EP2203953B1 - Einstellbarer filter und verfahren zu seiner verwendung - Google Patents

Einstellbarer filter und verfahren zu seiner verwendung Download PDF

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Publication number
EP2203953B1
EP2203953B1 EP08846190.0A EP08846190A EP2203953B1 EP 2203953 B1 EP2203953 B1 EP 2203953B1 EP 08846190 A EP08846190 A EP 08846190A EP 2203953 B1 EP2203953 B1 EP 2203953B1
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EP
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Prior art keywords
primary
resonating
adjustment
tunable filter
resonator
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EP08846190.0A
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English (en)
French (fr)
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EP2203953A1 (de
Inventor
Philip David Sleigh
Elizabeth Francis Phillips
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Radio Design Ltd
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Radio Design Ltd
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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
    • H01P1/205—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

Definitions

  • This invention relates to a tunable filter and a method of use thereof.
  • the invention relates to communication apparatus incorporating a tunable filter and method of use of said communication apparatus.
  • the microwave region of the electromagnetic spectrum is an essential yet finite resource used by both civilian and military applications such as radar, navigation and wireless communications.
  • Mobile radio communications require careful allocation of the spectrum by the relevant national or international authorities to service providers, who in turn may divide their slots into narrower sub bands for allocation to individual operators.
  • Providers must have sufficient flexibility to re-allocate frequencies rapidly, leading to the requirement for tunable filters.
  • sub band filters are generally smaller, easier and therefore cheaper to manufacture, without the ability to tune them in the field, providers are forced to buy multiple products to cover the entire band and to physically swap filters out of base stations as circumstances and adjacent operators change.
  • Tunable filters allow operators to purchase one product only and align it to the desired operating frequency and bandwidth in the field.
  • filters have comprised a conductive housing defining a plurality of resonant cavities with a resonator located in each cavity.
  • a pre-determined electromagnetic coupling strength between the resonators.
  • Each resonator has a natural resonating frequency and therefore each resonator typically has to be tuned manually due to production build and mechanical part tolerances to achieve a pre-determined frequency for all the resonators.
  • This tuning is typically performed using an adjustment screw located in a lid of the filter housing above each cavity. Additional fine adjustment of the electromagnetic coupling strength may also be required and tuning is typically achieved by an adjustment of a tuning screw located within the conductive housing within or around the area at which the coupling takes place.
  • filters which allow tuning of all the resonators of the filter substantially simultaneously, thereby allowing post deployment tuning and reducing associated time and costs.
  • Typical examples of such prior art filters are disclosed in US5841330 , US 2007/0052495 , and US7180391 .
  • the filters contain a plurality of resonant cavities, each cavity comprising a resonator contained within an outer conductor and a dielectric tuner held by a holder.
  • the holders of all the dielectric tuners in the filter are connected together such that they can be moved simultaneously as a group or individually, allowing the dielectrics to adjust the resonator frequencies substantially equally or individually, allowing each resonator frequency to be adjusted independently of the others.
  • a tunable filter as set out in product claim 1.
  • the tunable filter of the present invention allows either or both of:
  • an adjuster element is introduced into each resonant cavity to influence the frequency of a primary resonator located in said cavity.
  • the primary resonator is fixed and the adjuster element is movable.
  • secondary resonating means are associated with each primary resonating means to influence the frequency of the primary resonating means and the adjustment means are provided to allow adjustment of coupling within each primary and secondary resonator pair and/or the resonant frequency of the secondary resonator.
  • the filter of the present invention therefore has the advantage that the filter is easier to manufacture, it allows complete filter parametric adjustment to be achieved and the filter is less sensitive to adjustments, thereby allowing tuning of the filter to be more consistently reproducible compared to prior art filters.
  • the rate of change of adjustment of the coupling between the primary-secondary resonator pair can be adjusted allowing a greater potential tuning range of the filter characteristics.
  • the secondary resonating means can be located in a cavity of the tunable filter with a primary resonating means or can be located externally of the cavity housing the primary resonating means. In either embodiment the secondary resonating means is located in such a position and manner to allow coupling with the primary resonating means with which it is associated.
  • the filter housing is formed from conductive material. Further preferably the conductive housing has a plurality of cavities defined therein for the location of at least the primary resonating means and preferably the primary-secondary resonating pair.
  • the primary resonating means is arranged so as to resonate close to the desired operating frequency of the filter.
