GB604772A - Improvements relating to devices for determining the direction of a transmitter of electromagnetic waves or of an object reflecting such waves - Google Patents

Improvements relating to devices for determining the direction of a transmitter of electromagnetic waves or of an object reflecting such waves

Info

Publication number
GB604772A
GB604772A GB22974/45A GB2297445A GB604772A GB 604772 A GB604772 A GB 604772A GB 22974/45 A GB22974/45 A GB 22974/45A GB 2297445 A GB2297445 A GB 2297445A GB 604772 A GB604772 A GB 604772A
Authority
GB
United Kingdom
Prior art keywords
path
horns
waves
aerial
waveguide
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
GB22974/45A
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
CSF Compagnie Generale de Telegraphie sans Fil SA
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 CSF Compagnie Generale de Telegraphie sans Fil SA filed Critical CSF Compagnie Generale de Telegraphie sans Fil SA
Publication of GB604772A publication Critical patent/GB604772A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/02—Antennas or antenna systems providing at least two radiating patterns providing sum and difference patterns
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns

Abstract

604,772. Radio direction-finding. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. Sept. 6, 1945, No. 22974. Convention date, July 7, 1944. [Class 40 (vii)] Relates to " two-path '' D.F. systems in which the directivity characteristic I of a first aerial system connected to one path has a minimum coincident with a maximum of the directivity characteristic II of the second aerial system connected to the other path, means being provided for comparing the outputs from the two paths to provide a D.F. indication. According to the invention, the first aerial system comprises two adjacent electromagnetic horns connected by branch waveguides differing in length by #/2 to a first waveguide, Fig. 3 (not shown), and the second aerial comprises a symmetrically positioned third horn connected to a second waveguide. The first and second waveguides are connected to separate receivers the outputs from which are applied to the X and Y plates of a cathoderay tube to produce a linear trace the inclination of which with respect to the vertical indicates the required bearing. When used in a pulse radar system, a fourth transmitting horn may be provided, the apertures of the four horns being in a common plane, Fig. 2 (not shown), or alternatively one of the three receiving horns may be employed also for transmission by using a T.R. switch.
GB22974/45A 1944-07-07 1945-09-06 Improvements relating to devices for determining the direction of a transmitter of electromagnetic waves or of an object reflecting such waves Expired GB604772A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR840404X 1944-07-07

Publications (1)

Publication Number Publication Date
GB604772A true GB604772A (en) 1948-07-09

Family

ID=9302086

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22974/45A Expired GB604772A (en) 1944-07-07 1945-09-06 Improvements relating to devices for determining the direction of a transmitter of electromagnetic waves or of an object reflecting such waves

Country Status (5)

Country Link
CH (1) CH251913A (en)
DE (1) DE840404C (en)
ES (1) ES172692A1 (en)
FR (1) FR992574A (en)
GB (1) GB604772A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2845622A (en) * 1953-11-13 1958-07-29 Sperry Rand Corp Direction sensitive radio system
DE1227088B (en) * 1957-12-17 1966-10-20 Telefunken Patent Directional antenna arrangement for minimum bearing

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2920322A (en) * 1956-08-28 1960-01-05 Jr Burton P Brown Antenna system
DE1108283B (en) * 1957-09-20 1961-06-08 Emi Ltd Radar device with spatial sum-difference bearing
DE4007453A1 (en) * 1990-03-09 1991-09-12 Telefunken Electronic Gmbh DEVICE FOR MONITORING OBJECTS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2845622A (en) * 1953-11-13 1958-07-29 Sperry Rand Corp Direction sensitive radio system
DE1227088B (en) * 1957-12-17 1966-10-20 Telefunken Patent Directional antenna arrangement for minimum bearing

Also Published As

Publication number Publication date
FR992574A (en) 1951-10-19
DE840404C (en) 1952-06-03
CH251913A (en) 1947-11-30
ES172692A1 (en) 1946-04-01

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