US2207781A - Ultra high frequency antenna - Google Patents

Ultra high frequency antenna Download PDF

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Publication number
US2207781A
US2207781A US210605A US21060538A US2207781A US 2207781 A US2207781 A US 2207781A US 210605 A US210605 A US 210605A US 21060538 A US21060538 A US 21060538A US 2207781 A US2207781 A US 2207781A
Authority
US
United States
Prior art keywords
antenna
sections
high frequency
ultra high
mast
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
US210605A
Other languages
English (en)
Inventor
George H Brown
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
Priority to US210605A priority Critical patent/US2207781A/en
Priority to GB15705/39A priority patent/GB529522A/en
Priority to CH214746D priority patent/CH214746A/de
Application granted granted Critical
Publication of US2207781A publication Critical patent/US2207781A/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
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/44—Resonant antennas with a plurality of divergent straight elements, e.g. V-dipole, X-antenna; with a plurality of elements having mutually inclined substantially straight portions
    • 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
    • H01Q21/20—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path

Definitions

  • zso ssi My invention relates to antennas and more particularly to an ultra high frequency antenna suitable for the radiation of horizontally polariz ed waves.
  • an object of this invention to provide an antenna which may be rigidly supported, and which does not require insulation from its supporting medium.
  • Figure 1 represents the current distribution in a dipole antenna which is folded in the form of a square, a half wave length on a side,
  • Figure 2 represents the current distribution in an antenna when modified in accordance with my invention by the inclusion of two quarter wave resonant lines
  • Figure 3 illustrates the application of four quarter wave sections to a square antenna
  • Figure 4 is a plan View of an antenna mounted on a supporting mast in the manner of my invention,-
  • Figure 5 is an elevation of Fig. i.
  • Figure '6 is a plan'view illustrating an alternative antenna construction.
  • Fig. 1' I have shown an antenna consisting of two full wave sections l and 3, each forming two sides ll, l5 and I3,-ll, of a square one half wave length on'a side.
  • The'antenna is fed by a transmission line 5, which is connected between the adjacent ends of the two sections.
  • thecurrent flowing through the antenna is as indicated by the arrows.
  • the current distribution along each wire is as shown by the dotted lines. It will be noted thatthe current in two sections is out of phase with that in the other two. Consequently, a uniform horizontal radiation pattern will not be obtained.
  • I propose to open each section I and 3 at its mid-point and insert in each a quarter wave resonant line I and 9, as shown in Fig. 2.
  • the total length of conductor in each line is a half wave length and is folded back upon itself; Therefore, undesired out of phase currents flow through the section without radiation, and bring the adjoining sections I l and I3 into phase with the original sections I5 and H.
  • the new current distribution is therefore as shown in Fig. 2 by the dotted lines.
  • FIG. 4 illustrates a practical method of utilizing this invention.
  • the figure represents a top View of a horizontal antenna consisting of four half Wave sections H, I3, l5 and H. By extending the parallel portion of the quarter rounded corners and slightly concave sides.
  • the may be securely connected to an antenna mast 23, or the like.
  • are provided for tuning the respective sections to resonance.
  • the shorting bars may conveniently be variable.
  • Fig. 5 is a side view of such an antenna which illustrates how conveniently an antenna of this description can be mounted on a mast. Insulators are not necessary and therefore the maximum strength and rigidity can be attained.
  • the transmission line is also conveniently supported by quarter wave sections spaced as necessary down the mast. One of these is shown at 33, and is similarly equipped with an adjustable shorting bar 35.
  • My-invention is not limited to an antenna having four sections but may consist of any number of sections.
  • the antenna may have a hexagonal or even a circular shape, for example, as shown in Fig. 6.
  • each half wave length section subtends an arc of approximately It can be shown that an antenna constructed according to this invention produces a horizontal radiation pattern which is generally square with Due to the elimination of insulators the antenna may be economically built and rigidly constructed.
  • An antenna system which comprises a plurality of half-wave resonant radiating elements lying in a plane and positioned so as to enclose an area, phase inverting means connecting adjacent ends of said radiating elements to each other, and means including said phase inverting means for mounting said antenna.
  • An antenna system which comprises a plurality of half-wave resonant radiating elements a mast, and means including said non-radiating elements for mounting said antenna on said mast.
  • An ultra high frequency antenna system which includes a plurality of resonant half wave radiating elements defining the sides of an area in the horizontal plane, a quarter wave resonant line connecting adjacent ends of said elements, a mast for supporting said antenna, and means rigidly connecting said mast to said quarter wave lines at a point which is substantially a voltage node, whereby said antenna is supported by and efiectively insulated from said mast.
  • An ultra high frequency antenna system which includes a plurality of radiating elements positioned end to end so as to define an area, a quarter wave resonant line connectingadjacent ends of said elements, a mast for supporting said antenna, and means connecting said mast to said.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
US210605A 1938-05-28 1938-05-28 Ultra high frequency antenna Expired - Lifetime US2207781A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US210605A US2207781A (en) 1938-05-28 1938-05-28 Ultra high frequency antenna
GB15705/39A GB529522A (en) 1938-05-28 1939-05-26 Improvements in or relating to radio antennae
CH214746D CH214746A (de) 1938-05-28 1939-05-26 Antennensystem zum Aussenden waagrecht polarisierter Wellen mit angenähert kreisförmiger Strahlungskennlinie.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US210605A US2207781A (en) 1938-05-28 1938-05-28 Ultra high frequency antenna

