GB158927A - Improvements in aerial systems employed in wireless signalling - Google Patents
Improvements in aerial systems employed in wireless signallingInfo
- Publication number
- GB158927A GB158927A GB23510/19A GB2351019A GB158927A GB 158927 A GB158927 A GB 158927A GB 23510/19 A GB23510/19 A GB 23510/19A GB 2351019 A GB2351019 A GB 2351019A GB 158927 A GB158927 A GB 158927A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuits
- systems
- oscillations
- circuit
- combined
- 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
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
158,927. Franklin, C. S. Sept. 24, 1919. Directive signalling; duplex signalling.-Two or more unidirectional systems of the type described in Specifications 24098/14 and 5783/15 are spaced a fraction of a wave-length apart in the direction of signals to be received. Oscillations in these two systems are combined by phasing circuits with a common receiver. Each system is arranged to give a similar polar curve, and the resulting curve from combining the two systems is better than either taken separately, giving almost complete cancellation behind the station. In an example, Fig. 1, A, B, C, D are four frame aerials erected in the line of communication. A, B are combined through tuned circuits E, F coupled to them. The circuits E, F are mistuned equally but in opposite senses to a degree dependent on the spacing between the aerials, so that waves from one direction along A, D will produce oscillations in them of exactly opposite phase, and waves in the other direction, oscillations of slightly different phase. The circuits C, Dare similarly combined through G, H. The circuits E, F are both coupled to circuit O and the circuits G, H tQ the circuit P, and O, Pare both coupled to the receiving-circuit S. Each of the systems separately has a polar curve showing loops behind the station at 120‹ to the line of communication. In the present invention, circuits 0, P are mistuned equally but in opposite senses to a degree such that waves from this direction will produce in them oscillations of exactly opposite phase and will therefore produce no effect in circuit S. Thus the combined systems give zero reception at 90‹, 120‹ and 180‹ with the line of communication. A method is mentioned in which each of the four frame aerials mentioned above is replaced by two frames at right-angles connected to a radiogoniometer. This is stated to give zero reception in six controllable directions and to be particularly desirable in the case of duplex working.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL9010D NL9010C (en) | 1919-09-24 | ||
US1370735D US1370735A (en) | 1919-09-24 | Aerial system for wireless signaling | |
GB23510/19A GB158927A (en) | 1919-09-24 | 1919-09-24 | Improvements in aerial systems employed in wireless signalling |
FR524779A FR524779A (en) | 1919-09-24 | 1920-09-23 | Improvements in antenna systems used in wireless signaling |
DEM70804D DE383450C (en) | 1919-09-24 | 1920-09-24 | Arrangement for directional reception |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB23510/19A GB158927A (en) | 1919-09-24 | 1919-09-24 | Improvements in aerial systems employed in wireless signalling |
Publications (1)
Publication Number | Publication Date |
---|---|
GB158927A true GB158927A (en) | 1921-02-24 |
Family
ID=10196771
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB23510/19A Expired GB158927A (en) | 1919-09-24 | 1919-09-24 | Improvements in aerial systems employed in wireless signalling |
Country Status (5)
Country | Link |
---|---|
US (1) | US1370735A (en) |
DE (1) | DE383450C (en) |
FR (1) | FR524779A (en) |
GB (1) | GB158927A (en) |
NL (1) | NL9010C (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3267472A (en) * | 1960-07-20 | 1966-08-16 | Litton Systems Inc | Variable aperture antenna system |
FR2100994B1 (en) * | 1970-08-04 | 1976-04-16 | Int Standard Electric Corp |
-
0
- NL NL9010D patent/NL9010C/xx active
- US US1370735D patent/US1370735A/en not_active Expired - Lifetime
-
1919
- 1919-09-24 GB GB23510/19A patent/GB158927A/en not_active Expired
-
1920
- 1920-09-23 FR FR524779A patent/FR524779A/en not_active Expired
- 1920-09-24 DE DEM70804D patent/DE383450C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US1370735A (en) | 1921-03-08 |
DE383450C (en) | 1923-10-13 |
FR524779A (en) | 1921-09-10 |
NL9010C (en) |
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