GB651080A - Improvements in or relating to amplitude modulation of radio frequency waves - Google Patents

Improvements in or relating to amplitude modulation of radio frequency waves

Info

Publication number
GB651080A
GB651080A GB5999/48A GB599948A GB651080A GB 651080 A GB651080 A GB 651080A GB 5999/48 A GB5999/48 A GB 5999/48A GB 599948 A GB599948 A GB 599948A GB 651080 A GB651080 A GB 651080A
Authority
GB
United Kingdom
Prior art keywords
wave
disc
relating
radio frequency
amplitude modulation
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
GB5999/48A
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.)
US Department of Commerce
Original Assignee
US Department of Commerce
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 US Department of Commerce filed Critical US Department of Commerce
Publication of GB651080A publication Critical patent/GB651080A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Aerials With Secondary Devices (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

651,080. Wave-guides. DEPARTMENT OF COMMERCE, DIRECTOR OF THE OFFICE OF TECHNICAL SERVICES OF. Feb. 27, 1948, No. 5999. Convention date, Oct. 10, 1944. [Class 40 (viii)] [Also in Group XL (c)] Energy traversing a wave-guide 1 is amplitude-modulated by the insertion through a longitudinal slot 4 of a dielectric disc 5, a part 7 of the surface of which is coated with resistive material. The disc may be mounted on a shaft 6 driven by a motor 8 so that the wave amplitude is given a cyclic attenuation. The resistive coating may occupy various area on the surface of the disc in accordance with a plan or code.
GB5999/48A 1944-10-10 1948-02-27 Improvements in or relating to amplitude modulation of radio frequency waves Expired GB651080A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US558027A US2505557A (en) 1944-10-10 1944-10-10 Wave guide attenuator for amplitude modulation of radio waves

Publications (1)

Publication Number Publication Date
GB651080A true GB651080A (en) 1951-03-14

Family

ID=24227873

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5999/48A Expired GB651080A (en) 1944-10-10 1948-02-27 Improvements in or relating to amplitude modulation of radio frequency waves

Country Status (2)

Country Link
US (1) US2505557A (en)
GB (1) GB651080A (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735982A (en) * 1956-02-21 Radio frequency power comparator
US2705780A (en) * 1946-11-02 1955-04-05 Polytechnie Inst Matched resistance film type wave guide attenuators
US2898562A (en) * 1946-11-26 1959-08-04 Jr John B Trevor Switching device for high frequency electrical energy
US2708262A (en) * 1948-03-06 1955-05-10 Itt Micro-wave modulator
US2660713A (en) * 1948-05-15 1953-11-24 Westinghouse Electric Corp Wave guide attenuator
US2683855A (en) * 1949-11-30 1954-07-13 Raytheon Mfg Co Frequency converter
US2779003A (en) * 1950-09-25 1957-01-22 Philip J Allen Dielectric disc phase-shifter for waveguide
US2705779A (en) * 1952-03-18 1955-04-05 Polytechnic Inst Attenuator units for waveguides
US2989708A (en) * 1952-06-26 1961-06-20 Wilbur A Joerndt Combined modulator-attenuator
US2729792A (en) * 1953-02-12 1956-01-03 Aircraft Armaments Inc Modulators
US2903658A (en) * 1955-01-03 1959-09-08 Fairey Aviat Co Ltd Apparatus for modulating high frequency waves
US3009122A (en) * 1955-07-08 1961-11-14 Gallay Harris Conical scan attenuator
US2892157A (en) * 1955-10-21 1959-06-23 Itt Modulators
US2868939A (en) * 1956-01-16 1959-01-13 Chemetron Corp Suppression of radiation from dielectric heating applicators
US3030572A (en) * 1957-05-15 1962-04-17 Varian Associates Signal generator
US3079551A (en) * 1958-01-23 1963-02-26 Beloit Iron Works Apparatus and method for measurement of moisture content
US3080540A (en) * 1960-10-05 1963-03-05 Narda Microwave Corp Wave guide attenuator using shaped absorber of iron powder loaded resin to equalize shunt and series losses
US3218583A (en) * 1963-08-30 1965-11-16 Textron Inc High frequency attenuator with constant phase shift

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2197123A (en) * 1937-06-18 1940-04-16 Bell Telephone Labor Inc Guided wave transmission
NL63520C (en) * 1941-12-10
US2414785A (en) * 1942-01-29 1947-01-21 Sperry Gyroscope Co Inc High-frequency tube structure
US2423396A (en) * 1943-05-01 1947-07-01 Rca Corp Wave guide attenuator

Also Published As

Publication number Publication date
US2505557A (en) 1950-04-25

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