EP0978894A2 - Coaxial broadband surge voltage arrester - Google Patents

Coaxial broadband surge voltage arrester Download PDF

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Publication number
EP0978894A2
EP0978894A2 EP99115530A EP99115530A EP0978894A2 EP 0978894 A2 EP0978894 A2 EP 0978894A2 EP 99115530 A EP99115530 A EP 99115530A EP 99115530 A EP99115530 A EP 99115530A EP 0978894 A2 EP0978894 A2 EP 0978894A2
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EP
European Patent Office
Prior art keywords
line
surge arrester
section
coaxial
length
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EP99115530A
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German (de)
French (fr)
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EP0978894B1 (en
EP0978894A3 (en
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Manfred Dr. Lang
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Spinner GmbH
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Spinner GmbH
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/202—Coaxial filters

Definitions

  • the invention relates to a broadband coaxial surge arrester, with one to a coaxial line section short-circuit line connected in parallel and one in Series switched idle line.
  • Coaxial surge arresters which consist of a coaxial line section with a short-circuit line connected in parallel, generally a ⁇ / 4 short-circuit line, are known. They are very narrow-band. Even if a VSWR of 1.1 is permitted, only a relative bandwidth of 20% can be achieved. A larger bandwidth can be achieved if the characteristic impedance Z K of the short-circuit line is made larger than the characteristic impedance Z O of the coaxial line section. However, Z K cannot be made arbitrarily large since the remaining residual interference voltage is proportional to Z K.
  • a bandwidth of approximately one octave can be achieved for a VSWR of 1.1 (corresponding to a reflection factor of approximately 0.05) at the edges of the transmission range .
  • the invention has for its object a broadband to create coaxial surge arrester connected to the Edges of a given frequency range has a low reflection factor.
  • connection point of the short-circuit line and the connection point is a transforming one coaxial line section with a length ⁇ / 4.
  • ⁇ is that of the center frequency of the specified frequency range corresponding wavelength. It was determined and can also be shown arithmetically that with the Proposed surge arrester the frequency dependent Course of the reflection factor two very small minima sufficient Bandwidth on both sides of one in the not maximum used. The minima can be more than one octave apart. Your location and their size depend on the dimensioning of the transforming involved Line elements, i.e. the short-circuit line, of the transforming line section and the idling Line, from.
  • the length of the serial transforming Line piece is chosen so that the frequency-dependent Curve reflecting the course of the reflection factor two different operating frequencies of the surge arrester each has a minimum (claim 2).
  • the wave resistance of the short-circuit line is expedient high impedance and the characteristic impedance of the idling Cable with lower resistance than the characteristic impedance of the Dimensioned coaxial line section (claim 3).
  • the characteristic impedance of the short-circuit line two to three times the characteristic impedance of the coaxial line and the characteristic impedance of the idle line about half to a quarter of the wave resistance of the Coaxial line section. (Claim 4).
  • the surge arrester on the given proposal also has the advantage of being smaller than a surge arrester according to the state of the art, because both Length of the short-circuit line as well as the length of the open circuit Line can be chosen to be about 20 to 30% smaller than ⁇ / 4 be (claims 5 and 6).
  • the length of the serial transforming coaxial line piece about 20 to 50% of ⁇ / 4 (claim 7).
  • the idle Line from a section of reduced diameter the inner conductor of the transforming coaxial line section, a sleeve surrounding this section from a dielectric material whose length is the length of the idle Line corresponds and coaxial from a sleeve enclosing tubular portion of the coaxial line continuing inner conductor in cooperation with the continuous Outer conductor of the surge arrester (claim 8).
  • the surge arrester shown in Fig. 1 is here designed as a coaxial assembly, which on their two Ends with plug connections basically any and here is of a type of no particular interest.
  • the surge arrester is reciprocal and includes a coaxial Line section 1, a short-circuit line connected in parallel 2, a short, transforming coaxial Line piece 3 and an idling one connected in series Line 4.
  • the outer conductor 25 of the short-circuit line 2 can be part of the other line sections common Outer conductor 5 are considered.
  • With the inner conductor 11 of the coaxial line section 1 is, as usual, the inner conductor 21 of the short-circuit line 2 connected, etc. here after the Plug / socket principle. At its other end is the inner conductor 21 electrically connected to the outer conductor 25.
  • the length of the short-circuit line is less than ⁇ / 4, where ⁇ is the arithmetic, but not used, band center frequency corresponding wavelength is.
  • the diameter of the inner conductor 21 and the inner diameter of the outer conductor 25 of the short-circuit line are according to the known context chosen so that the characteristic impedance of the short-circuit line about two to three times the wave resistance the coaxial line.
  • the transforming line section 3 follows in Series the idle line 4. This can be about have the same length as the short-circuit line 2 and includes an inner conductor 41 which continues the inner conductor 31, whose diameter is considerably smaller than that of the Inner conductor 31 is.
  • the idle line also includes a sleeve 42 surrounding this inner conductor 41 from a dielectric material.
  • the sleeve 42 has a circumferential Flange 42a, the tubular surrounding the sleeve Section 45 of the inner conductor continuing the coaxial line from the inner conductor 41 of the transforming line section 3 electrically separates. That is why the tubular Section 45 the outer conductor of the idle line 4.
  • According to the given diameter ratios and the dielectric constant of the sleeve 42 has a characteristic impedance, which is about half to a quarter of the wave resistance of the coaxial line section 1.