  • Tuning means are typically associated with each primary resonating means to allowing tuning of the primary resonating means to a pre-determined or first frequency on manufacture or initial set up of said filter. Thereafter, tuning of the primary resonating means takes place via the adjustment means in accordance with the present invention.
  • the tuning means are preferably located directly above the primary resonating means in the cavity (i.e. substantially vertically above and within the outer perimeter of the primary resonating means).
  • the secondary resonating means are provided with tuning means for allowing the secondary resonating means to be tuned to a pre-determined frequency or second frequency.
  • the tuning means of the secondary resonating means can be integrally formed therewith or can be located a spaced distance from the secondary resonating means (i.e. the tuning means could be located a spaced distance above the secondary resonating means in one example).
  • the tuning means can be in the form of a rotatable threaded screw and/or the like. Once the pre-determined frequency is achieved, the tuning means can be locked via locking means, such as for example by a locking nut and/or the like. It is not essential that separate locking means are used with the tuning means since the tuning means could be self locking and could be moved manually or automatically (i.e. without direct user actuation) using drive means and/or the like.
  • the secondary resonating means is substantially fixed relative to the housing following set-up of the filter (i.e. once any tuning means, if present, have been locked).
  • the primary resonating means are substantially fixed relative to the housing following set-up of the filter (i.e. once tuning means if present have been locked).
  • the adjustment means are typically movable relative to the primary and/or secondary resonating means.
  • the primary and secondary resonating means are substantially fixed and the adjustment means are movable relative to both said primary and secondary resonating means.
  • the primary resonating means in each of the two of more cavities of the filter are coupled together to form the required filter response.
  • the adjustment means for adjusting the coupling within each primary and secondary resonator pair and/or the resonant frequency of the secondary resonator are arranged such that each resonator pair and/or secondary resonator means are adjusted substantially independently of each other and/or of other resonator pairs and/or secondary resonator means in the filter.
  • the adjustment means for adjusting the coupling within each primary and secondary resonator pair and/or the resonant frequency of the secondary resonator are connected via connection means such that each resonator pair and/or secondary resonator means can be adjusted substantially simultaneously.
  • a first adjustment means in order to achieve adjustment of the centre frequency of the filter, can be used to influence the coupling within the primary-secondary resonator pair.
  • second adjustment means are used in addition to or as an alternative to the first adjustment means to influence the resonating frequency of the secondary resonating means. Both the first and second adjustment means can be controlled remotely without a user having the access the interior of the cavity to make the adjustment.
  • the first adjustment means are capable of adjusting the coupling within the primary-secondary resonating pair
  • the first adjustment means are preferably located laterally of the primary resonating means and between the primary and secondary resonating means.
  • the first adjustment means of two or more primary-secondary resonating pairs in the filter can be connected together via connection means. This allows the coupling within each primary-secondary resonating pair of the two or more primary-secondary resonating pairs to be adjusted substantially simultaneously.
  • the second adjustment means are capable of adjusting the resonating frequency of the secondary resonating means
  • the second adjustment means can be located laterally of the secondary resonating means or, in one embodiment, can be located above or integraly with the secondary resonating means.
  • the second adjustment means of two or more secondary resonating means can be connected together via connection means. This allows the frequency of two or more secondary resonating means to be adjusted substantially simultaneously.
  • connection means can be any suitable connection means.
  • the connection means can include any suitable linkage means, mechanical means and/or the like.
  • the adjustment means can be joined to control means in the form of an elongate rod, any other suitably shaped rod and/or the like.
  • the connection means could be electrical means, such as for example a diode adjuster, connected via a circuit board, suitable electrical circuitry and/or the like. Adjustment of any electrical parameters through the electrical means could result in adjustment of the coupling of the resonator pair and/or the resonating frequency of the secondary resonating means.
  • connection means can be moved in a substantially horizontal plane or in a plane substantially parallel to the lid of the filter.
  • the connection means can be moved from side to side in a direction substantially parallel to the longitudinal axis of the filter.
  • connection means could be slidably movable, pivotably movable and/or rotatable.
  • connection means could be a ring or disc member located with the lid of the filter to which the adjustment means are connected at spaced apart intervals therealong. Rotation of the connection means could cause sliding movement of the adjustment means relative to the primary and/or secondary resonating means.
  • connection means are located underneath the lid of the filter and movable within the cavities of the filter, thereby substantially preventing electrical leakage from the filter.
