US2765444A - High frequency circuit arrangements - Google Patents

High frequency circuit arrangements Download PDF

Info

Publication number
US2765444A
US2765444A US22615951A US2765444A US 2765444 A US2765444 A US 2765444A US 22615951 A US22615951 A US 22615951A US 2765444 A US2765444 A US 2765444A
Authority
US
United States
Prior art keywords
high frequency
frequency circuit
conductor
anodes
circuit arrangements
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
Other languages
English (en)
Inventor
Green Ernest
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconi Co Ltd
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
Application filed by Marconi Co Ltd filed Critical Marconi Co Ltd
Application granted granted Critical
Publication of US2765444A publication Critical patent/US2765444A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • 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

Definitions

  • This invention relates to high frequency circuit arrangements and has for its object to provide improved arrangements for feeding high frequency currents to points which are required to be at the same radio frequency potential both as regards amplitude and phase but which are, for unavoidable design or other reasons, spaced apart.
  • the invention is particularly applicable to, and primarily intended for, high frequency amplifiers and oscillators and especially amplifiers and oscillators for high power radio transmitters where it is desired to operate valves in parallel.
  • the corresponding electrodes of the parallel valves shall be at the same radio frequency potential both as to amplitude and phase. Especially is this important as respects the anodes.
  • the present invention seeks to solve these difliculties.
  • V1, V2, V3 and V4 represent the anodes of pairs of valves, the pairs (V1, V2 on the one hand and V3, V4 on the other) being in push-pull and the valves of each pair (V1 and V2 or V3 and V4) being in parallel.
  • L represents an inductance connected at one side of the valve assembly and K a tuning condenser arrangement on the other, connection being made to the anodes by leads (in practice connection bars or strips) which pass through the points A, B, C, D.
  • the size of the valve anodes is such that the distance between their centers is appreciable and there is accordingly an appreciable voltage drop between the points A and B and between C and D,
  • the main high frequency current flows into the assembly from the inductance L and, owing to the inductive voltage drop in AB and CD, the voltage swing of the anodes of the valves V1 and V3 is higher than that of the anodes of valves V2 and V4 with the result that there is unequal loading of the valves.
  • connection is made to said elements by means including a reentrant conductor the re-entrant portion of which is in mutual inductance relationship with the outgoing portion, and the said elements are connected to different points in the length of said re-entrant portion.
  • the re-entrant portion may be made longer than is necessary for compensation and a bridge connection, which may be adjustable in position, provided between the outgoing portion and the re-entrant portion so as to enable the best degree of compensation to be obtained in situ by trial and error.
  • Fig. 2 shows an arrangement like that of Fig. 1 but modified to be in accordance with this invention. Since like references are used for like parts throughout the figures, Fig. 2 will be found largely self-explanatory. As will be seen the straight conductors of Fig. l are replaced by re-entrant conductors connected to the valves as shown. The conductor parts VW or XY are in close proximity to the conductor parts AB and CD. The inner conductor parts i. e. VW and XY carry the main circulating current 11 while the outer parts AB, CD carry a current I2 which is less than I1.
  • the radio frequency voltage difference between V1 and V2 or V3 and V4 can be made negligible. If L is the inductance of the part AB or CD and M is the mutual inductance between AB and VW or between DC and XY the voltage difference between V1 and V2 or between V3 and V4 will be Where w is the operating frequency in angular measure.
  • Fig. 3 difiers from Fig. 2 only in that the re-entrant portions AB and DC are longer than is necessary for compensation, correct compensation being obtained by adjusting the position of adjustable bridge connectors P as illustrated.
  • the invention is, of course, not limited to its application to the connection of valve anodes but may be used for connecting other corresponding electrodes such as grids or cathodesor, in general, any points-which are required to be maintained at the same radio frequency potential.
  • a high frequency circuit arrangement for connecting a pair of similar electron discharge tubes each including an anode comprising high frequency connection means for feeding high frequency Waves to said anodes, one in each of said tubes, said high frequency connection means including a conductor having a bent-back portion at one end to which the anodes of said discharge tubes are connected at diiferent and spaced points, input means connected to the end of said conductor remote from said one end, the bent-back portion of said conductor having mutual inductive coupling with the remaining portion of the conductor and being so spaced from the remaining portion of the conductor that the inductive coupling is suflicient to compensate for the dilference in the voltage drop along the conductor to the respective anodes.
  • bent-back portion has a length substantially exceeding a length sufficient to compensate for the difference in the voltage drop along the conductor to the respective anodes and a conductive bridge connection extending between the bent-back portion and the remaining portion of said conductor for obtaining correct compensation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Microwave Amplifiers (AREA)
US22615951 1950-06-02 1951-05-14 High frequency circuit arrangements Expired - Lifetime US2765444A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1387750A GB681933A (en) 1950-06-02 1950-06-02 Improvements in or relating to high frequency circuit arrangements

