CH174227A - Device for coupling an antenna with a receiving device for electrical waves. - Google Patents
Device for coupling an antenna with a receiving device for electrical waves.Info
- Publication number
- CH174227A CH174227A CH174227DA CH174227A CH 174227 A CH174227 A CH 174227A CH 174227D A CH174227D A CH 174227DA CH 174227 A CH174227 A CH 174227A
- Authority
- CH
- Switzerland
- Prior art keywords
- antenna
- coupling
- receiving device
- electrical waves
- losses
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Coils Or Transformers For Communication (AREA)
Description
Einrichtung zur Kopplung einer Antenne mit einem Empfangsgerät für elektrische Wellen. Es ist bekannt, die Antenne mit dem Empfangsgerät über ein abgeschirmtes An tennenkabel zu verbinden, um die Nahestö rungen zu vermindern. Diese Antennenkabel weisen einen Seelendraht auf, der mit Ab stand vom Abschirmungamantel umgeben ist. Infolge der Kapazität zwischen Seele und Ab schirmungsmantel treten Verluste auf, die mit steigender Frequenz und Spannung zunehmen. Es wurde daher bereits vorgeschlagen, die Empfangsspannung vor ihrer Einführung in das Antennenkabel transformatorisch herab zusetzen, um die kapazitiven Verluste zu ver ringern.
Dabei blieb aber die Frequenzab- hängigkeit der Verluste bestehen, d. h. die Verluste stiegen mit zunehmender Empfangs frequenz an.
Die vorliegende Erfindung bezweckt nun, diese Zunahme der Verluste zu vermindern und erreicht dies dadurch, dass im Antennen kabel zwei oder mehr Seelendrähte vorgese hen sind, die über Transformatoren mit der Antenne in der Weise verbunden sind, dass jeder Seelendraht von einer besonderen Sekun därwicklung gespiesen wird. Auf diese Weise lässt sich der gesamte Empfangsbereich in zwei oder mehr Teilbereiche mit verschiedener Spannungsreduktion unterteilen.
Die Zeichnung zeigt in den Fig. 1 und 2 zwei Ausführungsbeispiele der erfindungsge mässen Einrichtung.
In Fig. 1 ist A die Antenne und .g ein mit zwei Seelendrähten Si. und 82 und einem Abschirmmantel.4s versehenes Antennenkabel. Die Kopplung der Antenne mit den Drähten 8i und .V2 geschieht über die Transformatoren Wpi, Wsi und Wpi, Ws2, die zu einem Auto transformator T mit einer Primär- und zwei Sekundärwicklungen zusammengefasst sind. Zum Empfang der längeren Wellen wird der Empfänger an $2, zum Empfang der kürzeren an<B>81</B> angeschlossen.
E bedeutet in der Zeich nung "Erde".
Beim Ausführungsbeispiel nach Fig. 2 sind zwei baulich getrennt ausgeführte Trans formatoren Ti und T2 vorgesehen, deren Pri- märwicklungen Wpi und Wp2 in Serie liegen. Die kürzeren Wellen werden wieder durch Anschluss des Empfängers an<B>81,</B> die längeren durch Anschluss an 82 empfangen. Im übrigen ist das Ausführungsbeispiel nach Fig. 2 wie dasjenige nach Fig. 1 ausgebildet.
Gleiche Teile sind mit gleichen Bezugszeichen ver sehen. Qm die Frequenzabhängigkeit der Ver luste noch weiter zu reduzieren, als dies mit den Ausführungsbeispielen nach Fig. J. und 2 möglich ist, können mehr als zwei Seelen drähte und entsprechend mehr Transforma toren vorgesehen werden.
Device for coupling an antenna with a receiving device for electrical waves. It is known to connect the antenna to the receiving device via a shielded antenna cable to reduce the Nahestö ments. These antenna cables have a core wire that was surrounded by the shielding jacket. As a result of the capacitance between the core and the shielding jacket, losses occur that increase with increasing frequency and voltage. It has therefore already been proposed to transform the received voltage before it is introduced into the antenna cable to reduce the capacitive losses.
However, the frequency dependence of the losses remained, i. H. the losses increased with increasing reception frequency.
