GB656871A - Improvements in apparatus for generating wavelength modulated waves - Google Patents

Improvements in apparatus for generating wavelength modulated waves

Info

Publication number
GB656871A
GB656871A GB496643A GB496643A GB656871A GB 656871 A GB656871 A GB 656871A GB 496643 A GB496643 A GB 496643A GB 496643 A GB496643 A GB 496643A GB 656871 A GB656871 A GB 656871A
Authority
GB
United Kingdom
Prior art keywords
anode
magnetic field
frequency
modulated
variable
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
GB496643A
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.)
Philips Lamps Ltd
Koninklijke Philips NV
Original Assignee
Philips Lamps Ltd
Philips Gloeilampenfabrieken NV
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
Priority claimed from US436374A external-priority patent/US2372210A/en
Priority claimed from US474591A external-priority patent/US2372328A/en
Application filed by Philips Lamps Ltd, Philips Gloeilampenfabrieken NV filed Critical Philips Lamps Ltd
Publication of GB656871A publication Critical patent/GB656871A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • H03K7/04—Position modulation, i.e. PPM
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/34—Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
    • H01J25/42—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and with a magnet system producing an H-field crossing the E-field
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/30—Angle modulation by means of transit-time tube

Landscapes

  • Particle Accelerators (AREA)
  • Lasers (AREA)

Abstract

656,871. Frequency and phase modulation. PHILIPS LAMPS, Ltd. March 26, 1943, No. 4966. Convention date, March 26, 1942. [Class 40 (v)] [Also in Group XL (a)] Frequency or phase-modulated oscillations are obtained by subjecting a carrier-modulated electron beam, in a zone between an entry O and a collector A, to a variable magnetic field extending over a major portion of the zone and which deflects it in an arc and produces in it a variable time delay; if the variation is proportional to the integral of the intelligence to be transmitted, a frequency modulation is obtained. The beam from cathode K is modulated at G with a pure sine wave of stabilized frequency and at O enters a region of crossed magnetic and electric fields H and E respectively, describing a cycloid before impinging on anode A with a time delay depending on the value of the magnetic field. To reduce the length of the anode, the magnetic field is made up of a fixed part and a variable part. The electric field E may be omitted. The coils Q1, Q2 which produce the magnetic field may be part of the anode inductance of an integrator of the type in which an inductance of high impedance forms the anode load of a thermionic valve of low impedance. The alternative form of integrator in which a condenser of low impedance loads a high impedance pentode is also referred to.
GB496643A 1942-03-26 1943-03-26 Improvements in apparatus for generating wavelength modulated waves Expired GB656871A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US436374A US2372210A (en) 1942-03-26 1942-03-26 Method of generating frequency modulated waves
US474591A US2372328A (en) 1943-02-03 1943-02-03 Electronic device

Publications (1)

Publication Number Publication Date
GB656871A true GB656871A (en) 1951-09-05

Family

ID=27030935

Family Applications (2)

Application Number Title Priority Date Filing Date
GB496643A Expired GB656871A (en) 1942-03-26 1943-03-26 Improvements in apparatus for generating wavelength modulated waves
GB726444A Expired GB665341A (en) 1942-03-26 1944-04-19 Improvements in or relating to electronic discharge devices

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB726444A Expired GB665341A (en) 1942-03-26 1944-04-19 Improvements in or relating to electronic discharge devices

Country Status (5)

Country Link
BE (1) BE476452A (en)
DE (1) DE809566C (en)
FR (1) FR962821A (en)
GB (2) GB656871A (en)
NL (1) NL73827C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1026443B (en) * 1953-04-16 1958-03-20 Csf Electronic switch tubes

Also Published As

Publication number Publication date
BE476452A (en)
GB665341A (en) 1952-01-23
NL73827C (en)
FR962821A (en) 1950-06-21
DE809566C (en) 1951-07-30

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