Abstract

The broadband coaxial cable overload voltage conductor is in the form of a tee piece that has a coaxial conductor section (3) with a length less than a quarter wavelength. The unit has a short circuit line (2) of dimensions such that the wave resistance is between two and three times that of the coaxial line.

Description

Die Erfindung betrifft einen breitbandigen koaxialen Überspannungsableiter, mit einer zu einem Koaxialleitungsabschnitt parallel geschalteten Kurzschlußleitung und einer in Serie geschalteten leerlaufenden Leitung.The invention relates to a broadband coaxial surge arrester, with one to a coaxial line section short-circuit line connected in parallel and one in Series switched idle line.

Koaxiale Überspannungsableiter, die aus einem Koaxialleitungsabschnitt mit parallel geschalteter Kurzschlußleitung, in der Regel eine λ/4-Kurzschlußleitung, bestehen, sind bekannt. Sie sind sehr schmalbandig. Auch wenn man ein VSWR von 1,1 zuläßt, ist nur eine relative Bandbreite von 20 % realisierbar. Eine größere Bandbreite läßt sich erreichen, wenn man den Wellenwiderstand ZK der Kurzschlußleitung größer als den Wellenwiderstand ZO des Koaxialleitungsabschnitts macht. Allerdings kann ZK nicht beliebig groß gemacht werden, da die verbleibende Reststörspannung proportional zu ZK ist. Schaltet man jedoch der Parallelschaltung aus dem Koaxialleitungsabschnitt und der Kurzschlußleitung in Serie eine leerlaufende Leitung nach, so läßt sich für ein VSWR von 1,1 (entsprechend einem Reflexionsfaktor von etwa 0,05) an den Rändern des Übertragungsbereiches eine Bandbreite von etwa einer Oktave erreichen.Coaxial surge arresters, which consist of a coaxial line section with a short-circuit line connected in parallel, generally a λ / 4 short-circuit line, are known. They are very narrow-band. Even if a VSWR of 1.1 is permitted, only a relative bandwidth of 20% can be achieved. A larger bandwidth can be achieved if the characteristic impedance Z K of the short-circuit line is made larger than the characteristic impedance Z O of the coaxial line section. However, Z K cannot be made arbitrarily large since the remaining residual interference voltage is proportional to Z K. However, if one connects an idle line to the parallel connection of the coaxial line section and the short-circuit line in series, a bandwidth of approximately one octave can be achieved for a VSWR of 1.1 (corresponding to a reflection factor of approximately 0.05) at the edges of the transmission range .

