EP1239541A1 - Blitzschutzvorrichtung auf einer Leiterplatte und Verfahren zu deren Herstellung - Google Patents

Blitzschutzvorrichtung auf einer Leiterplatte und Verfahren zu deren Herstellung Download PDF

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Publication number
EP1239541A1
EP1239541A1 EP02290588A EP02290588A EP1239541A1 EP 1239541 A1 EP1239541 A1 EP 1239541A1 EP 02290588 A EP02290588 A EP 02290588A EP 02290588 A EP02290588 A EP 02290588A EP 1239541 A1 EP1239541 A1 EP 1239541A1
Authority
EP
European Patent Office
Prior art keywords
circuit
lightning protection
line
protection according
etched
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.)
Granted
Application number
EP02290588A
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English (en)
French (fr)
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EP1239541B1 (de
Inventor
Jean-Paul Thales Intellectual Prop. Chatenet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thales SA
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Thales SA
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Publication date
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Publication of EP1239541A1 publication Critical patent/EP1239541A1/de
Application granted granted Critical
Publication of EP1239541B1 publication Critical patent/EP1239541B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01P1/203—Strip line filters
    • 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
    • H01P1/212—Frequency-selective devices, e.g. filters suppressing or attenuating harmonic frequencies
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors

Definitions

  • the invention relates to lightning protection of transmitters in a transmission system.
  • FIG. 1 shows a system lightning protection in localized elements. It has two inductors 11 and 12 each connected to ground. The first self 11 is directly connected to the transmitting antenna. It helps attenuate the low frequencies. A capacitor 13 is placed between these two inductors 11 and 12. The capacitor 13 filters the high frequencies. The second self 12 is optional. It improves the attenuation presented.
  • Such lightning protection circuits are made of linear components and discreet. However, they are very bulky and require completion more complicated.
  • the present invention makes it possible to obtain an etched circuit comprising such a lightning protection function thereby reducing size, easier and cheaper to make (due to other, because there are no components).
  • the subject of the invention is an etched circuit with lightning protection comprising at least one main line connected to a connector suitable for the output of the transmitting antenna of a fixed frequency transmission system f 0 or in a band of narrow frequency ⁇ f 0 comprising a capacitor and characterized in that it comprises at least a first line of length I 1 of width constant or not, connected to said connector and terminated by a short-circuit forming an open circuit brought to the main line.
  • the circuit proposed by the invention also allows filtering to be carried out. of the second harmonic.
  • Another object of the invention is the method of manufacturing a circuit engraved with lightning protection according to one of claims 1 to 7 comprising the etching of the lines and of the capacitor of said circuit etched on the base of said circuit, the deposition of a film of conductive material and, if necessary scraping off the excess conductive material in order to prevent as the conductive material that has deposited in the etching.
  • the invention further proposes the application of the etched circuit with lightning protection according to one of the preceding claims 1 to 7 to the filtering of the second harmonic 2f 0 and of the third harmonic 3f 0 .
  • the inductors 11 and 12 are replaced by conductive lines 21 and 22 engraved over a length of a quarter wavelength at the frequency f 0 used. Lines 21 and 22 are each terminated by a short circuit.
  • the main line includes a capacitor 23 placed between these two lines 21 and 22.
  • the first line 21 therefore makes it possible to filter the low frequencies of the lightning signal and reject the second harmonic.
  • the second line 22 is optional. It improves the mitigation presented.
  • the harmonics filtering is a low pass type filtering.
  • the circuits of FIGS. 3 and 4 allow the rejection of the second harmonic 2f 0 and of the third harmonic 3f 0 .
  • the diagram in localized elements of figure 3 comprises 3 capacitors 31, 33 and 35 in parallel connected to earth in one of their ends and 2 inductors 32 and 34, an inductor between each of the two capacitors. Inductors can optionally be placed in series with capacitors 31, 33, 35. They are located between the capacitors and the circuit formed by the two inductors 32 and 34 as shown in figure 3
  • the circuits most commonly used are the circuits with localized elements of FIGS. 1 and 3 are bulky.
