US2106776A - Receiving system - Google Patents

Receiving system Download PDF

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Publication number
US2106776A
US2106776A US7803A US780335A US2106776A US 2106776 A US2106776 A US 2106776A US 7803 A US7803 A US 7803A US 780335 A US780335 A US 780335A US 2106776 A US2106776 A US 2106776A
Authority
US
United States
Prior art keywords
circuit
conductors
frequency
drum
tuned
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
US7803A
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English (en)
Inventor
Trevor Bertram
George Ralph Waldo
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.)
RCA Corp
Original Assignee
RCA Corp
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 RCA Corp filed Critical RCA Corp
Priority to US7803A priority Critical patent/US2106776A/en
Priority to FR802098D priority patent/FR802098A/fr
Priority to GB5567/36A priority patent/GB454831A/en
Application granted granted Critical
Publication of US2106776A publication Critical patent/US2106776A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H04B1/16—Circuits
    • H04B1/26—Circuits for superheterodyne receivers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/18—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance
    • H03B5/1817—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a cavity resonator
    • H03B5/1835—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a cavity resonator the active element in the amplifier being a vacuum tube
    • 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
    • H03D7/1416—Balanced arrangements with discharge tubes having more than two electrodes
    • 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
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/16—Automatic frequency control where the frequency control is accomplished by mechanical means, e.g. by a motor

