DE880325C - Directional antenna for communications equipment consisting of several dipoles - Google Patents
Directional antenna for communications equipment consisting of several dipolesInfo
- Publication number
- DE880325C DE880325C DES10677D DES0010677D DE880325C DE 880325 C DE880325 C DE 880325C DE S10677 D DES10677 D DE S10677D DE S0010677 D DES0010677 D DE S0010677D DE 880325 C DE880325 C DE 880325C
- Authority
- DE
- Germany
- Prior art keywords
- dipoles
- directional antenna
- communications equipment
- equipment consisting
- several
- 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
- 230000005855 radiation Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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
- H01Q21/12—Parallel arrangements of substantially straight elongated conductive units
-
- 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
- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Description
Es ist bei -Richtstrahlantennen, .die aus mehreren Einzeldipolen bestehen, bekannt, die Konstanz des Eingangswiderstandes in.einem breiteren Frequenzband dadurch zu erreichen, daß man die Eingangswiderstände sämtlicher Einzeldipole ;einander gleichmacht und sie mit Leitungen gleicher Phasenlänge derart zusammenschaltet; daß an keiner Stelle Stoßstellen - des Wellenwiderstandes auftreten. ;Man pflegt zu diesem Zweck die einzelnen Dipole unter sich :gleichzumachen, dann sind jedoch ihre Eingangswiderstände nicht genau gleich wegen der gegenseitigen Beeinflussung der Dipole.Directional antennae that consist of several single dipoles known, the constancy of the input resistance in a broader frequency band as a result to achieve that the input resistances of all single dipoles; each other equalizes and interconnects them with lines of the same phase length in this way; that no joints - of the wave resistance occur. ; One cultivates for this purpose the individual dipoles among themselves: to equalize, then however their input resistances are not exactly the same because of the mutual influence of the dipoles.
Die Erfindung zeigt nun einen !Weg, auf dem es möglich ist, den unerwünschten gegenseitigen Einfluß der Dipole unschädlich zu machen. Gemäß der Erfindung sind bei einer aus mehreren Dipolen bestehenden Richtstrahlantenne für Nachrichtengeräte zur Erzielung eines gleichen Eingangswiderstandes für alle Einzeldipole deren Dickenabmessungen verschieden gewählt. Die Einzeldipole sind also entweder verschieden dick oder bei scheibenförmiger Ausbildung mehr oder weniger breit.The invention now shows a way in which it is possible to avoid the undesired to render the mutual influence of the dipoles harmless. According to the invention are in the case of a directional antenna for communications equipment consisting of several dipoles to achieve the same input resistance for all single dipoles their thickness dimensions differently chosen. The individual dipoles are either of different thicknesses or at disc-shaped training more or less wide.
In der Zeichnung ist als Ausführungsbeispiel eine Richtstrahlantenne dargestellt, wie sie vorzugsweise in der Dezimeterwellentechnik benutzt wird. Die Einzeldipole.i bis 4 sind scheibenförmig ausgebildet, und zwar sind die außenliegenden Dipole i und .4 gegenüber den innenliegenden Dipolen -2 und 3 breiter ausgebildet. Hierdurch wird die Verschiedenheit des Eingangswiderstandes der Dipole, die nur einen unmittelbaren Nachbarn und der Eingangswiderstand derjenigen Dipole, die zwei unmittelbare Nachbarn haben, ausgeglichen. Außerdem kann durch Anwendung der Erfindung, also durch Änderung der Dickenabmessungen der Randdipole, auch die Verkleinerung der Reflektorfläche R1 ausgeglichen werden. Theoretisch hat man bekanntlich zur Erzielung einer vollkommenen Reflektorwirkung eine unendlich ausgedehnte Fläche nötig, praktisch begnügt man sich aber mit gutem Erfolg mit einer die Dipole allseitig um A/4. überragenden Fläche R2, wobei A die Betriebswellenlänge ist. In solchen Fällen aber, wo es auf. die Unterdrückung der rückwärtigen Strahlung nicht allzu sehr ankommt, wohl aber unter Erhaltung des Breitbandcharakters auf die Verkleinerung der gesamten Antennenfläche, wird man die Reflektorfläche bis auf die von den Dipolen eingenommene Fläche verkleinern. Dann ändern sich aber die Eingangswiderstände der Randdipole i und d. infolge der nur halben Reflektorfläche, ein Nachteil, der gleichfalls durch die Maßnahmen beseitigt werden kann, die die Erfindung vorschlägtIn the drawing, a directional antenna is shown as an exemplary embodiment shown as it is preferably used in decimeter wave technology. the Individeldipole.i to 4 are disc-shaped, namely the outer ones Dipoles i and .4 are wider than the inner dipoles -2 and 3. This reduces the difference in the input resistance of the dipoles, which only an immediate neighbor and the input resistance of those dipoles, the two immediate neighbors have balanced. In addition, by applying the invention, thus by changing the thickness dimensions of the edge dipoles, also the reduction the reflector surface R1 are compensated. Theoretically, as is well known, one has to Achieving a perfect reflector effect an infinitely extensive area necessary, but in practice one is satisfied with good success with one dipole on all sides at A / 4. towering area R2, where A is the operating wavelength. In such Cases, however, where it is on. the suppression of the back radiation not too much is very important, but while preserving the broadband character of the reduction of the entire antenna surface, one becomes the reflector surface except for that of the dipoles Reduce the occupied area. But then the input resistances of the change Edge dipoles i and d. due to only half the reflector surface, a disadvantage, too can be eliminated by the measures proposed by the invention
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES10677D DE880325C (en) | 1942-10-15 | 1942-10-15 | Directional antenna for communications equipment consisting of several dipoles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES10677D DE880325C (en) | 1942-10-15 | 1942-10-15 | Directional antenna for communications equipment consisting of several dipoles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE880325C true DE880325C (en) | 1953-06-22 |
Family
ID=7473402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DES10677D Expired DE880325C (en) | 1942-10-15 | 1942-10-15 | Directional antenna for communications equipment consisting of several dipoles |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE880325C (en) |
-
1942
- 1942-10-15 DE DES10677D patent/DE880325C/en not_active Expired
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