Publications (1)

Publication Number Publication Date
US2765444A true US2765444A (en) 1956-10-02

Family

ID=10030996

Family Applications (1)

Application Number Title Priority Date Filing Date
US22615951 Expired - Lifetime US2765444A (en) 1950-06-02 1951-05-14 High frequency circuit arrangements

Country Status (3)

Country Link
US (1) US2765444A (en)van)
GB (1) GB681933A (en)van)
NL (1) NL82347C (en)van)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925477A (en) * 1957-09-12 1960-02-16 Radiation Inc Radio frequency amplifier

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB218570A (en) * 1923-12-17 1924-07-10 Ringsdorff Werke A G Electric resistance coils free from induction and capacity
US1778395A (en) * 1928-03-23 1930-10-14 Rca Corp Coupling device
DE560129C (de) * 1932-03-01 1932-09-28 Ernst Gerhard Dr Induktive Kopplungsanordnung fuer mehrere Ultrakurzwellenroehren
US2147809A (en) * 1937-05-04 1939-02-21 Mackay Radio & Telegraph Co High frequency bridge circuits and high frequency repeaters
US2158822A (en) * 1936-03-16 1939-05-16 Warren C Hill Radio frequency selection and oscillatory amplification element
FR902884A (fr) * 1943-02-27 1945-09-14 Philips Nv Ligne de transmission à haute fréquence
US2497854A (en) * 1943-02-25 1950-02-21 Melvin D Baller Ultra high frequency ring oscillator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB218570A (en) * 1923-12-17 1924-07-10 Ringsdorff Werke A G Electric resistance coils free from induction and capacity
US1778395A (en) * 1928-03-23 1930-10-14 Rca Corp Coupling device
DE560129C (de) * 1932-03-01 1932-09-28 Ernst Gerhard Dr Induktive Kopplungsanordnung fuer mehrere Ultrakurzwellenroehren
US2158822A (en) * 1936-03-16 1939-05-16 Warren C Hill Radio frequency selection and oscillatory amplification element
US2147809A (en) * 1937-05-04 1939-02-21 Mackay Radio & Telegraph Co High frequency bridge circuits and high frequency repeaters
US2497854A (en) * 1943-02-25 1950-02-21 Melvin D Baller Ultra high frequency ring oscillator
FR902884A (fr) * 1943-02-27 1945-09-14 Philips Nv Ligne de transmission à haute fréquence

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925477A (en) * 1957-09-12 1960-02-16 Radiation Inc Radio frequency amplifier

Also Published As

Publication number Publication date
GB681933A (en) 1952-10-29
NL82347C (en)van) 1900-01-01

Similar Documents

Publication Publication Date Title
US2404261A (en) Ultra high frequency system
US2235414A (en) Thermionic valve circuits
USRE20189E (en) Oscillation circuit for electric
US2262365A (en) Ultra-high-frequency tank circuit
US2153205A (en) Tuning arrangement
US2434115A (en) Electric discharge device and coaxial line cavity resonator therefor
US2765444A (en) High frequency circuit arrangements
US2594167A (en) Ultrahigh-frequency bridge circuits
US2463724A (en) Electron discharge circuit having folded anode inductors
US2218309A (en) Thermionic valve apparatus for use on very short wave lengths
US2092069A (en) Ultra-short wave radio system
US2226694A (en) Neutralization circuit for short wave transmitters
US2505251A (en) Superheterodyne receiver for very short waves
US2314132A (en) High frequency amplifier
US2156261A (en) Resonant circuit for ultra high frequency amplifiers
US2591982A (en) Superheterodyne receiver for very short waves
US2333659A (en) Shielding for high frequency switches
US2419882A (en) Wide band interstage coupling network
US2398502A (en) Oscillation generation
US2247216A (en) Resonant line control oscillation generator
US2446003A (en) High-frequency coupling device
US2163582A (en) Short wave transmitter
GB657487A (en) Improvements in and relating to magnetrons
US1941543A (en) High frequency radio signaling apparatus
US2573517A (en) Ultrahigh-frequency circuit arrangement comprising a discharge tube