US1931864A - Radio transmitting system - Google Patents

Radio transmitting system Download PDF

Info

Publication number
US1931864A
US1931864A US451330A US45133030A US1931864A US 1931864 A US1931864 A US 1931864A US 451330 A US451330 A US 451330A US 45133030 A US45133030 A US 45133030A US 1931864 A US1931864 A US 1931864A
Authority
US
United States
Prior art keywords
winding
circuit
choking
windings
source
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
US451330A
Other languages
English (en)
Inventor
Gerth Felix
Kramar Ernst
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 US1931864A publication Critical patent/US1931864A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/04—Modulator circuits; Transmitter circuits
    • 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
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves

Definitions

  • One of these'choking coils is prelim-' inarily magnetized with an additional winding.
  • That circuit comprising the preliminarily magne-,
  • Figures 2a and 2b arediagrammatic views of the direct current windings of the choking coils.
  • the high frequency energy is supplied from the transmitting apparatus to thekey-instrument by way of the inductance L1.
  • An additional inductance L2 is coupled with L1 to which two circuits are connected, which are each in connection "with a directing system. It is immaterial here, whether'a'single directing aerial is concerned or a voluminous system of direct: ingaerials.
  • One of the branches (I) is formed by L2, the capacity C1, the inductance L3 (C1 and 1e are arranged for tuning purposes), L4, 02, L6 and the winding W1 of the choking coil DTl.
  • the other branch (II) consists of the elements L2, C1,'L3, Ls, .Cs, Ls and'WQ.
  • the systems of aerials are coupled withthe inductivities L4 and Lsby. way of L1 and L8.
  • the choking coils are provided with iron cores, upon which additional windings are wound; Both the key; windings W3 and W4 on the choking coil DTl and DTz respectively are connected in series by the interposition of the key T, which in a given case may at the same time be utilized for transmitting'the signals, and in the circuit of said device is situated the source B of direct current.
  • the choking coil D72 in addition is provided with a permanent magnetizing winding W5, which is directly connected withthe battery B through the interposition of a regulating resistance.
  • the mode of action of the arrangement is as follows. If the key T is open, the choking coil DT2 is preliminarily magnetized by means of the permanent magnetizing winding W5, that is to say, in consequence of the small inductive resistance of the choking coil Drz the high frequency energy emitted by the transmitting device is supplied through'the circuit II to the system of aerials connected at L8. The system of aerials connected at L7 receives no energy at that moment, since the choking coil DH is under no preliminary magnetization. As' soon as the key T is depressed a direct current will flow through the windings W3 and W4. Bythis means the choking coil Dn is magnetized and the transfer of high frequency energy is, effected by the circuit I, since at the same time the permanent magnetizing current in the choking coil Drz gener- 1 coil will'remain active.
  • the windings of thechoking coils must beparticularly adapted for that purpose.
  • the choking coil DH is provided with a compensating winding consisting of two halves,
  • circuits I and II are tuned between the points of their connection, that is tosay those parts of the circuits, which are not formed in common by L2, C1, L3 by means of condensers C2 and C3 respectively to the frequency supplied,
  • the least possible voltage which-correspondsto the value of prising a keying device so inductively coupled to said coupling circuits thatupon closure or openingof the contact of said device the impedances of said coupling circuits are varied oppositely.
  • each circuit contains a' choke coil having a core
  • said means includes a winding on one choke coil core connected in circuit with a source of direct current, a winding on each choke coil core connected in series, and a circuit closer to close circuit from said source of direct current through the serially connected windings in a direction whereby said two windings on the same core are rendered differential in their effect upon said core.
  • a radio transmitting system comprising two antennaaa source of radio frequency, a coupling circuit for each antenna coupling, it to said source, a choke coil having a core for each coupling circuit having a winding thereon, one of the choke core coils having a second winding connected in circuit with a source of direct current and a third winding connected to said direct current source and differentially with respect to said second winding, and said other choke core coil having a second winding connected in series with said third winding, and a circuit closer arranged to open and close circuit from said direct current source through said serially connected windings.
  • a radio transmitting system comprising two antennae, a source of radio frequency energy, coupling circuits between said source and said antenna, and means to render said coupling circuits alternatively effective to transfer energy to either of said antennae before effective transfer of energy to the other is interrupted, said means comprising a keying device so inductively coupled to the said coupling circuits that upon operation thereof the impedance of one circuit is increased whilst that of the other isdecreased,
  • a radio transmitting system comprising two antennae, a source of radio frequency energy, coupling circuits between said source and said antennae which normally prevent the radio fre quency energy from being simultaneously and effectively transferred to said antennae, and means to render said coupling circuits alternatively effective to transfer energy to one or the other of said antenna, said means comprising a keying device so inductively coupled to said coupling circuits that upon closure of the contact of said device the impedance of one coupling circuit is decreased whilst the impedance of the other coupling circuit is increased.
  • a radio'transmitting system comprising two antenna, a source of radio frequency energy, coupling, circuits between said source and said antennae, each coupling circuit being formed by a path individual thereto and a path common to the two circuits and each path containing inductance and capacity tunable to the frequency of said source, and means to render said coupling circuits alternately effective to transfer energy to one or the other of said antennae, said means comprising a keying device so inductively coupled to said individual paths that upon the opening of the contact of said device one coupling circuit is rendered operative for transfer of energy whilst simultaneously the other coupling circuit is rendered efiectively' inoperative for transfer of FELIX GERTH. ERNST KRAMAR.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Magnetic Treatment Devices (AREA)
  • Transmitters (AREA)
US451330A 1929-06-06 1930-05-10 Radio transmitting system Expired - Lifetime US1931864A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1931864X 1929-06-06

