US1569835A - Radio transmission system - Google Patents

Radio transmission system Download PDF

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Publication number
US1569835A
US1569835A US5737A US573725A US1569835A US 1569835 A US1569835 A US 1569835A US 5737 A US5737 A US 5737A US 573725 A US573725 A US 573725A US 1569835 A US1569835 A US 1569835A
Authority
US
United States
Prior art keywords
units
transmission line
radiating
series
currents
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
US5737A
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English (en)
Inventor
Edward W Kellogg
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 BE331756D priority Critical patent/BE331756A/xx
Priority to DEI26477D priority patent/DE433287C/de
Application filed by General Electric Co filed Critical General Electric Co
Priority to US5737A priority patent/US1569835A/en
Priority to GB523/26A priority patent/GB246816A/en
Application granted granted Critical
Publication of US1569835A publication Critical patent/US1569835A/en
Priority to FR610223D priority patent/FR610223A/fr
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

  • NEW YORK ASSIGNOR TO GENERAL ELEG- TRIO COMPANY, A GQRPORATION or NEW YORK.
  • One of the objects of my present invention is to provide a simple and effective means for supplying currents to the different radiating unitsin a system of the class described in such a way that the phase relations between the different currents will be those necessary for producing the desired directive effect.
  • I provide a single transmission line for supplying currents to all of the radiating units.
  • the radiating units should be separated from. one another by distances of the order of a quarter wave length and the currents in the different units must differ in phase by similar fractions of a cycle. If the transmission line is so constructed that waves are propagated thereon at substantially light velocity the base differences of the currents supplied at t e different feeding points along its length will be correct for a unidirectional system. This will be true, however, only in case there are no reflections over the line from the .feed points and the line carries waves in one direction only. If a number of loads are connected to a transmission line either as shunt or series loads, reflections will result and the proper phase "relations will not be secured.
  • a more specific; object of my invention is to provide, means whereby current may be.
  • I provlde means at each feeding point wherer by the loadsare a combination of shunt and series loads.
  • Still another object of my invention is to provide means whereby the energy supplied y the transmission line will be equally divided among the different radiating units.
  • This object may be attained by suitable proportionin of the load resistances at the different fee ing oints in a manner which will also be more ully described.
  • Figs. 1 and 2 are diagrammatic. representations of networks having suitable constants for obtaining the results of my invention
  • Fig.3 is a diagrammatic representation of the application of my invention toa radio transmitti-ng system.
  • Thenormal high 'efliciency unloaded line has a characteristic or surge impedance which is practically equivalent toa pure to construct afladder type network of SQ:
  • the transmission line may then be cut and as many sections of this network as desired introduced and no reflections will result, but attenuation will take place in the resistance network, depending on'the number of sections introduced, or on the ratio of series to shunt resistance. By this means any desired fraction of the power carried by t the line may be absorbed in a local network,
  • R is the series resistance per sec- R is the shunt resistance per section
  • Z is the line surge resistance
  • K is the ratio of the current on the two sides of a section or the square-root of the ratio of power received to power passed on.
  • each section is a T network (i. e., two equal series resistances and one shunt resistance), as much as 50% of the power may be absorbed in a single section, the above formulas may be used without material error.
  • the hue surge resistance is 1000 ohms and that 11: is desired to use up equal amounts of power at a series of points, A, B, C, etc.
  • Fig. 1 represents a line with a series of networks introduced. The losses in the line itself are neglected.
  • A the load reslstance must be equal to Z or 1000 ohms 1f reflection is to be avoided. Taking the current at A as 1 ampere the power absorbed will be 1 k. w.
  • An equal amount of power must be absorbed at B or power received- ,IR R, 1000
  • the network at G is to receive 3 k. w. and pass on 2 k. w., whence K z3/2,
  • the networks might consist of simple L sections, but in this case a different formula is-required. If the forward moving wave encounters first the series resistance R, and then the shunt resistance R, as in Fig. 2.
  • K is the current ratio on the two sides of the network, or the square root of the power ratio.
  • Each unit except 8 is coupled to the transmission line by series coupling transformers 9 and 10 and a shunt coupling transformer 11.
  • the last unit 8 requires only the single coupling transformer 12.
  • the current through the series coils and the voltage across the shunt coil are in phase. It the latter constitutes a resistance load the current through it will be in phase with that through the series coils. Under these circumstances both can be coupled to the same secondary circuit and each can be made to contribute its share to the power in the secondary circuit.
  • a radio transmitting system of a radiating system comprising a plurality of radiating units separated from one another by an appreciable fraction of a wave length of the waves to be radiated, a single transmission line for supplying to said radiating units currents havplyingto said radiating units currents having p ase displacements corresponding to the geographical displacements of the units from one another, means for preventing wave reflections over said transmission line from the points at which energy is supplied to the radiating units, and means for roducing a substantially uniform. distrlbu-- tion of power to all of said radiating units.
  • a radio transmitting system of a radiating system comprising a plurality of radiating units se arated from one another by an appreciab e fraction of a wave length of the waves to be radiated, a single transmission line for supplying to said radiating units currents having phase displacements corresponding to the geographical displacements of the units from one another, and means for feeding energy to said radiating units by both series and shunt transformer connections to said transmission line, said transformer connections being so proportioned that the power supplied by the transmission line w1ll be substantially uniformly distributed among the difl'erent radiating units.

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  • Transmitters (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
US5737A 1925-01-30 1925-01-30 Radio transmission system Expired - Lifetime US1569835A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE331756D BE331756A (da) 1925-01-30
DEI26477D DE433287C (de) 1925-01-30 Sendeanordnung fuer drahtlose Telegraphie
US5737A US1569835A (en) 1925-01-30 1925-01-30 Radio transmission system
GB523/26A GB246816A (en) 1925-01-30 1926-01-07 Improvements in radiating antenna systems
FR610223D FR610223A (fr) 1925-01-30 1926-01-29 Perfectionnements aux systèmes radio-émetteurs à action directionnelle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US5737A US1569835A (en) 1925-01-30 1925-01-30 Radio transmission system

Publications (1)

Publication Number Publication Date
US1569835A true US1569835A (en) 1926-01-12

Family

ID=21717466

Family Applications (1)

Application Number Title Priority Date Filing Date
US5737A Expired - Lifetime US1569835A (en) 1925-01-30 1925-01-30 Radio transmission system

Country Status (4)

Country Link
US (1) US1569835A (da)
BE (1) BE331756A (da)
FR (1) FR610223A (da)
GB (1) GB246816A (da)

Also Published As

Publication number Publication date
GB246816A (en) 1926-07-29
BE331756A (da)
FR610223A (fr) 1926-09-01

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