US2607850A - Wave guide impedance element - Google Patents

Wave guide impedance element Download PDF

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Publication number
US2607850A
US2607850A US610956A US61095645A US2607850A US 2607850 A US2607850 A US 2607850A US 610956 A US610956 A US 610956A US 61095645 A US61095645 A US 61095645A US 2607850 A US2607850 A US 2607850A
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US
United States
Prior art keywords
guide
aperture
partition
waves
frequency
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
US610956A
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English (en)
Inventor
Fox Arthur Gardner
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.)
AT&T Corp
Original Assignee
Bell Telephone Laboratories Inc
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 to BE468045D priority Critical patent/BE468045A/xx
Priority to NL73887D priority patent/NL73887C/xx
Priority claimed from US452851A external-priority patent/US2432093A/en
Priority to GB22914/45A priority patent/GB578617A/en
Priority to GB18433/43A priority patent/GB578597A/en
Application filed by Bell Telephone Laboratories Inc filed Critical Bell Telephone Laboratories Inc
Priority to US610956A priority patent/US2607850A/en
Priority to US610957A priority patent/US2434645A/en
Priority to US612681A priority patent/US2422191A/en
Priority to US612680A priority patent/US2503549A/en
Priority to US614936A priority patent/US2530691A/en
Priority to US614935A priority patent/US2432094A/en
Priority to US614937A priority patent/US2434646A/en
Priority to CH265036D priority patent/CH265036A/fr
Priority to FR938693D priority patent/FR938693A/fr
Priority to US789811A priority patent/US2588226A/en
Priority to DEP28888A priority patent/DE818384C/de
Priority to US266179A priority patent/US2740094A/en
Publication of US2607850A publication Critical patent/US2607850A/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
    • H01P1/2138—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies using hollow waveguide filters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/207—Hollow waveguide filters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/207—Hollow waveguide filters
    • H01P1/209—Hollow waveguide filters comprising one or more branching arms or cavities wholly outside the main waveguide
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/02—Coupling devices of the waveguide type with invariable factor of coupling
    • H01P5/022—Transitions between lines of the same kind and shape, but with different dimensions
    • H01P5/024—Transitions between lines of the same kind and shape, but with different dimensions between hollow waveguides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave

