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 wavesInfo
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Radar Systems Or Details Thereof (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
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.
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)
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)
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 |
-
1944
- 1944-07-07 FR FR992574D patent/FR992574A/en not_active Expired
-
1945
- 1945-08-02 CH CH251913D patent/CH251913A/en unknown
- 1945-09-06 GB GB22974/45A patent/GB604772A/en not_active Expired
-
1946
- 1946-02-26 ES ES172692A patent/ES172692A1/en not_active Expired
-
1950
- 1950-10-01 DE DEC2966A patent/DE840404C/en not_active Expired
Cited By (2)
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 |
---|---|
CH251913A (en) | 1947-11-30 |
FR992574A (en) | 1951-10-19 |
DE840404C (en) | 1952-06-03 |
ES172692A1 (en) | 1946-04-01 |
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