  • connection means could be located on top of or above the lid or cavity walls of the filter and movable relative thereto if required.
  • Guide means can be associated with the connection means to help guide the connection means during movement of the same and for supporting the same.
  • the guide means could include one or more guide channels defined in the housing of the filter.
  • adjustment of the adjustment means can be undertaken manually.
  • adjustment of the adjustment means can be undertaken automatically using suitable drive means.
  • the drive means can include any or any combination electrical, pneumatic, mechanical, hydraulic means and/or the like and can be connected to the adjustment means directly or the connection means.
  • one or more electrically powered motors can be used to drive the adjustment means and/or connection means.
  • Control means can be associated with the adjustment means and/or connection means to allow control of the adjustment. Control of the adjustment means can be undertaken remotely.
  • the adjustment means includes one or more adjustment elements.
  • the adjustment means can be formed at least in part from dielectric material or from conductive material. In the case of di-electric material, the adjustment means can engage or abut with the primary and/or secondary resonating means. In the case of conductive material, the adjustment means are typically a spaced distance apart from the primary and/or secondary resonating means.
  • the adjustment means can be located internally or externally of the cavity and preferably in either embodiment movement of the adjustment means relative to the primary and/or secondary resonating means influences the coupling within the primary-secondary pair and/or resonating frequency of the secondary resonating means.
  • the adjustment means are preferably capable of undergoing rotatable, pivotable and/or slideable movement during the adjustment process.
  • Each associated primary and secondary resonating means are typically located a spaced distance apart and laterally from each other.
  • the primary and secondary resonating means can be located at any suitable position within a cavity of the filter providing the secondary resonating means can influence the primary resonating means in use.
  • the secondary resonating means of a primary-secondary resonating pair can be located in a separate cavity to the primary resonating means with which it is associated or coupled.
  • the primary resonating means is preferably located on a base, side wall and /or on a lid of the defined cavity. It can take the form of a solid post, hollow cylindrical post and/or the like.
  • the secondary resonating means can be located on a base, side wall and/or on a lid associated with the cavity and also take the form of a solid post, hollow cylindrical post and/or the like. In either case the primary and secondary resonating means are of such a form, size, shape and/or material to allow them to resonate at a desired resonating frequency.
  • first adjustment means can be provided to adjust the coupling between the primary-secondary resonating pair and at least second adjustment means can be provided to adjust the resonating frequency of the secondary resonating means.
  • the difference between the first and second frequencies of the between the primary and secondary resonating means is less than or substantially equal to three times the resonating frequency of the primary resonating means.
  • coupling refers to any arrangement whereby the electromagnetic fields of two or more parts of the filter, the primary resonating means, the secondary resonating means and/or the adjustment means are electromagnetically connected together or influence each other (i.e. the parts or means are mutually affected by the same electromagnetic field).
  • the primary and/or secondary resonating means can take any suitable size, shape and/or form in which they can resonate at one or more desired frequencies and can be coupled to each other.
  • the primary and/or secondary resonating means are in the form of a conductive post like element protruding inwardly into a cavity defined by one or more surfaces of the filter housing.
  • the present invention has the advantages over the prior art in that complete filter parametric adjustment can be achieved, the bandwidth of the filter can be increased or reduced, a greater overall tunable frequency range can be achieved and a simpler mechanical implementation can be utilised.
  • the filter includes a conductive housing defining a plurality of cavities therein. Each cavity has a primary resonator (R) located therein. An adjuster (not shown) is provided in each cavity to allow adjustment of the frequency of each primary resonator. Adjustment of the adjuster has the effect of changing the loading capacitance (Cap) to the resonator R.
  • the adjusters of least two resonators (R1, R2; R(n-1), R(n)) are connected together so that the frequency of each resonator R1, R2; R(n-1), R(n) can be adjusted substantially simultaneously. This results in the loading capacitance (Cap1, Cap2; Cap(n-1), Cap(n)) of each resonator being adjusted substantially simultaneously by equal amounts.
  • FIG. 2 there is illustrated a simplified circuit diagram of a tunable filter according to an embodiment of the present invention.
  • the filter includes a conductive housing defining a plurality of cavities therein. Each cavity contains a Primary Resonator (PR) and a Secondary Resonator (AR) electromagnetically coupled (CA) to the PR, to form a primary-Secondary resonator pair. Adjustment means (not shown) are associated with each cavity to allow adjustment of the coupling between said primary-secondary resonator pairs. Adjustment of the adjustment means has the effect of changing the resonant frequency of the resonator PR.
