GB553424A - Improvements in apparatus for the production of wireless course beams - Google Patents
Improvements in apparatus for the production of wireless course beamsInfo
- Publication number
- GB553424A GB553424A GB457342A GB457342A GB553424A GB 553424 A GB553424 A GB 553424A GB 457342 A GB457342 A GB 457342A GB 457342 A GB457342 A GB 457342A GB 553424 A GB553424 A GB 553424A
- Authority
- GB
- United Kingdom
- Prior art keywords
- degrees
- angle
- focus
- producing
- ground level
- Prior art date
- 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
Abstract
553,424. Directive wireless signalling. DOWSETT, H. M. April 7, 1942, No. 4573. [Class 40 (v)] For producing a beam over a restricted horizontal angle, apparatus mainly below ground level comprises a vertical dipole A, O, B, Fig. 1, the centre being at one focus of an elliptical reflector c, a, b, the conjugate focus P being at or near ground level. A semi-spherical reflector d, e, f, also having its focus at o, has such a radius that waves falling on it are reflected back through o in phase with those falling on the elliptical mirror. As shown the waves diverge over a vertical angle g, P, k and a horizontal angle of 180 degrees. For producing an equi-signal overlapping beam, two such arrangements close together may be differently modulated and so designed that the beams overlap by, say, 5 degrees as indicated in Fig. 3, the overlap being shown shaded. With this arrangement, there is no sense ambiguity as there is no radiation within the angle 180 degrees - 185 degrees. Three such devices may be arranged to define three courses at an angle of 120 degrees, Fig. 4 (not shown).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB457342A GB553424A (en) | 1942-04-07 | 1942-04-07 | Improvements in apparatus for the production of wireless course beams |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB457342A GB553424A (en) | 1942-04-07 | 1942-04-07 | Improvements in apparatus for the production of wireless course beams |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB553424A true GB553424A (en) | 1943-05-20 |
Family
ID=9779694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB457342A Expired GB553424A (en) | 1942-04-07 | 1942-04-07 | Improvements in apparatus for the production of wireless course beams |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB553424A (en) |
-
1942
- 1942-04-07 GB GB457342A patent/GB553424A/en not_active Expired
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