US3849695A - Distributed deflection structure employing dielectric support - Google Patents

Distributed deflection structure employing dielectric support Download PDF

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Publication number
US3849695A
US3849695A US00380627A US38062773A US3849695A US 3849695 A US3849695 A US 3849695A US 00380627 A US00380627 A US 00380627A US 38062773 A US38062773 A US 38062773A US 3849695 A US3849695 A US 3849695A
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United States
Prior art keywords
members
conductive
deflection
defining
elongated
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
US00380627A
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English (en)
Inventor
R Piazza
B Janko
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.)
Tektronix Inc
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Tektronix Inc
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Filing date
Publication date
Application filed by Tektronix Inc filed Critical Tektronix Inc
Priority to US00380627A priority Critical patent/US3849695A/en
Priority to GB2396974A priority patent/GB1466985A/en
Priority to CA201,395A priority patent/CA998729A/en
Priority to FR747422928A priority patent/FR2238243B1/fr
Priority to NLAANVRAGE7408669,A priority patent/NL168650C/xx
Priority to DE2432592A priority patent/DE2432592C2/de
Priority to JP7971574A priority patent/JPS5627984B2/ja
Application granted granted Critical
Publication of US3849695A publication Critical patent/US3849695A/en
Priority to JP55107616A priority patent/JPS5837657B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/70—Arrangements for deflecting ray or beam
    • H01J29/708—Arrangements for deflecting ray or beam in which the transit time of the electrons has to be taken into account
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof

Definitions

  • Such support means renders the structures less attractive at high frequencies due to the production of strong localized variations of deflection structure impedance in the vicinity of the support, by increasing forward coupling of the deflecting signal down the deflection structure via the increased intercapacitance, and in general by radiation from the metal supports which tend to become antenna at frequencies approximately 1 GI-I or greater.
  • one method is to make the support members sufficiently small in comparison to the deflection structure. This however, presents mechanical limitations in the manufacturing process.
  • Another method supports the deflection structure by using supports which are pretuned during manufacture to provide a constant impedance of the deflection structure over a certain band of frequencies. This method however, will not allow operation over a wide band of frequencies and can suffer further due to limitations in manufacturing processes.
  • Dielectric support means have also been used in the prior art.
  • One such method as disclosed in US. Pat. No. 2,828,440 employes a conventional elongated metal helix structure supported by means of longitudinal extending dielectric rods disposed around the helix.
  • this method is to limit the bandwidth of such traveling wave tube by using the dielectric support members as a factor in limiting such bandwidth.
  • a second method using a dielectric support, but for a traveling wave tube, structure is disclosed in US. Pat. No. 3,551,729.
  • a helix is supported by a plu' rality of dielectric supports parallel to the helix axis and contacting the helix.
  • Such method is limited in that only parallel support means may be employed and is not a deflection structure.
  • SUMMARY OF INVENTION Deflection structures having support means made of a dielectric material reduce to a minimum most of the disadvantages of the prior art as mentioned above as they will not produce strong localized variations in impedance, increased forward coupling significantly down the structure, nor will they radiate to any appreciable extent. These factors tend to extend considerably the bandpass of the deflection structures over conventional mounting techniques.
  • FIG. 1 is a solid comb of dielectric support means
  • FIG. 2 is a separate dielectric support means secured to glass rods to support such means;
  • FIG. 3 is solid dielectric support means
  • FIG. 4 is a dielectric support means using various combinations shown in FIG. 1-3.
  • FIG. 5 is a deflection system according to the present invention.
  • a solid comb of dielectric support means 1 is provided.
  • Supports 2 are made of a dielectric material and are a portion of the solid comb.
  • brazing, epoxy or other suitable cement is bonded to the deflection structure via anyone of several techniques known such as brazing, epoxy or other suitable cement
  • dielectric supports have a reasonably low dielectric constant, they will not produce strong localized variations in impedance, increase forward coupling significantly down the structure, nor will they radiate to any appreciable extent.
  • Another feature of the present invention and which can be discerned from the drawing of FIG. I is the flexibility in geometry of external ground plane 4 placed on the back side of the helix 3 so that an electron beam 5 is between such helix and ground plane.
  • FIG. 2 shows another embodiment of the present invention.
  • Dielectric supports 6 are embedded into glass rod 7 at one end and bonded to a deflection structure 8 at the opposite end as described above.
  • the electron beam 9 is deflected between ground plane 10 and the deflection structure 8.
  • Such construction enables deflection structure 8 to be supported as desired i.e., it is not necessary to connect each turn of the deflection structure to a separate dielectric support.
  • FIG. 3 Another method of supporting a deflection structure is shown in FIG. 3.
  • a solid block or bar of dielectric material 11 has a deflection structure 12 bonded to such dielectric support.
  • an electron beam 13 is deflected between the deflection structure 12 and a ground plane 14.
  • FIG. 4 shows various methods already described along with FIGS. 1-3 for providing a deflection structure according to the present invention. Using these techniques of construction, single ended or balanced deflection structures are possible. In each end view shown, the dielectric supports have been given the reference number while the deflection structure, electron beam, and ground plane(s) are identified as l6, l7, and 18 respectively.
  • FIG. 5 Shown in FIG. 5 is a complete deflection structure according to the present invention. Basically, two helical delay lines having flat surfaces are assembled into a balanced deflection system using the above listed techniques. The deflecting field appears in the gap between the helices which are contoured to provide the required sensitivity and scan. The impedance of such line can be set to match the deflection amplifier used with such structure.
  • Dielectric supports 19 are embedded into glass rods 20 and 21. The other end of such dielectric supports are bonded to the balanced and identical helical wound deflection structures 22 and 23. The deflection structure is then placed between deflector end supports 24 and 25. Such end supports may be bonded or secured to glass rods 20 and 21 using known methods and are provided with appropriate apertures for receiving and outputing the electron beam 26 as is wellknown.
  • each turn of helical members 22 and 23 is supported at a point 27 which is close to the electron beam path at the reverse side of the deflection structure facing the electron beam.
  • the active deflecting portions of the helix may be positioned so as to achieve distortionless deflection when, say the deflection structure is used in a high quality CRT. It should be noted that if the configuration of the helical conductor is insufficient to shield the dielectric support from the electron beam adequately, the support can be made slightly conductive to bleed away spurious charges.
  • Dielectric supported deflection means comprising:
  • Dielectric supported deflection means comprising:
  • an elongated non-conductive member defining a glass rod; an array of non-conductive parallel members having one end supported within said elongated member 5 and the other end forming a comb structure having teeth extending therefrom;
  • An electronic scanning device deflection structure having dielectric supports comprising:
  • An electronic scanning device comprising:
  • an electron gun including an electron emissive cathode, positioned in one end of said evacuated enve lope for projecting a beam of electrons;
  • electron collecting means defining a cathode-raytube target positioned at the opposite end of said evacuated envelope from said electron gun;
  • deflection means positioned between said electron gun and said electron collecting means, said deflection means including two mutual facing helical conductors defining helix members having flat surfaces supported within said envelope by dielectric support means for precisely positioning said helical conductors adjacent said projected electron beam.