  • Distributed constant circuits also take up a lot of space because the capacitors represent rectangles etched on the order of 1 cm 2 on a substrate with high dielectric permittivity (for example on the order of 10) and the quarter wave lines represent lengths of 2 to 3 cm. These dimensions are given by way of example for frequencies of the order of GHz. These dimensions are not negligible, in particular in embedded applications.
  • both the lightning protection function and the harmonics filtering function should be the first to be found after the antenna connector. This is the obvious placement for lightning protection which should protect the entire transmitting circuit.
  • the filtering of the harmonics must also be as far downstream as possible from the transmission since there is a risk of creating harmonics, in particular harmonics 2f 0 and 3f 0 , by the antenna switching circuits or by coupling.
  • the lightning protection circuit according to the invention presented in FIG. 2 already allowed the filtering of the second harmonic 2f 0 by using a single circuit making it possible to overcome these drawbacks.
  • the second line in the lightning protection diagram in Figure 2 gives the possibility of also rejecting the third harmonic.
  • the lengths will then be optimized and an adaptation topology will then be simulated to guarantee optimum rejection at the two harmonics as well as low loss at the fundamental frequency f 0 .
  • This optimization can be obtained using a tool for simulating etched circuits such as ADS from AGILENT technology for example.
  • the circuit optimized for lightning protection and filtering of the second and third harmonics comprises two lines 51 and 52 of respective length I 1 and I 2 determined during the simulation ended by a short circuit to ground .
  • These lines 51 and 52 include open reactance arms (or stub) 54 and 55.
  • the first line is connected to the antenna output connector.
  • a capacitor 53 performs the high-pass filtering of the lightning protection. It is placed between the two lines on the main line.
  • Figure 6 shows the first measures of the harmonics filtering in FIGS. 6a and 6b, they represent the amplitude in dB of the signal in output of a lightning protection circuit according to the invention in function of its frequency.
  • the injected lightning wave is 1000V. It is attenuated around 50 V.
  • FIGS. 6a correspond to the first measurements with a circuit of the type of that of FIG. 5. It shows an attenuation of the signal at output at least 30 dB at the two frequencies 2f 0 and 3f 0 .
  • FIG. 6b corresponds to the measurements obtained after optimization of this circuit. Optimization makes it possible to obtain attenuation values of the signal at the output of the optimized circuit of 40 dB for 2f 0 and 50 dB for 3f 0 .
  • such lightning protection circuits allow the filtering of the second harmonic 2f 0 and of the third harmonic 3f 0 .
  • these circuits can have a common lightning protection function and filtering of one or more harmonics nf 0 (n integer ⁇ 3).
  • the circuit of FIG. 5 is an example of embodiment of a circuit having a common function of lightning protection and harmonics filtering. More generally, it can be envisaged optimize this circuit with the same simulation tools for rejection of the first n harmonics (n integer ⁇ 3).
  • the circuit can have one or more lines terminated by a short circuit identical or different lengths to be determined, widths to be determined constant or not and identical or different, with or without one or several reactance arms (or stub in Anglo-Saxon) whose size is determine.
  • the advantage of such a circuit is therefore the gain in area because the two lightning protection and harmonic filtering functions is realized in a single circuit. In addition, it does not require a large area of etching like the harmonics filtering circuit in figure 4. Indeed, it only uses lines that can be "rolled up" or folded. Another advantage of this type of circuit is the possibility of optimizing them performance and reproducibility. Indeed, it allows a unique adaptation and under control. And, the two functions are the first function seen from the antenna.
  • the manufacture of an engraved circuit with lightning protection as, for example, those illustrated in Figures 2 and 5 includes the engraving lines and capacitor of said circuit etched on the base of said circuit, the depositing a film of conductive material and, if necessary, scraping excess conductive material to keep only the material conductor which is deposited in the engraving.
  • This device can be applied to any field requiring one and / or the other of the two functions.
  • transmitters in all systems of communication dissemination or identification such as IFF, TACAN, DME can use such a circuit.
  • IFF IFF
  • TACAN TACAN
  • DME DME
EP02290588.9A 2001-03-09 2002-03-08 Blitzschutzvorrichtung auf einer Leiterplatte und Verfahren zu deren Herstellung Expired - Lifetime EP1239541B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0103254A FR2821993B1 (fr) 2001-03-09 2001-03-09 Circuit grave de protection contre la foudre
FR0103254 2001-03-09

Publications (2)

Publication Number Publication Date
EP1239541A1 true EP1239541A1 (de) 2002-09-11
EP1239541B1 EP1239541B1 (de) 2014-01-08