Definitions

  • FIG. 1 A first figure.
  • Thistinventio'n relates to-guided electromagnetic wave transmission"and-more particularly to impedance :elements:andterminations for wave guides.
  • An object of the invention' is. toliqrovide 'simple vseries resonant 'impedancexbranch'es' and simple parallel resonant'finipedance branches for use "in waveguides.
  • Anotherobject' of thez invention is 1 to' provide a refie ction'less .terminat'ionifor a, wave guide;
  • dielectric filler willserv'e'as fai guideior suitable electromagnetic wavesz' Z cross-"section the sheath may "be circular, recta ular; or of other shape; for all frequencies'fabove a minimum, known.1as the cut-01f frequency, "the" guide? act's likea transmission lineandhas' a'specifitrpropagationr constant: and char-act'eristicimpedance.
  • any particular'frequencyfthere areiarrinfinite number of cross-sectional'jsizesfland" shapes of guide which will have the" same. characteristic impedance.
  • Shunt reactive elements are obtained" placingrpfirtial.obstructions across the waveguide.
  • a' shunt freactive' element maybe provided'by a transverse metarpartiti'on having'a slit therein which' extends substantially from, one sidetolth'e other. Iffthe s1itis' perpendicular to the direction 'of polarization ofl'the electric field; the. elementwis primarily 1 capacitive, andljifj parallel with the 'fiel'd'the element is nrimarilylinductive.
  • an aperture'in atransverserpartition in alwave'gui'de is" proportioned' to providejboth linductiveand capacitive components in the. rightamountst'o resonate at aj particular frequency:
  • the shape of the aperture' the' resonance -thus prod'uced' may be eitherof' the paralleltype, ofle'rin'g aYhighshuntimnedanceiacross' the guide,
  • orofthe'series typ ofierin'gfa low shuntirnpedance:
  • tori-series resonance The resonance may be" sharpened by" providing in- I wardly extendingprojections on oppositesides" of the opening:
  • A- wid'eropening mayfbe used-ifflthe opposed edges' of the aperture are' 'ma-de'thicker,
  • tition in"awave guide may' bema'de'to provi'de preferablyso designed' th t its' 'efiective shunt-re sistance is" approximately equal to: the charace teristicimpedance of the guide: The "point of 'zero' potential i's'spaced approx-imate'l'y'a quarter wavelength from theelement and may beestab tition:
  • Fig: 3 shows 'awave guide termination-inaccor-dance with theinventi'on-employing a jiarallel resonant elementin r Fig: -shows animpedanceelement in accordance'with the 'inventionthat may-fbe'adjus'ted eitherparallel" or series resonance; and- Fi'gs; 5" .and- 6 showseries -'resonantelements in .
  • Fig: 1 shows 'awave guide termination-inaccor-dance with theinventi'on-employing a jiarallel resonant elementin r Fig: -shows animpedanceelement in accordance'with the 'inventionthat may-fbe'adjus'ted eitherparallel" or series resonance; and- Fi'gs; 5" .and- 6 showseries -'resonantelements in .
  • Fig: 1 shows 'awave guide termination-inaccor-
  • Fig; 2 is similar toFig: "1 except that theaperguidel and'has'itslengthparallel tothe direction ofthe electric field" E2
  • a partitionoff'this" type providesra shuntinductive react'ance; the magnitude' of which also decreases asthe width of the aperture"*li-tdecreases.
  • jFfg. *3 shb'ws a parallel-resonant element, that is, one provide ing a high'shunt impedance, in a rectangular height V or the width W has been chosen, the
  • the line I3 gives the locus of the upper right-hand corner I4 of all possible rectangular apertures that I will provide parallel resonance in the wave guide I. 7
  • Fig. 3 there will be a resistance which is eflec-H tively shunted across the guide I.
  • the value of this resistance decreases as the dimension V 'decreases and its range may extend from a small fractionof the characteristic impedance of the guide I toinfinity. It is possible, therefore, to design a particular resonant aperture which will have a shunt resistance equal to the characteristic impedance of the guide;
  • Such an element placed inthe guide and followed by a solid metallicpartition such as I5 placed one-quarter of a wavelength behind the element II will serve as a reflectionless termination for the guide I.
  • a termination of thistype uses no conventional resistance elements.
  • the power is dissipated by high circulating currentsin the metal partition I] t which has highthermal conductivity and is in metallic contact with the :walls of the guide I and therefore is capable of dissipating a large amount of'power .
  • the element I l whenused in a termination of the type describedu is preferably made of a metal having comparatively low electrical conductivity such, for example, as iron, since it. is thereby possible to make the aperture larger.
  • Fig 4 shows a circular guide I having therein an impedance element which may be adjusted for I either parallel resonance or series resonance.
  • Fig. 5 shows an element more particularly adaptedfor series resonance, providing a low shunt impedance.
  • the partition [6, has a sym-, metrical aperture having its length perpendicular to the electric field E and its width constricted toward the center by means of the inwardly extending projections 2
  • FIG. 6 shows a modification of the seriesresonant element of Fig. 5 in which the flaps 23 and Mare replaced by two opposing metallic netic waves therein, a'partition transversely dis- '4 plates 25 and 26 which are perpendicular to the partition I6 and attached to the ends of the projections 2
  • partitions be secured to the walls of the guide'by soldering, welding or in some other appropriate manner such that a good electrical contact is obtained. It should also be noted that thinner partitions than those shown in the drawings, will, under some circumstances, produce more satisfactory results. The partitions have been shown thicker in the drawings only in the interest of clarity.
  • a conductivelyj sheathed wave guide means for establishing electromagnetic waves therein, a partition transversely ,disposed at a point in said guide and'a rectangular aperture in said partition, the height of said aperture in the direction of polarization of the electric field of said waves and the width ofsaid aperture in a direction, perpendicular thereto being proportioned with respect to each other to provide at said point .av shunt impedance branch which is parallel-resonant at. the frequency of said waves.
  • a conductively sheathed wave guide means forestablishing electromagposed .at apointin said, guide, and a rectangular aperture. in said partition, the height, of,.said aperture. in the direction of polarization of the electric field of said waves and the width ofsaid aperture in a direction,-perpendicular thereto being proportioned with respect to each other to provide at said point a shunt impedance branch which is parallel-resonant at the frequency-of said waves and the resistance of said branch being approximately equal-to-the characteristi impedance of said guide.
  • a conductively sheathed wave guide means for establishing therein electromagnetic waves, and an apertured partition transversely disposed in said guide, said partition being parallel-resonant at the frequency of said waves and the effective shunt resistance associated with said partition being approximately equal to the characteristic impedance of said guide.
  • a metallic pipe-shaped guide having a rectangular cross-section for propagating electromagnetic Waves dielectrically, exciting means for establishing within said guide electromagnetic waves, and a partition substantially perpendicular to the direction of propagation of said waves, said partition being provided with a rectangular shaped slot which is tuned to be resonant to the frequency of said waves.
  • a hollow-pipe type wave guide for transmitting electromagnetic waves dielectrically, exciting means for establishing electromagnetic Waves in said guide, a metallic wall member associated with said guide and positioned transverse thereto relative to the direction of wave propagation through said guide and comprising an opening tuned to the frequency of the exciting means thereby effecting a concentration of the potential incident to the waves, and means for controlling the effective dimensions of said opening for controlling the frequency at which said opening is resonant.
  • a :wave guide comprising essentially a pipe-like member, means connected to said member for establishing electromagnetic waves within said member, a wall member substantially perpendicular to the longitudinal axis of said first member and having therein an aperture which is tuned to the frequency of exciting electromagnetic waves to effect a concentration of one component of the electromagnetic field for producing a concentrated region of the field intensity, and means for controlling the effective dimensions of said aperture for controlling the frequency at which said aperture is resonant.
  • a dielectric wave guide of the hollow-pipe type exciting means for establishing electromagnetic waves within said guide, a metallic wall positioned in said guide and lying in a plane substantially transverse to the direction of wave propagation through said guide and provided with an aperture having an appreciable dimension perpendicular to the electric component of the field incident to the propagation of said waves through said guide and tuned to the frequency of said exciting means, and means for controlling the effective dimensions of said aperture and for controlling the frequency at which said aperture is resonant.
  • a dielectric wave guide of the hollow-pipe type exciting means for establishing electromagnetic waves within said guide, a metallic wall positioned in said guide and lying in a plane substantially transverse to the direction of wave propagation through said guide and provided with an aperture having an appreciable dimension perpendicular to the electric component of the field incident to the propagation of said waves through said guide and tuned to the frequency of said exciting means, and mechanical means for controlling the effective dimensions of said aperture and for controlling the frequency at which said aperture is resonant.
  • a dielectric wave guide of the hollow-pipe type exciting means for establishing electromagnetic waves within said guide, a metallic wall positioned in said guide and lying in a plane substantially transverse to the direction of wave propagation through said guide and provided with an aperture having an appreciable dimension perpendicular to the electric component of the field incident to the propagation of said waves through said guide and tuned to the frequency of said exciting means, and means for controlling the eifective configuration of said aperture and for controlling the natural resonance frequency thereof.
  • a metallic pipe-shaped guide having a rectangular cross section for propagating electromagnetic waves dielectrically, exciting means for establishing within said pipelike member electromagnetic waves, and a radiative wall substantially perpendicular to the direction of propagation of said waves and being provided with a rectangular shaped slot which is tuned to be resonant to the frequency of said exciting means.

