EP3537533A1 - Dispositif filtrant d'arrêt - Google Patents

Dispositif filtrant d'arrêt Download PDF

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Publication number
EP3537533A1
EP3537533A1 EP19161013.8A EP19161013A EP3537533A1 EP 3537533 A1 EP3537533 A1 EP 3537533A1 EP 19161013 A EP19161013 A EP 19161013A EP 3537533 A1 EP3537533 A1 EP 3537533A1
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EP
European Patent Office
Prior art keywords
resonator
tuning
signal conductor
cavity
filter 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.)
Granted
Application number
EP19161013.8A
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German (de)
English (en)
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EP3537533B1 (fr
Inventor
René ROEDER
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.)
Antonics - Icp GmbH
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Antonics - Icp GmbH
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Publication date
Application filed by Antonics - Icp GmbH filed Critical Antonics - Icp GmbH
Publication of EP3537533A1 publication Critical patent/EP3537533A1/fr
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Publication of EP3537533B1 publication Critical patent/EP3537533B1/fr
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Classifications

    • 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
    • H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
    • H01P1/2053—Comb or interdigital filters; Cascaded coaxial cavities the coaxial cavity resonators being disposed parall to each other
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/04—Coaxial resonators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
    • H01Q9/265—Open ring dipoles; Circular dipoles

