US3659234A - Broadband flexible wave guides - Google Patents

Broadband flexible wave guides Download PDF

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Publication number
US3659234A
US3659234A US856272A US3659234DA US3659234A US 3659234 A US3659234 A US 3659234A US 856272 A US856272 A US 856272A US 3659234D A US3659234D A US 3659234DA US 3659234 A US3659234 A US 3659234A
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US
United States
Prior art keywords
tube
wave guide
cross
wall
width
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
US856272A
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English (en)
Inventor
Erich Schuttloffel
Gerhard Schickle
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Telefunken Patentverwertungs GmbH
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Telefunken Patentverwertungs GmbH
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Publication date
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Publication of US3659234A publication Critical patent/US3659234A/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/12—Hollow waveguides
    • H01P3/14—Hollow waveguides flexible
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S138/00—Pipes and tubular conduits
    • Y10S138/11—Shape

Definitions

  • the body 1923-163 4/1912 Money "mus/172 cross section includes an indentation extending along the lon- 1,839,919 1/1932 Hall ..l38/l77 X gitudiha] a f the wave guide
  • the indentation is so Shaped 1,859,259 5/1932 Chamberlam et a1 ..l38/l77 X and the ratio of the width of the wave guide at the indented 1,928,009 9/1933 Dormer ..138/177 point to the width f the narrowest side i so small that inter- 2,406,838 9/1946 Kepler ..72/368 f i wave types do no occuh 3,239,002 3/1966 Young .138/172 X 3,299,374 1/1967 Schickle et a1 ..333/95
  • This invention relates to wave guides, and more particularly to a wave guide which is provided with at least one indentation for preventing the formation of interfering waves.
  • Some rectangular wave guides are formed with one or two metal strips extending along the longitudinal axis of the wave guide. These are called ridged wave guides and generally conduct a wider band width. It is difficult to manufacture these in desired lengths, or to make them flexible.
  • a wave guide which may be used for the transmission of a relatively wide band width without producing an interfering second wave type (un wanted mode).
  • a wave guide having a ratio of narrow side to broad side width of less than 0.5, and having an indentation formed so as to extend longitudinally along the wave guide body.
  • the ratio of the width of the wave guide cross section at the indentation to the wave guide narrow side is made sufficiently small, and the indentation is appropriately shaped so that the occurrence of an interfering second wave type is prevented.
  • the wave guide may have two symmetrical indentations, may have planar wall portions in the area of the indentation, and may have a dielectric strip mounted within it between the indentations.
  • FIG. 1 is a cross-sectional view through a wave guide formed according to one embodiment of the invention.
  • FIG. 2 is a cross-sectionalview, similar to FIG. 1, of another embodiment ofthe present-invention.
  • FIG. 1 there is disclosed a wave guide according to the present invention. It includes a generally rectangular hollow body 7 having rounded corners. It has a wide side A and a narrow side B. Two symmetrical indentations 5 and 6 are formed which are extended toward each other and are integral with the broad or wide sides of the wall 2 of the rectangular body 7.
  • the body has a cross sectional profile which is constant along the longitudinal axis of the body.
  • the inner cross section of the body as defined by the inner periphery 1 of wall 2, has a width a along its broad side, a width b at the widest part of its narrow side, and a width d between the indentations 5 and 6. Width d extends in the same general direction as the width b of the narrow side, but is less in dimension than the width b of the narrow side.
  • the lines along which the greatest width b occurs are separated from each other by a distance 6.
  • a dielectric strip 3 is mounted within the hollow body between the indentations 5 and 6.
  • the hollow body can be wound on a drum or twisted. When this is done, the dielectric 3 mounted within the hollow body between the two indentations prevents contact between the opposite wave guide walls and limits the amount of deformation occurring in the area of a bend.
  • FIG. 2 Another embodiment of the invention is schematically represented in FIG. 2. Corresponding parts of the structure of FIG. 2 have reference numerals corresponding to the similar parts of FIG. 1.
  • the portions 4 of the wave guide wall in the region of the center of the indentations are parallel to each other.
  • the wall 2 of the hollow body is made with portions of greatest wall thickness e along the opposite narrow sides, rather than in the region of the indentations as in the FIG. 1 embodiment. This prevents displacement of the cross section and buckling when the wave guide is bent around a broad side a.
  • the inner and outer peripheries of the cross-sectional profile of the wave guide wall 2 are continuous smooth curves without abrupt changes in direction.
  • the wave guide of either embodiment is constructed as a seamless metal tube which is drawn to any desired length in a suitable machine.
  • the wall thicknesses of the wave guides are selected so that a prescribed radius of curvature can be maintained when it is bent about a given radius of curvature or twisted through a given radius of curvature.
  • the ratio of d/b is maintained at such a level and the indentations are'of an appropriate shape so that no interfering wave types arise.
  • the arrangement according to the present invention permits an extremely wide band width to be transmitted and prevents undesired occurrences of interfering wave types.
  • One particularly advantageous use for these wave guides is the transmission of linearly polarized I-I (TE) waves over antenna feeder lines which lead to a listener-receiver, i.e. a receiver which intended to receive as wide a frequency band as possible from the antenna. With this type of device the attenuation of the wave guide is of lesser significance.
  • Example I a 43.2 mm. b I 21.2 mm. d 20.9 mm. d/a 0.48 d/b 0.99 b/a 0.49 Band Width Transmitted Without Interfering Side Waves even in bendings and twisted sections l0
  • Example 2 a 40.0 mm. b 13 mm. d l0.5 mm. d/a 0.27 d/b 0.8 b/a 0.33 Band Width Transmitted Without Interfering Side Waves even in bendings and twisted sections l0
  • a number of tubes of the type of FIG. 2 were constructed. These were then bent about one of their broad sides and twisted through torsional angles until they buckled. The results are set out below:
  • a twistable flexible wave guide of the type which can be wound on a drum and has a broad transmittable bandwidth comprising:
  • an elongated relatively thin-walled flexible seamless metal 5 tube having a constant noncircular cross-sectional profile along its longitudinal axis with the wall of said tube having a thickness which varies along its cross-sectional profile;
  • the inner cross section of said tube as defined by the inner periphery of the wall of said tube, having a wide side of width a and a narrow side of width b at the widest portion thereof with the ratio b/a being less than 0.5; said wall of said tube being shaped so that said inner cross section has a pair of symmetrical indentations which are opposite one another on the wide side thereof and which extend along the longitudinal axis of the tube, said inner cross section wave guide and buckling thereof is prevented when the wave guide is bent about the wide side thereof.