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US610956A 1942-07-30 1945-08-17 Wave guide impedance element Expired - Lifetime US2607850A (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
BE468045D BE468045A (en(2012)) 1942-07-30
NL73887D NL73887C (en(2012)) 1942-07-30
GB22914/45A GB578617A (en) 1942-07-30 1943-11-05 Improvements in or relating to systems for transmitting guided electromagnetic waves
GB18433/43A GB578597A (en) 1942-07-30 1943-11-05 Improvements in or relating to systems for transmitting guided electromagnetic waves
US610956A US2607850A (en) 1942-07-30 1945-08-17 Wave guide impedance element
US610957A US2434645A (en) 1942-07-30 1945-08-17 Wave guide bend
US612681A US2422191A (en) 1942-07-30 1945-08-25 Impedance transformer for wave guides
US612680A US2503549A (en) 1942-07-30 1945-08-25 Impedance matching in wave guides
US614936A US2530691A (en) 1942-07-30 1945-09-07 Wave filter
US614935A US2432094A (en) 1942-07-30 1945-09-07 Impedance transformer for wave guides
US614937A US2434646A (en) 1942-07-30 1945-09-07 Wave guide branching arrangement
CH265036D CH265036A (fr) 1942-07-30 1946-09-12 Filtre pour ondes électromagnétiques guidées.
FR938693D FR938693A (fr) 1942-07-30 1946-10-24 Système pour la transmission d'ondes électromagnétiques guidées
US789811A US2588226A (en) 1942-07-30 1947-12-05 Wave filter
DEP28888A DE818384C (de) 1942-07-30 1948-12-31 Filter zur UEbertragung eines Bandes in Hohlleitern gefuehrter elektrischer Mikro-Wellen
US266179A US2740094A (en) 1942-07-30 1952-01-12 Wave-guide impedance elements

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US452851A US2432093A (en) 1942-07-30 1942-07-30 Wave transmission network
US610956A US2607850A (en) 1942-07-30 1945-08-17 Wave guide impedance element
US612680A US2503549A (en) 1942-07-30 1945-08-25 Impedance matching in wave guides
US614937A US2434646A (en) 1942-07-30 1945-09-07 Wave guide branching arrangement
US614936A US2530691A (en) 1942-07-30 1945-09-07 Wave filter
US789811A US2588226A (en) 1942-07-30 1947-12-05 Wave filter
US266179A US2740094A (en) 1942-07-30 1952-01-12 Wave-guide impedance elements