  • the adjusters of least two primary resonators PR1, PR2; PR(n-1), PR(n) are connected together so that the frequency of each primary resonator PR can be adjusted substantially simultaneously thus changing the frequency of the filter parameters.
  • the adjustment means can be arranged so as to adjust the frequency of the secondary resonator and/or the coupling between each Primary-Secondary pair, thereby changing the centre frequency of the filter, and/or bandwidth of the filter.
  • FIGS. 3a and 3b show cross sectional views of a top and side of one section of a tunable filter according to an embodiment of the present invention. More particularly, the section is defined in a housing 4 having a base 6, side walls 8 and a lid 10.
  • the housing is formed from conductive material, such as for example metal.
  • a cavity 2 is defined between the base, side walls and a lid. The cavity is typically one of a plurality of cavities defined in the housing of the filter but only one cavity is shown in these figures for the purposes of clarity.
  • a primary resonator 12 in the form of a conductive post is located on base 6 of the cavity 2 and protrudes upwardly into the cavity.
  • Tuning means in the form of a frequency adjustment screw 14 is inserted through lid 10 to allow tuning of the primary resonator 12 during manufacture of the filter.
  • Screw 14 is in the form of a threaded screw having locking means in the form of a locking nut 16 located thereon.
  • a secondary resonator 18 in the form of a conductive post is located on base 6 of the cavity 2 and also protrudes upwardly into the cavity.
  • the size, material and/or position of the secondary resonator 18 is such so as to allow electromagnetic coupling with the primary resonator 12 to form a primary-secondary resonator pair.
  • Adjustment means in the form of an adjuster element 20 is pivotally mounted in cavity 2 and is located between the primary resonator 12 and the secondary resonator 18.
  • the purpose of the adjuster element is to adjust the electromagnetic coupling between the primary and secondary resonators 12, 18 (i.e. adjust the coupling within the primary-secondary resonator pair).
  • the adjuster element can be formed from di-electric material or conductive material as required.
  • element 20 is pivotable about a substantially horizontal axis. However, it will be appreciated that the adjuster element can be moved through any suitable angle and/or about any suitable axis providing that suitable adjustment of the coupling between the primary-secondary resonator pair is achieved.
  • Pivotal movement of adjuster element 20, as shown by arrow 22, influences the electromagnetic field within the primary-secondary resonator pair. This causes a change in the centre operating frequency of the primary resonator 12. This in turn changes the loading of the primary resonator thus changing the resonating frequency associated with therewith.
  • the secondary resonator 18 can be located in any suitable position within or externally to cavity 2 providing it is coupled to primary resonator 12.
  • figures 4a and 4b illustrates a similar filter to that of figures 3a and 3b but secondary resonator 18 is attached to lid 10 in this embodiment.
  • tuning means in the form of a screw thread 24 is associated with an external end of secondary resonator 18 to allow the frequency of secondary resonator 18 to be tuned during manufacture of the filter.
  • Locking means in the form of a locking nut 26 can be provided on screw thread 24 to lock the same once initial tuning has taken place.
  • the opposite end of resonator 18 protrudes into cavity 2 and projects downwardly into the cavity (i.e. protrudes in an opposite direction to primary resonator 12).
  • the tuning means could also be used as second adjustment means for adjustment of the resonating frequency of the secondary resonator 18 even after initial set up of the filter.
  • a self locking screw 24 could be used which is integral with the secondary resonator 18 to allow movement of the secondary resonator after initial set up of the filter has been completed.
  • adjuster element 20 is slidably mounted in the cavity 2 for sliding movement between the primary resonator 12 and secondary resonator 18, as shown by arrow 28. Sliding movement of adjuster element 20 acts in a similar manner to the adjuster element in figures 3a and 3b to influence the coupling within the primary-secondary resonator pair, thereby changing the frequency of the primary resonator.
  • a filter typically includes a plurality of cavities defined therein and each cavity typically contains a primary-secondary resonator pair and an adjustment element, as shown in figures 5a-6c . More particularly, figures 5a-5c illustrate a filter housing 100 having five sections or cavities 102 defined therein. Each cavity communicates with an adjacent cavity via an iris or aperture. 103.
  • the filter housing 100 has a base 106, side walls 108 and a lid 110.