Definitions

  • the invention relates to a notch filter arrangement having a signal conductor and having at least one tuning element interacting with the signal conductor. It refers in particular to a special embodiment of the last-mentioned tuning element.
  • radio-based data transmission namely for the transmission of voice data and other data, in particular measurement data, process data and control data
  • radio a larger number of radio transmission techniques has become established.
  • the wireless the wireless technology
  • the TETRA radio or Bluetooth just to name a few.
  • the emergence of these different radio transmission techniques is on the one hand by their respective different purpose, on the other hand also developmental history, that is conditioned by the general progress of technical development. The latter also applies, in particular, to a diversification into different forms of expression which sometimes takes place within a radio transmission technology combined under the same term.
  • An example of this is in particular the mobile radio technology which has developed over the decades of its use over different mobile radio generations described in each case by corresponding standards.
  • multifeed antennas In order not to have to arrange a larger number of antennas on the system or device in question in the case of simultaneous use of different radio transmission techniques and generations of such transmission techniques with a technical system or for a technical device, so-called multifeed antennas have been developed. Such antennas support the reception and transmission of signals in a plurality of frequency bands as well as utilizing differently modulated radio bearer signals. Accordingly, radio frequency signals of different radio transmission techniques are performed in sections in the system, such as in antenna feed lines for corresponding multifeed antennas, in common.
  • a practical example of such requirements is, inter alia, the use of different radio-supported communication paths in the railway technology.
  • the passengers In modern passenger trains, the passengers should be able to use different mobile radio standards for communication and the Internet for data exchange via radio using mobile devices carried along by them.
  • the WLAN technology and the operational processes of the TETRA radio are used, with WLAN both inside the wagons and is also used for the transmission of data from the outside into the train inside and vice versa.
  • the GSM mobile radio technology in a specially provided for this frequency band, the frequency band GSM-R (also GSM rail) used.
  • the modem can still partially or nevertheless output power in the GSM-R range and radiate it via the antenna (s) for a short time.
  • the GSM-R is temporarily disturbed by the GSM-P / UMTS / LTE, which is not permitted, since GSM-R must be decoupled at 60dB at any time to all other radio transmission systems. Therefore, it requires appropriate filter technology to lock this frequency range in certain transmission paths.
  • the high-frequency or cut-off filters used to date for this purpose ensure this, they work partially not completely satisfactory insofar as they often cause an undesirably high attenuation even for non-locked frequency ranges.
  • the filter arrangement described in the publication consists essentially of a double-sided closed waveguide section, in which two dielectric resonator elements, that is, two elements filled with a dielectric material are arranged.
  • two dielectric resonator elements that is, two elements filled with a dielectric material are arranged.
  • the object of the invention is to provide an alternative notch filter arrangement which is suitable by the basic principle of their training to selectively lock individual frequency ranges, with comfortable adjustability of a defined attenuation measure, on the one hand sufficiently attenuated the frequency range to be blocked, but on the other hand adjacent thereto Frequency ranges experienced only very little to no attenuation.
  • the arrangement should therefore make it possible, with appropriate configuration, to generate very sharp edges between unlocked and locked frequency ranges of a high-frequency signal.
  • the arrangement should be buildable due to their design under stress of only a small amount of space and preferably very close to an antenna in existing systems.
  • the proposed for solving the problem blocking filter arrangement comprises at least one tuning element for blocking a frequency range of a in a signal conductor guided high-frequency signal, which is formed by a resonator and introduced into this resonator tuning elements.
  • the at least one tuning element in an interactive signal conductor in view of the arrangement and design of the tuning elements of the tuning element to be explained in more detail, itself also as part of the notch filter arrangement according to the invention.
  • the resonator of the at least one tuning element consists of a resonator chamber enclosed by an electrically conductive and electrically grounded resonator housing and of a resonance body arranged in the resonator chamber.
  • its natural body frequency is determined in particular by the shape and the volume of the resonance body, which at the same time defines a resonant fundamental frequency of the resonator.
  • the degree of attenuation to be determined in each case depends on the particular application, namely on how strong a corresponding attenuation / suppression of a frequency range must be, so that it can be regarded as blocking this frequency range for the particular application in question. Further discussions should not be made here.
  • the resonance body of the resonator of the at least one tuning element is designed and brought into interaction with the said tuning elements such that it has a first cavity extending from a loose end of the sounding body in the direction of its longitudinal axis into the resonance body, in which a first, protrudes with the electrical ground galvanically connected tuning members.
  • a loose end of the resonant body according to the characterization of this end as a loose end is not with the housing of the resonator connected and not brought into contact with this.
  • the relevant end of the resonance body can therefore actually oscillate freely with the body's natural frequency of the resonance body, ie with the resonance frequency determined by it.
  • the frequency with which the resonance body is actually able to oscillate is deliberately influenced by the tuning element projecting into the first cavity of the resonance body in such a way that this frequency is detuned from the resonance fundamental frequency to a desired lower resonance frequency.
