FR958705A - - Google Patents
Info
- Publication number
- FR958705A FR958705A FR958705DA FR958705A FR 958705 A FR958705 A FR 958705A FR 958705D A FR958705D A FR 958705DA FR 958705 A FR958705 A FR 958705A
- Authority
- FR
- France
- 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
-
- 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
- G01S1/08—Systems for determining direction or position line
- G01S1/20—Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems
- G01S1/24—Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems the synchronised signals being pulses or equivalent modulations on carrier waves and the transit times being compared by measuring the difference in arrival time of a significant part of the modulations, e.g. LORAN systems
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
- G01S7/034—Duplexers
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)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Geophysics And Detection Of Objects (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB329641A GB585826A (en) | 1941-03-11 | 1941-03-11 | Improvements in or relating to the detection of obstacles by means of electromagnetic impulses |
Publications (1)
Publication Number | Publication Date |
---|---|
FR958705A true FR958705A (fr) | 1950-03-17 |
Family
ID=9755620
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR958705D Expired FR958705A (fr) | 1941-03-11 |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE476541A (fr) |
ES (1) | ES177226A1 (fr) |
FR (1) | FR958705A (fr) |
GB (1) | GB585826A (fr) |
-
0
- BE BE476541D patent/BE476541A/xx unknown
- FR FR958705D patent/FR958705A/fr not_active Expired
-
1941
- 1941-03-11 GB GB329641A patent/GB585826A/en not_active Expired
-
1947
- 1947-03-13 ES ES0177226A patent/ES177226A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB585826A (en) | 1947-02-26 |
BE476541A (fr) | |
ES177226A1 (es) | 1947-04-16 |