The present invention now aims to reduce this increase in losses and achieves this in that two or more core wires are provided in the antenna cable, which are connected via transformers to the antenna in such a way that each core wire is fed by a special secondary winding becomes. In this way, the entire reception area can be divided into two or more sub-areas with different voltage reductions.
The drawing shows in FIGS. 1 and 2 two embodiments of the device according to the invention.
In Fig. 1, A is the antenna and .g is a with two core wires Si. and antenna cable 82 and a shielding jacket.4s. The coupling of the antenna with the wires 8i and .V2 is done via the transformers Wpi, Wsi and Wpi, Ws2, which are combined into a car transformer T with one primary and two secondary windings. The receiver is connected to $ 2 to receive the longer waves and to <B> 81 </B> to receive the shorter ones.
E means "earth" in the drawing.
In the embodiment according to FIG. 2, two structurally separate transformers Ti and T2 are provided, the primary windings Wpi and Wp2 of which are in series. The shorter waves are received again by connecting the receiver to <B> 81, </B> the longer waves by connecting to 82. Otherwise, the embodiment of FIG. 2 is designed like that of FIG.
Identical parts are provided with the same reference numerals. Qm to reduce the frequency dependence of the losses even further than is possible with the embodiments according to Fig. J. and 2, more than two core wires and correspondingly more transformers can be provided.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH174227T | 1933-06-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH174227A true CH174227A (en) | 1934-12-31 |
Family
ID=4425300
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH174227D CH174227A (en) | 1933-06-08 | 1933-06-08 | Device for coupling an antenna with a receiving device for electrical waves. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH174227A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0314300A2 (en) * | 1987-10-30 | 1989-05-03 | International Business Machines Corporation | Remote connection of a termination network |
-
1933
- 1933-06-08 CH CH174227D patent/CH174227A/en unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0314300A2 (en) * | 1987-10-30 | 1989-05-03 | International Business Machines Corporation | Remote connection of a termination network |
EP0314300A3 (en) * | 1987-10-30 | 1991-04-03 | International Business Machines Corporation | Remote connection of a termination network |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3203689A1 (en) | NETWORK MESSAGE CONNECTION SYSTEM USING THE ZERO AND EARTH PROTECTIVE LADDERS OF A HOUSEHOLD BRANCH | |
DE2127193B2 (en) | Coupling unit for coupling twin cores running insulated in the phase cable of high-voltage lines as carrier frequency lines to communication devices or cables | |
DE2529296A1 (en) | Isolating transformer used as pulse transformer - is for use with high speed pulses and has two annular cores covered in windings | |
DE3232931A1 (en) | ANTENNA | |
CH174227A (en) | Device for coupling an antenna with a receiving device for electrical waves. | |
DE571127C (en) | Circuit arrangement for eliminating radio interference | |
DE752969C (en) | Arrangement for wireless direction determination | |
DE521475C (en) | Transformer, especially measuring transducer, for high voltages, consisting of individual systems connected in cascade with primary windings and thrust and overcoupling windings in series | |
DE855421C (en) | Input filter for overlay receiver | |
DE593051C (en) | Differential transformer, especially for high frequency | |
DE626545C (en) | Telecommunication transmission system with several concentric lines that are combined into one cable and isolated from each other and from earth | |
AT133617B (en) | Antenna arrangement. | |
AT223250B (en) | Arrangement for interconnecting at least two antennas or antenna amplifiers or converters in the television area | |
DE578796C (en) | Arrangement consisting of a wound capacitor and stretched conductors isolated from the capacitor assignments | |
DE504326C (en) | Ring transmitter for multiple telephone traffic | |
DE715076C (en) | Coupling device for high-frequency communication over high-voltage lines | |
DE567876C (en) | Echo sounder or underwater signaling device | |
DE480852C (en) | Multiple antenna arrangement | |
AT138624B (en) | High frequency cables. | |
DE521887C (en) | Current transformer, in particular pot-type current transformer with at least two composite insulating bodies | |
DE671050C (en) | High frequency transmission system | |
DE593135C (en) | High frequency distribution system | |
DE731313C (en) | Arrangement to prevent the influence of standing waves in ultra-short wave systems | |
AT146286B (en) | Antenna arrangement for radio receivers. | |
AT130545B (en) | Telecommunication cable for four-wire operation. |