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  • Waveguides (AREA)
  • Waveguide Aerials (AREA)
US856272A 1968-09-21 1969-09-09 Broadband flexible wave guides Expired - Lifetime US3659234A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1790171A DE1790171C2 (de) 1968-09-21 1968-09-21 Breitbandiger Hohlleiter

Publications (1)

Publication Number Publication Date
US3659234A true US3659234A (en) 1972-04-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US856272A Expired - Lifetime US3659234A (en) 1968-09-21 1969-09-09 Broadband flexible wave guides

Country Status (6)

Country Link
US (1) US3659234A (ja)
JP (1) JPS4825157B1 (ja)
BR (1) BR6910653D0 (ja)
DE (1) DE1790171C2 (ja)
FR (1) FR2018577A1 (ja)
GB (1) GB1231930A (ja)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3790905A (en) * 1970-12-03 1974-02-05 Licentia Gmbh Waveguide for simultaneously transmitting two electromagnetic waves
US4603942A (en) * 1983-10-11 1986-08-05 General Dynamics, Pomona Division Flexible, dielectric millimeter waveguide
US4978934A (en) * 1989-06-12 1990-12-18 Andrew Corportion Semi-flexible double-ridge waveguide
US5528208A (en) * 1993-05-12 1996-06-18 Nec Corporation Flexible waveguide tube having a dielectric body thereon
US20220190460A1 (en) * 2020-12-11 2022-06-16 Raytheon Technologies Corporation Waveguide with internal, self-supported feature(s)
US11462808B2 (en) * 2020-05-19 2022-10-04 Roos Instruments, Inc. Conformable waveguide having an obround cross section, a tool for manually conforming an obround waveguide and a method for forming the conformable waveguide

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7152716B2 (ja) * 2018-10-09 2022-10-13 オリンパス株式会社 可撓性導波管、可撓性導波管を有する画像伝送装置、可撓性導波管を有する内視鏡および内視鏡システム

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1023163A (en) * 1911-02-02 1912-04-16 Charles Nicholas Monsarrat Hollow section.
US1839919A (en) * 1927-03-26 1932-01-05 Hall Charles Ward Seamless hollow metallic section and process of making the same
US1859259A (en) * 1929-07-08 1932-05-17 Chamberlain Electrical wiring conduit
US1928009A (en) * 1927-12-27 1933-09-26 Firm Dornier Metallbauten G M Hollow metal beam
US2406838A (en) * 1943-06-28 1946-09-03 Francis M Kepler Method of forming bent tubing
US2479288A (en) * 1944-03-08 1949-08-16 Allen William Douglas Flexible electromagnetic wave guide
DE1025473B (de) * 1954-04-30 1958-03-06 Siemens Ag Biegsamer metallischer Hohlleiter zur UEbertragung von Hohleiterwellen
US3205501A (en) * 1959-10-01 1965-09-07 Gen Electric Closely spaced stocked waveguide antenna array employing reciprocal ridged wageguide phase shifters
US3239002A (en) * 1964-01-06 1966-03-08 Young Radiator Co Tube formation for structuring heatexchanger core-units
FR1462731A (fr) * 1965-01-05 1966-12-16 Btr Industries Ltd Tuyau en matière plastique flexible ou semi-rigide non susceptible de s'aplatir complètement
US3299374A (en) * 1964-04-04 1967-01-17 Telefunken Patent Asymmetrical waveguide
US3396350A (en) * 1964-08-06 1968-08-06 Telefunken Patent Waveguide
US3444487A (en) * 1965-10-01 1969-05-13 Telefunken Patent Waveguide having corrugated exterior and smooth metal coated interior

