US2505251A - Superheterodyne receiver for very short waves - Google Patents

Superheterodyne receiver for very short waves Download PDF

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Publication number
US2505251A
US2505251A US668538A US66853846A US2505251A US 2505251 A US2505251 A US 2505251A US 668538 A US668538 A US 668538A US 66853846 A US66853846 A US 66853846A US 2505251 A US2505251 A US 2505251A
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US
United States
Prior art keywords
systems
transmission line
local oscillations
short
oscillations
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
US668538A
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English (en)
Inventor
Knol Kornelis Swier
Strutt Maximiliaan Julius Otto
Ziel Aldert Van Der
Adelbert Van Weel
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Hartford National Bank and Trust Co
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Hartford National Bank and Trust Co
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.)
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Publication date
Application filed by Hartford National Bank and Trust Co filed Critical Hartford National Bank and Trust Co
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Publication of US2505251A publication Critical patent/US2505251A/en
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/14—Balanced arrangements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/14—Balanced arrangements
    • H03D7/1408—Balanced arrangements with diodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/54—Amplifiers using transit-time effect in tubes or semiconductor devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H2/00—Networks using elements or techniques not provided for in groups H03H3/00 - H03H21/00
    • H03H2/005—Coupling circuits between transmission lines or antennas and transmitters, receivers or amplifiers
    • H03H2/008—Receiver or amplifier input circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12—Neutralising, balancing, or compensation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference
    • H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus
    • H04B15/04—Reducing interference from electric apparatus by means located at or near the interfering apparatus the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder
    • H04B15/06—Reducing interference from electric apparatus by means located at or near the interfering apparatus the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder by local oscillators of receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/06—Answer-back mechanisms or circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L15/00—Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code
    • H04L15/04—Apparatus or circuits at the transmitting end
    • H04L15/22—Apparatus or circuits for sending one or a restricted number of signals, e.g. distress signals

