GB242236A - Method and arrangement for directional transmission and reception by means of electric waves - Google Patents
Method and arrangement for directional transmission and reception by means of electric wavesInfo
- Publication number
- GB242236A GB242236A GB20794/25A GB2079425A GB242236A GB 242236 A GB242236 A GB 242236A GB 20794/25 A GB20794/25 A GB 20794/25A GB 2079425 A GB2079425 A GB 2079425A GB 242236 A GB242236 A GB 242236A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reflecting
- primary
- rows
- aerials
- antennae
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
Landscapes
- Radar Systems Or Details Thereof (AREA)
Abstract
242,236. Hahnemann, W. Oct. 29, 1924, [Convention date]. Addition to 237,906. Directive signalling.-To the directional aerial arrangement described in the parent Specification is added a reflecting system comprising a series of individual conductors arranged in rows parallel to the primary aerials, and in layers extending to a depth of not less than half a wavelength. As shown in plan in Fig. 4 the primary aerials 1 - - 5 are backed by five rows of reflecting units 6 - - 10, in staggered relation, the whole being carried by four masts 11 - - 14. Each reflecting unit is spaced apart 'from its neighbours, and is separately earthed. As shown in Fig. 5 the units are separately tuned by means of coils 15. The system may act partly as a reflector to re-inforce the desired directional beam, and partly as an absorber to prevent the backward spread of energy in an undesired direction. Fig. 6 shows two rows of primary antennae A, B separated by a common reflecting system C. Or a single row of antennae may be screened by two reflecting systems arranged back and front, one or other of the reflectors being tuned or detuned, i.e. made transparent or opaque at will. For short-wave working the system may be mounted so as to be capable of bodily rotation.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE242236X | 1924-10-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB242236A true GB242236A (en) | 1927-02-21 |
Family
ID=5915025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20794/25A Expired GB242236A (en) | 1924-10-29 | 1925-08-19 | Method and arrangement for directional transmission and reception by means of electric waves |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB242236A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6252137B1 (en) | 1997-11-12 | 2001-06-26 | E. I. Du Pont De Nemours And Company | Soybean homolog of seed-specific transcription activator from Phaseolus vulgaris |
-
1925
- 1925-08-19 GB GB20794/25A patent/GB242236A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6252137B1 (en) | 1997-11-12 | 2001-06-26 | E. I. Du Pont De Nemours And Company | Soybean homolog of seed-specific transcription activator from Phaseolus vulgaris |
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