  • the length of penetration of the first tuning member into the first cavity of the resonator body as well as the geometries of this tuning member and the first cavity itself essentially determine the degree of detuning the frequency relative to the fundamental resonant frequency.
  • the resonator also has a second cavity which extends separately from the first cavity and extends orthogonally to the resonant body.
  • this second cavity protrudes a galvanically connected to the signal conductor second tuning member. Due to the length of the intrusion of this second voting member into the second cavity and its geometry (geometry of the second cavity on the one hand and geometry of the second voting member on the other hand) essentially the attenuation amount is determined with which guided in the signal conductor high-frequency signal in a frequency range to the is damped by the first tuning member specific resonant frequency of the resonator around.
  • the resonance frequency determined by the interaction of the first cavity of the resonator body with the first tuning member projecting into this cavity ultimately represents, as it were, a center frequency of a non-infinitesimal frequency range subject to attenuation with the attenuation amount determined by the second tuner.
  • the tuning elements projecting into the cavities of the resonance body of the at least one tuning element are cylindrical or rod-shaped, with a non-circular cross-sectional area.
  • both tuning members may have the same or a different shape.
  • the tuning members may possibly even have a nearly identical geometry, wherein both tuning members will differ regularly in terms of their length and thus the length of their intrusion into each brought into interaction with each cavity of the resonator.
  • Each of the tuning members may also be formed either solid or as a hollow body, regardless of the nature of each other voting member either solid.
  • the signal conductor is formed by a ring of a ring antenna.
  • the resonator of the at least one tuning element in this embodiment is preferably arranged in an antenna base of the aforementioned ring antenna.
  • the signal conductor, starting from which the first tuning member projects into the resonator body of the at least one tuning element is an antenna feed line.
  • a specific embodiment of the invention is given by the fact that the projecting into the second cavity of the resonator second tuning of the at least one tuning element is formed by the folded in the corresponding section signal conductor itself.
  • the signal conductor is in this case folded so that it protrudes in a short section of defined length of its course in the cavity of the resonator, the signal conductor due to the repeated folding first led into the cavity, then out of this again and finally in its original Extent direction is continued.
  • this is also technically manageable RF.
  • the blocking filter arrangement has a plurality of tuning elements.
  • each of these tuning elements consists in each case of a resonator, of a resonator arranged in the resonator chamber, each having a first and a second cavity and each of a first first in the first cavity of the resonator protruding first tuning member and a protruding into the second cavity second tuning member.
  • the respective second tuning elements of the individual tuning elements protrude starting from the same signal conductor, spaced from one another with respect to their longitudinal extent, into the respective second cavity of one of the individual resonance bodies of the tuning element.
  • the tuning elements cascaded to a certain extent along the signal conductor can be designed in such a way that the high-frequency signal carried in the signal conductor is blocked with respect to the entire frequency range (s) specified for a radio transmission technology. The latter will be explained below again in connection with an embodiment.
  • the Fig. 1 shows a schematic representation for explaining the basic principle of the notch filter assembly according to the invention.
  • the basic principle of the notch filter arrangement with respect to an example designed as a strip conductor antenna feed line (signal conductor 1) is shown schematically.
  • Basic elements of the arrangement are therefore the aforementioned signal conductor 1 itself and brought into interaction with this tuning element.
  • the tuning element is controlled by a resonator 2; 3; 4 and by the introduced into the resonator 3 in the manner according to the invention tuning members 5; 6 formed.
  • the resonator 2; 3; 4 consists of a metallic, electrically grounded to resonator 2 - preferably made of copper - and arranged in the resonator 3 surrounded by this Resonatorgepuruse resonator body 4.
  • the resonator 4 in the form of a cylindrical member which may have portions of different diameters is at one of its axial ends is galvanically connected to the resonator housing 2, wherein the resonant body 4 is either formed integrally with the resonator housing 2 or with the said axial end, for example by screwing, attached thereto.
  • the loose end 9 of the resonance body 4 extending from this end 9 cavity 7 extends in the direction of the longitudinal axis in the resonator 4 inside.
  • the resonating body 4 furthermore has-here in a section with a larger diameter-another hollow space 8 which extends into the resonant body in the orthogonal direction to the aforementioned cavity 7.
  • the tuning members 5; 6 protrude the tuning members 5; 6 inside.
  • One of the tuning members 5 protrudes into the cavity 7 that extends in the direction of the longitudinal axis 14 of the resonance body 4, starting from the resonator housing 2 that is electrically grounded. Due to the geometry of this tuning element 5, namely in particular by the length of its intrusion into the cavity 7, as well as the geometry of the cavity 7 itself, the frequency range is determined in which the guided in the signal conductor 1 high-frequency signal by means of this tuning element of the notch filter arrangement by a defined attenuation of the high-frequency signal in the relevant frequency range is blocked.
  • the attenuation of the corresponding frequency range results from the fact that the resonant fundamental frequency of the resonator 2; 3; 4, which is determined by the body's natural frequency of its resonance body 4, is detuned by the projecting into the axially extending cavity 7 tuning member 5 to lower frequencies.
  • the signal conductor 1 and the tuning element interacting with it form a comparatively complex system with respect to high-frequency oscillations acting on the tuning element.
