EP3105814A1 - Hochfrequenzfilter in koaxialer bauweise - Google Patents
Hochfrequenzfilter in koaxialer bauweiseInfo
- Publication number
- EP3105814A1 EP3105814A1 EP15703873.8A EP15703873A EP3105814A1 EP 3105814 A1 EP3105814 A1 EP 3105814A1 EP 15703873 A EP15703873 A EP 15703873A EP 3105814 A1 EP3105814 A1 EP 3105814A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inner conductor
- frequency filter
- filter according
- conductor
- housing
- 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
Links
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Classifications
-
- 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
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
-
- 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
-
- 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
- H01P1/207—Hollow waveguide filters
- H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
- H01P1/2084—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with dielectric resonators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/10—Dielectric resonators
Definitions
- the invention relates to a high-frequency filter in coaxial design, in particular in the manner of a high frequency soft (such as duplexer) or a bandpass filter or band-stop filter.
- a common antenna is often used for transmit and receive signals.
- the transmit and receive signals each use different frequency ranges, and the antenna must be suitable for transmitting and receiving in both frequency ranges.
- a suitable frequency filtering is required, with the one hand, the transmission signals from the transmitter to the antenna and on the other hand, the received signals are forwarded from the antenna to the receiver.
- high frequency filters in coaxial design are used today.
- a pair of high frequency filters may be used, both of which pass a particular frequency band (bandpass filter).
- a pair of high frequency filters may be used, both of which block a particular frequency band (bandstop filter).
- a pair of high-frequency filters may be used, of which one filter passes frequencies below a frequency between transmit and receive band and blocks frequencies above this frequency (low-pass filter), and the other filter blocks frequencies below a frequency between transmit and receive band and pass through higher frequencies (high-pass filter).
- High frequency filters are often manufactured in the form of coaxial TEM resonators. These resonators can be manufactured inexpensively and economically from milling or casting parts and they ensure a high electrical quality and a relatively high temperature stability.
- a coaxial single resonator in milling or casting technique consists for example of a cylindrical inner conductor and a cylindrical outer conductor. It is also possible that the inner conductor and / or the outer conductor has a regular n-polygonal cross-section in cross-section transversely to the inner conductor.
- the inner and outer conductors are at one end (usually on the bottom or bottom side) over a large area connected by an electrically conductive layer (usually short-circuited by an electrically conductive bottom). Between the inner and the outer conductor is usually air as a dielectric.
- the mechanical length of such a resonator corresponds to one fourth of the electrical wavelength.
- the resonant frequency of the coaxial resonator is determined by its mechanical length. The longer the inner conductor, the larger the wavelength and the lower the resonance frequency.
- the electrical coupling between the resonators is the weaker the farther the inner conductors of two resonators are from each other and the smaller the coupling opening of the diaphragm between the inner conductors.
- EP 1 169 747 B1 for example, in order to improve the frequency tuning, it is proposed that the inner conductor of the resonator is designed as a hollow cylinder and an axially adjustable tuning element, which consists of a dielectric material, is provided in the inner conductor.
- EP 1 596 463 A1 proposes to form adjustable ceramic tuning elements in the inner conductor formed as a hollow cylinder, which, however, co-projects with its front end protruding above the inner conductor and with an area that dips far into the hollow cylindrical inner conductor a sleeve or pot-like AbstimmSystem is covered, which consists of metal.
- a coaxial resonator is intended to have a dielectric layer in a cutout provided there for the purpose of increasing its dielectric strength at a low volume on the inside of the lid.
- a hollow-cylindrical inner conductor is again proposed in a coaxial resonator, on the upper annular end face of which a hollow-cylindrical ring with the same dimensions as the hollow-cylindrical inner conductor is placed, wherein the attached hollow-cylindrical ring made of ceramic with a high Dielectric constant is.
- This ceramic ring with high dielectric constant and low dielectric losses should also be used without gaps between the open inner conductor end of the coaxial resonator and the underside of the lid. This should be feasible at the same resonant frequency smaller sizes.
- the harmonics capable of propagating in the resonators should shift to higher frequencies.
- both the outer conductor and the cylindrical inner conductor each consist of a dielectric as carrier material.
- a conductive layer is provided to form the inner conductor as well as to form the outer conductor.
- the coaxial resonator is formed.
- the dielectric of the outer conductor has an axial bore into which the inner conductor, which is applied to the inner dielectric, is formed, forming a radial spacer gap.
- US 4,268,809 which describes a filter using a plurality of coaxial resonators. According to this prior publication, a dielectric layer is proposed which covers all free front ends of the inner conductors together.
- a conductive structure is then formed opposite the inner conductors, which is mechanically and galvanically connected to the inner conductor by means of electrically conductive screws which pass through the dielectric layer.
- the conductive structures formed on the dielectric layer each terminate at a distance from each other, whereby a capacitive coupling is effected.
- the maximum possible power handling capacity is often to be considered as one of the limiting factors for reducing the size of the filter assemblies.
- the power handling capacity is essentially determined by the distance between the open inner conductor end and the usually grounded cover and / or the side walls, the tuning elements, etc.