Landscapes

  • Microwave Tubes (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
US00380627A 1973-07-19 1973-07-19 Distributed deflection structure employing dielectric support Expired - Lifetime US3849695A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US00380627A US3849695A (en) 1973-07-19 1973-07-19 Distributed deflection structure employing dielectric support
GB2396974A GB1466985A (en) 1973-07-19 1974-05-30 Distributed electron deflection structure employing dielectric support
CA201,395A CA998729A (en) 1973-07-19 1974-05-31 Distributed deflection structure employing dielectric support
FR747422928A FR2238243B1 (de) 1973-07-19 1974-06-26
NLAANVRAGE7408669,A NL168650C (nl) 1973-07-19 1974-06-27 Elektronenstraalbuis met in schoeflijn gewonden platte geleider.
DE2432592A DE2432592C2 (de) 1973-07-19 1974-07-06 Ablenkvorrichtung für den Elektronenstrahl einer Kathodenstrahlröhre oder dergleichen
JP7971574A JPS5627984B2 (de) 1973-07-19 1974-07-11
JP55107616A JPS5837657B2 (ja) 1973-07-19 1980-08-05 広帯域電子ビ−ム偏向装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00380627A US3849695A (en) 1973-07-19 1973-07-19 Distributed deflection structure employing dielectric support

Publications (1)

Publication Number Publication Date
US3849695A true US3849695A (en) 1974-11-19

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Application Number Title Priority Date Filing Date
US00380627A Expired - Lifetime US3849695A (en) 1973-07-19 1973-07-19 Distributed deflection structure employing dielectric support

Country Status (7)