  • the frequency range with respect to which the high-frequency signal carried in the signal conductor 1 is attenuated by its interaction with the tuning element is not exclusive of the interaction of the resonance body 4 determined with the projecting into its first cavity 7 tuning member 5. Rather, it is so that this frequency range - although to a lesser extent - is also influenced by the projecting into the second cavity 8 second tuning member 6.
  • the Fig. 2 shows a slight modification of that in the Fig. 1 to explain the basic principle of the invention illustrated blocking filter arrangement.
  • the opposite to the arrangement according to the Fig. 1 existing difference is given by the slightly different design of the signal conductor 1 and the second tuning element 6.
  • the second arrangement orthogonal to the longitudinal axis 14 of the resonator 4 in the second cavity 8 projecting tuning member 6 is formed by a portion of the signal conductor 1 itself.
  • the signal conductor 1 is folded several times at the appropriate location. In the area of this multiple folding, it forms the second tuning element 6, which in this case is hollow.
  • Fig. 3 shows, however, also only in a highly schematic representation, a possible practical application of the notch filter assembly according to the invention.
  • the details of the tuning element are not shown.
  • the resonator housing 2 is shown as part of the resonator 2; 3; 4 (see Fig. 1 and 2 ), which forms the tuning element together with the tuning elements (tuning element 6) not shown here (tuning element 5) or likewise only hinted at.
  • the resonator housing 2 is in this case arranged below a ring antenna having an antenna terminal 10, wherein this ring of the ring antenna forms the signal conductor 1 in this embodiment of the notch filter arrangement, from which the second tuning element 6 passes through the resonator housing 2 into the resonator 2; 3; 4, more precisely in the second (not shown) cavity 8 of his (not shown here), not shown resonance body 4, protrudes.
  • the resonator 2; 3; 4 with its resonator housing 2 and possibly further resonators 2, which are brought into interaction with the ring of the ring antenna via respective second tuning elements 6; 3; 4 may be arranged in an antenna base, on which the via an antenna connection to an antenna feed line connectable ring antenna is mounted.
  • outgoing from the signal conductor 1 second tuning element 6 by the signal conductor 1 itself namely by the multiple folding of a corresponding portion of the signal conductor 1, especially since antenna elements of modern antennas are sometimes folded anyway.
  • the blocking filter arrangement here consisting of a signal conductor 1 formed at least in sections in the form of a stripline, and a plurality of tuning elements, namely, a plurality of resonators 2 1 brought into interaction with the signal conductor 1 via tuning members 6 1 - 6 n ; 3 1 ; 4 1 - 2 n ; 3 n ; 4 n (only recognizable here with regard to the resonator housing 2 1 - 2 n ), is here designed as a compact unit to be inserted in an antenna feed line.
  • the relevant unit, thus the notch filter arrangement has for this purpose a connection port with an antenna-side coaxial connection 12 and with a terminal-side coaxial connection 13.
  • the blocking filter arrangement shown in the example is an arrangement which serves to block the frequency range defined for the GSM-R train radio for a radio frequency signal passing through the antenna feed line and thus the unit inserted therein with the arrangement according to the invention.
  • the blocking filter arrangement shown in the example is an arrangement which serves to block the frequency range defined for the GSM-R train radio for a radio frequency signal passing through the antenna feed line and thus the unit inserted therein with the arrangement according to the invention.
  • the frequency range for the uplink and through further arranged on the opposite longitudinal side, also within the housing nine tuning elements of the tuning 6 1 - 6n of Frequency range for the downlink blocked.
  • the individual tuning elements for blocking one of the two frequency ranges of the GSM-R are with respect to their resonators 2 1 ; 3 1 ; 4 1 - 2 n ; 3 n ; 4 n and the tuning elements 5 1 - 5 n (not shown) and 6 1 - 6 n projecting into these or their resonator bodies 4 1 - 4 n (not shown) are designed to be relatively sharp due to their cascaded arrangement Lock flanks to the below and above adjacent frequency ranges.
  • This is characterized by that of a side wall 11 (the drawing shows the unit with a side wall open on one side, said opened side wall 11 opposite to the other components of the unit shown discontinued) with the housing closed of the unit in the therein resonators 2 1 ; 3 1 ; 4 1 - 2 n ; 3 n ; 4 n protruding, the respective first tuning members 5 1 - 5 n forming pens and their respective geometry causes.
  • the individual locked frequency subregions are slightly larger than previously indicated, but slightly overlap each other in their respective marginal areas, which are only slightly damped.
  • substantially the attenuation of the respective frequency range determining tuning members 6 1 - 6n are formed in the embodiment shown by screws, which formed in the strip conductor portions of the signal conductor 1 in mutually equidistant intervals the signal conductor 1 in the respective underlying resonator 2 1 ; 3 1 ; 4 1 - 2 n ; 3 n ; 4 n out and countered above the signal conductor 1 by means of a mother.
  • an attenuation of> 50 dB is ultimately achieved for the entire GSM-R frequency range to be blocked, as a result of which the blocking characteristics of the signal conductor at the edge regions are blocked Frequency range relatively sharp and defined edges set.
  • An attenuation of> 50 dB equals a complete blocking.
  • the frequency ranges between 873 MHz and 880 MHz for the GSM-R uplink and between 918 MHz and 925 MHz for the GSM-R downlink are very defined and with steep edges to the adjacent frequency ranges blocked.
  • the blocking is in particular such that the signal conductor for a guided by him high-frequency signal in the adjacent frequency ranges, also immediately adjacent to the respective locked frequency range, namely in particular by other radio transmission techniques, such as LTE, GSM-P (public GSM network) , TETRA radio or WLAN frequency ranges used, has only a very small insertion loss of significantly less than 0.5 dB.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
EP19161013.8A 2018-03-06 2019-03-06 Dispositif filtrant d'arrêt Active EP3537533B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018105153.0A DE102018105153B4 (de) 2018-03-06 2018-03-06 Sperrfilteranordnung