Publications (1)

Publication Number Publication Date
US2207781A true US2207781A (en) 1940-07-16

Family

ID=22783552

Family Applications (1)

Application Number Title Priority Date Filing Date
US210605A Expired - Lifetime US2207781A (en) 1938-05-28 1938-05-28 Ultra high frequency antenna

Country Status (3)

Country Link
US (1) US2207781A (de)
CH (1) CH214746A (de)
GB (1) GB529522A (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465379A (en) * 1945-01-27 1949-03-29 Standard Telephones Cables Ltd Antenna unit
US2518736A (en) * 1946-08-27 1950-08-15 Hazeltine Research Inc Directive loop antenna
US2520154A (en) * 1948-10-16 1950-08-29 Standard Telephones Cables Ltd Radio antenna
US2537191A (en) * 1947-05-08 1951-01-09 Clarence C Moore Antenna
US2618746A (en) * 1948-08-13 1952-11-18 Rca Corp Antenna system
US6081238A (en) * 1995-05-30 2000-06-27 Sensormatic Electronics Corporation EAS system antenna configuration for providing improved interrogation field distribution
EP1150381A4 (de) * 1999-12-02 2004-09-29 Matsushita Electric Industrial Co Ltd Antenne und funkgerät
US10594044B1 (en) 2019-03-07 2020-03-17 Jon C. Taenzer Wide-direction antenna

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465379A (en) * 1945-01-27 1949-03-29 Standard Telephones Cables Ltd Antenna unit
US2518736A (en) * 1946-08-27 1950-08-15 Hazeltine Research Inc Directive loop antenna
US2537191A (en) * 1947-05-08 1951-01-09 Clarence C Moore Antenna
US2618746A (en) * 1948-08-13 1952-11-18 Rca Corp Antenna system
US2520154A (en) * 1948-10-16 1950-08-29 Standard Telephones Cables Ltd Radio antenna
US6081238A (en) * 1995-05-30 2000-06-27 Sensormatic Electronics Corporation EAS system antenna configuration for providing improved interrogation field distribution
EP1150381A4 (de) * 1999-12-02 2004-09-29 Matsushita Electric Industrial Co Ltd Antenne und funkgerät
US10594044B1 (en) 2019-03-07 2020-03-17 Jon C. Taenzer Wide-direction antenna

Also Published As

Publication number Publication date
CH214746A (de) 1941-05-15
GB529522A (en) 1940-11-22

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