Publications (1)

Publication Number Publication Date
US1931864A true US1931864A (en) 1933-10-24

Family

ID=7750013

Family Applications (1)

Application Number Title Priority Date Filing Date
US451330A Expired - Lifetime US1931864A (en) 1929-06-06 1930-05-10 Radio transmitting system

Country Status (4)

Country Link
US (1) US1931864A (fr)
FR (1) FR694678A (fr)
GB (1) GB353476A (fr)
NL (1) NL31476C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3188568A (en) * 1961-12-05 1965-06-08 Marelli Lenkurt S P A Arrangement for tuning of the transmitting antenna of a data transmission system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3188568A (en) * 1961-12-05 1965-06-08 Marelli Lenkurt S P A Arrangement for tuning of the transmitting antenna of a data transmission system

Also Published As

Publication number Publication date
FR694678A (fr) 1930-12-06
GB353476A (fr) 1931-07-24
NL31476C (fr)

Similar Documents

Publication Publication Date Title
US2382693A (en) Oscillator-modulator circuit
US2385673A (en) Carrier current system
US1931864A (en) Radio transmitting system
US2596013A (en) Transmitting and receiving circuits for inductive carrier communication systems
US2928008A (en) Signal lockout device used in telephone exchange system or the like
US1807759A (en) Prevention of parasitic oscillations
US4995054A (en) Data transmission using switched resonance
US1462038A (en) Modulating system
US1888280A (en) Reduction of interference
US1888427A (en) Polarized relay
US1418066A (en) Rabiotraitsmitting system
US1815976A (en) Coupling between carrier and transmission lines
JPS62136145A (ja) １：ｎデ−タ伝送方式
US1578490A (en) Apparatus for preventing interference in radiosignaling
US1425523A (en) Transmission system for radiant energy
US2854665A (en) Duplex radio communication systems
US1517816A (en) Radio transmitting system
US1464088A (en) Electromagnetic device
US1581264A (en) Radio signaling system
US1512960A (en) Radio signaling system
US1904517A (en) Duplex system of telephony
US1506736A (en) Signaling system
US1579921A (en) Multiplex radio system
US1673009A (en) Antenna-circuit arrangement
US1833735A (en) Radio signaling system