Definitions

  • the present invention relates to radio receiving systems, and particularly to systems which a re adapted Ato receive ultra short Wave energy.
  • One of the objects of the present invention is to provide a highly eicient and simple ultra short Wave radio receiver.
  • Another object is to provide an improved radio frequency tuned oscillatory circuit having low loss.
  • a further object is to provide a receiver characterized by high frequencystability and capable of receiving signals having wide band modulation.
  • the oscillatory circuit comprises a low loss, radiationless, concentric arrangement having inner and outer concentric tubes which are coupled together at both of their adjacent ends.
  • the -O preferred arrangement there is provided, within the inner cylindrical tube, two spaced rods for receiving the collected energy, each rod being surrounded for a portion of its length by a hollow, concentrically arranged, cylindrical metallic element.
  • An adjustable cylindrical ring located between the inner surface of the outer tube and outer surface of the inner tube serves to vvary the constants of the oscillatory circuit.
  • At one end ofthe inner conductor there is provided a lumped capacity in the form of /a drum which couples this end with the outer conductor.
  • this tuned vcircuit comprises a pair of parallel wires conductively coupled together at one end and ca'- pacitively coupled together at their other end, l) but it is to be understood, of course, that any other type of tuned circuit-such as a condenser, coil combination or another concentric low loss alair may replace the parallel wire tuned circuit.
  • Fig. 1 shows applicants preferred embodiment of a complete radio receiving systemyand Fig. 1a shows a cross-sectional view of the conthe novel oscillatory circuit employed for resonat- ⁇ (Cl. 25d-2m centric, low loss oscillatory arrangement of Fig. 1, along the lines .li-A.
  • modulated high frequency energy picked up upon antenna. 2 is fed through transmission line d to the tunable trap circuit 6 having the adjustable tuning condenser 8.
  • the transmission line d is variably connected. ⁇ or tapped to the sides lll, l2 of the tuned circuit ,6 at points I6, l5, preferably so chosen that the impedance at points i6, i6 matches the surge impedance of the transmission line 4.
  • the conductors lli, l2 of the tuned circuit 6 are substantially linear and are of low loss conductance as is also the bridging conductor I8 grounded at its midpoint by connection 20.
  • the resonated energy from tuned circuit lv is conductively fed on to metallic rods 26, 28 conductiv-ely connected to the end plate 30 of outerv rods 26, 28.
  • metallic rods 26, 28 conductiv-ely connected to the end plate 30 of outerv rods 26, 28.
  • metallic tube 34 conductively connected to the metallic end plate 30.
  • metallic tube 36 also connected to the end plate 30.
  • tubes 36, 36 is a further metallic pipe or y tube 38 which is also in conductive connection with end plate 39.
  • a doughnut or cylindrical metallic end ring @d which may be provided with ears d protruding through slots in the metallic walls 32, whereby the ring fi may be moved at Will along the tube 3d.
  • ring Q0 is in intimate frictional metallic contact with the inner surface of the outer conductor tube 32 and the outer surface of. tube or pipe 33.
  • the exterior of the outer conductor tube 32 is'grounded, as shown.
  • Fig. la shows a cross sectional view of the low loss concentric tube oscillatory arrangement along the line A-A.
  • an innerdrum 58, 68 At the right hand end of tube 38 there is mounted an innerdrum 58, 68. y
  • the ring 48 is scadjusted that the capacity between the inner drum 58, 68 and thel wall 32 and end plate 62 resonates with the linductance of the pipe 38 between the right-hand surface 64 of ring 48 and the inner drum end 68, at a desired frequency of operation for the local oscillation generator 66 the latter being provided with a suitably tuned plate circuit 68 also tuned to the desired local heterodyne frequency.
  • the capacity between drum 68, 58 and 62, 32 was approximately .0002 microfarad for a frequency of 80.3 megacycles.
  • Rods 26, 28 are purposely made longer than the length 38 locatedbetwleen sides 64 and 68 in order to build up an impedance ashigh as possible consistent with the resistance loading imposed by the grids 48, 58 of detectors 52, 54. At the desired dimensions, the resistance loading imposed by the grids 48, 58 will approxil mately match the impedance of rods 26, 28.
  • oscillatory circuit 64, 38, 68, 32 is equivalent to the well known concentric, radiationless, low -loss tuned circuit comprising inner.
  • a tuned circuit 141s provided for the output of the detector tubes 52, 54 and may be tuned, for example, to 11.5 megacycles when the local oscillation generator 66 is suitably tuned to produce such a beat with the 91.8 megacycle incoming wave picked up on the antenna 2. All the higher frequencies, such as the high beat frequency which is the sum of the two frequencies supplied to detectors 52, 54, the original signal frequency, and any oscillatory frequency due to unbalance'in the plate circuit of the detectors are attenuated and 'thus prevented from entering the circuit 14 by means of choke coils 16, 18
  • inductors 16, 18 offer a low impedance to the desired beat frequency, which is produced by plate rectification, but relatively high impedance to the higher beat produced during the heterodyning process.
  • the entire outer surface 38, 32, 62 of the outer drum is-at rground radio frequency potential and hence the cathode by-passing condensers may be connected directly thereto as shown in the drawing.
  • the grid of the local oscillator 66 is connected to a point 84 on the inner drum surface ⁇ 58, generation taking place by virtue of feedback through the interelectrode capacity of the tube 66 which will be found amply high for the wave lengths involved.
  • the inductance of the beat frequency output circuit 14 is formed by two coils 88, 98 effectively connected together for highfrequency currents by condenser 92 and veffectively grounded at that connection point through the. intermediary of condensers '94. symmetrically coupled to the coils 88, 98 is the coil 96 connected to transmission line 98 feeding the beat frequency energy into an intermediate vfrequency band amplifier
  • 88 is fed into a further detector
  • 86 may be, for
  • 86 may then be fed into the succeeding amplifiers and detector equipment
