GB166780A - Improvements in wireless directional systems - Google Patents
Improvements in wireless directional systemsInfo
- Publication number
- GB166780A GB166780A GB1404320A GB1404320A GB166780A GB 166780 A GB166780 A GB 166780A GB 1404320 A GB1404320 A GB 1404320A GB 1404320 A GB1404320 A GB 1404320A GB 166780 A GB166780 A GB 166780A
- Authority
- GB
- United Kingdom
- Prior art keywords
- error
- correcting
- coil
- quadrantal
- effect
- 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
- 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)
- Magnetic Resonance Imaging Apparatus (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
166,780. Robinson, J., and Smith, R. T. May 21, 1920. Directive signalling.-In directional receiving- sets, as used on aeroplanes &c., the variable error due to re-radiation from the metallic structure of the craft is subdued or eliminated bv means of a correcting-coil, which is arranged so that its effect is adjustable and which is placed either in series or in parallel with, or is coupled to, the directional coil or coils. The usual error is quadrantal, as shown in Fig. 1, or semicircular as in Fig. 2. Figs. 7 and 8 show an arrangement for correcting quadrantal error. The correcting-coil 13 is geared bv a crossed drive 16 so as to rotate at the same rate but in the opposite direction to the main and auxiliary directional aerials 11, 12. As shown in Fig. 8, it is in series with the auxiliary coil 12, its effect thereon being controlled by an adjustable shunt or inductance 18. The correcting effect will be zero in the fore-and-aft directions, and at right-angles thereto; whilst it will be a maximum at intermediate points, i.e. at 45‹, as required by the quadrantal-error graph, Fig. 1. For the type of error indicated in Fig. 2, the correcting-coil is fixed, and set in the plane of maximum error, so as to apply a maximum correction in the positions corresponding to an angular displacement of 90‹ and 270‹ respectively.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1404320A GB166780A (en) | 1920-05-21 | 1920-05-21 | Improvements in wireless directional systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1404320A GB166780A (en) | 1920-05-21 | 1920-05-21 | Improvements in wireless directional systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB166780A true GB166780A (en) | 1921-07-28 |
Family
ID=10033952
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1404320A Expired GB166780A (en) | 1920-05-21 | 1920-05-21 | Improvements in wireless directional systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB166780A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2485675A (en) * | 1945-08-01 | 1949-10-25 | Standard Telephones Cables Ltd | Compensating system |
-
1920
- 1920-05-21 GB GB1404320A patent/GB166780A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2485675A (en) * | 1945-08-01 | 1949-10-25 | Standard Telephones Cables Ltd | Compensating system |
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