US1814813A - Radio signaling system - Google Patents

Radio signaling system Download PDF

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Publication number
US1814813A
US1814813A US72128A US7212825A US1814813A US 1814813 A US1814813 A US 1814813A US 72128 A US72128 A US 72128A US 7212825 A US7212825 A US 7212825A US 1814813 A US1814813 A US 1814813A
Authority
US
United States
Prior art keywords
generator
current
frequency
alternately
antenna
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
US72128A
Other languages
English (en)
Inventor
Ernst F W Alexanderson
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.)
General Electric Co
Original Assignee
General Electric Co
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
Priority to BE338054D priority Critical patent/BE338054A/xx
Priority to NL19191D priority patent/NL19191C/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US72128A priority patent/US1814813A/en
Priority to FR625233D priority patent/FR625233A/fr
Priority to GB30298/26A priority patent/GB262152A/en
Priority to DEI29635D priority patent/DE471741C/de
Application granted granted Critical
Publication of US1814813A publication Critical patent/US1814813A/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
    • H04B7/10—Polarisation diversity; Directional diversity
    • 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

Definitions

  • nonreception of thesi'g na'l due to inaccurate tuning is avoided by modulating or WObr bling the frequency of the carrier wave, and non-reeeption of the signal due to fading is avoided either by wobbling the frequencyof the carrier wave,.or by periodically alternatthe olarization of thecarrier wave between vertical and horizontal planes.
  • Figs. 1 and 2 show signaling systems wherein different devices are utilized to wobble the frequency of the carrier wave; and Fig.3 shows a sig naling system comprisingmeans for shifting the polarization of the carrier wave to and fro between different planes.
  • an oscillation generator 1 comprising a thermionic device 2, a condenser 3, a coil sand a coil 5 coupled to the coil 4 for controlling the grid potential of the device 2.
  • Current is suppliedto the genorator '1 through frequency choke 6 so, 1925. Serial no. 72,128.
  • a modulating device comprising a stationary member 10 connected to the antenna 8 and a rotatable member 11 connected to the generator at the junction between the coils 4 and 5 is provided for modulating or wobbling the frequency of this current.
  • the rotatable member '11 is mechanically coupled to suitable driving means 12 andis provided with segments 13 which cooperate with the'stationary member 10 to periodically change the tuning of the oscillation generator in a manner that will be readily understood without detailed explanation.
  • Fig. 2 shows a signaling system wherein a modulating device of the magnetic type is connected in shunt to a section of the coil 1 for wobbling the frequency of the current supplied to the antenna 8.
  • This device comprises oppositely wound coils 15 and 16 and an excitation coil 17 which is connected to the direct current circuit 7 through an oscillation generator 18 of a well known type.
  • the tuning of the oscillationgenerator 1 will obviously depend on the inductance of the modulator or Wobbler 14 and this inductance will vary at a rate determined by the frequency of the current supplied to the magnetic field coil 17 from the generator 18.
  • Fig. 3 shows a signaling system wherein current supplied from a high frequency source, diagrammatically indicated as a generator 19, is alternately 'adiated from an tennze 20 and 21.
  • the antenna 20 is a well known type of vertically polarized radiator.
  • the antenna 21 is a horizontal loop radiator provided with series condensers for neutralizing its series inductance. lVith this type of radiator, horizontally waves directed to all points of the compass are produced.
  • Modulating devices 23 and 24 connected in shunt to the antennm 21 and 20 respectively are provided for alternately transmitting current to these antennae.
  • the generators l9 and 28 may be oscillation generators similar to those illustrated by Fig. 2, or may be any other suitable type of high frequency generator.
  • the rapidity with which the generated current is shifted from one antenna to another will of course be determined by the frequency at which the generator 28 is oper ated.
  • the system 23, 24, 28 is peculiarly adapted to effect the alternate energization of the antennae at high speed since they are entirely electrical in action, serving through variations of impedance of devices 28 and 24 to render the permanent energy transfer paths extending between the source 19 and the different antennae alternately ineffective.
  • an antenna arranged to radiate oscillations having a predominant polarization in a certain plane
  • a second antenna independent of said first antenna arranged to radiate oscillations having a predominant polarization in a different plane
  • a single source of high frequency oscillations and means entirely electrical for alternately energizing said antennae from said source thereby alternately to radiate oscillations having a predominant polarization in different planes, the oscillations radiated by said antennae having the frequency of said source.
  • an antenna arranged to extending radiate oscillations having a predominant polarization in a certain plane
  • a second antenna arranged to radiate oscillations having 'a predominant polarization in a different plane
  • a single high frequency oscillation generator arranged to radiate oscillations having 'a predominant polarization in a different plane
  • a single high frequency oscillation generator arranged to radiate oscillations having 'a predominant polarization in a different plane
  • a single high frequency oscillation generator arranged to radiate oscillations having 'a predominant polarization in a different plane
  • a single high frequency oscillation generator arranged to radiate oscillations having 'a predominant polarization in a different plane
  • a single high frequency oscillation generator arranged to radiate oscillations having 'a predominant polarization in a different plane
  • a single high frequency oscillation generator arranged to radiate oscillations having 'a predominant polarization in a different plane
  • a single high frequency oscillation generator arranged to radiate oscillation
  • an antenna arranged to radiate oscillations having a predominant polarization in a certain plane
  • a second antenna arranged to radiate oscillations having a predominant polarization in a different plane
  • a single high frequency oscillation generator arranged to radiate oscillations having a predominant polarization in a different plane
  • a single high frequency oscillation generator arranged to radiate oscillations having a predominant polarization in a different plane
  • a single high frequency oscillation generator arranged to radiate oscillations having a predominant polarization in a different plane
  • a single high frequency oscillation generator arranged to radiate oscillations having a predominant polarization in a different plane
  • a single high frequency oscillation generator arranged to radiate oscillations having a predominant polarization in a different plane
  • a single high frequency oscillation generator arranged to radiate oscillations having a predominant polarization in a different plane
  • a single high frequency oscillation generator arranged to radiate oscillations having a predominant polarization in