Ein derartiger Überspannungsableiter ist allerdings nur bedingt geeignet, wenn über die Leitung zwei schmale Frequenzbänder übertragen werden müssen, deren Mittenfrequenzen sehr weit, z.B. eine Oktave, auseinander liegen. Dies gilt u.a. für den Mobilfunk, wo die Signale des D-Netzes (890 bis 960 MHz) und des E-Netzes (1710 bis 1880 MHz) über ein gemeinsames Antennenkabel zur Antenne der Basisstation übertragen werden. However, such a surge arrester is only limited suitability if two narrow frequency bands are connected via the cable must be transmitted, their center frequencies very far, e.g. one octave apart. this applies i.a. for mobile radio, where the signals of the D network (890 to 960 MHz) and the E network (1710 to 1880 MHz) via a common one Transfer the antenna cable to the antenna of the base station become.

Der Erfindung liegt die Aufgabe zugrunde, einen breitbandigen koaxialen Überspannungsableiter zu schaffen, der an den Rändern eines vorgegebenen Frequenzbereiches einen besonders niedrigen Reflexionsfaktor hat.The invention has for its object a broadband to create coaxial surge arrester connected to the Edges of a given frequency range has a low reflection factor.

Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß zwischen dem Anschlußpunkt der Kurzschlußleitung und dem Anschlußpunkt der leerlaufenden Leitung ein transformierendes koaxiales Leitungsstück mit einer Länge < λ/4 liegt.This object is achieved in that between the connection point of the short-circuit line and the connection point the idle line is a transforming one coaxial line section with a length <λ / 4.

Dabei ist λ die der Mittenfrequenz des vorgegebenen Frequenzbereichs entsprechende Wellenlänge. Es wurde festgestellt und läßt sich auch rechnerisch zeigen, daß bei dem vorgeschlagenen Überspannungsableiter der frequenzabhängige Verlauf des Reflexionsfaktors zwei sehr kleine Minima ausreichender Bandbreite beidseits eines etwa in der nicht genutzten Bandmitte liegenden Maximums hat. Die Minima können mehr als eine Oktave auseinanderliegen. Ihre Lage und ihre Größe hängen von der Bemessung der beteiligten, transformierenden Leitungselemente, also der Kurzschlußleitung, des transformierenden Leitungsstücks und der leerlaufenden Leitung, ab.Here λ is that of the center frequency of the specified frequency range corresponding wavelength. It was determined and can also be shown arithmetically that with the Proposed surge arrester the frequency dependent Course of the reflection factor two very small minima sufficient Bandwidth on both sides of one in the not maximum used. The minima can be more than one octave apart. Your location and their size depend on the dimensioning of the transforming involved Line elements, i.e. the short-circuit line, of the transforming line section and the idling Line, from.

Insbesondere kann die Länge des seriellen transformierenden Leitungsstücks so gewählt ist, daß die den frequenzabhängigen Verlauf des Reflexionsfaktors wiedergebende Kurve bei zwei unterschiedlichen Betriebsfrequenzen des Überspannungsableiters je ein Minimum aufweist (Anspruch 2).In particular, the length of the serial transforming Line piece is chosen so that the frequency-dependent Curve reflecting the course of the reflection factor two different operating frequencies of the surge arrester each has a minimum (claim 2).

Zweckmäßig ist dabei der Wellenwiderstand der Kurzschlußleitung hochohmiger und der Wellenwiderstand der leerlaufenden Leitung niederohmiger als der Wellenwiderstand des Koaxialleitungsabschnitts bemessen (Anspruch 3).The wave resistance of the short-circuit line is expedient high impedance and the characteristic impedance of the idling Cable with lower resistance than the characteristic impedance of the Dimensioned coaxial line section (claim 3).

