US3129387A - Wide-band distributed amplifiers - Google Patents

Wide-band distributed amplifiers Download PDF

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Publication number
US3129387A
US3129387A US821560A US82156059A US3129387A US 3129387 A US3129387 A US 3129387A US 821560 A US821560 A US 821560A US 82156059 A US82156059 A US 82156059A US 3129387 A US3129387 A US 3129387A
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United States
Prior art keywords
filter
output
line
valves
sections
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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US821560A
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English (en)
Inventor
Sosin Boleslaw Marian
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi Co Ltd
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Publication date
Application filed by Marconi Co Ltd filed Critical Marconi Co Ltd
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Publication of US3129387A publication Critical patent/US3129387A/en
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
    • H03F1/18—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of distributed coupling, i.e. distributed amplifiers
    • H03F1/20—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of distributed coupling, i.e. distributed amplifiers in discharge-tube amplifiers

Definitions

  • the anode filter line or chain comprises two parts. One part is of uniform :characteristic impedance and comprises series arm inductances ⁇ L2 and shunt arms constituted by the output capacities (not represented) of the ⁇ valves V1, V2 and V3. R2 is a terminating resista-nce.
  • the other par-t ⁇ of the output or anode filter chain has a characteristic impedance tapered towards the load and comprises ser-ies arm inductances L3, L4, L and L6 and shunt arms consisting of condensers C1, C2, C3, C4 and C5 in parallel with the output capacities of valves V4, V5, V6, V7 and V8 respectively.
  • the tape-red part of the output filter is correctly terminated by a matching network and load (which are not shown) connected to terminal 2, from which the output is taken.
  • Inductances L1 are chosen to constitute in conjunction with the input capacities of the valves a filter of suitable pass band and characteristic impedance.
  • the parameters of the output filter chain are such as to provide suitable characteristic impedances and pass band, and the anodes of the valves are connected to this filter chain at such points that the phase delay between the anodes of adjacent valves is substantially the same as the phase delay between their corresponding control grids.
  • the tapered portion of the output filter is so dimensioned that its characteristic impedance decreases Iin steps, lthe actual values of the characteristic impedances from -step to step being chosen in dependence on the valve characteristics according to well known theory.
  • screen grid valves are illustrated other types may be used.
  • a pair of triodes in cascode connection may be substituted for each valve shown.
  • filters illustrated in FIG. 1 are low pass filters, other forms of band pass filters may be used.
  • FIG. 2 A pushpull embodiment of the invention is illustrated by FIG. 2.
  • the blocks A represent amplifiers each as described with reference to and illustrated in FIG. 1.
  • Input signals are fed through a matching network (not shown) to the primary terminals 3 of an input transformer T1 having a secondary winding with an earthed centre tap.
  • the secondary winding terminals 1 are connected to the grids of the first valves of the amplifiers A.
  • Output signals are taken from the anode terminals 2 of the :last valves of the amplifiers A to the ends of the primary winding of an output transformer T2.
  • the centre point of this winding is earthed and output is taken from the secondary winding to output terminals 4, -to which are connected a matching network (not shown) and the load (also not shown).
  • the transformers T1 and T2 are of course designed to pass signals the required band of frequencies and to matchy the impedances to which they are connected.
  • Matching networks may be connected to the input and output sides of the amplifiers A or the transformers T1 and T2 may be designed, in manner well known per se, themselves to provide impedance matching.
  • a distributed amplifier comprising an input filter line including a plurality of filter sections each having a pre-determined pass band; an output filter line having .4 a pre-determined pass band which includes a band of frequencies which is also included in the pass band of the input filter line; a load cnnected to said output filter line; said output lter line including a plurality of filter sections nearer the load of characteristic impedance decreasing stepwise towards the load and a plurality of filter sections farther from the load of uniform characteristic impedance; a plurality of valves having their control electrodes connected to different filter sections along said input filter line and their anodes connected to different filter sections of uniform impedance and a second plurality of valves having their control electrodes connected to different filter sections along said input filter line and their ⁇ anodes connected to different filter sections of decreasing impedance along said output filter line, wherein the delays between said anodes are substantially the same as the delays between the corresponding control electrodes; means for applying signals to said input filter line; and means for taking output from said output filter line.
  • a distributed amplifier comprising an output line including an output terminal at one end, a lplurality of valves connected to spaced points lalong said output line to feed output energy to the output terminal thereof, said line including a plurality of filter sections, remote from said output terminal, of uniform characteristic impedance and a plurality of filter sections, nearer said output terminal, of tapered decreasing characteristic impedance, said plurality of valves including a first group of valves having their anodes connected to different ones of said first mentioned plural-ity of filter sections and a second group of valves having their anodes connected to different ones of said last mentioned plurality of filter sections, said amplifier including an input filter line havin-g.
  • valves hav-ing their control electrodes connected to different filter sections of said input line to receive signals through different ones of said input line filter sections wherein the delays between said anodes are substantially the same as the delays between the corresponding control electrodes.
  • a push-pull amplier larrangement comprising two substantially identical amplifiers, each amplifier having an input filter line including a plurality of filter sections each having a predetermined pass band, an output filter line including a plurality of filter sections having a predetermined pass band which includes a band of frequencies which is also included in the pass band of the input filter line, an output terminal connected -to said output line, said output filter line including a plurality of filter sections nearer the output terminal of characteristic impedance decreasing stepwise toward the output terminal and a plurality of filter sections farther from the output terminal of uniform characteristic impedance, a plurality of valves having their control electrodes connected to different filter sections along said input filter line, a portion of said plurality of valves having their 5 6 anodes connected to one of said plurality of -flter sections 2,745,004 Yeo Pay Yu May 8, 1956 having decreasing stepwise impedance and another por- 2,778,8187 Bradley Jan. 27, 1957 tion 0f the valves having their anodes connected to lter 2,930,98

