US1904174A - Arrangement for transmitting wireless signals - Google Patents

Arrangement for transmitting wireless signals Download PDF

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Publication number
US1904174A
US1904174A US390526A US39052629A US1904174A US 1904174 A US1904174 A US 1904174A US 390526 A US390526 A US 390526A US 39052629 A US39052629 A US 39052629A US 1904174 A US1904174 A US 1904174A
Authority
US
United States
Prior art keywords
arrangement
wireless signals
transmitting wireless
radiators
aerial
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
US390526A
Other languages
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 US1904174A publication Critical patent/US1904174A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
    • H01Q21/12—Parallel arrangements of substantially straight elongated conductive units

Definitions

  • This invention relates to antennae or aerials adapted to transmit wireless signals and more particularly to those having a directional efiect.
  • This invention has for its object a process and an arrangement for varying at will the direction in which the signals are transmitted.
  • Aerial systems have been already proposed, in which'the radiation in particular directions can be amplified or attenuated by using at least three aerials which, dependent upon the direction desired, can be energized in variable, mutually different phases. With these systems rather complicated devices for controlling the relative phase are required.
  • a process for varying thejdirection is carried out, in which a beam of electro-magnetic waves is radiated by a directional aerial system whose feeding is efl'ected in such manner that the amplitude of the oscillations in the variousradiators of the: system regulably increases or decreases from one side to the other, the phases in the said radiators being, however, maintained mutually equal.
  • an aerial constituted by a transmission line and two or more radiators which together with the said transmission line are located in a plane while the supply of the radia ors can be efi'ected at will with mutual difference of amplitude at one or more points of the transmission line.
  • an aerial 1 consists of atranslnission line constituted by two horizontal conductors or feeders 2 which are located the one above the other a half Wavelength apart and between whichare arranged at distances of a half-wavelength a plurality of radiators 3 having free electrical ends and each having a length of a half wave-length.
  • the transmission line On both sid s the transmission line is closed by a conductor 1 which, electrically speaking, is made twice as long as a half wave-length by means of a coil 5, the feeding being effected on both sides at one of these halt wave-lengths by means of transformers 6.
  • These tran formers are supplied by leads 7 from an autotransformer 8, which is coupled to the transmitter by means of leads 9.
  • Variable inductances 10 are inserted in the two feeders in order to equalize the phase of the currents passings through the said feeders.
  • each of the conductors 4- are in the same phase and the radiators 3 are connected at distances of half a wave-length alternately to the upper and the lower conductor 2, it may be obtained that all the radiators are energized in the same phase, so that a directional radiation is produced whose main direction under normal conditions is perpendicular to the plane of the aerial.
  • Figure 3 represents an aerial system which is fed only on one side.
  • the desired variation of amplitude in the successive radiators is obtained owing to the fact that in each of the conductors 2 between the successive points of connection of each two radiators are connected in series, a variable resistance 12 and a variable inductance 13, the latter being destined for the phasecorrection.
  • the directive efl'ect can onl be influenced at the cost of extra energyowes in the transmission line; such losses are obviated by havin 5 the u efiectgdfi two or ngorepoints themiam.
  • antenna systemeom pris' a transv- "line, eletrially open e iified radidimxdupied'fliereto, an autmtrapsformer w g with highir'equen current, and M flrem lhzg" each end 0 the transmisfitheanw tmnsformler.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
US390526A 1928-09-01 1929-09-05 Arrangement for transmitting wireless signals Expired - Lifetime US1904174A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1904174X 1928-09-01

Publications (1)

Publication Number Publication Date
US1904174A true US1904174A (en) 1933-04-18

Family

ID=19873272

Family Applications (1)

Application Number Title Priority Date Filing Date
US390526A Expired - Lifetime US1904174A (en) 1928-09-01 1929-09-05 Arrangement for transmitting wireless signals

Country Status (4)

Country Link
US (1) US1904174A (ru)
BE (1) BE362578A (ru)
DE (1) DE547365C (ru)
FR (1) FR679420A (ru)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4152707A (en) * 1976-08-11 1979-05-01 U. S. Philips Corporation Antenna feed system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4152707A (en) * 1976-08-11 1979-05-01 U. S. Philips Corporation Antenna feed system

Also Published As

Publication number Publication date
FR679420A (fr) 1930-04-12
BE362578A (ru)
DE547365C (de) 1932-03-23

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