Insbesondere kann der Wellenwiderstand der Kurzschlußleitung das zwei- bis dreifache des Wellenwiderstandes der Koaxialleitung und der Wellenwiderstand der leerlaufenden Leitung etwa die Hälfte bis ein Viertel des Wellenwiderstandes des Koaxialleitungsabschnitts betragen. (Anspruch 4).In particular, the characteristic impedance of the short-circuit line two to three times the characteristic impedance of the coaxial line and the characteristic impedance of the idle line about half to a quarter of the wave resistance of the Coaxial line section. (Claim 4).

Der Überspannungsableiter nach dem vorliegenden Vorschlag hat auch den Vorteil, kleiner zu bauen als ein Überspannungsableiter nach dem Stand der Technik, denn sowohl die Länge der Kurzschlußleitung als auch die Länge der leerlaufenden Leitung können etwa 20 bis 30 % kleiner als λ/4 gewählt werden (Ansprüche 5 und 6).The surge arrester on the given proposal also has the advantage of being smaller than a surge arrester according to the state of the art, because both Length of the short-circuit line as well as the length of the open circuit Line can be chosen to be about 20 to 30% smaller than λ / 4 be (claims 5 and 6).

Für die meisten Anwendungen kann die Länge des seriellen transformierenden koaxialen Leitungsstücks etwa 20 bis 50 % von λ/4 betragen (Anspruch 7).For most applications, the length of the serial transforming coaxial line piece about 20 to 50% of λ / 4 (claim 7).

Bei einer bevorzugten Ausführungsform besteht die leerlaufenden Leitung aus einem Abschnitt verringerten Durchmessers des Innenleiters desr transformierenden koaxiallen Leitungsstücks, einer diesen Abschnitt umgebenden Hülse aus einem dielektrischen Werkstoff, deren Länge der Länge der leerlaufenden Leitung entspricht und aus einem die Hülse koaxial umschließenden rohrförmigen Abschnitt des die Koaxialleitung fortsetzenden Innenleiters im Zusammenwirken mit dem durchgehenden Außenleiter des Überspannungsableiters (Anspruch 8).In a preferred embodiment, there is the idle Line from a section of reduced diameter the inner conductor of the transforming coaxial line section, a sleeve surrounding this section from a dielectric material whose length is the length of the idle Line corresponds and coaxial from a sleeve enclosing tubular portion of the coaxial line continuing inner conductor in cooperation with the continuous Outer conductor of the surge arrester (claim 8).

In der Zeichnung ist ein Überspannungsableiter nach der Erfindung in einer beispielhaft gewählten Ausführungsform schematisch vereinfacht dargestellt und dessen Reflexionsverhalten durch ein Diagramm erläutert. Es zeigt:

Fig. 1
den Überspannungsableiter im Längsschnitt
Fig. 2
den frequenzabhängigen Verlauf des Reflexionsfaktors für ein praktisches Ausführungsbeispiel des Überspannungsableiters.
Fig. 3
eine stark vereinfachte Darstellung des Überspannungsableiters, nur zur Erläuterung der Bedeutung der Rechengrößen, auf denen das Refelexionsdiagramm in Fig. 2 beruht.
In the drawing, a surge arrester according to the invention is shown schematically simplified in an exemplary embodiment selected and its reflection behavior is explained by a diagram. It shows:
Fig. 1
the surge arrester in longitudinal section
Fig. 2
the frequency-dependent course of the reflection factor for a practical embodiment of the surge arrester.
Fig. 3
a greatly simplified representation of the surge arrester, only to explain the meaning of the arithmetic variables on which the reflection diagram in Fig. 2 is based.

