NL54848C - - Google Patents
Info
- Publication number
- NL54848C NL54848C NL54848DA NL54848C NL 54848 C NL54848 C NL 54848C NL 54848D A NL54848D A NL 54848DA NL 54848 C NL54848 C NL 54848C
- Authority
- NL
- Netherlands
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
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/04—Details
- G01S3/08—Means for reducing polarisation errors, e.g. by use of Adcock or spaced loop antenna 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
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/04—Details
- G01S3/06—Means for increasing effective directivity, e.g. by combining signals having differently oriented directivity characteristics or by sharpening the envelope waveform of the signal derived from a rotating or oscillating beam antenna
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Support Of Aerials (AREA)
- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE512705X | 1937-12-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL54848C true NL54848C (xx) |
Family
ID=6548207
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL54848D NL54848C (xx) | 1937-12-20 | ||
| NL91154D NL91154B (xx) | 1937-12-20 |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL91154D NL91154B (xx) | 1937-12-20 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2248762A (xx) |
| FR (1) | FR847721A (xx) |
| GB (1) | GB512705A (xx) |
| NL (2) | NL91154B (xx) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2422026A (en) * | 1943-07-28 | 1947-06-10 | Rca Corp | Radio direction finding |
| US2922158A (en) * | 1956-05-14 | 1960-01-19 | Boeing Co | Radar corner reflector with electrically conductive liquid reflective surface |
-
0
- NL NL54848D patent/NL54848C/xx active
- NL NL91154D patent/NL91154B/xx unknown
-
1938
- 1938-12-17 US US246306A patent/US2248762A/en not_active Expired - Lifetime
- 1938-12-19 FR FR847721D patent/FR847721A/fr not_active Expired
- 1938-12-20 GB GB37034/38A patent/GB512705A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR847721A (fr) | 1939-10-16 |
| NL91154B (xx) | |
| US2248762A (en) | 1941-07-08 |
| GB512705A (en) | 1939-09-22 |