  • a primary resonator 112 is located in each cavity 102 and has tuning means in the form of an adjustment screw 114 located in lid 110 and associated with each resonator 112. This allows each of the plurality of primary resonators to be individually and independently tuned during manufacture of the filter.
  • a locking nut 116 is provided to lock the adjustment screw in place once it has been correctly positioned.
  • Transformers 109 are used to electromagnetically couple the signal to/from the input/output connectors 111 to the cavities.
  • a secondary resonator 118 is attached to lid 110 and protrudes inwardly of the cavity in a direction towards base 106.
  • a screw thread 124 is associated with an external lid end of resonator 118 to allow tuning of the secondary resonator 118 on manufacture and a locking nut 126 is provided to lock screw 124 following tuning, as previously described in figures 4a-4b .
  • An adjuster element 120 is located in each cavity 102 and the adjuster elements 120 of all five cavities are connected together via connection means in the form of a common control rod 128.
  • Control rod 128 is slidably mounted within housing 100 to allow all five adjuster elements 120 to be slidably moved substantially simultaneously on actuation of the control rod. More particularly, control rod 128 is slidably mounted in a plurality of guide channels defined in an upper edge of the side walls of the housing.
  • Figures 5a-5c illustrate a first position of the adjuster elements 120 and figures 6a-6c illustrate a second position of the adjuster elements 120 following actuation of control rod 128 in use.
  • Actuation of the control 128 can be performed manually or can be performed automatically using for exampled one or more powered motors. In either case actuation of control 128 can be performed directly or remotely.
  • Figure 7 illustrates how the frequency of the filter in figures 5a-6c can be adjusted on moving the adjuster elements 20 from the first to the second position.
  • Lines 'A' and 'B' show the lowest and highest operating frequencies of the filter following bandwidth adjustment.
  • the centre operating frequency of the filter can be adjusted using the described invention.
  • FIGS. 8a-8b there is illustrated a further embodiment of the present invention in which the range of the bandwidth of the filter can be increased or decreased.
  • This embodiment can be used and/or can be provided independently of the embodiments previously described or can be used and/or can be provided in combination with the previously described figures.
  • a single cavity of a multiple cavity tuner is illustrated in figures 8a-8b . Similar reference numbers have been used to denote similar features in figures 4a and 4b .
  • a second conductive or dielectric adjuster element 200 is provided between the side wall 8 of the filter housing and the secondary resonator 18. Provision of the second adjuster element 200 in the cavity allows the resonant frequency of the secondary resonator 18 to be adjusted independently of the primary resonator 12 by a sliding movement as indicated by the arrow 222.
  • a filter typically includes a plurality of cavities defined therein and each cavity typically contains a primary-secondary resonator pair and an adjustment element.
  • Figure 9a , 9b and 9c show a similar filter to the one in figure 5a , 5b and 5c with an additional second tunable element 131 enabling the tuning adjustment of the resonant frequency of the secondary resonator 130.
  • Control rod 128 is slidably mounted within housing 100 to allow all five additional adjuster elements 131 to be slidably moved substantially simultaneously on actuation of the control rod. More particularly, control rod 128 is slidably mounted in a plurality of guide channels defined in an upper edge of the side walls of the housing.
  • Figures 9a-9c illustrate a first position of the adjuster elements 131 and figures 10a-10c illustrate a second position of the adjuster elements 131 following actuation of control rod 128 in use. This allows the frequency of all the secondary resonators 130 to be adjusted by a substantially equal amount substantially simultaneously, thereby creating an accurate and substantially reproducible tuning method for the filter bandwidth and frequency.

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Claims (15)

  1. Durchstimmbares Filter, wobei das genannte durchstimmbare Filter ein Gehäuse (4; 100) mit zwei oder mehr darin definierten Hohlräumen (2; 102) beinhaltet, wobei sich in jedem der genannten Hohlräume ein primäres Resonanzmittel (12; 112) befindet und jedes primäre Resonanzmittel mit einer ersten Frequenz resoniert, wobei die primären Resonanzmittel in jedem der zwei oder mehr Hohlräume des Filters zum Bilden eines erforderlichen Filterfrequenzgangs miteinander gekoppelt sind, dadurch gekennzeichnet, dass das genannte durchstimmbare Filter des Weiteren damit assoziierte sekundäre Resonanzmittel (18; 118) beinhaltet, die mit einer zweiten, von der ersten Frequenz der genannten primären Resonanzmittel verschiedenen Frequenz resonieren, wobei die genannten sekundären Resonanzmittel so angeordnet sind, dass jedes sekundäre Resonanzmittel mit seinem zugeordneten primären Resonanzmittel gekoppelt ist, um ein Primär/Sekundär-Resonatorpaar zu bilden, und wobei das durchstimmbare Filter Einstellmittel (20; 120) zum Einstellen der Kopplung in jedem Primär- und Sekundär-Resonatorpaar und/oder der Resonanzfrequenz der sekundären Resonanzmittel beinhaltet.
