GB672292A - Improvements relating to ultra-short wave oscillators - Google Patents

Improvements relating to ultra-short wave oscillators

Info

Publication number
GB672292A
GB672292A GB27427/49A GB2742749A GB672292A GB 672292 A GB672292 A GB 672292A GB 27427/49 A GB27427/49 A GB 27427/49A GB 2742749 A GB2742749 A GB 2742749A GB 672292 A GB672292 A GB 672292A
Authority
GB
United Kingdom
Prior art keywords
section
wave
length
gain
sections
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
GB27427/49A
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.)
Thales SA
Original Assignee
CSF Compagnie Generale de Telegraphie sans Fil SA
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 CSF Compagnie Generale de Telegraphie sans Fil SA filed Critical CSF Compagnie Generale de Telegraphie sans Fil SA
Publication of GB672292A publication Critical patent/GB672292A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03B9/00—Generation of oscillations using transit-time effects
    • H03B9/01—Generation of oscillations using transit-time effects using discharge tubes
    • 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
    • H01J25/36—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field
    • H01J25/38—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field the forward travelling wave being utilised

Landscapes

  • Microwave Amplifiers (AREA)

Abstract

672,292. Travelling-wave tubes. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. Oct. 25, 1949 [Nov. 19, 1948], No. 27427/49. Class 39 (i). A travelling-wave tube has a delay line in two sections, the first section being an oscillator of relatively small length to give a wide electronic tuning band and a gain greater than unity and provided with an external feed-back channel and the second dimensioned to give an optimum power factor value. In Fig. 1, the helix H is in two parts, the first section A<SP>1</SP> of which is associated with a feed-back channel R containing a phase shifter D and a filter B, the length being adjusted by wave-guide sections L, L<SP>1</SP> containing pistons. The gain of section A<SP>1</SP> is higher than the critical gain for maintaining oscillations so that excess of power is supplied to the second section A<SP>2</SP> which has optimum conditions, e.g. length, and excess of gain, for power amplification. The section A<SP>2</SP> is coupled at one end to the section A<SP>1</SP> by the union of the helices and at the other end to a wave-guide S. In a modification (Fig. 2, not shown), the two parts of the line H have a gap between them and are decoupled by two grids with an absorptive attenuator adjacent these grids to absorb the reflected wave. Alternatively, a portion of wave-guide section with a cut-off lower than the transmitted wave-length. connects the two helical sections, the H.F. coupling being electronic. In Fig. 4, the wave-length section P is of greater length and forms a drift space, giving a higher modulation at the entrance to helical section H<SP>2</SP>. Here again an absorptive attenuator A is provided. Specification 667,208, [Group XL (c)], is referred to.
GB27427/49A 1948-11-19 1949-10-25 Improvements relating to ultra-short wave oscillators Expired GB672292A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR873567X 1948-11-19

Publications (1)

Publication Number Publication Date
GB672292A true GB672292A (en) 1952-05-21

Family

ID=9359355

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27427/49A Expired GB672292A (en) 1948-11-19 1949-10-25 Improvements relating to ultra-short wave oscillators

Country Status (5)

Country Link
BE (1) BE492101A (en)
CH (1) CH290458A (en)
DE (1) DE873567C (en)
FR (1) FR978576A (en)
GB (1) GB672292A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3143681A (en) * 1959-12-07 1964-08-04 Gen Electric Spiral electrostatic electron lens

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2753481A (en) * 1952-06-14 1956-07-03 Sperry Rand Corp Travelling wave oscillators
DE974255C (en) * 1954-08-05 1960-11-10 Standard Elek K Lorenz Ag Traveling field amplifier tube with at least two helices lying one behind the other in the electron beam direction
DE1096509B (en) * 1955-04-09 1961-01-05 Telefunken Gmbh Traveling field amplifier tubes, the delay line of which consists of two helical sections lying one behind the other

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL76331C (en) * 1946-01-11 Western Electric Co

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3143681A (en) * 1959-12-07 1964-08-04 Gen Electric Spiral electrostatic electron lens

Also Published As

Publication number Publication date
DE873567C (en) 1953-04-16
CH290458A (en) 1953-04-30
BE492101A (en)
FR978576A (en) 1951-04-16

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