US1874941A - Aerial system for wireless signaling - Google Patents

Aerial system for wireless signaling Download PDF

Info

Publication number
US1874941A
US1874941A US319707A US31970728A US1874941A US 1874941 A US1874941 A US 1874941A US 319707 A US319707 A US 319707A US 31970728 A US31970728 A US 31970728A US 1874941 A US1874941 A US 1874941A
Authority
US
United States
Prior art keywords
aerials
aerial
energy
wireless signaling
wave length
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
US319707A
Other languages
English (en)
Inventor
Eckersley Thomas Lydwell
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 US1874941A publication Critical patent/US1874941A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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 aerial systems for wireless signaling, and has for its principal object to provide an aerial system which, while simple and cheap to construct, shall'be 5 capable of more eflicient radiation or reception.
  • each aerial will receive a definite amount of energy, one half of which is supplied to the load. If, therefore, the two aerials are properly coupled to the load, the energy which will be received from the two aerials is twice that which would be received upon a single aerial.
  • the radiation re-- sistance of the system is a function of the separation of the aerials, and the value 0 (where R is the radiation resistance of a single aerial) has a fairly well marked minimum when the separation of theaerials is .57 of the wave length, at which separation the ratiofg wpproximately) .3.v
  • the separation of adjacent aerials is approximately .57 of the, wave length, and should not exceed .75 of the wave length or be less than .43 of the wavelength.
  • the said circuit is constituted by a receiving circuit and the aerials are energized in phase by being erected in a line at right angles to the direction of the incoming signals.
  • a pair of vertical aerials each containing a V series tuning condenser is erected at a'sepa-' ration of .57 of the wave lengthand the energy from each of the said aerials is supplied via a tapped aerial transformer and a feeder to a pair oftappings upon an inductance coil forming part ofa tuned, cirp cuit.
  • the two tuned circuits are coupled to asingle coil associated with an amplifier and receiver.
  • the nvention is lllustrated 1n the accompanyingdrawing, which shows schematically one arrangement in accordance therewith.
  • A-B are two similar aerials of any known kind, for example, they may be ordinary open aerials or they may be vertical aerials whose length is a multiple of a half wave length, and in which the radiation from alternate half wave lengths is annulled or reduced.
  • the aerials A B are separated by a distance of from .48 to .75 of a wave length, but preferably by a distance equal to .57 of a wave length, and are connected at tapping points T1, T and T2, T, to a pair of parallel connected feeders actual radiation resistance of the system as a whole is less than the radiation resistance of the separate aerials considered in parallel.
  • An aerial system comprising a plurality of aerials coupled to a single circuit and formers together, the feeders being tapped to points on the transformerv such that the portion of the transformer included between the feeder tapping points equals, for eachradiator, the surge impedance of the corresponding radiator, a transformer connected across said feeders, and, a transmissionline tapped to said last mentioned transformer.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Transmitters (AREA)
US319707A 1927-11-18 1928-11-15 Aerial system for wireless signaling Expired - Lifetime US1874941A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB31067/27A GB305733A (en) 1927-11-18 1927-11-18 Improvements in or relating to aerial systems for wireless signalling

Publications (1)

Publication Number Publication Date
US1874941A true US1874941A (en) 1932-08-30

Family

ID=10317466

Family Applications (1)

Application Number Title Priority Date Filing Date
US319707A Expired - Lifetime US1874941A (en) 1927-11-18 1928-11-15 Aerial system for wireless signaling

Country Status (5)

Country Link
US (1) US1874941A (enrdf_load_stackoverflow)
BE (1) BE355892A (enrdf_load_stackoverflow)
FR (1) FR663806A (enrdf_load_stackoverflow)
GB (1) GB305733A (enrdf_load_stackoverflow)
NL (1) NL28445C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424968A (en) * 1942-06-02 1947-08-05 Standard Telephones Cables Ltd Directive antenna system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424968A (en) * 1942-06-02 1947-08-05 Standard Telephones Cables Ltd Directive antenna system

Also Published As

Publication number Publication date
NL28445C (enrdf_load_stackoverflow)
FR663806A (fr) 1929-08-26
GB305733A (en) 1929-02-14
BE355892A (enrdf_load_stackoverflow)

Similar Documents

Publication Publication Date Title
US1947256A (en) Antenna counterpoise system
US2310692A (en) Method of and means for reducing multiple signals
US1874941A (en) Aerial system for wireless signaling
US3465344A (en) Single antenna dual frequency band signal coupling system
US2423083A (en) Loop antenna system
US2507915A (en) Coupling circuit
US1773355A (en) Wireless-telegraph receiving system
US1658740A (en) Radio receiving system
US1313070A (en) cohen
US2208810A (en) Antenna system
US2189688A (en) Multiband radio receiver
US2096031A (en) Aerial system
US1628676A (en) Receiving arrangement for wireless telegraphy
US2373458A (en) Transmission line coupling system
US2195301A (en) Radio receiver
US1821402A (en) Antenna
US1753308A (en) Radio receiving system
US1933778A (en) Radio receiving system
US1683127A (en) Selective signaling system
US2005388A (en) Wireless apparatus
US1857359A (en) Radio signaling
US1912766A (en) Receiving arrangement with aperiodic directional aerial system
US2149726A (en) Antenna system
US956165A (en) Electrical space communication.
US1597848A (en) Method and apparatus for radiosignaling