US2181901A - Resonant line - Google Patents

Resonant line Download PDF

Info

Publication number
US2181901A
US2181901A US118971A US11897137A US2181901A US 2181901 A US2181901 A US 2181901A US 118971 A US118971 A US 118971A US 11897137 A US11897137 A US 11897137A US 2181901 A US2181901 A US 2181901A
Authority
US
United States
Prior art keywords
line
conductor
conductors
resonant
concentric
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
US118971A
Other languages
English (en)
Inventor
Nils E Lindenblad
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.)
RCA Corp
Original Assignee
RCA Corp
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 NL50891D priority Critical patent/NL50891C/xx
Application filed by RCA Corp filed Critical RCA Corp
Priority to US118971A priority patent/US2181901A/en
Priority to GB36154/37A priority patent/GB489598A/en
Priority to FR831568D priority patent/FR831568A/fr
Application granted granted Critical
Publication of US2181901A publication Critical patent/US2181901A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/04—Coaxial resonators
    • 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
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/18—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance
    • H03B5/1817—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a cavity resonator
    • H03B5/1835—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a cavity resonator the active element in the amplifier being a vacuum tube

Definitions

  • the present invention is designed to overcome the disadvantages of using long resonant lines and provides shortened line resonator which is compact and occupies little space. It is thus possible to use the shortened resonant line of ythe invention at lower frequencies than heretofore deemed practical previous types of resonant lines.
  • the shortened resonant line of the invention comprises a line which is folded concentrically instead of continuing in a straight line, as heretofore.
  • Figs. 1 and 2 illustrate two different embodiments of folded resonant lines in ,5,0 accordance'with the invention.
  • a resonant line comprising an outer cylindrical conductor i8, an inner conductor I4 at-the center, and intermediate cylindrical conductors II, I2 and I3. Cylindrical conductors I I andI I 3 1937, Serial No. '118,971
  • the diametrical ratios of the folded'sections of the lineas measured fromthe longitudinal axis ofthe line are made to be the same.
  • the ratio of the diametrical distances b is made equal to the ratio of the distances .E d n and to equal the ratio of the distances or l ib d f
  • the diametrical distance bl differs from c by the thickness of thelmaterial of the cylindrical wall I I and similarly d differs from e by the thickness ol the material of the cylindrical wall I2. If desired, the uniform line effect may be departed from and a concentrated or lumped reactance effect obtained by changing the diametrical ratios, especially if it is desired to still further reduce the total length of theA resonant line. A decreased diametrical ratiowill give an increased capacity per unit length of line.
  • the folding up feature may be combined with the provision of a lumped capacity, and where this is elfected, it is preferred thatvit be done at the free end of the line, i. e., at the last sectionfwhere the diametrical ratio between inner conductor I4 and cylindrical wall I3 may be made smaller than the ratios betweenv the other adjacent concentric surfaces.
  • the diametrical ratio between inner conductor I4 and cylindrical wall I3 may be made smaller than the ratios betweenv the other adjacent concentric surfaces.
  • the total length of the folded concentric resonant line of Fig. 1 be approximately onequarter the length of the communication wave; that is, the sum of the lengths of conductors II, I2, I3 'and lli, as measured from their respective bases I5 or I6 to which theyare. connected to their open ends, should be approximately onequarter the length of the operating wave.
  • the resonant line of Fig. 1 is herein shown as a frequency control line for the electron-discharge V device vacuum tube oscillator circuit connected to lead I1.
  • This external circuit is merely given for the purpose of illustration and is not to be construedas being limitative of the invention since the line may be used in other capacities, and other modes of coupling thereto may be provided.
  • capacitive coupling instead of the direct coupling over lead I1 we may provide capacitive coupling to the line at points of higher voltage, of which the free end of each fold is the extreme.
  • Two such methods of capacitive coupling comprise condenser I8 and conductor I9, shown in dotted lines connected to the free end of inner conductor IA, and condenser 2'and lead ,ZI shown.
  • dotted loops 22 and 23 which are connected near the outside of and close to the base of a fold where there is a large or relatively strong magnetic field.
  • the loop 23 is located,y
  • the magnetic coupling obtained by loops 22 and 23 be nearest the greatest ow of current withinl each space for each section in order to obtain close coupling. This effect of close coupling is greatest at the place where the iield gradient is greatest, and such a location will be near the smallest diameter wall of each section.
  • a looser magnetic coupling ⁇ may, of course, be obtained by coupling a loop at places other than that shown by loops 22 and 23, such as at ⁇ 24. It will thus be seen that i there may be provided eitherconductive, capacitive, or magnetic coupling, and various degrees of coupling.
  • FIG. 1 of the drawing shows the direction of thefiow of current, and it will be seen that the shell current 'in one section becomes the center conductor current in the next section.
  • Fig. 2 shows an alternative folded resonant line in accordance with the invention, where the next just the opposite shown in Fig. 1.
  • Fig. 2 a high voltage end at the largest diameter section and a high current end at the smallest diameter scc- ⁇ tion.