Der in Fig. 1 dargestellte Überspannungsableiter ist hier als koaxiale Baugruppe ausgebildet, die an ihren beiden Enden mit Steckanschlüssen grundsätzlich beliebiger und hier nicht näher interessierender Art ausgestattet ist. Der Überspannungsableiter ist reziprok und umfaßt einen koaxialen Leitungsabschnitt 1, eine dazu parallel geschaltete Kurzschlußleitung 2, ein kurzes, transformierendes koaxiales Leitungsstück 3 und eine dazu in Serie geschaltete, leerlaufende Leitung 4. Der Außenleiter 25 der Kurzschlußleitung 2 kann als Teil des den übrigen Leitungsabschnitten gemeinsamen Außenleiters 5 betrachtet werden. Mit dem Innenleiter 11 des Koaxialleitungsabschnitts 1 ist wie üblich der Innenleiter 21 der Kurzschlußleitung 2 verbunden, uzw. hier nach dem Stecker/Buchse-Prinzip. An seinem anderen Ende ist der Innenleiter 21 mit dem Außenleiter 25 elektrisch leitend verbunden. Die Länge der Kurzschlußleitung ist kleiner als λ/4, wobei λ die der rechnerischen, jedoch nicht genutzten Bandmittenfrequenz entsprechende Wellenlänge ist. Der Durchmesser des Innenleiters 21 und der Innendurchmesser des Außenleiters 25 der Kurzschlußleitung sind nach dem bekannten Zusammenhang so gewählt, daß der Wellenwiderstand der Kurzschlußleitung etwa das zwei- bis dreifache des Wellenwiderstandes der Koaxialleitung beträgt.The surge arrester shown in Fig. 1 is here designed as a coaxial assembly, which on their two Ends with plug connections basically any and here is of a type of no particular interest. The surge arrester is reciprocal and includes a coaxial Line section 1, a short-circuit line connected in parallel 2, a short, transforming coaxial Line piece 3 and an idling one connected in series Line 4. The outer conductor 25 of the short-circuit line 2 can be part of the other line sections common Outer conductor 5 are considered. With the inner conductor 11 of the coaxial line section 1 is, as usual, the inner conductor 21 of the short-circuit line 2 connected, etc. here after the Plug / socket principle. At its other end is the inner conductor 21 electrically connected to the outer conductor 25. The length of the short-circuit line is less than λ / 4, where λ is the arithmetic, but not used, band center frequency corresponding wavelength is. The diameter of the inner conductor 21 and the inner diameter of the outer conductor 25 of the short-circuit line are according to the known context chosen so that the characteristic impedance of the short-circuit line about two to three times the wave resistance the coaxial line.

An den Verbindungspunkt des Innenleiters 11 des Koaxialleitungsabschnitts 1 und des Innenleiters 21 der Kurzschlußleitung 20 schließt sich der Innenleiter 31 des transformierenden Leitungsstücks 3 an. Die Länge dieses Leitungsstücks ist in der Regel kleiner als λ/8. Der nur schematisch dargestellte Durchmessersprung dient der Kompensation der Öffnung in dem Außenleiter 5, über die der Innenleiter 21 der Kurzschlußleitung 2, gehalten von einer Isolierstoffscheibe 22, herausgeführt ist.At the connection point of the inner conductor 11 of the coaxial line section 1 and the inner conductor 21 of the short-circuit line 20 closes the inner conductor 31 of the transforming Line section 3. The length of this line piece is usually less than λ / 8. The only shown schematically Jump in diameter serves to compensate for the opening in the outer conductor 5, via which the inner conductor 21 of the short-circuit line 2, held by an insulating disk 22, is brought out.