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Microwave Amplifiers (AREA)
US821560A 1958-07-23 1959-06-19 Wide-band distributed amplifiers Expired - Lifetime US3129387A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB23688/58A GB846633A (en) 1958-07-23 1958-07-23 Improvements in or relating to wide-band amplifiers

Publications (1)

Publication Number Publication Date
US3129387A true US3129387A (en) 1964-04-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
US821560A Expired - Lifetime US3129387A (en) 1958-07-23 1959-06-19 Wide-band distributed amplifiers

Country Status (7)

Country Link
US (1) US3129387A (fr)
CH (1) CH374397A (fr)
DE (1) DE1122590B (fr)
ES (1) ES250783A1 (fr)
FR (1) FR1231339A (fr)
GB (1) GB846633A (fr)
NL (1) NL241550A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3451004A (en) * 1966-06-29 1969-06-17 Us Army Distributed amplifier system
US3497825A (en) * 1966-09-26 1970-02-24 Sanders Associates Inc Distributed amplifier
US4337439A (en) * 1978-11-14 1982-06-29 The Marconi Company Limited Wide band amplifiers
US4668920A (en) * 1984-09-24 1987-05-26 Tektronix, Inc. Power divider/combiner circuit
US20120081182A1 (en) * 2004-11-23 2012-04-05 Bae Systems Information & Electronic Systems Integration, Inc. Broadband high power amplifier
RU2766324C1 (ru) * 2021-06-17 2022-03-15 Акционерное общество научно-внедренческое предприятие «ПРОТЕК» Полосовой усилитель мощности УВЧ- и СВЧ- диапазонов с автобалансировкой плеч выходного каскада с квадратурным сумматором

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1222997B (de) * 1963-07-26 1966-08-18 Siemens Ag Verstaerkerelemente fuer Gegentakt-Kettenverstaerker
AT249113B (de) * 1963-07-26 1966-09-12 Siemens Ag Gegentakt-Kettenverstärker
GB2143392A (en) * 1983-05-27 1985-02-06 Gen Electric Co Plc Microwave transistor distributed amplifiers

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2593948A (en) * 1951-03-07 1952-04-22 Atomic Energy Commission Distributed coincidence circuit
US2670408A (en) * 1950-11-15 1954-02-23 George G Kelley Coupling stage for distributed amplifier stages
US2745004A (en) * 1952-10-06 1956-05-08 Du Mont Allen B Lab Inc Variable pulse delay circuit
US2778887A (en) * 1952-12-30 1957-01-22 Melpar Inc Distributed amplifier transmission line terminations
US2930986A (en) * 1956-02-29 1960-03-29 Tektronix Inc Distributed amplifier

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB623175A (en) * 1944-06-30 1949-05-13 Gen Electric Co Ltd Improvements in thermionic valve amplifiers
DE924572C (de) * 1953-06-26 1955-03-03 Telefunken Gmbh Kettenverstaerker

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2670408A (en) * 1950-11-15 1954-02-23 George G Kelley Coupling stage for distributed amplifier stages
US2593948A (en) * 1951-03-07 1952-04-22 Atomic Energy Commission Distributed coincidence circuit
US2745004A (en) * 1952-10-06 1956-05-08 Du Mont Allen B Lab Inc Variable pulse delay circuit
US2778887A (en) * 1952-12-30 1957-01-22 Melpar Inc Distributed amplifier transmission line terminations
US2930986A (en) * 1956-02-29 1960-03-29 Tektronix Inc Distributed amplifier

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3451004A (en) * 1966-06-29 1969-06-17 Us Army Distributed amplifier system
US3497825A (en) * 1966-09-26 1970-02-24 Sanders Associates Inc Distributed amplifier
US4337439A (en) * 1978-11-14 1982-06-29 The Marconi Company Limited Wide band amplifiers
US4668920A (en) * 1984-09-24 1987-05-26 Tektronix, Inc. Power divider/combiner circuit
US20120081182A1 (en) * 2004-11-23 2012-04-05 Bae Systems Information & Electronic Systems Integration, Inc. Broadband high power amplifier
US8576009B2 (en) * 2004-11-23 2013-11-05 Schilmass Co. L.L.C. Broadband high power amplifier
RU2766324C1 (ru) * 2021-06-17 2022-03-15 Акционерное общество научно-внедренческое предприятие «ПРОТЕК» Полосовой усилитель мощности УВЧ- и СВЧ- диапазонов с автобалансировкой плеч выходного каскада с квадратурным сумматором

Also Published As

Publication number Publication date
FR1231339A (fr) 1960-09-28
GB846633A (en) 1960-08-31
DE1122590B (de) 1962-01-25
NL241550A (fr)
CH374397A (fr) 1964-01-15
ES250783A1 (es) 1959-12-01

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