US1752864A - Antenna system - Google Patents

Antenna system Download PDF

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Publication number
US1752864A
US1752864A US300727A US30072728A US1752864A US 1752864 A US1752864 A US 1752864A US 300727 A US300727 A US 300727A US 30072728 A US30072728 A US 30072728A US 1752864 A US1752864 A US 1752864A
Authority
US
United States
Prior art keywords
coil
wave
radiated
length
antenna system
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
US300727A
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English (en)
Inventor
Laurens A Taylor
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 NL31409D priority Critical patent/NL31409C/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US300727A priority patent/US1752864A/en
Application granted granted Critical
Publication of US1752864A publication Critical patent/US1752864A/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
    • H01Q1/00—Details of, or arrangements associated with, antennas

Definitions

  • My invention relates to antennae systems and more particularly. to an antenna system which is adapted for operation on short wave lengths.
  • v V i Ithas for its purpose to provide a system of the type indicated which is adapted to radiate .large amounts of power at'short wave lengths and in which absorption losses in the ground are a minimum.
  • my invention has for its purpose to provide an antenna system of simple construction which has the property of projecting the radiated wave into the higher strata of the atmosphere whereby it is efficiently transmitted to remote receivers and sufiers a minimum of loss due to absorption in the ground.
  • 1 rep resents a vertical radiating member having a length substantially equal to one-half ofthe length of the wave which is to be radiated.
  • This member is suspended from a suitable supporting member 2 which extends between towers 3 and 4.
  • a suitable supporting member 2 which extends between towers 3 and 4.
  • an inductance coil 5 this coil having one terminal thereof connectas to its organization and method of opera-- ed to the midpoint ofa horizontal member 6.
  • This horizontal member has a length which is less than one-half of the wavev length of the wave which is to be radiated and is located in proximity to and above the earth.
  • the upper terminal of the coil may be connected to the lower end of the radiating member 1 by means of an adjustable tap 1 by means of which desired tuning of the antenna may be effected.
  • the 7 represents suitable high frequency transmitting apparatus, the output circuit of which is connected through suitable conductors, such as those of a transmission line'8, to points 9'and 10 upon-the coil 5, these points being at equal distance from a node of volt-age on the coil.
  • the coil 5 has inductance such that it resonates with the capacity existing'between this coil and the horizontal conductor 6.
  • Sufficient inductance is included in the section 15 of coil 5 to produce a very high potential at the point of connection with themember l'this potential serving to cause theradiating member 1 to oscillate.
  • the oscillations of the radiating member will have a voltage node at the midpoint thereof.
  • the voltage wave of member 1 is represented by curve 11 and that on coil 5 and member 6 is represented by curves 12 and 13 respectively.
  • Its length extending from the lower terminal of coil 5 should be sufficiently less than one quarter of a wave length of the radiated Wave to permit the two conductors of the transmission line to be connected oppositely and symmetrically with respect to the node of voltage of the coil, and at the same time to permit these conductors to be connected to the coil at suflicient distances apart properly to terminate the transmission line. It must, of course, be of sufficient length to cause the vertical radiating member to be properly driven. I have found that much better results can be had with this arrangement than with any of the non-directive antennae of the prior art utilizing counterpoises.
  • My antenna has important advantages over any of the prior art in the manner in which it is assembled;
  • the coil 5 and conductor 6 are in close proximity to the earth such that connections thereto, such as the transmission line connections and the connection of tap 1,
  • the radiating member 1 may be varied with convenience by one standing onthe ground; the former for the purpose of properly terminating the transmission llne and the latter for the purpose of tuning the antenna system. Since the radiating member 1 operates efficiently over a substantial range of wave lengths no adjustments within this range need be made other than those which can conveniently be made from the ground.

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  • Near-Field Transmission Systems (AREA)
US300727A 1928-08-20 1928-08-20 Antenna system Expired - Lifetime US1752864A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL31409D NL31409C (xx) 1928-08-20
US300727A US1752864A (en) 1928-08-20 1928-08-20 Antenna system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US300727A US1752864A (en) 1928-08-20 1928-08-20 Antenna system

Publications (1)

Publication Number Publication Date
US1752864A true US1752864A (en) 1930-04-01

Family

ID=23160324

Family Applications (1)

Application Number Title Priority Date Filing Date
US300727A Expired - Lifetime US1752864A (en) 1928-08-20 1928-08-20 Antenna system

Country Status (2)

Country Link
US (1) US1752864A (xx)
NL (1) NL31409C (xx)

Also Published As

Publication number Publication date
NL31409C (xx)

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