An das transformierende Leitungsstück 3 schließt sich in Serie die leerlaufende Leitung 4 an. Diese kann etwa die gleiche Länge wie die Kurzschlußleitung 2 haben und umfaßt einen den Innenleiter 31 fortsetzenden Innenleiter 41, dessen Durchmesser erheblich kleiner als derjenige des Innenleiters 31 ist. Weiter umfaßt die leerlaufende Leitung eine diesen Innenleiter 41 umgebende Hülse 42 aus einem dielektrischen Werkstoff. Die Hülse 42 hat einen umlaufenden Flansch 42a, der den rohrförmigen, die Hülse umgebenden Abschnitt 45 des die Koaxialleitung fortsetzenden Innenleiters von dem Innenleiter 41 des transformierenden Leitungsstücks 3 elektrisch trennt. Deshalb bildet der rohrförmige Abschnitt 45 den Außenleiter der leerlaufenden Leitung 4. Diese hat zufolge der gegebenen Durchmesserverhältnisse und der Dielektrizitätskonstanten der Hülse 42 einen Wellenwiderstand, der etwa die Hälfte bis ein Viertel des Wellenwiderstandes des Koaxialleitungsabschnitts 1 beträgt.The transforming line section 3 follows in Series the idle line 4. This can be about have the same length as the short-circuit line 2 and includes an inner conductor 41 which continues the inner conductor 31, whose diameter is considerably smaller than that of the Inner conductor 31 is. The idle line also includes a sleeve 42 surrounding this inner conductor 41 from a dielectric material. The sleeve 42 has a circumferential Flange 42a, the tubular surrounding the sleeve Section 45 of the inner conductor continuing the coaxial line from the inner conductor 41 of the transforming line section 3 electrically separates. That is why the tubular Section 45 the outer conductor of the idle line 4. According to the given diameter ratios and the dielectric constant of the sleeve 42 has a characteristic impedance, which is about half to a quarter of the wave resistance of the coaxial line section 1.

Mit folgenden Größen

ZO =
Impedanz der Überspannungsableitung
Zk =
Eingangsimpedanz (Blindwiderstand) der Kurzschlußleitung
Z3 =
Wellenwiderstand der transformierenden Leitung mit der Länge l3
ZL =
Eingangsimpedanz (Blindwiderstand) des Leerlaufs
lk =
Länge der Kurzschlußleitung
l3 =
Länge der transformierenden Leitung
lL =
Länge der Leerlaufleitung
f =
Frequenz
gelten entsprechend den bekannten Transformationsgleichungen folgende Beziehungen zur Ermittlung des frequenzabhängigen Reflexionsfaktors r(f): ZK(f):=j ·ZK·tan2·π·1K·f·εr c ·103    Z1(f):=Z0·ZK(f)Z0+ZK(f) Z2(f):=Z1(f)·1+ Z3 Z1(f) ·i ·tan2·π·13·f·εr ·103 c 1+ Z1(f)Z3 ·i ·tan2·π·13·f·εr ·103 c ZL(f):=-i ·ZL·1tan2·π·1L·f·εr c ·103    Z3(f):=Z2(f)+ZL(f) r(f):=Z3(f)-Z0 Z3(f)+Z0 rabs(f):=(Re(r(f)))2+(Im(r(f)))2 With the following sizes
Z O =
Impedance of the surge arrester
Z k =
Input impedance (reactance) of the short-circuit line
Z 3 =
Wave resistance of the transforming line with the length l 3
Z L =
Input impedance (reactance) of the open circuit
l k =
Length of the short-circuit line
l 3 =
Length of the transforming line
l L =
Length of the idle line
f =
frequency
In accordance with the known transformation equations, the following relationships apply for determining the frequency-dependent reflection factor r (f): Z. K (f): = jZ K Tan 2 · π · 1 K · f · ε r c · 10 3rd Z. 1 (f): = Z. 0 · Z K (f) Z. 0 + Z K (f) Z. 2nd (f): = Z 1 (f) 1+ Z. 3rd Z. 1 (f) · I · tan 2 · π · 1 3rd · F · ε r · 10 3rd c 1+ Z. 1 (f) Z. 3rd · I · tan 2 · π · 1 3rd · F · ε r · 10 3rd c Z. L (f): = - iZ L · 1 tan 2 · π · 1 L · f · ε r c · 10 3rd Z. 3rd (f): = Z 2nd (f) + Z L (f) r (f): = Z. 3rd (f) -Z 0 Z. 3rd (f) + Z 0 r Section (f): = (Re (r (f))) 2nd + (Im (r (f))) 2nd

