US1723461A - Ettore bellini - Google Patents

Ettore bellini Download PDF

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Publication number
US1723461A
US1723461A US1723461DA US1723461A US 1723461 A US1723461 A US 1723461A US 1723461D A US1723461D A US 1723461DA US 1723461 A US1723461 A US 1723461A
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US
United States
Prior art keywords
loop
coil
inductance
ground
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
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English (en)
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • G01S3/04—Details
    • G01S3/12—Means for determining sense of direction, e.g. by combining signals from directional antenna or goniometer search coil with those from non-directional antenna
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • G01S3/04—Details
    • G01S3/06—Means for increasing effective directivity, e.g. by combining signals having differently oriented directivity characteristics or by sharpening the envelope waveform of the signal derived from a rotating or oscillating beam antenna
    • G01S3/065—Means for increasing effective directivity, e.g. by combining signals having differently oriented directivity characteristics or by sharpening the envelope waveform of the signal derived from a rotating or oscillating beam antenna by using non-directional aerial
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • G01S3/04—Details
    • G01S3/08—Means for reducing polarisation errors, e.g. by use of Adcock or spaced loop antenna systems
    • G01S3/085—Means for reducing polarisation errors, e.g. by use of Adcock or spaced loop antenna systems by using spaced loop aerial systems

Definitions

  • One object of this invention is to provide a radio gouiometer in which an antenna of the loop or coil type serves the combined functions of a coil and a vertical antenna.
  • a further object is to modify the directional characteristics of a coil type antenna in such manner that the sense of direction of incoming electrical waves may be determined.
  • a further object is to provide a stopper circuit in connection with the loop, so arranged that the loop itself serves as the self-inductance coil of the stopper circuit.
  • a still further object is to provide two stopper circuits. for the antenna current, these circuits being symmetrical or balanced with respect to the loop and the ground connection.
  • Fig. 1 shows the coil and connection used in the above French patent and additions thereto, and
  • Fig. 2 shows diagrammatically the loop and connection used in the present invention.
  • a stopper circuit between the middle point (C), of the loop and ground, said stopper circuit consisting of the condenser (Ce) connected in parallel with the inductance coil (A), together with a variable resistance (R), inserted between the inductance and the ground.
  • the point (d) of the loop condenser (D) is connected with the grid of any suitable amplifier (7)), the filament battery of said amplifier being connected to ground as shown.
  • the coils (0) represent the inductance of the coil or loop, or they may be extra induc tances added in the coil or loop.
  • One hori zontal side of the coil or loop is comprised of the inductance coil (L).
  • variable condenser (Cd) is connected and between the midpoint of the coil (L) and ground a variable resistance (R) is inserted.
  • a switch (8) is inserted in the wire which connects the midpoint (CZ) directly with the ground as shown.
  • a variable condenser nected across the vertical limbs of the loop (T) is conand one plate of the condenser is connected to the grid of amplifier (7)) as shown.
  • the switch is closed, when the loop is used to determine the line of direction of the incoming signal.
  • the loop since the midpointof the loop is directly grounded, the loop has no eltect as a vertical antenna and the sense of direction from which the incoming wave is coming may not be determined.
  • the switch (.9) 1S opened and the stopper c1rcu1t tuned by the condenser
  • the antenna effect of the loop now comes into play, and by suitably varying the resistance (R), the antenna effect may be varied, so that the antenna effect and the loop effect neutralize each other and produce a oint v.
  • the inductance (L) will usually be chosen to have a large value com pared to the inductance of the loop itself or to the loop taken in connection with the inductance of the coil (0).
  • a radiogoniometer In a radiogoniometer, a loop circuit tuned to, incoming signals, and inductance connected in parallel with said loop circuit, a variable resistance connecting the midpoint of said inductance to ground, and a variable condenser connected between the midpoint of the loop and that of the in ductance.
  • a radiogoniometer a loop antenna, a condenser for tuning said loop to incoming ,waves, an inductance coil connected in par allel with said loop, a variable condenser connected between the midpoints of the loop and the inductance coil, an adjustable resistance connected-between the midpoint of said coil and; the ground, and. an-amplifier tube having its grid connected to one plate of the loop tuning condenser and also having its filament connected to ground.
  • variable condenser connected between the midpoint of the loop and that of the in ductance.
  • a radiogoniometer including thermionic tubes and filament heating batteries therefor, a loop antenna having a tuning condenser in series therewith, means for electrically balancing said loop including a grounded connection to the midpoint of the loop and also to the filament heating battery, and means for unbalancing the loop to obtain unidirectional elfects including an inductance coil connected across the loop, a variable condenser connected between the midpoints of the loop and. the coil for varying the amount of unbalance, and an adjustable resistance connecting the midpoint of said coil to ground.
  • a uni-directional antenna system comprising a loop circuit having means for tuning to incoming signals, an inductance-connected in parallel with said loop circuit, a variable condenser connected between the midpoints of said loop and said inductance, an adjustable resistance connecting the midpoint of said inductance to ground, and a switch shunting said condenser and resist ance, the arrangement being such that when said switch is closed and the loop rotated until maximum signals are obtained, the plane of the loop will indicate the line of direction of the source of incoming signals, and when rotated to the point of minimum signal the absolute direction will be determined.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Coils Or Transformers For Communication (AREA)
US1723461D Ettore bellini Expired - Lifetime US1723461A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB111907D DE417134C (de) Radiowinkelmesser

Publications (1)

Publication Number Publication Date
US1723461A true US1723461A (en) 1929-08-06

Family

ID=6993062

Family Applications (1)

Application Number Title Priority Date Filing Date
US1723461D Expired - Lifetime US1723461A (en) Ettore bellini

Country Status (6)

Country Link
US (1) US1723461A (fr)
BE (1) BE340848A (fr)
DE (1) DE417134C (fr)
FR (1) FR567587A (fr)
GB (1) GB217585A (fr)
NL (1) NL17451C (fr)

Also Published As

Publication number Publication date
GB217585A (en) 1925-01-08
NL17451C (fr)
FR567587A (fr) 1924-03-05
BE340848A (fr)
DE417134C (de) 1925-08-07

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