GB632355A - Improvements in and relating to loop antenna systems - Google Patents
Improvements in and relating to loop antenna systemsInfo
- Publication number
- GB632355A GB632355A GB792244A GB792244A GB632355A GB 632355 A GB632355 A GB 632355A GB 792244 A GB792244 A GB 792244A GB 792244 A GB792244 A GB 792244A GB 632355 A GB632355 A GB 632355A
- Authority
- GB
- United Kingdom
- Prior art keywords
- windings
- core
- coils
- wound
- degrees
- 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
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
Landscapes
- Transformers For Measuring Instruments (AREA)
- Coils Or Transformers For Communication (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
632,355. Aerials. POLYDOROFF, W. J. April 27, 1944, No. 7922. [Class 40 (vii)] A loop aerial for direc, tion-finding comprises a pair of coils wound on an elongated ferromagnetic core and so connected that the effects of dis. placement currents are neutralized. Preferably the cores are of finely. divided magnetic ma. terial as described in Specification 522,492, and have a wide pitch so that, for a given value of the inductance, many turns spread over a long core may be used for the purpose of increasing the effective height. In order that the windings 11, 12, Fig. 1, may be close to the hollow core 13 they are located in spiral grooves in the insulating sheath 15 which encloses the core. The windings 11, 12 have their terminals at the middle and are connected at their outer ends, so that the effects of displacement current, enhanced by the length of the coils, cancel one another. In a modification, Fig. 2 (not shown), two coils may be wound in opposite senses and connected in parallel at the middle of the aerial. The two windings may have separate cores with a central gap between them, Fig. 3 (not shown), and they may be wound obliquely, Fig. 4, the angle between them lying between 15 degrees and 25 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB792244A GB632355A (en) | 1944-04-27 | 1944-04-27 | Improvements in and relating to loop antenna systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB792244A GB632355A (en) | 1944-04-27 | 1944-04-27 | Improvements in and relating to loop antenna systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB632355A true GB632355A (en) | 1949-11-28 |
Family
ID=9842361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB792244A Expired GB632355A (en) | 1944-04-27 | 1944-04-27 | Improvements in and relating to loop antenna systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB632355A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4335658A1 (en) * | 1993-10-13 | 1995-04-20 | Koepenick Funkwerk Gmbh | Circuit arrangement for radio ripple control receivers in the long-wave frequency range |
-
1944
- 1944-04-27 GB GB792244A patent/GB632355A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4335658A1 (en) * | 1993-10-13 | 1995-04-20 | Koepenick Funkwerk Gmbh | Circuit arrangement for radio ripple control receivers in the long-wave frequency range |
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