US1644906A - Frame aerial and the like - Google Patents

Frame aerial and the like Download PDF

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Publication number
US1644906A
US1644906A US99943A US9994326A US1644906A US 1644906 A US1644906 A US 1644906A US 99943 A US99943 A US 99943A US 9994326 A US9994326 A US 9994326A US 1644906 A US1644906 A US 1644906A
Authority
US
United States
Prior art keywords
turns
aerial
tuned
wave length
frame
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
US99943A
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English (en)
Inventor
Willans Peter William
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US1644906A publication Critical patent/US1644906A/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
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

Definitions

  • This invention relates to frame and other closed aerials and the like and has for its object the provision of a closed aerial which will be adapted to minimize interference from any station operating on a higher Wave length than that being received.
  • the invention is thus particularly useful in connection with receiving sets operating on the wellknown superheterodyne principle, since. it
  • the aerial has a part only of its winding shunted by a tuning condenser, the remaining part or parts being connected, in series with the tuned part, in the external circuit (say the grid filament circuit).
  • the tuned and untuned parts of the frame aerial are so connected and proportioned that the sum of the electromotive forces induced in them by transmitting stations is zero.
  • the voltage produced across the terminals of the frame aerial will be equal to the voltage drop due to the current flowing in the tuned part.
  • the latter will be negligibly small for wave lengths greatly in excess of the natural wave length of the tuned part and in this case the interference will be cancelled out.
  • Figure 1 a frame aerial 1 having a solenoidal winding of say twelve turns, six of which 1 are wound in a right handed helix and shunted by a tuning condenser 2, and the remaining six 1 in a left handed helix but not tuned.
  • the two sets of six turns are connected together in series 99,943, and in Great Britain April 7, 1925.
  • the electromotive force inducedrin the turns 1 by any signal is equal and opposite to that induced in the turns 1 by the same signal.
  • the aerial transmits impulses to the valve 3 as a result of signals on a wave length to which the turns 1 are tuned but does not. substantially transmit impulses as a result of signals on a Wave length considerably higher than that to which said turns 1 are tuned.
  • a frame or other closed aerial having its winding so arran ed that the electromotive force induced y anysignal in one part thereof opposes that induced by the same signal in another part thereof, and having "only a part thereof shunted by means of a tuning condenser, the arrangement bemg such that signals on a wave length equal to that to which saidfshunted part is tuned "will set up substantial voltages across the terminals of the aerial and that signals on a wave length greater than that to which said shunted part is tuned will set up nosuh- 'sta'ntial voltage across said terminals.
  • a frame or other closed aerial having its winding so arranged that the electromo tive force induced by any signal in one part thereof opposes that induced by the same signal in another part thereof, and having one of said parts only shunted by meansof a tuning condenser, the arrangement being such that signals on a wave length equal to that to which said shunted part is tuned will set up very much greater voltages across said shunted part than across said nonshuntedpart and that signals on a wave length greater than that to which said shunted part is tuned will set up suhstan t-ially equal and opposite voltages across said 7 shunted an dnonshunted parts.

Landscapes

  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
US99943A 1925-04-07 1926-04-05 Frame aerial and the like Expired - Lifetime US1644906A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9288/25A GB254036A (en) 1925-04-07 1925-04-07 Improvements in, or relating to, frame aerials and the like

Publications (1)

Publication Number Publication Date
US1644906A true US1644906A (en) 1927-10-11

Family

ID=9869083

Family Applications (1)

Application Number Title Priority Date Filing Date
US99943A Expired - Lifetime US1644906A (en) 1925-04-07 1926-04-05 Frame aerial and the like

Country Status (4)

Country Link
US (1) US1644906A (enrdf_load_stackoverflow)
BE (1) BE333741A (enrdf_load_stackoverflow)
FR (1) FR614144A (enrdf_load_stackoverflow)
GB (1) GB254036A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3018373A (en) * 1958-07-10 1962-01-23 Texas Instruments Inc Antenna coupling circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3018373A (en) * 1958-07-10 1962-01-23 Texas Instruments Inc Antenna coupling circuit

Also Published As

Publication number Publication date
BE333741A (enrdf_load_stackoverflow)
GB254036A (en) 1926-07-01
FR614144A (fr) 1926-12-07

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