JPS5219910A - Wiresless communication method between the underground and the ground - Google Patents

Wiresless communication method between the underground and the ground

Info

Publication number
JPS5219910A
JPS5219910A JP50095609A JP9560975A JPS5219910A JP S5219910 A JPS5219910 A JP S5219910A JP 50095609 A JP50095609 A JP 50095609A JP 9560975 A JP9560975 A JP 9560975A JP S5219910 A JPS5219910 A JP S5219910A
Authority
JP
Japan
Prior art keywords
communication method
ground
underground
wiresless
ditch
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
JP50095609A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5431926B2 (OSRAM
Inventor
Osamu Abe
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP50095609A priority Critical patent/JPS5219910A/ja
Publication of JPS5219910A publication Critical patent/JPS5219910A/ja
Publication of JPS5431926B2 publication Critical patent/JPS5431926B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)
  • Radio Transmission System (AREA)
JP50095609A 1975-08-06 1975-08-06 Wiresless communication method between the underground and the ground Granted JPS5219910A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50095609A JPS5219910A (en) 1975-08-06 1975-08-06 Wiresless communication method between the underground and the ground

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50095609A JPS5219910A (en) 1975-08-06 1975-08-06 Wiresless communication method between the underground and the ground

Publications (2)

Publication Number Publication Date
JPS5219910A true JPS5219910A (en) 1977-02-15
JPS5431926B2 JPS5431926B2 (OSRAM) 1979-10-11

Family

ID=14142281

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50095609A Granted JPS5219910A (en) 1975-08-06 1975-08-06 Wiresless communication method between the underground and the ground

Country Status (1)

Country Link
JP (1) JPS5219910A (OSRAM)

Also Published As

Publication number Publication date
JPS5431926B2 (OSRAM) 1979-10-11

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