US2205174A - Directional antenna system - Google Patents

Directional antenna system Download PDF

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Publication number
US2205174A
US2205174A US246769A US24676938A US2205174A US 2205174 A US2205174 A US 2205174A US 246769 A US246769 A US 246769A US 24676938 A US24676938 A US 24676938A US 2205174 A US2205174 A US 2205174A
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US
United States
Prior art keywords
loops
antenna system
radiating
radiators
directional 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
US246769A
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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.)
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
Application granted granted Critical
Publication of US2205174A publication Critical patent/US2205174A/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
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/061—Two dimensional planar arrays
    • H01Q21/062—Two dimensional planar arrays using dipole aerials

Definitions

  • This invention relates to a directional antenna system which has the property of concentrating the energy to beams extending in two directions perpendicular to each other.
  • the system consists of a certain number of parallel radiating bodies each of which has an electric length 0f a half wave length, the two ends of at least a part of these radiating bodies being connected l0 to a non-radiating feed-system in such a manner that all of these radiating bodies are excited in the same phase.
  • the feed-system preferably consists of a double lead each of the conductors including loops which lie opposite each other at a distance of a half wave length and have an electric length of one or more half wave lengths.
  • the antenna system shown in Figure 1 comprises a certain number of radiating bodies I,
  • each loop amounts to two wave lengths and the spatial distance between the radiating bodies I and 2, 2 and 3, 3 and I amounts to a half wave length in each distance.
  • the radiating bodies are connected to the loops in such a manner that all of them are excited in the same phase. To this end the radiating body I is, for instance, connected to the part 6 of the loop 6, whereas the radiating body 2 is connected to the part 6 of the loop 6.
  • the other ends of the radiating bodies I and 2 are connected to corresponding points of the loop 1.
  • the radiating bodies 3 and 4 are connected to the loops 8 and 9 as appears from the drawing.
  • the double conductor 5 By lengthening the double conductor 5 and providing further loops extending parallel with the loops 'I, 8 and at mutual distances of a half wave length and which are connected through corresponding radiating bodies to the loops 1, 8 and may, if desired,
  • ies I, 2, 3 and 4 are connected to the loops 6, l, 8 and 9.
  • Figure 2 shows an improved embodiment of the invention which is endowed of the advantage that the whole antenna system extends in one plane so that the suspension is greatly simplified.
  • This advantage is secured by providing in each 15 instance a crossing between two succeeding feedpoints of the system, since this measure permits the two parts of each loop to extend in the same plane as the radiating bodies.
  • each conductor offthe double lead 5 comprises three loops 6, 1, I5and 8, 9, I3, respectively, the
  • loops 'I and I5 being connected through the intermediary of radiating bodies Il, I2 and the loops 8 and I6 being connected through radiat- 25 ing bodies I3, I4.
  • form of construction represented in Figure 2 corresponds to that represented in Figure 1 but with the difference that crossings are in each instance provided in the loops between two succeeding feedpoints. These crossings are provided in such manner that upon connecting the radiating bodies to correspondingly arranged parts of each of the loops all radiating bodies are excited in the same phase.
  • the whole system may be suspended 35 from the complementary radiating bodies l0 and the ends of the loops may be supported by two vertical antenna posts.
  • Figure 3 shows a simplified construction of the antenna system according to the invention where- 40 in the electric length of each loop amounts to a half wave length.
  • the system comprises two groups of three radiating bodies which extend in line with each other and of which only the middle radiating body is fed at both ends. On ac- 45 count of the small width of the system it is not necessary to support the ends of the loops, so that the loop portions extending beyond the radiating bodies permit of being bent towards each other, if required, in view of the available space. 50
  • the antenna system according to the invention may be provided, if desired, with reflectors, whose construction corresponds to that of the antenna system, and may be located at a suitable distance behind the antenna. 55
  • a directional antenna system comprising a plurality of half wave radiating members grouped in an end to end relationship in a plurality of vertical lines and means for energizing said radiators comprising a transmission line connected to a plurality of feed loops, said loops lying between the ends oi said radiators and connected thereto, said loops being crossed between adjacent lines whereby said radiators are energized in an iii-phase relationship.
  • a directional antenna oyster comprising plurality of half wave radiating l nbers grouped in an end to end relationship in a plurality of vertical lines spaced a ft a disiance equal to a half wavelength and means f energizing said radiators comprising a trannilssion line connected to a plurality of series connected iced loops, said feed loops lying between the ends of said radiators and connected thereto, said loops being crossed between adjacent lines whereby said radiators are energized in an in-phase relationship.
  • a directional antenna system comprising a plurality of heli wave radiati.. members grouped in an ond to end relationship in o plurality of parallel lines in a single vertical plane spaced apart a distance equal to a hall the length of he operating wave and means for energizing said radiators comprising a transmission line connected to a plurality of series connected feed loos, loops lyir g between the ends of said radiators and connected thereto, said loops mecanic; crossed betw -cn adjacent lines whereby said radiators are one giized in in--phase relationship.
  • a directional antenna system comprising a plurality of half ware radiating members grouped in an end to end relationship in a plurality of vertical lines and means for energizing said radiators comprising a transmission line connected to a plurality of feed loops, said loops lying between the ends of said radiators and conncced thereto, the distance between adjacent connoctions being equal to a nali ⁇ '.fa' ⁇ .'e1o. said loups being crossed between adjacent unos whereby said radiale s are energized in an iii-phase i l tionship.
  • a directional antenna system comprising a plurality oi half wave radiating member. grouped in an end to end relationship in a plr-.rality of vertical .lines spaced apart a distance equal to a half wavelength and means for energizing said radiators comprising a transmission line connected to a plurality of series connected leed loops, said feed loops lying between the ends of said radiators and connected thereto, the distance between adjacent connections being equal to a hall wavelength, said loops being crossed between adjacent lines whereby said radiators are energized in an iii-phase relationship.
  • a directional antenna system comprising a plurality of half wave radiating members grouped in an ond to end relationship in a plurality of parallel lines in a single vertical plane spaced apart a distance equal to a half the length of the operating wave and means for energizing said radiators comprising a transmission line connected to a plurality of series connected feed loops, said loops lying between the ends of said radiators and connected thereto, the distance between adjacent connections being equal to a half wavelength, said loops being crossed between adjacent lines whereby said radiators are energized in an in-phase relationship.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)
US246769A 1938-01-14 1938-12-20 Directional antenna system Expired - Lifetime US2205174A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL523641X 1938-01-14

Publications (1)

Publication Number Publication Date
US2205174A true US2205174A (en) 1940-06-18

Family

ID=19787032

Family Applications (1)

Application Number Title Priority Date Filing Date
US246769A Expired - Lifetime US2205174A (en) 1938-01-14 1938-12-20 Directional antenna system

Country Status (4)

Country Link
US (1) US2205174A (fr)
FR (1) FR848780A (fr)
GB (1) GB523641A (fr)
NL (2) NL54630C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2870443A (en) * 1953-04-15 1959-01-20 Leonard J Lynch Television antenna

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2870443A (en) * 1953-04-15 1959-01-20 Leonard J Lynch Television antenna

Also Published As

Publication number Publication date
NL85978B (fr)
NL54630C (fr)
FR848780A (fr) 1939-11-07
GB523641A (en) 1940-07-18

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