BE497725A - - Google Patents
Info
- Publication number
- BE497725A BE497725A BE497725DA BE497725A BE 497725 A BE497725 A BE 497725A BE 497725D A BE497725D A BE 497725DA BE 497725 A BE497725 A BE 497725A
- Authority
- BE
- Belgium
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
- 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
-
- 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
- G01S1/72—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 ultrasonic, sonic or infrasonic waves
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US682723XA | 1949-08-24 | 1949-08-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE497725A true BE497725A (es) |
Family
ID=22081515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE497725D BE497725A (es) | 1949-08-24 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE497725A (es) |
| FR (1) | FR1025043A (es) |
| GB (1) | GB682723A (es) |
-
0
- BE BE497725D patent/BE497725A/xx unknown
-
1950
- 1950-08-08 GB GB19732/50A patent/GB682723A/en not_active Expired
- 1950-08-23 FR FR1025043D patent/FR1025043A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1025043A (fr) | 1953-04-09 |
| GB682723A (en) | 1952-11-12 |