GB454831A - Improvements in or relating to high frequency signalling apparatus - Google Patents

Improvements in or relating to high frequency signalling apparatus

Info

Publication number
GB454831A
GB454831A GB5567/36A GB556736A GB454831A GB 454831 A GB454831 A GB 454831A GB 5567/36 A GB5567/36 A GB 5567/36A GB 556736 A GB556736 A GB 556736A GB 454831 A GB454831 A GB 454831A
Authority
GB
United Kingdom
Prior art keywords
frequency
circuit
coupled
tuned
local oscillator
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
Application number
GB5567/36A
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co Ltd
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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB454831A publication Critical patent/GB454831A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Selective Calling Equipment (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

454,831. Wireless receiving-apparatus. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London.-(Assignees of Trevor, B., and George, R. W. ; Riverhead, Long Island, New York, U.S.A.) Feb. 24, 1936, No. 5567. Convention date, Feb. 23, 1935. [Classes 40 (iii) and 40 (v)] An ultra high frequency oscillatory circuit comprises inner and outer concentric tubular conductors coupled together at both ends one of the couplings being capacitative. The Figure shows a superheterodyne receiver in which the antenna 2 is coupled through a transmission line to a tuned circuit 6 comprising a pair of parallel wires connected at one end and capacitatively coupled at the other end, and tapped to match its input and output impedances. The circuit 6 is adjustably coupled to rods 26, 28 surrounded by tubes 34, 36 and arranged inside the concentric tubes 32, 38 forming the oscillatory circuit of the local oscillator 66. The rods 26, 28 are connected to the grids of the push-pull frequency changers 52, 54 which are fed in phase by the local oscillator. The local oscillator circuit is tuned by adjustment of the ring 40 which interconnects the tubular conductors 32, 38 at one end while at the other end they are capacitatively coupled by the hollow metallic drum 60. Adjustment of coupling being effected by the plunger 70. The input circuit 26, 28 is tuned by condenser 46 and gives a band pass effect with sufficiently sharp cut-off to avoid image frequency interference. The frequency changers 52, 54 are fed in parallel with the local oscillations and in push-pull by the signal and have their anodes coupled to the output circuit 98. The frequency of the local oscillator 66 is varied automatically in response to frequency variations by a plate 72 driven by a motor 115 through the clutch device 121. Direction of rotation is controlled by relays 112, 113, actuated by a relay 116 in the output of valves 117, 118. These valves are fed from the detector through circuits tuned on either side of the mean frequency.
GB5567/36A 1935-02-23 1936-02-24 Improvements in or relating to high frequency signalling apparatus Expired GB454831A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB454831A true GB454831A (en) 1936-10-08

Family

ID=21728206

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5567/36A Expired GB454831A (en) 1935-02-23 1936-02-24 Improvements in or relating to high frequency signalling apparatus

Country Status (3)

Country Link
US (1) US2106776A (en)
FR (1) FR802098A (en)
GB (1) GB454831A (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE969565C (en) * 1940-10-02 1958-06-19 Pintsch Bamag Ag Device for monitoring the vibrations generated by an ultra-short wave generator with a cavity resonator
GB581734A (en) * 1941-04-04 1946-10-23 Sperry Gyroscope Co Inc Improvements in or relating to instrument landing systems for aircraft
NL64724C (en) * 1941-07-30 1949-11-15
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
NL65632C (en) * 1943-03-27 1950-05-15
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 (en) * 1956-06-18 1961-06-15 Siemens Ag Tunable, multi-circuit filter for very short electromagnetic waves
DE1268287B (en) * 1956-09-12 1968-05-16 Siemens Ag Tunable filter circuit
US7554500B1 (en) * 2007-04-02 2009-06-30 Sergi Paul D Tuning circuit for a trap antenna

Also Published As

Publication number Publication date
US2106776A (en) 1938-02-01
FR802098A (en) 1936-08-26

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