Definitions

  • This invention relates to 'a superheterodyne-reoscillations aresuppliedin phase and the received' oscillations are supplicd-in'pnsh pull to the mixing tube via a tiinagble lecher wiresystern;
  • Figure 1 is a schematic diagram of circuit arrangement of theabove type
  • Figure 21 s a schematic diagram-of a circuit arrangement according to the invention.
  • FIG. 3 is a diagramshowing potential distribution in the circuit of Figure 2
  • Figure 5 is a schematicy diagram of a third circuit arrangement according to the invention.-
  • a receiver circuit arrangement of" the above" type is shown diagrammatically in Fig: l otthe' accompanying drawing;
  • the oscillations receivedby a dipole aerial. i, 2 are supplied'totwcsupplies the local oscillations.
  • the received" high-frequency "oscillations are consequently fed in push-pull and the local. oscillations are fed:
  • the two lecher-wires 3 and t willrjointly have. a high-frequency. voltage; .relatively to earth; havingthe frequency oiltheglocal oscillations, as a resultpoiwhicli.theundesired efiect occurs that the aerial system i; 2' emits the local oscillations.
  • this drawback is obviated by the oscillatorysystenr constitutedby the two leaner-wires together relatively to the surroundings having such. an electrical length that atthe place of the aerial, terminal a. potentializnode: for the local oscillations occursu Fig.
  • EIIlbOdlII'lfiIlt-Ofi-thfi invention ini'which the-IeCher-vvireS 3 i and A are elongated by:-parts I l and i2 and'the extremities arezcon nected-by -an..earthed short-circuit: bridge; it; the extension being chosen oi such: length thatthe stationary wave of the frequency of the local The conductors osci1lations;.. which occurs in the wires 3', H and i,- l2:ftogether; exhibits not? only a. potential node at thezextremity but-xalso one at'the connecting pointsrrof the: aerial i512 withtheconductors-S; 42 Underthese conditions the aerial l; 2* does'not emit the local oscillations;
  • Fig. .31 showsrth'evariation in potential of" the stationary wave.
  • point I 3 .whichicorresponds to: the earthedzconnection between the two' con ductors: l land 52;..a potential norle occurs: The electrical length. or. the: conductors" between the: points i; 2 and; i 3 is: soz 'chosen' that? also-in. point i; 2; Where the aerialiss connected; a; potential? riodeoccurs'. i
  • the-r lengtln of? thexwiresa i landf I29. may also be: shorter than; in the case shown if v a preferably variable: condenser is connectedi bet-- tween.;the..shortecircuit bridge I 3: andiearth.
  • The: desiredipotential node: atzthe point of theaerial: connection; may then be obtained by adjusting: this condenser 'toraisuitablewa'lue;
  • Fig:..5' shows anrembodiment oi'tlie invention ingwhich the lecherewiresi Brand 4, as before; are
  • a tuningof the ing it surrounding these wires. oscillatory system 1 constitutedby the two lechers wires. together relatively to thescreening; which.
  • occnrsfis obtained: by an earthed short-circuit: bridge; 5 ll: which? connects; thescreening; M to the; twovwires H1 and. 5 Land. isrslidablealong-theirs! side ofgtheiscreening iii-and along the-two lecher.
  • said elements of said systems means to short circuit said transmission line at a given point thereof to produce on said line a first voltage node of said local oscillations at said short circuit means and a second voltage node of said local oscillations at a point intermediate to said given point and said other elements of said systems, means to couple the other terminal of said local oscillator to said shorting means, an antenna system to receive desired signals, bridge means positioned intermediate to said short circuiting means and the other elements of said systems to tune the transmission line to the frequency of said desired signals, and means to connect said antenna system to said second point of voltage node of said local oscillations on said transmission line between said bridge means and said systems.
  • a receiver mixing ,circuit for very short Waves comprising a pair of electron discharge systems each having a cathode element and an anode electrode, a source of local oscillations having-two terminals, means to connect one of said terminals to the cathode elements of said discharge systems, a transmission line having two conductors, means to connect each of said conductors respectively to the anodes of said discharge systems, means to short circuit said transmission line at a given point thereof to produce on said line a first voltage node of said local oscillations at said short circuit means and a second voltage node of said local oscillations at a point intermediate to said given point and said anodes, means to couple the other terminal of said local oscillator to said shorting means, an antenna system to receive desired signals, bridge means positioned intermediate to said short circuiting means and said anodes to tune the transmission line to the frequency of said desired signals, and means to connect said antenna system to said second point of voltage node of said local oscillations on said transmission line between said bridge means and said anodes
  • a receiver mixing circuit for very short waves comprising a pair of unidirectional current carrying systems each having a cathode element and an anode element, a source of local oscillations having two terminals, means to connect one of said terminals to a corresponding element of each of said systems, a transmission line having two conductors, means to connect each of said conductors respectively to the other elements of said systems, means to short circuit said transmission line at a given point thereof to produce on said line a first voltage node of said local oscillations at said short circuit means and a second voltage node of said local oscillations at a point intermediate to said given point and said other elements of said systems, a conductive screen surrounding said transmission line and having one end thereof adjacent to said shorting means, means to couple said shorting means to the adjacent end of said screen, means to couple the other terminal of said local oscillator to said end' of said screen, an antenna system to receive desired signals, bridge means positioned intermediate to said short circuiting means and the other elements of said systems to tune the transmission line to the frequency of
  • 'A receiver mixing circuit for very short waves, comprising a pair ofunidirectional ourrent carrying systems each having a cathode element and an anode element, a source of local oscillations having two terminals, means to connect one of said terminals to a corresponding element of each of said systems, a transmission line having two conductors, means to connect each of said conductors respectively to the other elements of said systems, means to short circuit said transmission line at a given point thereof to produce on said line a first voltage node of said local oscillations at said'short circuit means and a second voltage node of said local oscillations at a point intermediate to said given point and said other elements of said systems, a conductive screen surrounding said transmission line and having one end thereof adjacent to said shorting means, a variable capacitor coupled between said shorting means and the adjacent end of said screen, means to couple the other terminal of said local oscillator to said end of said screen, an antenna system to receive desired signals, bridge means positioned intermediate to said short circuiting means and the other elements of said systems to tune
  • a receiver mixing circuit for very short waves comprising a pair of unidirectional current carrying systems each having a cathode element and an anode element, a source of local oscillations having two terminals, means to connect one of said terminals to a corresponding element of each of said systems, a transmission line having two conductors, means to connect each of said conductors respectively to the other elements of said systems, a conductive screen surrounding said transmission line, first movable bridge means to short circuit said transmission line and said screen at a given point thereof to produce on said line a first voltage node of said local oscillations at said first bridge means and a second voltage node of said local oscillations at a point intermediate to said given point and said other elements of said systems, means to couple the other terminal of said local oscillator to said first bridge means, an antenna system to receive desired signals, second movable bridge means positioned intermediate to said first bridge means and the other elements of said systems to tune the transmission line to the frequency of said desired signals, and means to connect said an tenna system to said