Country Link
US (1) US3849695A (de)
JP (2) JPS5627984B2 (de)
CA (1) CA998729A (de)
DE (1) DE2432592C2 (de)
FR (1) FR2238243B1 (de)
GB (1) GB1466985A (de)
NL (1) NL168650C (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005408A (en) * 1975-10-08 1977-01-25 The United States Of America As Represented By The Secretary Of The Army Multiple electron beam analog to digital converter
US4076994A (en) * 1976-04-09 1978-02-28 Rca Corporation Flat display device with beam guide
US4093891A (en) * 1976-12-10 1978-06-06 Tektronix, Inc. Traveling wave deflector for electron beams
US4207492A (en) * 1977-05-31 1980-06-10 Tektronix, Inc. Slow-wave high frequency deflection structure
US4507586A (en) * 1982-10-27 1985-03-26 Tektronix, Inc. Traveling wave push-pull electron beam deflector with pitch compensation
US5172029A (en) * 1991-01-22 1992-12-15 The United States Of America As Represented By The United States Department Of Energy Shielded helix traveling wave cathode ray tube deflection structure
US5376864A (en) * 1992-10-29 1994-12-27 The United States Of America As Represented By The Department Of Energy Shielded serpentine traveling wave tube deflection structure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR890005026B1 (ko) * 1987-04-13 1989-12-06 석윤기 라이터용 가스유출 밸브노즐의 제조방법

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3376464A (en) * 1965-11-30 1968-04-02 Lab D Electronique Et De Physi Beam deflection system comprising a flattened helix
US3504222A (en) * 1966-10-07 1970-03-31 Hitachi Ltd Slow-wave circuit including meander line and shielding therefor
US3610999A (en) * 1970-02-05 1971-10-05 Varian Associates Slow wave circuit and method of fabricating same
US3654509A (en) * 1970-12-14 1972-04-04 Varian Associates Dielectrically supported helix derived slow wave circuit
US3670196A (en) * 1971-02-24 1972-06-13 Raytheon Co Helix delay line for traveling wave devices
US3689852A (en) * 1970-02-13 1972-09-05 Thomson Csf Ring and bar delay line
US3705327A (en) * 1971-06-02 1972-12-05 Allan W Scott Microwave generator with interleaved focusing and interaction structures
US3736534A (en) * 1971-10-13 1973-05-29 Litton Systems Inc Planar-shielded meander slow-wave structure

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE845220C (de) * 1951-02-09 1952-07-31 Hellmuth Mohr Punktweise gehalterter wendelfoermiger Wellenleiter
US3694689A (en) * 1971-02-24 1972-09-26 Tektronix Inc Electron beam deflection apparatus

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3376464A (en) * 1965-11-30 1968-04-02 Lab D Electronique Et De Physi Beam deflection system comprising a flattened helix
US3504222A (en) * 1966-10-07 1970-03-31 Hitachi Ltd Slow-wave circuit including meander line and shielding therefor
US3610999A (en) * 1970-02-05 1971-10-05 Varian Associates Slow wave circuit and method of fabricating same
US3689852A (en) * 1970-02-13 1972-09-05 Thomson Csf Ring and bar delay line
US3654509A (en) * 1970-12-14 1972-04-04 Varian Associates Dielectrically supported helix derived slow wave circuit
US3670196A (en) * 1971-02-24 1972-06-13 Raytheon Co Helix delay line for traveling wave devices
US3705327A (en) * 1971-06-02 1972-12-05 Allan W Scott Microwave generator with interleaved focusing and interaction structures
US3736534A (en) * 1971-10-13 1973-05-29 Litton Systems Inc Planar-shielded meander slow-wave structure

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005408A (en) * 1975-10-08 1977-01-25 The United States Of America As Represented By The Secretary Of The Army Multiple electron beam analog to digital converter
US4076994A (en) * 1976-04-09 1978-02-28 Rca Corporation Flat display device with beam guide
US4093891A (en) * 1976-12-10 1978-06-06 Tektronix, Inc. Traveling wave deflector for electron beams
DE2752881A1 (de) * 1976-12-10 1978-06-15 Tektronix Inc Wanderwellen-ablenkeinheit
US4207492A (en) * 1977-05-31 1980-06-10 Tektronix, Inc. Slow-wave high frequency deflection structure
US4507586A (en) * 1982-10-27 1985-03-26 Tektronix, Inc. Traveling wave push-pull electron beam deflector with pitch compensation
US5172029A (en) * 1991-01-22 1992-12-15 The United States Of America As Represented By The United States Department Of Energy Shielded helix traveling wave cathode ray tube deflection structure
US5376864A (en) * 1992-10-29 1994-12-27 The United States Of America As Represented By The Department Of Energy Shielded serpentine traveling wave tube deflection structure

Also Published As

Publication number Publication date
DE2432592C2 (de) 1982-04-08
GB1466985A (en) 1977-03-16
JPS5040067A (de) 1975-04-12
JPS56123650A (en) 1981-09-28
NL7408669A (nl) 1975-01-21
JPS5837657B2 (ja) 1983-08-17
CA998729A (en) 1976-10-19
JPS5627984B2 (de) 1981-06-29
NL168650C (nl) 1982-04-16
FR2238243B1 (de) 1979-02-09
DE2432592A1 (de) 1975-02-06
FR2238243A1 (de) 1975-02-14
NL168650B (nl) 1981-11-16

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