  • the external circuit may be coupled either ⁇ conductively, magnetically, or capacitively to the resonant line of Fig. 2 in a manner somewhat similar to that shown in Fig. 1; that is, the capacitive coupling may be effected at points of high voltage, whereas the magnetic coupling may 1 be eiected at points of greatest current flow.
  • a folded, resonant line comprising an outer'-v yconductor and a ⁇ concentric central conductor electrically coupled together at one end, and an intermediate concentric conductor constructedv and arranged to be electrically coupled to said 3 outerconductor at its other end, said intermedi.-
  • Afolded, concentric resonant line comprising an outer cylindrical conductorand'a central conductor, a mechanical and electrical connection between said conductors at one of theiradjacent ends, and an intermediate cylindrical conductor constructed and arranged to be mechanically and electrically coupled to the other end of said outer conductor, said intermediate conductor extending parallel to said central conductor for the greater portions of the lengths of the last two conductors, the sum of the lengths of said central and intermediate conductors having a predetermined relation to the wavelength of oscillation4 of said resonant line.
  • a folded, concentric resonant line comprising an outer conductor, an inner central conductor, and a plurality of intermediate concentric conductors parallel and surrounding the greater part of the length of said central conductor, adjacent ones of said intermediate conductors being so constructed and arranged as to be conductively connected at one of their respective ends Yto opposite ends of said outer conductor, the other ends of said intermediate conductors being free, alternately located ones of said conductors withinsaidl outer conductor being connected to the same end of said outer conductor.
  • a resonant line in accordance with claim 3 characterized iny this that said outer and inner conductors are cylindrical.
  • a folded, concentric resonant line comprisingan outer conductor, an inner central conductor, and a plurality of intermediate concentric conductors located within said outer conductor and between said outer conductor and said central conductor, adjacent o-nes of all of said inner conductors being connected at one of their respective ends to opposite ends of said outer conductor, the other ends of said inner conductors being free, alternately located ones of said inner conductors being connected to the same end of said outer conductor, said intermediate conductors being so arranged that the diametrical ratio measured from the longitudinal axis of said resonant line to any two adjacent surfaces of adjacent conductors is the same throughout said line.
  • a resonant line comprising an outer conductor and a concentric central conductor electrically coupled together at one end, an intermediate concentric conductor constructed and arranged to be electrically coupled to said outer conductor at its other end, and a utilization circuit conductively coupled to said intermediate .conductor in the interior of said resonant line at a location where there is substantially the greatest flow of current in said line.
  • a folded, concentric, rescnant line comprising an outer cylindrical conductor and a central conductor, a mechanical an'. electrical connection between said conductors ai one of their adjacent ends, an intermediate cylin drical conductor constructed and arranged to be mechanically and electrically coupled to the other end of said outer conductor, and a utilization cir cuit conductively coupled to a point of low potential on said line.
  • a resonant line comprising an outer conductor and a concentric central conductor electrically coupled together at one end, an intermediate, inner, concentric conductor electrically coupled to said outer conductor at its other end, and a utilization circuit conductively coupled to said intermediate conductor at a location near the junction of said intermediate conductor with said outer conductor, the sum of the lengths of said inner conductors being approximately one-quarter of the length of the wave to whose frequency the line is resonant.
  • a folded, concentric resonant line comprisving an outer conductor, an inner central conductor, and a plurality of intermediate, inner, concentric conductors, adjacent ones of said inner conductors being connected at one of their respective ends to opposite ends of said outer conductor, the other ends of said inner conductors Y being free, alternately located ones of said innerA conductors being connected to the same end of said outer conductor, the sum of the lengths of all of said inner conductors being approximately one-quarter of the length of the wave to whose frequency the line is resonant.
  • a resonant line comprising an outer conductor and a concentric central conductor electrically coupled together at one end, an intermediate inner concentric conductor electrically coupled to said outer conductor at its other end, the sum of the lengths of all of said inner conductors being approximately one-quarter of the length of the Wave to whose frequency the line is resonant.
  • a folded resonantline comprising an outer yconductor and a concentric central conductor to one of said first two conductors at its other end, said intermediate conductor being so constructed and arranged that the diametrical ratio measured from the longitudinal axis of said line to any two adjacent surfaces 0f adjacent conductors is the same throughout said line.
  • a compact concentric resonant line comprising an outer cylindrical conductor and a centrol conductor, a mechanical and electrical connection between said conductors at one of their adjacent ends, an intermediate cylindrical conductor constructed and arranged to be mechanically and electrically coupled to the other end of said outer conductor, the sum of the lengths of said central and intermediate conductors being related to the Wavelength of oscillation of said resonant line.