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Noise Elimination (AREA)
US668538A 1941-07-30 1946-05-09 Superheterodyne receiver for very short waves Expired - Lifetime US2505251A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL102359A NL60852C (enrdf_load_stackoverflow) 1941-07-30 1941-07-30

Publications (1)

Publication Number Publication Date
US2505251A true US2505251A (en) 1950-04-25

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ID=41667547

Family Applications (1)

Application Number Title Priority Date Filing Date
US668538A Expired - Lifetime US2505251A (en) 1941-07-30 1946-05-09 Superheterodyne receiver for very short waves

Country Status (5)

Country Link
US (1) US2505251A (enrdf_load_stackoverflow)
DE (1) DE885873C (enrdf_load_stackoverflow)
FR (1) FR884515A (enrdf_load_stackoverflow)
GB (1) GB609542A (enrdf_load_stackoverflow)
NL (1) NL60852C (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2562342A (en) * 1946-02-18 1951-07-31 Oliver I Steigerwalt Transmitter output coupling circuit
US2771548A (en) * 1952-07-08 1956-11-20 Polytechnic Res & Dev Co Inc Receiver tunable over v. h. f. and u. h. f. television bands
US2772355A (en) * 1951-07-05 1956-11-27 Polytechnic Res & Dev Co Inc Wide range tuner
US2931900A (en) * 1955-01-31 1960-04-05 David M Goodman Electrical testing
US3558969A (en) * 1967-12-13 1971-01-26 Philips Corp Electron discharge tube having an anode forming part of a lecher-line with a heat dissipating element

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE973679C (de) * 1952-07-25 1960-04-28 Telefunken Gmbh Schaltungsanordnung zur Unterdruckung der Ausstrahlung der Oberwellen eines Oszillators eines UKW-Empfaengers

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2011942A (en) * 1932-01-16 1935-08-20 Rca Corp Ultra short wave receiver
US2260840A (en) * 1939-08-19 1941-10-28 Gen Electric Temperature control system
US2260844A (en) * 1940-03-12 1941-10-28 Gen Electric Ultra high frequency converter
US2326801A (en) * 1938-09-22 1943-08-17 George E Pray High frequency tubes and circuits
US2382693A (en) * 1940-02-24 1945-08-14 Dallenbach Walter Oscillator-modulator circuit
US2389167A (en) * 1940-06-21 1945-11-20 Int Standard Electric Corp Lecher wire system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2052888A (en) * 1932-04-05 1936-09-01 Rca Corp Short wave signaling

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2011942A (en) * 1932-01-16 1935-08-20 Rca Corp Ultra short wave receiver
US2326801A (en) * 1938-09-22 1943-08-17 George E Pray High frequency tubes and circuits
US2260840A (en) * 1939-08-19 1941-10-28 Gen Electric Temperature control system
US2382693A (en) * 1940-02-24 1945-08-14 Dallenbach Walter Oscillator-modulator circuit
US2260844A (en) * 1940-03-12 1941-10-28 Gen Electric Ultra high frequency converter
US2389167A (en) * 1940-06-21 1945-11-20 Int Standard Electric Corp Lecher wire system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2562342A (en) * 1946-02-18 1951-07-31 Oliver I Steigerwalt Transmitter output coupling circuit
US2772355A (en) * 1951-07-05 1956-11-27 Polytechnic Res & Dev Co Inc Wide range tuner
US2771548A (en) * 1952-07-08 1956-11-20 Polytechnic Res & Dev Co Inc Receiver tunable over v. h. f. and u. h. f. television bands
US2931900A (en) * 1955-01-31 1960-04-05 David M Goodman Electrical testing
US3558969A (en) * 1967-12-13 1971-01-26 Philips Corp Electron discharge tube having an anode forming part of a lecher-line with a heat dissipating element

Also Published As

Publication number Publication date
GB609542A (en) 1948-10-04
FR884515A (fr) 1943-08-19
DE885873C (de) 1953-08-10
NL60852C (enrdf_load_stackoverflow) 1947-05-16

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