  2. Durchstimmbares Filter nach Anspruch 1, wobei das sekundäre Resonanzmittel (18; 118) sich innerhalb des Filtergehäuses (4; 100) bei dem primären Resonanzmittel (12; 112) befindet.
  3. Durchstimmbares Filter nach Anspruch 1, wobei das sekundäre Resonanzmittel (18; 118) sich in dem Hohlraum des primären Resonanzmittels (12; 112) befindet, um das Primär/Sekundär-Resonatorpaar zu bilden.
  4. Durchstimmbares Filter nach Anspruch 1, wobei das sekundäre Resonanzmittel (18; 118) sich außerhalb des Filtergehäuses (4; 100) oder Hohlraums befindet, in dem sich das primäre Resonanzmittel (12; 112) befindet.
  5. Durchstimmbares Filter nach Anspruch 1, wobei die Einstellmittel (20; 120) zum Einstellen von zwei oder mehr Primär/Sekundär-Resonanzpaaren in dem Filter über Verbindungsmittel miteinander verbunden sind, so dass die Kopplung in jedem Primär/Sekundär-Resonanzpaar der zwei oder mehr Primär/Sekundär-Resonanzpaare im Wesentlichen gleichzeitig eingestellt werden kann.
  6. Durchstimmbares Filter nach Anspruch 1, wobei die Einstellmittel (20; 120) zum Einstellen von zwei oder mehr sekundären Resonanzmitteln (18; 118) über Verbindungsmittel miteinander verbunden sind, so dass die Resonanzfrequenz jedes sekundären Resonanzmittels im Wesentlichen gleichzeitig eingestellt werden kann.
  7. Durchstimmbares Filter nach Anspruch 1, wobei die Einstellmittel (20; 120) zum Einstellen der Kopplung in jedem Primär- und Sekundär-Resonatorpaar und/oder der Resonanzfrequenz der sekundären Resonanzmittel (18; 188) so angeordnet sind, dass jedes Resonatorpaar und/oder jeder sekundäre Resonator im Wesentlichen unabhängig von jedem anderen Resonatorpaar und/oder sekundären Resonanzmittel in dem genannten Filter eingestellt werden kann.
  8. Durchstimmbares Filter nach Anspruch 1, wobei die Einstellmittel (20; 120) von Hand eingestellt werden.
  9. Durchstimmbares Filter nach Anspruch 5, wobei die Einstellmittel (20; 120) von einem elektrischen, pneumatischen und/oder mechanischen Mittel oder einer Kombination davon angetrieben werden.
  10. Durchstimmbares Filter nach Anspruch 1, wobei das Einstellmittel (20; 120) ein oder mehrere Einstellelemente beinhaltet, die zumindest teilweise aus leitfähigem Material hergestellt sind.
  11. Durchstimmbares Filter nach Anspruch 1, wobei das Einstellmittel (20; 120) ein oder mehr Einstellelemente beinhaltet, die zumindest teilweise aus dielektrischem Material hergestellt sind.
  12. Durchstimmbares Filter nach Anspruch 1, wobei die Einstellmittel (20; 120) und/oder die Verbindungsmittel zum Verbinden einer Anzahl von Einstellmitteln miteinander während des Einstellverfahrens eine Dreh-, Schwenk- und/oder Schiebebewegung durchlaufen können.
  13. Durchstimmbares Filter nach Anspruch 11, wobei das eine oder die mehreren Einstellmittel mit dem primären und/oder sekundären Resonatormittel eines Primär/Sekundär-Resonanzpaares (18; 118) in Eingriff sind.
  14. Durchstimmbares Filter nach Anspruch 10, wobei das eine oder die mehreren Einstellelemente um einen Abstand von dem primären (12; 112) und/oder sekundären Resonanzmittel (18; 118) eines Primär/Sekundär-Resonanzpaares beabstandet sind.
