US2494198A - Antenna system - Google Patents

Antenna system Download PDF

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Publication number
US2494198A
US2494198A US664495A US66449546A US2494198A US 2494198 A US2494198 A US 2494198A US 664495 A US664495 A US 664495A US 66449546 A US66449546 A US 66449546A US 2494198 A US2494198 A US 2494198A
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US
United States
Prior art keywords
conductor
conductors
antenna system
line
phase
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
US664495A
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English (en)
Inventor
Posthumus Klaas
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.)
Hartford National Bank and Trust Co
Original Assignee
Hartford National Bank and Trust 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
Application filed by Hartford National Bank and Trust Co filed Critical Hartford National Bank and Trust Co
Application granted granted Critical
Publication of US2494198A publication Critical patent/US2494198A/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
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/06—Rhombic antennas; V-antennas

Definitions

  • the present invention has for its object. toprovide an extremely suitable method of connecting and arranging the feed conductors in an antenna system comprising such a pair of-cond-uctors.
  • one conductor of the pair of conductors is interrupted atsa current loop, which occurs at a point preferably midway the ends, and the connecting terminals thus formed are respectively connected to the conductors of a twin-core feed line, the other conductor being connected to a single-core feed conductor at the voltage loop which occurs at the point corresponding to the point of interruption.
  • the single-core feed conductor is provided midway between the conductors of the twin-core feed line.
  • the reference number designates a half-rhomb antenna located in a horizontal plane for the emission of oscillations to be transmitted mainly in the horizontal direction indicated by the arrow 2.
  • the antenna is composed, in a manner known per se, of two juxtaposed parallel conductors 3, 3' and i, 4 which are arranged at a small distance from each other so that they are strongly coupled by radiation.
  • the ends of the conductor 3, 3', in contradistinction to those of the conductor 4, 4, are earthed so that, since the length of the conductors is a whole multiple of the operating wave length, a current loop occurs at the middle of the conductor 3, 3, whereas a voltage loop occurs at the middle of the conductor 6, 4'.
  • the conductor 3, 3' is interrupted at the middle where it is connected to a feed line 5 consisting of two conductors, while the middle of the 690-, AuguSt8,'-'1946 umber-2,1396% conductor 6 areinductwel-y coupled, with coils 8 and 9 respectively which are connected to a transmitter 1 a displaced in phase by In thisway the conductor halves '3 andt fed in push-pull, whereas the .4 and 3- are fed in parallel with a phase displacementofeo with respecttothe conductor halves 3 and 3'.
  • An antenna system comprising first and second radiating conductors: juxtaposed in par allel rel-ationtand, having respective lengths substantially equal to a whole multiple of the operating wave-length of the antenna system, said mediate wire of said line being connected to the midpoint of said second conductor.
  • An antenna system comprising first and second radiating conductors juxtaposed in parmeans for applying voltages displaced in phase line, and means for and a transmission line for feeding said conuctors, said line being formed by three equispaced parallel wires, the outer wires of said line ⁇ being connected to said input terminals and the center wire being connected to the midpoint of said second conducto .7
  • An antenna system comprising first and second radiating conductors juxtaposed in par spaced parallel wires, the outer wires of said line I being connected to said input terminals and the center wire being connected to the midpoint of f for applying radio said second conductor, means frequency voltages of a predetermined wavelength and displaced 180' in phase from each other to the two outer wires of said line, and means for applying a radio frequency voltage of said wavelength and displaced 90 in phase from the voltages in the outer wires to the center wire of said line.
  • An antenna system adapted to be energized from a source of high frequency voltage having a predetermined wavelength, said system comprising first and second radiating conductors juxtaposed in parallel relation each having a total length substantially equal to a whole multiple of the operating wavelength of said system, said first conductor being divided at the midpoint thereof to provide input terminals thereto, said first conductor being directly grounded at the extremes thereof, a transmission line for feeding said conductors, said lines being formed by three parallel wires, the two outer wires of said line being connected to said input terminals and the intermediate wire being connected to the midpoint of said second conductor, a first transformer having a primary connected to the voltage source and a centertapped secondary whose ends are connected to said outer wires and whose centertap is grounded, and asecond transformer having a primary connected to the voltage source and a secondari having one end thereof connected to said intermediate wire and the other end thereof grounded.

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  • Variable-Direction Aerials And Aerial Arrays (AREA)
US664495A 1942-10-02 1946-04-24 Antenna system Expired - Lifetime US2494198A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL618532X 1942-10-02

Publications (1)

Publication Number Publication Date
US2494198A true US2494198A (en) 1950-01-10

Family

ID=19788352

Family Applications (1)

Application Number Title Priority Date Filing Date
US664495A Expired - Lifetime US2494198A (en) 1942-10-02 1946-04-24 Antenna system

Country Status (5)

Country Link
US (1) US2494198A (da)
DE (1) DE863682C (da)
FR (1) FR898393A (da)
GB (1) GB618532A (da)
NL (1) NL62600C (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5103235A (en) * 1988-12-30 1992-04-07 Checkpoint Systems, Inc. Antenna structure for an electronic article surveillance system

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2027020A (en) * 1932-09-15 1936-01-07 Rca Corp Directional antenna
US2095078A (en) * 1934-05-29 1937-10-05 Rca Corp Directive antenna system
US2110715A (en) * 1936-03-28 1938-03-08 Rca Corp Antenna system
US2207504A (en) * 1937-12-24 1940-07-09 Rca Corp Aerial system
US2208749A (en) * 1937-02-09 1940-07-23 Emi Ltd Aerial system
US2247757A (en) * 1938-06-20 1941-07-01 Telefunken Gmbh Antenna for unidirectional radiation of radio waves
US2251997A (en) * 1938-10-22 1941-08-12 Internat Telephone Dev Co Inc Directional radio system
US2267945A (en) * 1938-10-21 1941-12-30 Telefunken Gmbh Long wire antenna
US2368286A (en) * 1942-01-28 1945-01-30 Rca Corp Antenna system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2027020A (en) * 1932-09-15 1936-01-07 Rca Corp Directional antenna
US2095078A (en) * 1934-05-29 1937-10-05 Rca Corp Directive antenna system
US2110715A (en) * 1936-03-28 1938-03-08 Rca Corp Antenna system
US2208749A (en) * 1937-02-09 1940-07-23 Emi Ltd Aerial system
US2207504A (en) * 1937-12-24 1940-07-09 Rca Corp Aerial system
US2247757A (en) * 1938-06-20 1941-07-01 Telefunken Gmbh Antenna for unidirectional radiation of radio waves
US2267945A (en) * 1938-10-21 1941-12-30 Telefunken Gmbh Long wire antenna
US2251997A (en) * 1938-10-22 1941-08-12 Internat Telephone Dev Co Inc Directional radio system
US2368286A (en) * 1942-01-28 1945-01-30 Rca Corp Antenna system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5103235A (en) * 1988-12-30 1992-04-07 Checkpoint Systems, Inc. Antenna structure for an electronic article surveillance system

Also Published As

Publication number Publication date
GB618532A (en) 1949-02-23
DE863682C (de) 1953-01-19
FR898393A (fr) 1945-04-20
NL62600C (da)

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