GB531274A - Improvements in systems for modulation of radio frequency currents with carrier suppression - Google Patents

Improvements in systems for modulation of radio frequency currents with carrier suppression

Info

Publication number
GB531274A
GB531274A GB20626/39A GB2062639A GB531274A GB 531274 A GB531274 A GB 531274A GB 20626/39 A GB20626/39 A GB 20626/39A GB 2062639 A GB2062639 A GB 2062639A GB 531274 A GB531274 A GB 531274A
Authority
GB
United Kingdom
Prior art keywords
points
radio frequency
systems
modulation
frequency currents
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
GB20626/39A
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.)
INTERCONTINENTAL SERVICE CORP
Original Assignee
INTERCONTINENTAL SERVICE CORP
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 INTERCONTINENTAL SERVICE CORP filed Critical INTERCONTINENTAL SERVICE CORP
Publication of GB531274A publication Critical patent/GB531274A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Motorcycle And Bicycle Frame (AREA)
  • Amplitude Modulation (AREA)

Abstract

531,274. Modulating systems. INTERCONTINENTAL-SERVICE CORPORATION July 15, 1939, No. 20626. Convention date, July 18, 1938. [Class 40 (v)] Energy from a radio frequency source 20 is modulated at a frequency determined by the rotation of a variable condenser element 26 and the side-bands, the carrier being suppressed, are applied to a load c, d. -The element 26 in association with elements 27 and a circuit element 33 varies the impedance of the transmission lines 23, 24 at points B cyclically between zero and infinity. The points B are an odd number of quarter wave lengths from the source 20. Similar variation of impedance occurs at points C of the lines 22, 25 but out of phase with the variation at points B.
GB20626/39A 1938-07-18 1939-07-15 Improvements in systems for modulation of radio frequency currents with carrier suppression Expired GB531274A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US219861A US2232592A (en) 1938-07-18 1938-07-18 Modulation system

Publications (1)

Publication Number Publication Date
GB531274A true GB531274A (en) 1941-01-01

Family

ID=22821064

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20626/39A Expired GB531274A (en) 1938-07-18 1939-07-15 Improvements in systems for modulation of radio frequency currents with carrier suppression

Country Status (4)

Country Link
US (1) US2232592A (en)
CH (1) CH230731A (en)
FR (1) FR857948A (en)
GB (1) GB531274A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2492138A (en) * 1940-02-23 1949-12-27 Int Standard Electric Corp Mechanical modulator for radio beacons utilizing two tones
US2416790A (en) * 1941-01-28 1947-03-04 Sperry Gyroscope Co Inc Transmission line bridge circuit
US2444081A (en) * 1941-08-11 1948-06-29 Standard Telephones Cables Ltd Switching device for highfrequency circuits
US2488419A (en) * 1943-06-30 1949-11-15 Rca Corp Antenna and lobe switcher
FR954971A (en) * 1943-11-06 1950-01-06
US2514957A (en) * 1944-06-27 1950-07-11 Hazeltine Research Inc High-frequency tuning device
FR993880A (en) * 1944-10-27 1951-11-08 Sadir Carpentier Direction finding method and installation
US3673516A (en) * 1971-02-08 1972-06-27 Itt Continuous phase shifter/resolver employing a rotary halfwave plate

Also Published As

Publication number Publication date
US2232592A (en) 1941-02-18
FR857948A (en) 1940-10-05
CH230731A (en) 1944-01-31

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