US2435442A - Tuning arrangement for concentric transmission line resonators - Google Patents

Tuning arrangement for concentric transmission line resonators Download PDF

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Publication number
US2435442A
US2435442A US515345A US51534543A US2435442A US 2435442 A US2435442 A US 2435442A US 515345 A US515345 A US 515345A US 51534543 A US51534543 A US 51534543A US 2435442 A US2435442 A US 2435442A
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United States
Prior art keywords
transmission line
concentric transmission
conductors
tuning arrangement
conductor
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
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US515345A
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English (en)
Inventor
Anatole M Gurewitsch
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General Electric Co
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General Electric Co
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Filing date
Publication date
Priority to FR962088D priority Critical patent/FR962088A/fr
Application filed by General Electric Co filed Critical General Electric Co
Priority to US515345A priority patent/US2435442A/en
Application granted granted Critical
Publication of US2435442A publication Critical patent/US2435442A/en
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Expired - Lifetime legal-status Critical Current

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    • 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

Definitions

  • This invention relates to space resonant cavities of the concentric transmission line type, and in particular to arrangements for tuning such space resonant cavities.
  • a space resonant cavity of the type comprising a tubular outer conductor and a centrally disposed inner conductor may be excited by means of suitable exciting means, such as an electron discharge device, to establish transverse electromagnetic waves between the inner and outer conductors.
  • suitable exciting means such as an electron discharge device
  • the frequency of the space resonant system thus dened may be adjusted by adjustment of the electrical length of the concentric transmission line.
  • tuning plungers for adjusting the length of such lines and of the capacitive type have been employed, the tuning plunger usually consisting of a cylindrical sleeve interposed' between the inner and outer conductors and adjustably supported on one of these conductors.
  • This sleeve forms a short section of transmission line with each of the conductors, the two sections of transmission line being connected in series for electromagnetic waves within the resonant cavity. It is apparent that in such a system the sections of transmission line formed by the plunger are of fixed length and, hence, optimum performance is obtained at only one frequency.
  • Fig. 1 is a longitudinal sectional view of a con- Acentric transmission line cavity resonator embodying one of my improved capacitive tuners
  • Fig. 2 is a cross-section of the capacitive tuner of Fig. 1 along the line 2 2
  • Fig. 3 is a graph illustrating the tracking characteristic of the ultra high frequency arrangement of Fig. 1.
  • an ultra high frequency space resonant system of the concentric transmission line type comprising a tubular outer conductor I and a centrally disposed inner conductor II.
  • Electromagnetic waves of the TEM, or transverse electromagnetic, type are established in the region between the conductors III and I I by any suitable exciting means, such as the electron discharge device I2 having its anode I3 connected to outer conductor I Il and its control electrode I4 connected for alternating currents to inner conductor II ⁇ .
  • the outer conductor I0 preferably, is operated at ground potential and anode potential is supplied to anode I3 over a conductor I5.
  • the cathode of the device may be connected to ground for alternating currents through bypass capacitor I6 and to a source of negative potential for unidirectional currents by means of a lead I l.
  • the exact form of the electron discharge device employed for establishing electromagnetic waves between the conductors III and I I forms no part of the present invention and any suitable electron discharge device may be employed for this purpose.
  • the electrodes themselves of the device I2 form a part of the boundary of the space resonant system.
  • the space resonant region between the conductors Ill and II may be adjusted to resonate at a desired frequency by means of a cup-like metallic plunger 20 slidably supported on inner conductor II and comprising a cylindrical sleeve portion 2I concentrically disposed between the inner and outer conductorsand extending longitudinally between these conductors, and an end wall 22 connecting the sleeve 2 I' to the conductor II.
  • the longitudinal position of the plunger 20 along the concentric transmission line dened by the conductors I0 and II may be adjusted by any suitable adjusting means, one form of which is illustrated in the drawing as a pair of rods 23.
  • the sleeve 2l concentrically disposed between the conductors I0 and II forms therewith a pair of short sections of concentric transmission line, one of which is defined by the outer surface of sleeve 2
  • These sections of transmission line are serially connected between the space resonant cavity to the left of the end wall 22 and the right-hand side of the end wall '22.
  • the end wall 22 forms a short-circuit across the end of these serially connected sections of transmission line.

