718101A publication Critical patent/JPS5718101A/en
Publication of JPS6137806B2 publication Critical patent/JPS6137806B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/203—Leaky coaxial lines

Abstract

PURPOSE:To output a signal by means of capacity coupling, by providing a slot on an external electric conductor for screening a radio wave, within the range where no radio wave leaks, and inserting a metallic plate between the slot part and a center electric conductor for propagating a radio wave. CONSTITUTION:When a slot 2 having width (d) and length (l) is provided on the diameter D of an external electric conductor, and wavelengh lambda is propagated, an aixal phase constant and a phase constant of meeting at right angle with said axial direction, on the surface becomes betaZ=(epsilon0Xmu0/LC)<1/2>, betat=(k<2>-epsilon0mu0/ LC)<1/2>, reepectively, (in the expression, L=pimu0D<2>/4, k=2pi/lambda). In case of D/lambda< 0.1, (betat/k)<2>>1, no radio wave leaks from the slot. When a metallic plate 33 is inserted between a center electic conductor 30 and an external electric conductor 31, capacity CM is formed. When size of a slot 32 is set to k<2>=epsilon0mu0/LC or so, and a switch 34 is closed, the whole capacity of the slot is increased by CM, becomes k<2>>epsilon0mu0/LC, and is shifted to a rsonance area. Accordingly, a radio wave is outputted freely by means of capacity coupling from the slot 32 by opening and closing the switch 34.
JP9269380A 1980-07-09 1980-07-09 Local leakage coaxial cable Granted JPS5718101A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9269380A JPS5718101A (en) 1980-07-09 1980-07-09 Local leakage coaxial cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9269380A JPS5718101A (en) 1980-07-09 1980-07-09 Local leakage coaxial cable

Publications (2)

Publication Number Publication Date
JPS5718101A true JPS5718101A (en) 1982-01-29
JPS6137806B2 JPS6137806B2 (en) 1986-08-26

Family

ID=14061569

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9269380A Granted JPS5718101A (en) 1980-07-09 1980-07-09 Local leakage coaxial cable

Country Status (1)

Country Link
JP (1) JPS5718101A (en)

Also Published As

Publication number Publication date
JPS6137806B2 (en) 1986-08-26

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