US1927880A - Signaling - Google Patents

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Publication number
US1927880A
US1927880A US399718A US39971829A US1927880A US 1927880 A US1927880 A US 1927880A US 399718 A US399718 A US 399718A US 39971829 A US39971829 A US 39971829A US 1927880 A US1927880 A US 1927880A
Authority
US
United States
Prior art keywords
aerial
transmitting
reflector
directions
radiation
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.)
Expired - Lifetime
Application number
US399718A
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English (en)
Inventor
Strutt Maximiliaan Julius Otto
Dijksterhuis Popko Reinder
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.)
RCA Corp
Original Assignee
RCA 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 RCA Corp filed Critical RCA Corp
Application granted granted Critical
Publication of US1927880A publication Critical patent/US1927880A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station

Definitions

  • the invention relates to a method and means for transmitting wireless signals and more particularly wherein directional radiation and aerial systems are used.
  • the insight obtained by the above mentioned experiments is made subservient to the solution of the problem of eliminating or at any rate reducing the known and dreaded fading eifect.
  • the fading effect is a phenomenon which occurs irregularly at a receiving station and which probably depends on the path which the incident electromagnetic oscillations have followed in space. If the radiated oscillations reach the receiving station along two different paths, it is less probable that the reception from two directions is troubled by fading. It is possible therefore to ensure a reception which is not troubled by fading by arranging some distance apart from each other two aerials which are controlled by the same transmitting installation.
  • Figure 2 represents an aerial of suitable shape adapted for use in the mode of realization according to the invention.
  • Figure 1 shows two aerials 1 and 2 which are In order to prevent radiation in of the axis of the parabolic cylinder,'an aerial the direction is used whose directional effect is normal to the longitudinal direction of the said axis.
  • an aerial having a shape as represented in Figure 2 which shows an aerial with which'a directional effect normal to the longitudinal direction of the aerial is ensured owing to the fact that the radiation of the'suce cessive half -wave lengths are alternately utilized and suppressed.
  • aerials which are each provided with a reflector.
  • a reflector is not essential for the invention but is desirable for long distance transmission in which otherwise the radiation in opposite directions around the globe would cause a disturbing effect at the receiving station.
  • a radio transmitting antenna system having, in combination, a horizontal dipole antenna, a parabolic reflector for said dipole arranged to directively propagate the energy radiated from said dipole upwardly in a directionforming a predetermined angle with the horizontal plane, a second dipole antenna spaced away from said first dipole, and a parabolic reflector for said second dipole antenna arranged to directively propagate the energy radiated from said second antenna upwardly in a direction forming a second predetermined angle with the horizontal plane, both said dipole antennae being arranged to directively and simultaneously propagate energy in the same vertical plane, but in different directions, the angles said directions form with the horizontal plane being chosen in such manner that for both directions reception is a maximum.
  • MAXIMILIAAN JULIUS o'r'ro STRU'IT MAXIMILIAAN JULIUS o'r'ro STRU'IT.
  • POPKO REINDER DIJKSTERHUIS POPKO REINDER DIJKSTERHUIS.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Radio Relay Systems (AREA)
US399718A 1928-10-31 1929-10-15 Signaling Expired - Lifetime US1927880A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1927880X 1928-10-31

Publications (1)

Publication Number Publication Date
US1927880A true US1927880A (en) 1933-09-26

Family

ID=19873315

Family Applications (1)

Application Number Title Priority Date Filing Date
US399718A Expired - Lifetime US1927880A (en) 1928-10-31 1929-10-15 Signaling

Country Status (2)

Country Link
US (1) US1927880A (enrdf_load_stackoverflow)
BE (1) BE363733A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
BE363733A (enrdf_load_stackoverflow)

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