GB558454A - Improvements relating to frequency control in ultra-high-frequency circuits - Google Patents

Improvements relating to frequency control in ultra-high-frequency circuits

Info

Publication number
GB558454A
GB558454A GB3186/40A GB318640A GB558454A GB 558454 A GB558454 A GB 558454A GB 3186/40 A GB3186/40 A GB 3186/40A GB 318640 A GB318640 A GB 318640A GB 558454 A GB558454 A GB 558454A
Authority
GB
United Kingdom
Prior art keywords
lecher
control
frequency
space charge
ultra
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
Application number
GB3186/40A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 NL136703D priority Critical patent/NL136703B/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB3186/40A priority patent/GB558454A/en
Priority to US513355A priority patent/US2397701A/en
Publication of GB558454A publication Critical patent/GB558454A/en
Priority to FR942934D priority patent/FR942934A/en
Priority to BE472809D priority patent/BE472809A/xx
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • H03J7/14—Controlling the magnetic state of inductor cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B17/00—Hoistway equipment
    • B66B17/14—Applications of loading and unloading equipment
    • B66B17/26—Applications of loading and unloading equipment for loading or unloading mining-hoist skips
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/02—Lecher 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/10—Angle modulation by means of variable impedance
    • H03C3/12—Angle modulation by means of variable impedance by means of a variable reactive element
    • H03C3/14—Angle modulation by means of variable impedance by means of a variable reactive element simulated by circuit comprising active element with at least three electrodes, e.g. reactance-tube circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C7/00—Modulating electromagnetic waves
    • H03C7/02—Modulating electromagnetic waves in transmission lines, waveguides, cavity resonators or radiation fields of antennas
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/54—Amplifiers using transit-time effect in tubes or semiconductor devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H5/00—One-port networks comprising only passive electrical elements as network components
    • H03H5/003—One-port networks comprising only passive electrical elements as network components comprising distributed impedance elements together with lumped impedance elements

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

558,454. Valve generating circuits. STANDARD TELEPHONES & CABLES, Ltd., and SMYTH, C. N. Feb. 20, 1940, No. 3186. [Class 40 (v)] An ultra high frequency generator having a tuned regenerative feedback comprising distributed impedances, such as Lecher wires, co-axial lines and hollow resonators, is provided with means to control the tuning by varying the dielectric constant of at least a portion of the distributed impedances while maintaining the permeability constant. The Figure shows an oscillator OSC associated with a Lecher wire system L3, L4, having extensions into a vacuum tube T in which a space charge is produced by cathode K, control grid G1 and screen grid G2. The Lecher wires are biased through resistances R so as not to draw current during any part of the cycle and vary in effective electrical length with the distribution or density of the space charge.
GB3186/40A 1940-02-20 1940-02-20 Improvements relating to frequency control in ultra-high-frequency circuits Expired GB558454A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL136703D NL136703B (en) 1940-02-20
GB3186/40A GB558454A (en) 1940-02-20 1940-02-20 Improvements relating to frequency control in ultra-high-frequency circuits
US513355A US2397701A (en) 1940-02-20 1943-12-08 Frequency control in ultra high frequency circuit
FR942934D FR942934A (en) 1940-02-20 1947-01-22 Frequency control in very high frequency setups
BE472809D BE472809A (en) 1940-02-20 1947-04-25

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3186/40A GB558454A (en) 1940-02-20 1940-02-20 Improvements relating to frequency control in ultra-high-frequency circuits

Publications (1)

Publication Number Publication Date
GB558454A true GB558454A (en) 1944-01-06

Family

ID=32109231

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3186/40A Expired GB558454A (en) 1940-02-20 1940-02-20 Improvements relating to frequency control in ultra-high-frequency circuits

Country Status (5)

Country Link
US (1) US2397701A (en)
BE (1) BE472809A (en)
FR (1) FR942934A (en)
GB (1) GB558454A (en)
NL (1) NL136703B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE458146A (en) * 1945-02-08
US2568395A (en) * 1948-08-30 1951-09-18 Rca Corp Controlled wave energy generator
AU2001290521A1 (en) 2000-07-31 2002-02-13 Firewall Forward Technologies, Llc Camshaft lubrication system

Also Published As

Publication number Publication date
BE472809A (en) 1947-10-25
US2397701A (en) 1946-04-02
NL136703B (en)
FR942934A (en) 1949-02-22

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