GB1436518A - Microwave power control apparatus and method - Google Patents

Microwave power control apparatus and method

Info

Publication number
GB1436518A
GB1436518A GB4069374A GB4069374A GB1436518A GB 1436518 A GB1436518 A GB 1436518A GB 4069374 A GB4069374 A GB 4069374A GB 4069374 A GB4069374 A GB 4069374A GB 1436518 A GB1436518 A GB 1436518A
Authority
GB
United Kingdom
Prior art keywords
load
absorptive
coupled
loads
active
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
GB4069374A
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.)
Varian Medical Systems Inc
Original Assignee
Varian Associates Inc
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 Varian Associates Inc filed Critical Varian Associates Inc
Publication of GB1436518A publication Critical patent/GB1436518A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/22—Attenuating devices
    • H01P1/222—Waveguide attenuators

Landscapes

  • Non-Reversible Transmitting Devices (AREA)
  • Constitution Of High-Frequency Heating (AREA)

Abstract

1436518 Variable microwave attenuators VARIAN ASSOCIATES 18 Sept 1974 [20 Sept 1973] 40693/74 Heading H1W A portion of the output energy of a microwave source is variably directed into an absorptive load and the rest into a useful (active) load. As shown, the source 10 and active load 34 are coupled to the arms 12, 32 of a waveguide fourport circulator 14 whilst the absorptive load 22 is coupled to an intermediate port 18 through an adjustable reactance in the form of a stub 28 and piston 30. The value of this reactance determines the ratio of energy distribution between the loads 22 and 34. A further absorptive load may be coupled to port 36 for interception of energy reflected from the active load 34. Both the absorptive loads may be water loads. The piston 30 may be automatically actuated by known means 42, 42 governed by command signals from an external source or from a power sensor in waveguide 32. The waveguides may be filled with sulphur hexafluoride.
GB4069374A 1973-09-20 1974-09-18 Microwave power control apparatus and method Expired GB1436518A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US399209A US3868602A (en) 1973-09-20 1973-09-20 Controllable microwave power attenuator

Publications (1)

Publication Number Publication Date
GB1436518A true GB1436518A (en) 1976-05-19

Family

ID=23578603

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4069374A Expired GB1436518A (en) 1973-09-20 1974-09-18 Microwave power control apparatus and method

Country Status (6)

Country Link
US (1) US3868602A (en)
JP (1) JPS5078250A (en)
CA (1) CA1015413A (en)
DE (1) DE2443427A1 (en)
FR (1) FR2258014B3 (en)
GB (1) GB1436518A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4219758A (en) * 1978-11-30 1980-08-26 Varian Associates, Inc. Traveling wave tube with non-reciprocal attenuating adjunct
DE2908218A1 (en) * 1979-03-02 1980-09-04 Siemens Ag ARRANGEMENT FOR SUPPRESSING RADIO SHAFTS AND HARMONICS IN HIKING FIELD TUBES WITH A SHORT-CIRCUIT VALVE IN THE OUTLET SIDE GUIDE
JPS5927596A (en) * 1982-08-04 1984-02-14 日本特殊陶業株式会社 Microwave absorber
US4710733A (en) * 1986-10-28 1987-12-01 Ford Aerospace & Communications Corporation r.f. Phase modulator
US6084226A (en) 1998-04-21 2000-07-04 Cem Corporation Use of continuously variable power in microwave assisted chemistry
US6888421B2 (en) * 2003-05-21 2005-05-03 Lucent Technologies Inc. Power attenuator with coupling port
US7432672B2 (en) * 2006-04-07 2008-10-07 Varian Medical Systems Technologies, Inc. Variable radiofrequency power source for an accelerator guide
US7786823B2 (en) 2006-06-26 2010-08-31 Varian Medical Systems, Inc. Power regulators
US8143816B2 (en) * 2008-08-13 2012-03-27 Varian Medical Systems Technologies, Inc. Power variator
CN112865830B (en) * 2021-01-19 2022-02-18 无锡国芯微电子系统有限公司 Numerical control amplitude-phase multifunctional chip

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3136950A (en) * 1961-10-02 1964-06-09 Space Technology Lab Inc Double sideband suppressed carrier balanced modulator using a ferrite circulator
US3202942A (en) * 1962-02-28 1965-08-24 Robert V Garver Microwave power amplitude limiter
FR1359881A (en) * 1963-03-21 1964-04-30 Comp Generale Electricite Frequency dependent transmission coefficient correction network for ultra-short waves
US3422378A (en) * 1965-10-19 1969-01-14 Hazeltine Research Inc Compensating means for minimizing undesirable variations in the amplitude of a reflected wave
US3432756A (en) * 1966-11-02 1969-03-11 Us Army Continuous microwave attenuator
US3493898A (en) * 1968-04-01 1970-02-03 Raytheon Co Wideband phase shifter
US3659233A (en) * 1970-07-07 1972-04-25 Collins Radio Co Microstrip rf variable attenuator
US3714592A (en) * 1971-12-06 1973-01-30 Varian Associates Network for pulling a microwave generator to the frequency of its resonant load

Also Published As

Publication number Publication date
FR2258014B3 (en) 1976-10-22
CA1015413A (en) 1977-08-09
FR2258014A1 (en) 1975-08-08
US3868602A (en) 1975-02-25
JPS5078250A (en) 1975-06-26
DE2443427A1 (en) 1975-03-27

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee