DE861719C - Ultra-short wave arrangement with concave mirror - Google Patents
Ultra-short wave arrangement with concave mirrorInfo
- Publication number
- DE861719C DE861719C DET2348D DET0002348D DE861719C DE 861719 C DE861719 C DE 861719C DE T2348 D DET2348 D DE T2348D DE T0002348 D DET0002348 D DE T0002348D DE 861719 C DE861719 C DE 861719C
- Authority
- DE
- Germany
- Prior art keywords
- concave mirror
- ultra
- short wave
- mirror
- wave arrangement
- 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
- H01Q19/12—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 wherein the surfaces are concave
- H01Q19/13—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 wherein the surfaces are concave the primary radiating source being a single radiating element, e.g. a dipole, a slot, a waveguide termination
- H01Q19/132—Horn reflector antennas; Off-set feeding
Landscapes
- Aerials With Secondary Devices (AREA)
Description
Bei -sehr k11TZen Welle ist es: oft zWeckmäßig,-Teile des Senders oder den ganzen Sender unmittelbar in den Brennpunkt des Hohlreflektors bzw. in dessen unmittelbare Nähe zu setzen, um lange Zuleitungenzu vermeiden, Hierdurch wird jedoch das Feld irr der Reflektoröffnung und damit _ das Strahlungsfeld diagramm stark verzerrt. Diese Nachteile werden gemäß der vorliegenden Erfindung dadurch vermieden, daß als Hohlspiegel lediglich die eine, in bezug auf die Achse symmetrisch liegende' Hälfte dient, -während die andere Hälfte fortgelassen oder abgedeckt ist, und daß die Sendeanordnung oder Teile 'der Sendeanordnung in unmittelbarer Nähe des Brennpunktes vor der fortgelassenen bzw. abgedeckten Hälfte angeordnet sind, derart, daß die Strahlung im wesentlichen ungehindert aus der Öffnung der wirksamen Hälfte des Parabolspiegels austreten kann.With -very k11TZen wave it is: often purposeful, -part of the transmitter or the whole transmitter directly in the focal point of the hollow reflector or in to put it in the immediate vicinity in order to avoid long leads However, the field irr the reflector opening and thus _ the radiation field diagram heavily distorted. These disadvantages are thereby addressed in accordance with the present invention avoided that as a concave mirror only one, symmetrical with respect to the axis lying 'half serves, while the other half is left out or covered, and that the transmission arrangement or parts of the transmission arrangement in the immediate vicinity of the focal point are arranged in front of the omitted or covered half, such that the radiation is essentially unhindered from the opening of the effective Half of the parabolic mirror can emerge.
Es ist zwar schon ein Spiegel zur horizontalen Rundstrahlung in Form einer angenähert kegelförmigen Fläche bekannt, bei welchem die Erzeugende durch einen nicht an den Scheitel der Parabel angrenzenden Teile einer Parabelkurve dargestellt wird. - Diese bekannte Anordnung legt jedoch nicht nahe, einen z. B. zylinderparabolischen Hohlspiegel, der eine Bündelung in der Achsrichtung bewirken soll, gemäß den obenerwähuten Merkmalen der Erfindung weiterzubilden. Erst hierdurch wird der Vorteil kurzer Zuleitungen ohne Behinderung der Ausstrahlung erzielt.It is indeed a mirror for horizontal omnidirectional radiation in the form an approximately conical surface known, in which the generatrix through a part of a parabolic curve that is not adjacent to the vertex of the parabola is shown will. - However, this known arrangement does not suggest a z. B. parabolic cylinders Concave mirror, which is intended to cause bundling in the axial direction, according to the above Develop features of the invention. This is the only way to have the advantage of short supply lines achieved without hindering the appearance.
Die Abbildung zeigt als Ausführungsbeispiel einen schachtelartigen Zylinderparabolspiegel Z mit parallelen ebenen Seitenwänden W, und W2, dessen in bezug auf die Parabelachse symmetrisch liegende untere-Hälfte im wesentlichen ganz fortgelassen ist. Der strahlende Dipol D befindet sich in der Brennlinie, Also kurz oberhalb .des unteren -End'e's -des Spiegels. Der schematisch dargestellte Sender S ist vor dem fortgelassenen Teil angeordnet, so daß die reflektierten Wellen ungehindert aus der Spiegelöffnung austreten können.As an exemplary embodiment, the figure shows a box-like one Cylinder parabolic mirror Z with parallel flat side walls W, and W2, whose in with respect to the parabolic axis symmetrically lying lower half essentially completely is omitted. The radiating dipole D is in the focal line, so briefly above .the lower end of the mirror. The transmitter shown schematically S is placed in front of the omitted part so that the reflected waves are unhindered can emerge from the mirror opening.
Die durch die Fortlassung der unteren Hälfte entstehende Öffnung auf der Unterseite des Spiegels kann entweder offen bleiben oder durch eine Platte abgeschlossen werden. Im letzteren Falle muß allerdings der Dipol einen genügenden Abstand von der Abschlußplatte haben, der vorzugsweise eine Viertelwellenlänge -betragen soll, damit er phasenrichtig gespiegelt wird. Gegebenenfalls kann die erfindungsgemäße Anordnung auch aus einem üblichen Parabolspiegel gebildet werden, dessen eine Hälfte abgedeckt und damit wirkungslos gemacht ist.The opening created by the omission of the lower half the underside of the mirror can either remain open or closed by a plate will. In the latter case, however, the dipole must have a sufficient distance from the end plate, which should preferably have a quarter-wave length, so that it is mirrored in the correct phase. Optionally, the inventive Arrangement can also be formed from a conventional parabolic mirror, one half of which is covered and thus rendered ineffective.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DET2348D DE861719C (en) | 1940-11-01 | 1940-11-01 | Ultra-short wave arrangement with concave mirror |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DET2348D DE861719C (en) | 1940-11-01 | 1940-11-01 | Ultra-short wave arrangement with concave mirror |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE861719C true DE861719C (en) | 1953-01-05 |
Family
ID=7543813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DET2348D Expired DE861719C (en) | 1940-11-01 | 1940-11-01 | Ultra-short wave arrangement with concave mirror |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE861719C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3733609A (en) * | 1971-07-02 | 1973-05-15 | Radiation Inc | Shrouded offset parabolic reflector antenna |
-
1940
- 1940-11-01 DE DET2348D patent/DE861719C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3733609A (en) * | 1971-07-02 | 1973-05-15 | Radiation Inc | Shrouded offset parabolic reflector antenna |
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