Family

ID=8860945

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02290588.9A Expired - Lifetime EP1239541B1 (de) 2001-03-09 2002-03-08 Blitzschutzvorrichtung auf einer Leiterplatte und Verfahren zu deren Herstellung

Country Status (3)

Country Link
US (1) US6977802B2 (de)
EP (1) EP1239541B1 (de)
FR (1) FR2821993B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007029853A1 (en) * 2005-09-05 2007-03-15 Matsushita Electric Works, Ltd. Bandpass filter and resonator
EP2287818A1 (de) * 2004-08-27 2011-02-23 Itron, Inc. Eingebettete Filtervorrichtung

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20020274A1 (it) * 2002-02-13 2003-08-13 Siemens Inf & Comm Networks Dispositivo di protezione di linee di comunicazione a radiofrequenza da sovratensioni indotte da fulmini
US20030232600A1 (en) * 2002-03-18 2003-12-18 Montgomery James P. Passive intermodulation interference control circuits
US20060082946A1 (en) * 2004-10-14 2006-04-20 Rain Bird Corporation Power surge protection in an irrigation controller
JP5038740B2 (ja) 2007-02-23 2012-10-03 パナソニック株式会社 帯域通過フィルタおよびその製造方法
KR101478870B1 (ko) * 2008-09-25 2015-01-02 파나소닉 오토모티브 시스템즈 컴퍼니 오브 어메리카, 디비젼 오브 파나소닉 코포레이션 오브 노쓰 어메리카 정전 방전（ｅｓｄ） 보호 회로 및 방법
CN104577271A (zh) * 2013-10-22 2015-04-29 芯迪半导体科技（上海）有限公司 一种浪涌保护电路
JP7005113B2 (ja) * 2018-04-04 2022-01-21 日本アンテナ株式会社 同軸避雷器
WO2021160246A1 (en) * 2020-02-10 2021-08-19 Advantest Corporation Electrical filter structure

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4985800A (en) * 1989-10-30 1991-01-15 Feldman Nathan W Lighting protection apparatus for RF equipment and the like
EP0689261A1 (de) * 1994-06-24 1995-12-27 Alcatel Cable Schutzeinrichtung gegen Transientenstörungen
EP0803927A2 (de) * 1996-04-26 1997-10-29 SHARP Corporation Dämpfungsfilter für Tuner für Direktrundfunkübertragungssatellitenempfänger
US5844766A (en) * 1997-09-09 1998-12-01 Forem S.R.L. Lightning supression system for tower mounted antenna systems
EP1037308A1 (de) * 1999-03-18 2000-09-20 Telefonaktiebolaget Lm Ericsson Elektrischer Filter zur Filterung niedriger Frequenzen
US6243247B1 (en) * 1998-09-22 2001-06-05 Polyphaser Corporation Stripline transient protection device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2029291A1 (en) * 1990-11-05 1992-05-06 Wilfred Frey Communication line filter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4985800A (en) * 1989-10-30 1991-01-15 Feldman Nathan W Lighting protection apparatus for RF equipment and the like
EP0689261A1 (de) * 1994-06-24 1995-12-27 Alcatel Cable Schutzeinrichtung gegen Transientenstörungen
EP0803927A2 (de) * 1996-04-26 1997-10-29 SHARP Corporation Dämpfungsfilter für Tuner für Direktrundfunkübertragungssatellitenempfänger
US5844766A (en) * 1997-09-09 1998-12-01 Forem S.R.L. Lightning supression system for tower mounted antenna systems
US6243247B1 (en) * 1998-09-22 2001-06-05 Polyphaser Corporation Stripline transient protection device
EP1037308A1 (de) * 1999-03-18 2000-09-20 Telefonaktiebolaget Lm Ericsson Elektrischer Filter zur Filterung niedriger Frequenzen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2287818A1 (de) * 2004-08-27 2011-02-23 Itron, Inc. Eingebettete Filtervorrichtung
WO2007029853A1 (en) * 2005-09-05 2007-03-15 Matsushita Electric Works, Ltd. Bandpass filter and resonator

Also Published As

Publication number Publication date
FR2821993A1 (fr) 2002-09-13
US6977802B2 (en) 2005-12-20
US20020180382A1 (en) 2002-12-05
FR2821993B1 (fr) 2003-06-20
EP1239541B1 (de) 2014-01-08

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