Publications (2)

Publication Number Publication Date
EP3537533A1 true EP3537533A1 (fr) 2019-09-11
EP3537533B1 EP3537533B1 (fr) 2021-04-21

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ID=65724178

Family Applications (1)

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EP19161013.8A Active EP3537533B1 (fr) 2018-03-06 2019-03-06 Dispositif filtrant d'arrêt

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EP (1) EP3537533B1 (fr)
DE (1) DE102018105153B4 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2296227A2 (fr) * 2009-09-10 2011-03-16 Delphi Delco Electronics Europe GmbH Antenne pour la réception de signaux satellite circulaires polarisés
CN202737068U (zh) * 2012-08-26 2013-02-13 陕西微康姆通信技术有限公司 无源腔体点频带阻滤波器
CN205752466U (zh) * 2016-06-26 2016-11-30 南京濠暻通讯科技有限公司 一种适用于不同运营商间干扰消除的带阻滤波器

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62204601A (ja) * 1986-03-04 1987-09-09 Murata Mfg Co Ltd 二重モ−ドフイルタ
GB9005527D0 (en) * 1990-03-12 1990-05-09 Radcliffe Christopher J Waveguide filter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2296227A2 (fr) * 2009-09-10 2011-03-16 Delphi Delco Electronics Europe GmbH Antenne pour la réception de signaux satellite circulaires polarisés
CN202737068U (zh) * 2012-08-26 2013-02-13 陕西微康姆通信技术有限公司 无源腔体点频带阻滤波器
CN205752466U (zh) * 2016-06-26 2016-11-30 南京濠暻通讯科技有限公司 一种适用于不同运营商间干扰消除的带阻滤波器

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Publication number Publication date
EP3537533B1 (fr) 2021-04-21
DE102018105153A1 (de) 2019-09-12
DE102018105153B4 (de) 2022-11-17

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