Publications (1)

Publication Number Publication Date
US2607850A true US2607850A (en) 1952-08-19

Family

ID=27569520

Family Applications (6)

Application Number Title Priority Date Filing Date
US610956A Expired - Lifetime US2607850A (en) 1942-07-30 1945-08-17 Wave guide impedance element
US612680A Expired - Lifetime US2503549A (en) 1942-07-30 1945-08-25 Impedance matching in wave guides
US614937A Expired - Lifetime US2434646A (en) 1942-07-30 1945-09-07 Wave guide branching arrangement
US614936A Expired - Lifetime US2530691A (en) 1942-07-30 1945-09-07 Wave filter
US789811A Expired - Lifetime US2588226A (en) 1942-07-30 1947-12-05 Wave filter
US266179A Expired - Lifetime US2740094A (en) 1942-07-30 1952-01-12 Wave-guide impedance elements

Family Applications After (5)

Application Number Title Priority Date Filing Date
US612680A Expired - Lifetime US2503549A (en) 1942-07-30 1945-08-25 Impedance matching in wave guides
US614937A Expired - Lifetime US2434646A (en) 1942-07-30 1945-09-07 Wave guide branching arrangement
US614936A Expired - Lifetime US2530691A (en) 1942-07-30 1945-09-07 Wave filter
US789811A Expired - Lifetime US2588226A (en) 1942-07-30 1947-12-05 Wave filter
US266179A Expired - Lifetime US2740094A (en) 1942-07-30 1952-01-12 Wave-guide impedance elements

Country Status (6)

Country Link
US (6) US2607850A (en(2012))
BE (1) BE468045A (en(2012))
CH (1) CH265036A (en(2012))
DE (1) DE818384C (en(2012))
FR (1) FR938693A (en(2012))
GB (1) GB578597A (en(2012))

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US2744242A (en) * 1950-01-04 1956-05-01 Sperry Rand Corp Wave guide delay line
US2783348A (en) * 1954-03-26 1957-02-26 Nat Cylinder Gas Co High-frequency heating applicators
US3360750A (en) * 1965-07-23 1967-12-26 Varian Associates High frequency waveguide load comprising a dielectric window in contact with lossy coolant fluid
EP0943160A4 (en(2012)) * 1996-02-26 1999-09-22

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US3577104A (en) * 1968-12-26 1971-05-04 Microwave Dev Lab Inc Waveguide filter having sequence of thick capacitive irises
US3593155A (en) * 1968-12-27 1971-07-13 Bendix Corp Resonant ring varactor circuit
US3600711A (en) * 1969-08-13 1971-08-17 Varian Associates Coaxial filter having harmonic reflective and absorptive means
US3611214A (en) * 1969-08-18 1971-10-05 Varian Associates Waveguide reflective harmonic filter
US3731235A (en) * 1971-11-03 1973-05-01 Gte Sylvania Inc Dual polarized diplexer
US4028651A (en) * 1976-05-06 1977-06-07 Hughes Aircraft Company Coupled-cavity microwave filter
US4124830A (en) * 1977-09-27 1978-11-07 Bell Telephone Laboratories, Incorporated Waveguide filter employing dielectric resonators
DE3208029A1 (de) * 1982-03-05 1983-09-15 Siemens AG, 1000 Berlin und 8000 München Frequenzweiche zur trennung zweier frequenzbaender unterschiedlicher frequenzlage
US4602229A (en) * 1983-12-30 1986-07-22 Motorola, Inc. Resonant bandpass T filter and power splitter
US4725796A (en) * 1985-03-13 1988-02-16 The Boeing Company Millimeter and infra-red wavelength separating device
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DE3729402A1 (de) * 1987-09-03 1989-03-16 Licentia Gmbh Hohlleiter-filteranordnung
RU2739969C1 (ru) * 2020-07-14 2020-12-30 федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВО "НИУ "МЭИ") Режекторный волноводный СВЧ-фильтр
RU2745591C1 (ru) * 2020-08-17 2021-03-29 федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВО "НИУ "МЭИ") Устройство для измерения собственной добротности диэлектрического резонатора

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Also Published As

Publication number Publication date
FR938693A (fr) 1948-10-21
DE818384C (de) 1951-10-25
BE468045A (en(2012))
US2740094A (en) 1956-03-27
US2434646A (en) 1948-01-20
US2530691A (en) 1950-11-21
GB578597A (en) 1946-07-04
US2503549A (en) 1950-04-11
US2588226A (en) 1952-03-04
CH265036A (fr) 1949-11-15

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