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
US118971A 1937-01-04 1937-01-04 Resonant line Expired - Lifetime US2181901A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL50891D NL50891C (enrdf_load_stackoverflow) 1937-01-04
US118971A US2181901A (en) 1937-01-04 1937-01-04 Resonant line
GB36154/37A GB489598A (en) 1937-01-04 1937-12-30 Improvements in or relating to resonant electrical lines
FR831568D FR831568A (fr) 1937-01-04 1938-01-03 Ligne résonante

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US118971A US2181901A (en) 1937-01-04 1937-01-04 Resonant line

Publications (1)

Publication Number Publication Date
US2181901A true US2181901A (en) 1939-12-05

Family

ID=22381867

Family Applications (1)

Application Number Title Priority Date Filing Date
US118971A Expired - Lifetime US2181901A (en) 1937-01-04 1937-01-04 Resonant line

Country Status (4)

Country Link
US (1) US2181901A (enrdf_load_stackoverflow)
FR (1) FR831568A (enrdf_load_stackoverflow)
GB (1) GB489598A (enrdf_load_stackoverflow)
NL (1) NL50891C (enrdf_load_stackoverflow)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2422160A (en) * 1944-06-13 1947-06-10 Rca Corp Variable reactance device for coaxial lines
US2689915A (en) * 1944-11-04 1954-09-21 Us Navy Folded line oscillator
US2790855A (en) * 1953-04-17 1957-04-30 Rca Corp Cavity resonator circuit
US2890425A (en) * 1957-04-30 1959-06-09 Hoffman Electronics Corp Cavity resonator construction or the like
US3448412A (en) * 1967-04-21 1969-06-03 Us Navy Miniaturized tunable resonator comprising intermeshing concentric tubular members
US3452293A (en) * 1966-10-24 1969-06-24 Collins Radio Co Dual-band transmission line tunable resonant tank circuit
US3657671A (en) * 1969-08-05 1972-04-18 Westinghouse Electric Corp Hybrid tunable cavity resonator
US4292610A (en) * 1979-01-26 1981-09-29 Matsushita Electric Industrial Co., Ltd. Temperature compensated coaxial resonator having inner, outer and intermediate conductors
EP2882033A1 (en) * 2013-12-09 2015-06-10 Centre National De La Recherche Scientifique Radio-frequency resonator and filter
JP2015173445A (ja) * 2014-03-11 2015-10-01 ウェーブ エレクトロニクス カンパニー リミテッド 垂直または水平方向に交差する隔壁構造を含む共振器およびそれを用いたフィルター
EP3104453A1 (en) * 2015-06-10 2016-12-14 Alcatel Lucent A resonator assembly and filter
EP3179552A1 (en) * 2015-12-10 2017-06-14 Alcatel Lucent A resonator assembly, a radio frequency filter and a method of radio-frequency filtering
US20170282861A1 (en) * 2014-12-18 2017-10-05 Kimblade Co.,Ltd. Wiper blade
EP3525281A4 (en) * 2016-10-25 2019-10-23 Huawei Technologies Co., Ltd. COMBINATOR AND ANTENNA DEVICE
CN112186323A (zh) * 2020-09-04 2021-01-05 广州司南天线设计研究所有限公司 微波谐振器和滤波器