  • 81 is supplied to frequency control apparatus
  • 09 may be of any type known in the art and preferably comprises relay equipment in thev nature of a dierential solenoid HG and an electromagnetic device in the output of two electron discharge tubes ill, llt, whereby an increase in current through one tube will result in an increase in current through the upper portion of the solenoid and a decrease through the lower portion, or vice versa, causing the armature I I9 to be moved upwardly or downwardly, as the case may be.
  • I' relay equipment in thev nature of a dierential solenoid HG and an electromagnetic device in the output of two electron discharge tubes ill, llt, whereby an increase in current through one tube will result in an increase in current through the upper portion of the solenoid and a decrease through the lower portion, or vice versa, causing the armature I I9 to be moved upwardly or downwardly, as the case may be.
  • 26 is linked to variable condenser l2 by meansvof gears
  • 21 comprising a red lamp and a green lamp to indicate which way frequency compensation-is being made by the automatic frequency control apparatus its.
  • 28, 29 are conductively connected at one cf their ends to leads H0, lli respectively, and at their other ends to ground, whereby the application of potential to one of the leads il!! or til will cause the energization of the associated relay
  • the concentric tuned oscillatory circuit has been described with particular refer-I ence to an input stage. It is to be distinctly under-- stood that the invention is not limited in this respect since the oscillatory circuit may also be used as an output coupling stage, if desired; such a coupling stage may be used between two succeeding electron discharge device circuits. It will thus be evident that various changes may be made in the form, shape and arrangement of the various elements-of the invention to meet condi tions encountered in their use without depart- -ing from the spirit and scope of the appended claims. 1t will also be understood that the concentric tubular inner and outer conductor arrangement is not limited to a conductive coupling at one end since a capacitive coupling at that end would also serve the purpose of the invention..
  • Li The combination with an ultra high frequency oscillatory circuit comprising inner and outer concentric tubular ⁇ conductors conductively coupled together at one end and capacitively coun pled together at their other end, said capacitive coupling comprising a hollow metallic drum electrically connected to and mounted on said inner,
  • tubular conductor of two spaced conductors i within and separated from said inner tubular conductors, said spaced conductors extending into the interior of said hollow drum and adapted to have potentials thereon which vary in accordance with variations in potential of saidV drum, a high frequency input circuit, means for adjustably coupling said input circuit to said spaced conductors near the ends thereof which are farthest removedfrorn said hollow drum,an
  • saidcapacitive coupling comprising a hollow metallic drum electrically connected to and mounted on said inner tubular conductor, of two vspaced. conductors within and separated from said inner tubular conductors, said spaced conductors extending into the interior of said hollow drum and adapted to have potentials thereon which vary lin accordance with Variations in-potential of said drum, a high frequency input circuit, means for adjustably coupling said input circuit to said spaced conductors near the ends thereof which are farthest removed from said hollow drum, said input circuit comprising another tuned circuit composed of a pair of parallel wires directly connected together at one end and capacitively coupled together at their other end, and a connec- -tion individual to each of said wires and coupling same to one of said spaced conductors, each connection being'individual to one of said spaced conductors, an output circuit 'in .the form of a pair of electron discharge devices having control grids connected to the other ends of said spaced conductors,I and means for suitably en
  • the combination 'with an ultra high frequency oscillatory circuit comprising concentric inner and outer tubular conductors capacitively coupled together at one end and conductively or capacitively coupled together at their other end, of a pair of spaced conducting rods extending throughout the length of and within said inner tubular conductor, a high frequency input circuit coupled to said rods near one end .thereof and a detector circuit coupled to said rods at or near the vother end thereof, means for enabling variations in potential of said innery conductor to produce corresponding variations on said pair of spaced rods, and an electron discharge device oscillator having a control electrode coupled tov vice'oscillator having tuned input and output.
  • an ultra shot wave heterodyne receiver means ⁇ ifor collecting radiat nergy, a local oscillator, and a detector circuit coupled to said means and said oscillator for producing a beat frequency between said collected energy and the oscillations produced by said local oscillator, the coupling between said detector circuit and said means comprising two pairs of parallel conductors, each pair being directly connected together at one end and capacitively coupled together at their other end, and a connection from each conductor oi one pair of parallel conductors to a conductor of the other pair.
  • connections between the pairs of parallel conductors are adjustably movable over said conductors.
  • An ultra high frequency oscillatory circuit between, adjustable means between said inner and said outer conductor for varying said capacitive coupling, and means intermediate the ends of said conductors for. adjustably coupling said conductors together at points along the lengths of said conductors.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Selective Calling Equipment (AREA)
US7803A 1935-02-23 1935-02-23 Receiving system Expired - Lifetime US2106776A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US7803A US2106776A (en) 1935-02-23 1935-02-23 Receiving system
FR802098D FR802098A (fr) 1935-02-23 1936-02-15 Système radio-récepteur
GB5567/36A GB454831A (en) 1935-02-23 1936-02-24 Improvements in or relating to high frequency signalling apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US7803A US2106776A (en) 1935-02-23 1935-02-23 Receiving system