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US515345A 1943-12-23 1943-12-23 Tuning arrangement for concentric transmission line resonators Expired - Lifetime US2435442A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR962088D FR962088A (enrdf_load_stackoverflow) 1943-12-23
US515345A US2435442A (en) 1943-12-23 1943-12-23 Tuning arrangement for concentric transmission line resonators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US515345A US2435442A (en) 1943-12-23 1943-12-23 Tuning arrangement for concentric transmission line resonators

Publications (1)

Publication Number Publication Date
US2435442A true US2435442A (en) 1948-02-03

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ID=24050962

Family Applications (1)

Application Number Title Priority Date Filing Date
US515345A Expired - Lifetime US2435442A (en) 1943-12-23 1943-12-23 Tuning arrangement for concentric transmission line resonators

Country Status (2)

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US (1) US2435442A (enrdf_load_stackoverflow)
FR (1) FR962088A (enrdf_load_stackoverflow)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2540634A (en) * 1947-11-15 1951-02-06 Rca Corp Concentric line resonator circuit and means for coupling thereto
US2589246A (en) * 1944-12-29 1952-03-18 Us Sec War Oscillator
US2627550A (en) * 1949-05-18 1953-02-03 Bell Telephone Labor Inc Adjustable impedance transformer
US2641647A (en) * 1949-06-14 1953-06-09 Motorola Inc Tuning device
US2653299A (en) * 1942-02-04 1953-09-22 Sperry Corp High-frequency power measuring apparatus
US2715211A (en) * 1950-02-02 1955-08-09 Rca Corp Ultra high frequency tuning systems
US2774045A (en) * 1951-10-17 1956-12-11 Gen Electric Ultra-high-frequency tuner
US2806211A (en) * 1953-02-26 1957-09-10 Hazeltine Research Inc High-frequency wave-signal tuning device
US3413577A (en) * 1966-07-28 1968-11-26 Automatic Elect Lab Absorption wavemeter
US4039982A (en) * 1974-11-01 1977-08-02 Continental Electronics Manufacturing Company Coaxial cavity radio frequency tuning circuit having a toroidal-shaped electrode to effect tuning
DE3315474A1 (de) * 1982-04-30 1983-11-10 RCA Corp., 10020 New York, N.Y. Abstimmbarer leitungsresonator
EP0580193A3 (en) * 1992-06-05 1994-07-06 For E M S P A Thermal compensation of wave guide resonant cavities
US20120116397A1 (en) * 2010-11-08 2012-05-10 Bovie Medical Corporation Electrosurgical apparatus with retractable blade
US9144453B2 (en) 2010-11-08 2015-09-29 Bovie Medical Corporation Multi-mode electrosurgical apparatus
US9326810B2 (en) 2010-11-08 2016-05-03 Bovie Medical Corporation Multi-button electrosurgical apparatus
US9763724B2 (en) 2012-07-02 2017-09-19 Bovie Medical Corporation Systems and methods of discriminating between argon and helium gases for enhanced safety of medical devices
US9770285B2 (en) 2010-11-08 2017-09-26 Bovie Medical Corporation System and method for identifying and controlling an electrosurgical apparatus
US11272973B2 (en) 2015-01-28 2022-03-15 Apyx Medical Corporation Cold plasma electrosurgical apparatus with bent tip applicator
US11602390B2 (en) 2017-01-30 2023-03-14 Apyx Medical Corporation Electrosurgical apparatus with flexible shaft
US11877788B2 (en) 2017-05-30 2024-01-23 Apyx Medical Corporation Electrosurgical apparatus with robotic tip