Mit folgenden Werten der in die schematisierte Darstellung des Überspannungsableiters in Fig. 3 eingetragenen Größen: f:=800,810.. 2000 MHz   Z0:=50 Ohm   c=3·108 m/s   εr:=l ZK:=120 Ohm   lK:=40 mm ZL:=20.743 Ohm   lL:=40 mm Z3:=50 Ohm   l3:=12 mm ergibt sich der in Fig. 2 dargestellte Verlauf des Reflexionsfaktors r für ein Ausführungsbeispiel eines Überspannungsableiters, der zur Verwendung in einem gemeinsamen Antennenkabel einer D-Netz- und einer E-Netz-Basisstation ausgelegt ist.With the following values of the quantities entered in the schematic representation of the surge arrester in FIG. 3: f: = 800.810 .. 2000 MHz Z 0 : = 50 ohm c = 3 · 10 8th m / s ε r : = l Z. K : = 120 ohm l K : = 40 mm Z. L : = 20,743 ohms l L : = 40 mm Z. 3rd : = 50 ohm l 3rd : = 12 mm The course of the reflection factor r shown in FIG. 2 results for an exemplary embodiment of a surge arrester which is designed for use in a common antenna cable of a D-network and an E-network base station.

Claims (8)

Breitbandiger koaxialer Überspannungsableiter, mit einer zu einem Koaxialleitungsabschnitt (1) parallel geschalteten Kurzschlußleitung (2) und einer in Serie geschalteten leerlaufenden Leitung (4), dadurch gekennzeichnet, daß zwischen dem Anschlußpunkt der Kurzschlußleitung (2) und dem Anfang der leerlaufenden Leitung (4) ein transformierendes koaxiales Leitungsstück (3) mit einer Länge < λ/4 liegt.Broadband coaxial surge arrester, with a short-circuit line (2) connected in parallel to a coaxial line section (1) and an idle line (4) connected in series, characterized in that between the connection point of the short-circuit line (2) and the start of the idle line (4) a transforming coaxial line piece (3) with a length <λ / 4. Überspannungsableiter nach Anspruch 1, dadurch gekennzeichnet, daß die Länge des transformierenden Leitungsstücks (3) so gewählt ist, daß die den frequenzabhängigen Verlauf des Reflexionsfaktors wiedergebende Kurve bei zwei unterschiedlichen Betriebsfrequenzen des Überspannungsableiters je ein Minimum aufweist.Surge arrester according to claim 1, characterized in that the length of the transforming line section (3) is chosen so that the frequency-dependent Representation of the course of the reflection factor Curve at two different operating frequencies of the surge arrester has a minimum. Überspannungsableiter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Wellenwiderstand der Kurzschlußleitung (2) hochohmiger und der Wellenwiderstand der leerlaufenden Leitung (4) niederohmiger als der Wellenwiderstand des Koaxialleitungsabschnitts (1) bemessen ist.Surge arrester according to claim 1 or 2, characterized characterized in that the characteristic impedance of the short-circuit line (2) high impedance and the characteristic impedance the idling line (4) with lower resistance than that Characteristic impedance of the coaxial line section (1) is measured. Überspannungsableiter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Wellenwiderstand der Kurzschlußleitung (2) das zwei- bis dreifache des Wellenwiderstandes des Koaxialleitungsabschnitts (1) und der Wellenwiderstand der leerlaufenden Leitung (4) etwa die Hälfte bis ein Viertel des Wellenwiderstandes des Koaxialleitungsabschnitts (1) beträgt.Surge arrester according to one of claims 1 to 3, characterized in that the wave resistance the short-circuit line (2) two to three times the Characteristic impedance of the coaxial line section (1) and the characteristic impedance of the idle line (4) about half to a quarter of the wave resistance of the coaxial line section (1). Überspannungsableiter nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Länge der Kurzschlußleitung (2) etwa 20 bis 30 % kleiner als λ/4 ist.Surge arrester according to one of claims 1 to 4, characterized in that the length of the short-circuit line (2) about 20 to 30% smaller than λ / 4 is. Überspannungsableiter nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Länge der leerlaufenden Leitung (4) etwa 20 bis 30 % kleiner als λ/4 ist.Surge arrester according to one of claims 1 to 5, characterized in that the length of the idling Line (4) is about 20 to 30% smaller than λ / 4 is. Überspannungsableiter nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Länge des transformierenden koaxialen Leitungsstücks (3) etwa 20 bis 50 % von λ/4 beträgt.Surge arrester according to one of claims 1 to 6, characterized in that the length of the transforming coaxial line section (3) about 20 to 50 % of λ / 4. Überspannungsableiter nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die leerlaufende Leitung (4) aus einem Abschnitt (41) verringerten Durchmessers des Innenleiters (31) des transformierenden koaxiallen Leitungsstücks (3), einer diesen Abschnitt umgebenden Hülse (42) aus einem dielektrischen Werkstoff, deren Länge der Länge der leerlaufenden Leitung (4) entspricht und aus einem die Hülse (42) koaxial umschließenden rohrförmigen Abschnitt (45) des anschließenden Innenleiters im Zusammenwirken mit dem durchgehenden Außenleiter (5) des Überspannungsableiters besteht.Surge arrester according to one of claims 1 to 7, characterized in that the idle line (4) from a section (41) of reduced diameter of the inner conductor (31) of the transforming coaxial line section (3), one of this section surrounding sleeve (42) made of a dielectric material, their length the length of the idle line (4) corresponds to and from a sleeve (42) coaxially enclosing tubular section (45) of the subsequent Inner conductor in cooperation with the continuous outer conductor (5) of the surge arrester consists.
EP99115530A 1998-08-06 1999-08-05 Coaxial broadband surge voltage arrester Expired - Lifetime EP0978894B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19835531 1998-08-06
DE19835531 1998-08-06