  15. Verfahren zum Einstellen der Betriebsfrequenz und/oder Bandbreite eines durchstimmbaren Filters, wobei das genannte durchstimmbare Filter ein Gehäuse (4; 100) mit zwei oder mehr darin definierten Hohlräumen (2; 102) beinhaltet, wobei sich in jedem der genannten Hohlräume ein primäres Resonanzmittel (12; 112) befindet und jedes primäre Resonanzmittel mit einer ersten Frequenz resoniert, wobei die primären Resonanzmittel in jedem der zwei oder mehr Hohlräume des Filters zum Bilden eines erforderlichen Filterfrequenzgangs miteinander gekoppelt sind, dadurch gekennzeichnet, dass das genannte durchstimmbare Filter des Weiteren damit assoziierte sekundäre Resonanzmittel (18; 118) beinhaltet, die mit einer zweiten, von der ersten Frequenz der genannten primären Resonanzmittel verschiedenen Frequenz resonieren, wobei die genannten sekundären Resonanzmittel so angeordnet sind, dass jedes sekundäre Resonanzmittel mit seinem zugeordneten primären Resonanzmittel gekoppelt ist, um ein Primär/Sekundär-Resonatorpaar zu bilden, und wobei das genannte Verfahren den Schritt des Einstellens der Kopplung in jedem Primär- und Sekundär-Resonatorpaar und/oder der Resonanzfrequenz der sekundären Resonanzmittel beinhaltet.
EP08846190.0A 2007-10-30 2008-10-27 Einstellbarer filter und verfahren zu seiner verwendung Active EP2203953B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0721361A GB0721361D0 (en) 2007-10-30 2007-10-30 Tunable filter
PCT/GB2008/003645 WO2009056813A1 (en) 2007-10-30 2008-10-27 Tunable filter and method of use thereof

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EP2203953A1 EP2203953A1 (de) 2010-07-07
EP2203953B1 true EP2203953B1 (de) 2015-08-05

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EP08846190.0A Active EP2203953B1 (de) 2007-10-30 2008-10-27 Einstellbarer filter und verfahren zu seiner verwendung

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EP (1) EP2203953B1 (de)
GB (1) GB0721361D0 (de)
WO (1) WO2009056813A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201203833D0 (en) * 2012-03-05 2012-04-18 Filtronic Wireless Ltd A tuneable filter
CN102683773B (zh) * 2012-04-28 2014-07-09 华为技术有限公司 一种可调滤波器及包括该滤波器的双工器
EP2814111B1 (de) * 2013-06-13 2020-03-18 Alcatel Lucent Resonatoranordnung
EP2814112A1 (de) * 2013-06-13 2014-12-17 Alcatel Lucent Resonatoranordnung
DE102013020428A1 (de) 2013-12-05 2015-06-11 Kathrein-Werke Kg Hochfrequenzfilter in koaxialer Bauweise
EP2894710B1 (de) * 2014-01-10 2019-05-08 Alcatel Lucent Filter mit koaxialen Resonatoren
US9979063B2 (en) * 2016-02-12 2018-05-22 Huawei Technologies Cananda Co., Ltd. Rod-switched tunable filter

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5535560A (en) * 1978-09-04 1980-03-12 Matsushita Electric Ind Co Ltd Coaxial type filter
DE3906286A1 (de) * 1989-02-28 1990-08-30 Siemens Ag Keramik-mikrowellenfilter mit apertur-gekoppelten keramischen resonatoren mit versteilerter resonanzkurve
GB2247125B (en) * 1990-08-16 1995-01-11 Technophone Ltd Tunable bandpass filter
US5841330A (en) * 1995-03-23 1998-11-24 Bartley Machines & Manufacturing Series coupled filters where the first filter is a dielectric resonator filter with cross-coupling
US6924718B2 (en) * 2002-12-04 2005-08-02 Rs Microwave Company Coupling probe having an adjustable tuning conductor
FI119207B (fi) * 2003-03-18 2008-08-29 Filtronic Comtek Oy Koaksiaaliresonaattorisuodatin
FI20041546A (fi) * 2004-11-30 2006-05-31 Filtronic Comtek Oy Lämpötilakompensoitu resonaattori

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GB0721361D0 (en) 2007-12-12
EP2203953A1 (de) 2010-07-07
WO2009056813A9 (en) 2009-10-08
WO2009056813A1 (en) 2009-05-07

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