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2422160A (en) * 1944-06-13 1947-06-10 Rca Corp Variable reactance device for coaxial lines
US2689915A (en) * 1944-11-04 1954-09-21 Us Navy Folded line oscillator
US2790855A (en) * 1953-04-17 1957-04-30 Rca Corp Cavity resonator circuit
US2890425A (en) * 1957-04-30 1959-06-09 Hoffman Electronics Corp Cavity resonator construction or the like
US3452293A (en) * 1966-10-24 1969-06-24 Collins Radio Co Dual-band transmission line tunable resonant tank circuit
US3448412A (en) * 1967-04-21 1969-06-03 Us Navy Miniaturized tunable resonator comprising intermeshing concentric tubular members
US3657671A (en) * 1969-08-05 1972-04-18 Westinghouse Electric Corp Hybrid tunable cavity resonator
US4292610A (en) * 1979-01-26 1981-09-29 Matsushita Electric Industrial Co., Ltd. Temperature compensated coaxial resonator having inner, outer and intermediate conductors
EP2882033A1 (en) * 2013-12-09 2015-06-10 Centre National De La Recherche Scientifique Radio-frequency resonator and filter
JP2015173445A (ja) * 2014-03-11 2015-10-01 ウェーブ エレクトロニクス カンパニー リミテッド 垂直または水平方向に交差する隔壁構造を含む共振器およびそれを用いたフィルター
US20170282861A1 (en) * 2014-12-18 2017-10-05 Kimblade Co.,Ltd. Wiper blade
EP3104453A1 (en) * 2015-06-10 2016-12-14 Alcatel Lucent A resonator assembly and filter
EP3104452A1 (en) * 2015-06-10 2016-12-14 Alcatel Lucent A resonator, a microwave frequency filter and a method of radio frequency filtering
WO2016198466A1 (en) * 2015-06-10 2016-12-15 Alcatel Lucent A resonator assembly and filter
EP3179552A1 (en) * 2015-12-10 2017-06-14 Alcatel Lucent A resonator assembly, a radio frequency filter and a method of radio-frequency filtering
EP3525281A4 (en) * 2016-10-25 2019-10-23 Huawei Technologies Co., Ltd. COMBINATOR AND ANTENNA DEVICE
US10938080B2 (en) 2016-10-25 2021-03-02 Huawei Technologies Co., Ltd. Combiner and antenna apparatus
CN112186323A (zh) * 2020-09-04 2021-01-05 广州司南天线设计研究所有限公司 微波谐振器和滤波器

Also Published As

Publication number Publication date
NL50891C (enrdf_load_stackoverflow)
FR831568A (fr) 1938-09-08
GB489598A (en) 1938-07-29

Similar Documents

Publication Publication Date Title
US2181901A (en) Resonant line
Hines High‐Frequency Negative‐Resistance Circuit Principles for Esaki Diode Applications
US2088722A (en) Vacuum tube with tank circuits
US2323201A (en) Tuned circuit and associated devices therefor
GB691580A (en) High q frequency tuner
US2411299A (en) High-frequency triode oscillator
US2589092A (en) Variable capacitor
USRE20189E (en) Oscillation circuit for electric
US2501052A (en) High-frequency transmission system
US2153205A (en) Tuning arrangement
US2530089A (en) Ultra high frequency resonant circuit
US2543891A (en) Variable ultra high frequency circuits
US3414833A (en) Electronically tunable high frequency network using pin diodes
US2426185A (en) Translation of microwaves
US3634790A (en) Parasitic mode suppressor
US2266500A (en) Energy transfer circuits
US2250308A (en) System for feeding a single utilization circuit with energy at two frequencies
US3188583A (en) Parallel plate line transition section between a coaxial line and a ridged waveguide
US2617038A (en) Ultrahigh-frequency device
US2525452A (en) Means for coupling concentric cavity resonators
US2414991A (en) Oscillation generator
US2395165A (en) High frequency transformer
US2253849A (en) Short wave radio apparatus
US2594895A (en) High-frequency short-circuiting arrangement
US3278868A (en) Cavity resonator