US2156051A - Ultra-short wave transmitter - Google Patents

Ultra-short wave transmitter Download PDF

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Publication number
US2156051A
US2156051A US106768A US10676836A US2156051A US 2156051 A US2156051 A US 2156051A US 106768 A US106768 A US 106768A US 10676836 A US10676836 A US 10676836A US 2156051 A US2156051 A US 2156051A
Authority
US
United States
Prior art keywords
ultra
short wave
wave transmitter
wall
generator
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
US106768A
Other languages
English (en)
Inventor
Christ Karl
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.)
Alcatel Lucent Deutschland AG
C Lorenz AG
Original Assignee
Standard Elektrik Lorenz AG
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 Standard Elektrik Lorenz AG filed Critical Standard Elektrik Lorenz AG
Application granted granted Critical
Publication of US2156051A publication Critical patent/US2156051A/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
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces

Definitions

  • the invention relates to ultra-short wave transmitters of the kind provided with a reflection structure. With these arrangements it has been experienced that the undesired backward radiation caused by such reflection structure is not lessened so much as may theoretically be expected with a reflection structure dimensioned accordingly. Careful researches have shown this phenomenon to be attributable to the reflection structure and transmitting arrangement oscillating after the manner of a dipole.
  • Fig. l is a diagrammatic representation of the known arrangement
  • Fig. 2 is a partially sectioned diagrammatic view of an example of the novel arrangement.
  • the reflection structure is constituted by a wall R.
  • an antenna structure A of any known construction, such as a socalled saw-tooth antenna or a fir-like antenna etc.
  • Wall R is formed of sheet metal or wire gauze and is dimensioned as large as possible with a view to avoiding backward radiation.
  • Antenna system A and the generator, whose casing is designated G, are interconnected by a Lecher-wire system L.
  • the Lecher wires and generator are screened, as is well known with these arrangements, the generator being so by means of the casing G.
  • the length of the Lecher wires should be a multiple of /4, 'y being the wavelength, it follows that the distance between wall R.
  • Wall R. and casing G are here connected with one another by a metallic structure V so as to be, in electrical relation, in the nature of a single body, wall R and easing or screening G thus being prevented from oscillating in dipole-fashion.
  • Structure V may be made of sheet metal, wire gauze or metal tapes connected to each other by well conductive means.
  • a transmitter for ultra-short wave oscillations comprising a generator, a shielding means enclosing said generator, a radiator, an energy line having a length of /4 or a multiple thereof and interconnecting saidgenerator and said radiator, a reflecting wall located between said shielding means and said radiator in close proximity to the radiator, and a further shielding device which directly connects the outer edges of said reflecting Wall and the outer edges of said first shielding means of the generator along straight lines so as to assemble said first shielding means of the generator and said reflecting wall into one single unit.

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Transmitters (AREA)
US106768A 1935-10-24 1936-10-21 Ultra-short wave transmitter Expired - Lifetime US2156051A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE464975X 1935-10-24

Publications (1)

Publication Number Publication Date
US2156051A true US2156051A (en) 1939-04-25

Family

ID=6540324

Family Applications (1)

Application Number Title Priority Date Filing Date
US106768A Expired - Lifetime US2156051A (en) 1935-10-24 1936-10-21 Ultra-short wave transmitter

Country Status (5)

Country Link
US (1) US2156051A (en, 2012)
BE (1) BE417995A (en, 2012)
FR (1) FR811924A (en, 2012)
GB (1) GB464975A (en, 2012)
NL (1) NL45915C (en, 2012)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3526928B2 (ja) * 1994-11-15 2004-05-17 株式会社ルネサスＬｓｉデザイン 非接触ｉｃカードシステム

Also Published As

Publication number Publication date
NL45915C (en, 2012)
BE417995A (en, 2012)
GB464975A (en) 1937-04-28
FR811924A (fr) 1937-04-26

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