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE892003C (de) * 1953-08-20 Siemens iS. Halske Aktiengesellschaft, Berlin und München Dielektrisches Rohrkabel mit abgeflachtem Querschnitt zur Übertragung von Ultrakurzwellen
NL89704B (ja) * 1937-09-15
FR49457E (fr) * 1937-11-23 1939-05-01 Materiel Telephonique Systèmes de transmission d'ondes à fréquence très élevée
DE1134428B (de) * 1960-09-29 1962-08-09 Siemens Ag Verfahren zum Verlegen von Hohlleitungen

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1023163A (en) * 1911-02-02 1912-04-16 Charles Nicholas Monsarrat Hollow section.
US1839919A (en) * 1927-03-26 1932-01-05 Hall Charles Ward Seamless hollow metallic section and process of making the same
US1928009A (en) * 1927-12-27 1933-09-26 Firm Dornier Metallbauten G M Hollow metal beam
US1859259A (en) * 1929-07-08 1932-05-17 Chamberlain Electrical wiring conduit
US2406838A (en) * 1943-06-28 1946-09-03 Francis M Kepler Method of forming bent tubing
US2479288A (en) * 1944-03-08 1949-08-16 Allen William Douglas Flexible electromagnetic wave guide
DE1025473B (de) * 1954-04-30 1958-03-06 Siemens Ag Biegsamer metallischer Hohlleiter zur UEbertragung von Hohleiterwellen
US3205501A (en) * 1959-10-01 1965-09-07 Gen Electric Closely spaced stocked waveguide antenna array employing reciprocal ridged wageguide phase shifters
US3239002A (en) * 1964-01-06 1966-03-08 Young Radiator Co Tube formation for structuring heatexchanger core-units
US3299374A (en) * 1964-04-04 1967-01-17 Telefunken Patent Asymmetrical waveguide
US3396350A (en) * 1964-08-06 1968-08-06 Telefunken Patent Waveguide
FR1462731A (fr) * 1965-01-05 1966-12-16 Btr Industries Ltd Tuyau en matière plastique flexible ou semi-rigide non susceptible de s'aplatir complètement
US3444487A (en) * 1965-10-01 1969-05-13 Telefunken Patent Waveguide having corrugated exterior and smooth metal coated interior

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
Chen, T. S. Calculations of the Parameters of Ridge Waveguides, MTT 5, No. 1, 1 1957, pp. 12 17 *
Harvey, A. F., Microwave Engineering Academic Press, 1963, pp. 60 62 *
Harvey, A. F., Microwave Engineering, Academic Press, 1963, pp. 21 27 *
Prodelin, Spir O Guide, Ad in Microwave Jr. 3 1968, p. 130 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3790905A (en) * 1970-12-03 1974-02-05 Licentia Gmbh Waveguide for simultaneously transmitting two electromagnetic waves
US4603942A (en) * 1983-10-11 1986-08-05 General Dynamics, Pomona Division Flexible, dielectric millimeter waveguide
US4978934A (en) * 1989-06-12 1990-12-18 Andrew Corportion Semi-flexible double-ridge waveguide
AU628973B2 (en) * 1989-06-12 1992-09-24 Andrew Corporation Semi-flexible double-ridge waveguide
US5528208A (en) * 1993-05-12 1996-06-18 Nec Corporation Flexible waveguide tube having a dielectric body thereon
US11462808B2 (en) * 2020-05-19 2022-10-04 Roos Instruments, Inc. Conformable waveguide having an obround cross section, a tool for manually conforming an obround waveguide and a method for forming the conformable waveguide
US20220190460A1 (en) * 2020-12-11 2022-06-16 Raytheon Technologies Corporation Waveguide with internal, self-supported feature(s)
US11936091B2 (en) * 2020-12-11 2024-03-19 Rtx Corporation Waveguide apparatus including channel segments having surfaces that are angularly joined at a junction or a corner

Also Published As

Publication number Publication date
GB1231930A (ja) 1971-05-12
DE1790171B1 (de) 1974-01-10
FR2018577A1 (ja) 1970-05-29
DE1790171C2 (de) 1974-08-01
BR6910653D0 (pt) 1973-02-08
JPS4825157B1 (ja) 1973-07-26

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