NL21421C - - Google Patents
Info
- Publication number
- NL21421C NL21421C NL21421DA NL21421C NL 21421 C NL21421 C NL 21421C NL 21421D A NL21421D A NL 21421DA NL 21421 C NL21421 C NL 21421C
- 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
- G01S3/06—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
- G01S3/065—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 by using non-directional aerial
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL287491X | 1927-03-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL21421C true NL21421C (https=) |
Family
ID=19782595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL21421D NL21421C (https=) | 1927-03-21 |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE491604C (https=) |
| GB (1) | GB287491A (https=) |
| NL (1) | NL21421C (https=) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2285712B (en) * | 1994-01-17 | 1998-02-11 | Benjamin Edginton | Improvements relating to a magnetic loop antenna |
-
0
- NL NL21421D patent/NL21421C/xx active
-
1928
- 1928-03-16 DE DEN28587D patent/DE491604C/de not_active Expired
- 1928-03-21 GB GB8598/28A patent/GB287491A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE491604C (de) | 1930-02-15 |
| GB287491A (en) | 1928-09-27 |