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2717362A (en) * 1950-05-02 1955-09-06 Hazeltine Research Inc High-frequency wave-signal tuning device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1955093A (en) * 1929-07-06 1934-04-17 Telefunken Gmbh Oscillation circuit for electric waves
US2171219A (en) * 1937-12-30 1939-08-29 Rca Corp High frequency condenser

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1955093A (en) * 1929-07-06 1934-04-17 Telefunken Gmbh Oscillation circuit for electric waves
US2171219A (en) * 1937-12-30 1939-08-29 Rca Corp High frequency condenser

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2653299A (en) * 1942-02-04 1953-09-22 Sperry Corp High-frequency power measuring apparatus
US2589246A (en) * 1944-12-29 1952-03-18 Us Sec War Oscillator
US2540634A (en) * 1947-11-15 1951-02-06 Rca Corp Concentric line resonator circuit and means for coupling thereto
US2627550A (en) * 1949-05-18 1953-02-03 Bell Telephone Labor Inc Adjustable impedance transformer
US2641647A (en) * 1949-06-14 1953-06-09 Motorola Inc Tuning device
US2715211A (en) * 1950-02-02 1955-08-09 Rca Corp Ultra high frequency tuning systems
US2774045A (en) * 1951-10-17 1956-12-11 Gen Electric Ultra-high-frequency tuner
US2806211A (en) * 1953-02-26 1957-09-10 Hazeltine Research Inc High-frequency wave-signal tuning device
US3413577A (en) * 1966-07-28 1968-11-26 Automatic Elect Lab Absorption wavemeter
US4039982A (en) * 1974-11-01 1977-08-02 Continental Electronics Manufacturing Company Coaxial cavity radio frequency tuning circuit having a toroidal-shaped electrode to effect tuning
DE3315474A1 (de) * 1982-04-30 1983-11-10 RCA Corp., 10020 New York, N.Y. Abstimmbarer leitungsresonator
US4451806A (en) * 1982-04-30 1984-05-29 Rca Corporation Tuning means for a transmisson line cavity
EP0580193A3 (en) * 1992-06-05 1994-07-06 For E M S P A Thermal compensation of wave guide resonant cavities
US9770285B2 (en) 2010-11-08 2017-09-26 Bovie Medical Corporation System and method for identifying and controlling an electrosurgical apparatus
US9060765B2 (en) * 2010-11-08 2015-06-23 Bovie Medical Corporation Electrosurgical apparatus with retractable blade
US9144453B2 (en) 2010-11-08 2015-09-29 Bovie Medical Corporation Multi-mode electrosurgical apparatus
US9326810B2 (en) 2010-11-08 2016-05-03 Bovie Medical Corporation Multi-button electrosurgical apparatus
US9770281B2 (en) 2010-11-08 2017-09-26 Bovie Medical Corporation Electrosurgical apparatus with retractable blade
US20120116397A1 (en) * 2010-11-08 2012-05-10 Bovie Medical Corporation Electrosurgical apparatus with retractable blade
US10064675B2 (en) 2010-11-08 2018-09-04 Bovie Medical Corporation Multi-mode electrosurgical apparatus
US10881444B2 (en) 2010-11-08 2021-01-05 Apyx Medical Corporation Electrosurgical apparatus with retractable blade
US11903630B2 (en) 2010-11-08 2024-02-20 Apyx Medical Corporation Electrosurgical apparatus with retractable blade
US9763724B2 (en) 2012-07-02 2017-09-19 Bovie Medical Corporation Systems and methods of discriminating between argon and helium gases for enhanced safety of medical devices
US11272973B2 (en) 2015-01-28 2022-03-15 Apyx Medical Corporation Cold plasma electrosurgical apparatus with bent tip applicator
US11602390B2 (en) 2017-01-30 2023-03-14 Apyx Medical Corporation Electrosurgical apparatus with flexible shaft
US11877788B2 (en) 2017-05-30 2024-01-23 Apyx Medical Corporation Electrosurgical apparatus with robotic tip

Also Published As

Publication number Publication date
FR962088A (enrdf_load_stackoverflow) 1950-05-31

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