FR726531A - Improvements to high frequency electrical systems, such as very short wave signaling systems - Google Patents

Improvements to high frequency electrical systems, such as very short wave signaling systems

Info

Publication number
FR726531A
FR726531A FR726531DA FR726531A FR 726531 A FR726531 A FR 726531A FR 726531D A FR726531D A FR 726531DA FR 726531 A FR726531 A FR 726531A
Authority
FR
France
Prior art keywords
systems
high frequency
frequency electrical
short wave
wave signaling
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
Other languages
French (fr)
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR726531A publication Critical patent/FR726531A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/68—Tubes specially designed to act as oscillator with positive grid and retarding field, e.g. for Barkhausen-Kurz oscillators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
    • H01Q15/006—Selective devices having photonic band gap materials or materials of which the material properties are frequency dependent, e.g. perforated substrates, high-impedance surfaces

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Aerials With Secondary Devices (AREA)
FR726531D 1931-01-21 1931-01-21 Improvements to high frequency electrical systems, such as very short wave signaling systems Expired FR726531A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR726531T 1931-01-21

Publications (1)

Publication Number Publication Date
FR726531A true FR726531A (en) 1932-05-30

Family

ID=9110749

Family Applications (1)

Application Number Title Priority Date Filing Date
FR726531D Expired FR726531A (en) 1931-01-21 1931-01-21 Improvements to high frequency electrical systems, such as very short wave signaling systems

Country Status (2)

Country Link
US (1) US2043347A (en)
FR (1) FR726531A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE754559C (en) * 1934-04-14 1953-08-31 Julius Pintsch K G Arrangement for directional transmission or reception of ultra-high frequency electromagnetic oscillations
DE950652C (en) * 1941-03-22 1956-10-11 Telefunken Gmbh Directional spotlights

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419556A (en) * 1942-07-22 1947-04-29 Bell Telephone Labor Inc Scanning antenna
US2595271A (en) * 1943-12-20 1952-05-06 Kline Morris Antenna lobe shifting device
US2530098A (en) * 1945-05-03 1950-11-14 Lester C Van Atta Antenna
US2635191A (en) * 1945-07-09 1953-04-14 Jr Lewis E Swarts Antenna
BE470391A (en) * 1946-01-22
US2645769A (en) * 1947-06-05 1953-07-14 Walter Van B Roberts Continuous wave radar system
US2636125A (en) * 1948-04-10 1953-04-21 Bell Telephone Labor Inc Selective electromagnetic wave system
US2763860A (en) * 1949-12-03 1956-09-18 Csf Hertzian optics
US2813203A (en) * 1950-04-07 1957-11-12 Leeds & Northrup Co Optical systems for radiation pyrometers
US2762041A (en) * 1950-09-09 1956-09-04 Motorola Inc Signalling equipment
DE1269204B (en) * 1959-08-05 1968-05-30 Georg J E Goubau Method and device for the transmission of high frequency energy by means of an essentially cylindrical bundle of continuously free waves
US3189907A (en) * 1961-08-11 1965-06-15 Lylnan F Van Buskirk Zone plate radio transmission system
US3247508A (en) * 1963-10-04 1966-04-19 American Brake Shoe Co Microwave identification of railroad cars
US3631360A (en) * 1967-07-13 1971-12-28 Kurt Lehovec Electro-optical structures utilizing fresnel optical systems
US3704377A (en) * 1967-07-13 1972-11-28 Inventors & Investors Inc Laser comprising fresnel optics
US3649836A (en) * 1970-04-14 1972-03-14 Kurt Lehovec Electro-optical multiple image arrangements
US4744905A (en) * 1984-11-27 1988-05-17 Union Carbide Corporation Method for replacing PCB containing coolants in electrical induction apparatus with substantially PCB-free dielectric coolants
US4738780A (en) * 1984-11-27 1988-04-19 Union Carbide Corporation Method for replacing PCB-containing coolants in electrical induction apparatus with substantially PCB-free dielectric coolants
DE3536348A1 (en) * 1985-10-11 1987-04-16 Max Planck Gesellschaft Fresnel zone plate for focusing microwave radiation for a microwave antenna
FR2685131B1 (en) * 1991-12-11 1994-05-27 Telediffusion Fse FIXED REFLECTOR RECEIVING ANTENNA FOR MULTIPLE SATELLITE BEAMS.
SE510565C2 (en) * 1992-11-10 1999-06-07 Stig Anders Petersson Vågledarlins

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE754559C (en) * 1934-04-14 1953-08-31 Julius Pintsch K G Arrangement for directional transmission or reception of ultra-high frequency electromagnetic oscillations
DE950652C (en) * 1941-03-22 1956-10-11 Telefunken Gmbh Directional spotlights

Also Published As

Publication number Publication date
US2043347A (en) 1936-06-09

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