BE438561A - - Google Patents
Info
- Publication number
- BE438561A BE438561A BE438561DA BE438561A BE 438561 A BE438561 A BE 438561A BE 438561D A BE438561D A BE 438561DA BE 438561 A BE438561 A BE 438561A
- 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
- 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
- G01S3/085—Means for reducing polarisation errors, e.g. by use of Adcock or spaced loop antenna systems by using spaced loop aerial 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)
- Details Of Aerials (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL538458X | 1939-04-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE438561A true BE438561A (it) |
Family
ID=19787235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE438561D BE438561A (it) | 1939-04-04 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE438561A (it) |
| FR (1) | FR864610A (it) |
| GB (1) | GB538458A (it) |
| NL (1) | NL57014C (it) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2602138A (en) * | 1948-11-06 | 1952-07-01 | Canady Don | Antenna |
-
0
- BE BE438561D patent/BE438561A/xx unknown
- NL NL57014D patent/NL57014C/xx active
-
1940
- 1940-04-01 GB GB5871/40A patent/GB538458A/en not_active Expired
- 1940-04-02 FR FR864610D patent/FR864610A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL57014C (it) | |
| FR864610A (fr) | 1941-05-01 |
| GB538458A (en) | 1941-08-05 |