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Transmitters (AREA)
  • Radar Systems Or Details Thereof (AREA)
US72128A 1925-11-30 1925-11-30 Radio signaling system Expired - Lifetime US1814813A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BE338054D BE338054A (enrdf_load_stackoverflow) 1925-11-30
NL19191D NL19191C (enrdf_load_stackoverflow) 1925-11-30
US72128A US1814813A (en) 1925-11-30 1925-11-30 Radio signaling system
FR625233D FR625233A (fr) 1925-11-30 1926-11-29 Perfectionnements aux émetteurs de radio-signaux
GB30298/26A GB262152A (en) 1925-11-30 1926-11-30 Improvements in radio signalling systems
DEI29635D DE471741C (de) 1925-11-30 1926-12-01 Sendeverfahren fuer drahtlose Nachrichtenuebermittlung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US72128A US1814813A (en) 1925-11-30 1925-11-30 Radio signaling system

Publications (1)

Publication Number Publication Date
US1814813A true US1814813A (en) 1931-07-14

Family

ID=22105760

Family Applications (1)

Application Number Title Priority Date Filing Date
US72128A Expired - Lifetime US1814813A (en) 1925-11-30 1925-11-30 Radio signaling system

Country Status (6)

Country Link
US (1) US1814813A (enrdf_load_stackoverflow)
BE (1) BE338054A (enrdf_load_stackoverflow)
DE (1) DE471741C (enrdf_load_stackoverflow)
FR (1) FR625233A (enrdf_load_stackoverflow)
GB (1) GB262152A (enrdf_load_stackoverflow)
NL (1) NL19191C (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457137A (en) * 1942-05-22 1948-12-28 Int Standard Electric Corp Ultra high frequency system
US2465341A (en) * 1941-02-08 1949-03-29 Int Standard Electric Corp Electric wave transmission system
US2824955A (en) * 1950-03-09 1958-02-25 Westinghouse Electric Corp Radio transmitting system
US2917741A (en) * 1952-09-12 1959-12-15 Marconi Wireless Telegraph Co Radio direction finders
US3000634A (en) * 1946-03-26 1961-09-19 Frank C South Target sleeve
US3046472A (en) * 1954-01-15 1962-07-24 Gen Motors Corp Random sweep generator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1259415B (de) * 1962-02-10 1968-01-25 Bundesrep Deutschland Verfahren zur drahtlosen Geheimuebertragung von Signalen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465341A (en) * 1941-02-08 1949-03-29 Int Standard Electric Corp Electric wave transmission system
US2457137A (en) * 1942-05-22 1948-12-28 Int Standard Electric Corp Ultra high frequency system
US3000634A (en) * 1946-03-26 1961-09-19 Frank C South Target sleeve
US2824955A (en) * 1950-03-09 1958-02-25 Westinghouse Electric Corp Radio transmitting system
US2917741A (en) * 1952-09-12 1959-12-15 Marconi Wireless Telegraph Co Radio direction finders
US3046472A (en) * 1954-01-15 1962-07-24 Gen Motors Corp Random sweep generator

Also Published As

Publication number Publication date
BE338054A (enrdf_load_stackoverflow)
DE471741C (de) 1929-02-16
GB262152A (en) 1927-05-26
FR625233A (fr) 1927-08-05
NL19191C (enrdf_load_stackoverflow)

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