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EP (1) EP0978894B1 (en)
AT (1) ATE282898T1 (en)
DE (1) DE59911074D1 (en)
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HK (1) HK1025677A1 (en)

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EP1691379A3 (en) * 2005-02-15 2006-11-08 Spinner GmbH Coaxial surge arrester
DE10241431B4 (en) * 2001-09-06 2012-12-27 Ntt Docomo Inc. Overvoltage protection system for a coaxial transmission line

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DE19936869C1 (en) 1999-08-05 2001-03-08 Spinner Gmbh Elektrotech Coaxial surge arrester
US6926555B2 (en) * 2003-10-09 2005-08-09 Radio Frequency Systems, Inc. Tuned radio frequency coaxial connector
ATE478448T1 (en) * 2006-07-27 2010-09-15 Huber+Suhner Ag SURGE PROTECTION FOR A COAXIAL LINE
US8134818B2 (en) * 2008-04-08 2012-03-13 John Mezzalingua Associates, Inc. Quarter wave stub surge suppressor with coupled pins
DE102009007622B4 (en) 2009-02-05 2011-04-21 Spinner Gmbh Coaxial surge arrester

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WO2003007424A1 (en) * 2001-07-10 2003-01-23 Rohde & Schwarz Gmbh & Co. Kg Broad-scale lightening protection device
DE10241431B4 (en) * 2001-09-06 2012-12-27 Ntt Docomo Inc. Overvoltage protection system for a coaxial transmission line
EP1691379A3 (en) * 2005-02-15 2006-11-08 Spinner GmbH Coaxial surge arrester
EP1763041A1 (en) * 2005-02-15 2007-03-14 Spinner GmbH Coaxial surge arrester

Also Published As

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EP0978894B1 (en) 2004-11-17
ATE282898T1 (en) 2004-12-15
ES2232053T3 (en) 2005-05-16
EP0978894A3 (en) 2001-07-25
DE59911074D1 (en) 2004-12-23
US6266224B1 (en) 2001-07-24
HK1025677A1 (en) 2000-11-17

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