Publications (1)

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US2106776A true US2106776A (en) 1938-02-01

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US7803A Expired - Lifetime US2106776A (en) 1935-02-23 1935-02-23 Receiving system

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US (1) US2106776A (fr)
FR (1) FR802098A (fr)
GB (1) GB454831A (fr)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2462856A (en) * 1942-05-19 1949-03-01 Sperry Corp Transmitter and/or receiver circuits
US2464818A (en) * 1943-05-27 1949-03-22 Sperry Corp Frequency control system
US2469222A (en) * 1943-12-01 1949-05-03 Rca Corp Crystal rectifier converter
US2473535A (en) * 1941-04-04 1949-06-21 Sperry Corp Switching and modulation system
US2476803A (en) * 1943-09-22 1949-07-19 Westinghouse Electric Corp High stability receiver circuit
US2479537A (en) * 1942-12-30 1949-08-16 Gen Electric Detector-oscillator circuit for ultra high frequency receivers
US2516990A (en) * 1942-09-14 1950-08-01 Rca Corp Ultra high frequency mixer circuits
US2537139A (en) * 1944-07-14 1951-01-09 Bell Telephone Labor Inc Object locator system
US2582726A (en) * 1943-03-27 1952-01-15 Hartford Nat Bank & Trust Co Mixing circuit arrangement
US2591982A (en) * 1941-07-30 1952-04-08 Hartford Nat Bank & Trust Co Superheterodyne receiver for very short waves
US2647994A (en) * 1943-12-04 1953-08-04 Us Navy Automatic frequency control in pulse transmission systems
US2756393A (en) * 1952-10-03 1956-07-24 Philco Corp Constant bandwidth coupling system
US2802908A (en) * 1953-12-18 1957-08-13 Collins Radio Co Automatic tuning means
DE969565C (de) * 1940-10-02 1958-06-19 Pintsch Bamag Ag Einrichtung zur UEberwachung der von einem Ultrakurzwellengenerator mit Hohlraumresonator erzeugten Schwingungen
DE1108824B (de) * 1956-06-18 1961-06-15 Siemens Ag Durchstimmbares, mehrkreisiges Filter fuer sehr kurze elektromagnetische Wellen
US2989627A (en) * 1952-08-09 1961-06-20 Itt Television receiver with ultra high frequency cavity tuner inside very high frequency turret tuner
DE1268287B (de) * 1956-09-12 1968-05-16 Siemens Ag Abstimmbarer Filterkreis
US7554500B1 (en) * 2007-04-02 2009-06-30 Sergi Paul D Tuning circuit for a trap antenna

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE969565C (de) * 1940-10-02 1958-06-19 Pintsch Bamag Ag Einrichtung zur UEberwachung der von einem Ultrakurzwellengenerator mit Hohlraumresonator erzeugten Schwingungen
US2473535A (en) * 1941-04-04 1949-06-21 Sperry Corp Switching and modulation system
US2591982A (en) * 1941-07-30 1952-04-08 Hartford Nat Bank & Trust Co Superheterodyne receiver for very short waves
US2462856A (en) * 1942-05-19 1949-03-01 Sperry Corp Transmitter and/or receiver circuits
US2516990A (en) * 1942-09-14 1950-08-01 Rca Corp Ultra high frequency mixer circuits
US2479537A (en) * 1942-12-30 1949-08-16 Gen Electric Detector-oscillator circuit for ultra high frequency receivers
US2582726A (en) * 1943-03-27 1952-01-15 Hartford Nat Bank & Trust Co Mixing circuit arrangement
US2464818A (en) * 1943-05-27 1949-03-22 Sperry Corp Frequency control system
US2476803A (en) * 1943-09-22 1949-07-19 Westinghouse Electric Corp High stability receiver circuit
US2469222A (en) * 1943-12-01 1949-05-03 Rca Corp Crystal rectifier converter
US2647994A (en) * 1943-12-04 1953-08-04 Us Navy Automatic frequency control in pulse transmission systems
US2537139A (en) * 1944-07-14 1951-01-09 Bell Telephone Labor Inc Object locator system
US2989627A (en) * 1952-08-09 1961-06-20 Itt Television receiver with ultra high frequency cavity tuner inside very high frequency turret tuner
US2756393A (en) * 1952-10-03 1956-07-24 Philco Corp Constant bandwidth coupling system
US2802908A (en) * 1953-12-18 1957-08-13 Collins Radio Co Automatic tuning means
DE1108824B (de) * 1956-06-18 1961-06-15 Siemens Ag Durchstimmbares, mehrkreisiges Filter fuer sehr kurze elektromagnetische Wellen
DE1268287B (de) * 1956-09-12 1968-05-16 Siemens Ag Abstimmbarer Filterkreis
US7554500B1 (en) * 2007-04-02 2009-06-30 Sergi Paul D Tuning circuit for a trap antenna

Also Published As

Publication number Publication date
FR802098A (fr) 1936-08-26
GB454831A (en) 1936-10-08

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