- the complete or partial encapsulation or encasing of the open inner conductor ends with a dielectric material whose dielectric constant is greater than 1.2 and in particular greater than 2 is proposed in the context of the invention, the minimum distances between the cover, the walls and the tuning elements are reduced, since the power handling significantly increased.
- the enclosing can be done with the help of one or more attached moldings. It has also proved to be favorable to encase the inner conductor or the essential parts of the inner conductor completely or partially with corresponding plastic material which has the desired or suitable dielectric values.
- the maximum power handling capability can be controlled via the thickness of the dielectric layer. ever the thicker the layer, the higher the performance is possible without causing a rollover. Thinner layers mean lower dielectric losses and thus lower transmission loss for the filter.
- the maximum power handling can of course also be influenced by the choice of the dielectric material and its specific properties.
- One of the main advantages of the invention is therefore based on the fact that the volume of the resonator chamber, ie the size of the filter assemblies, can be reduced, which leads to an overall lower construction cost. Nevertheless, within the scope of the invention, a higher power handling capacity of the filters can be achieved, and this with an overall simple manufacturing process. Because in particular the patched or overmolded inner conductor form an independent part. The full-surface or partial coating or the full-surface or partial casing formed there with the corresponding dielectric material, at least in the area of the free inner conductor end, can be realized for all imaginable inner conductor shapes.
- the internal conductors used in the present resonators in the invention can consist of both metal and dielectric, for example of ceramic.
- the encapsulation in one or more or all internal conductors of a corresponding high-frequency filter can be performed.
- the HC in particular in the form of contact or Umgie 7s both in home-molded inner conductors or even insertable inner conductors perform that are screwed, for example screwed into the resonator, screwed, pressed or otherwise mechanically attached and galvanically connected. This also leads to an easy handling, since the over-molded with the corresponding sheath material inner conductor forms an independent component.
- plastic molded parts can also be manufactured separately and then placed on the inner conductor.
- the molded parts can be provided with corresponding holders and locking devices, which are of a finger-like design and are supported, for example, in the radial direction or predominantly in the radial direction on the inner wall of the housing or the walls and / or with one or more finger-like spacers on the inner wall Bottom of the lid are attached.
- the enclosing of the inner conductor ends com Plett or only partially in selected areas is possible;
- the encircling of the inner conductor ends by the dielectric material can be done by molding or molding, encapsulating or painting with suitable plastics and / or by placing special molded plastic parts (for example by using clips);
- the plastic moldings can be one or more parts;
- the plastic molded parts can be fixed to the inner conductor or via integrally formed supports on the cover or on side walls or by the specific design of the inner conductor with undercuts, which are held behind the plastic moldings undercut;
- the enclosing of the inner conductor or the inner conductor ends can be carried out with insertable inner conductors or with inner conductors which are already integrated or molded in the housing (for example by casting or encapsulation);
- the insertable inner conductors can be made of metal or dielectric (eg ceramic); the enclosing may be performed on one, several or all of the internal conductors of a
- Figure 1 an axial section through a coaxial resonator as a basic structure for a high-frequency filter
- Figure 2 a cross-sectional view along the line
- FIG. 3 shows an embodiment modified from FIG. 1 in an axial section of a coaxial resonator with an A tuning element provided in the housing cover;
- FIG. 4 an embodiment modified from FIG. 3;
- FIG. 5a shows an axial sectional view through an inner conductor according to the invention in a three-dimensional representation
- FIG. 5b shows an axial section through an inner conductor which is slightly modified with respect to FIG. 5a;
- the coaxial filter comprises an outer conductor housing 1 with an outer conductor 1 1 , a concentric and coaxial thereto in the embodiment shown inner conductor 3 and a bottom or housing bottom 5, in which the electrically conductive outer conductor 1 and the electrically conductive inner conductor. 3 are galvanically connected to each other.
- the resonator shown with reference to Figures 1 and 2 has a square cross section, wherein the outer conductor housing 1 comprises a cover or housing cover 7, with which the resonator interior 19 is closed.
- the cover 7, like the entire outer conductor housing, consists of an electrically conductive material, generally metal, for example aluminum, etc. (as well as the outer conductor 1 'or the housing bottom 5), at least on the inner side 7a an electrically conductive layer coated (if, for example, the housing consists of a plastic).
- the inner conductor 3 shown in the drawings can be integral with the outer conductor housing 1, i. in particular connected to the bottom 5 or attached and attached there as a separate component and be galvanically connected to the ground. This can be done for example by using appropriate screws, which can be screwed, for example via a hole in the housing bottom in an internal thread in the inner conductor 3 or screwed using a mother sitting there.
- FIG. 3 merely shows that a corresponding adjustment of the resonant frequency can be achieved by adjusting a setting or tuning element 9, for example housed in the housing cover 7 in a rotatable manner can be rotated to the inner conductor 3 to or away from this.
- this adjusting element 9 is seated in a threaded bushing 17, which is galvanically connected thereto, while the lid 7 axially and concentrically passes through the inner conductor 3 or directly in a threaded hole in the lid itself.
- the aforementioned, on the lid 7 different in the resonator 19 and on releasable adjustment element 9 can be configured by its diameter and diameter shape so that it 3c in a corresponding and ending at the end face 3a axial bore in the Inner conductor 3 can intervene.
- the mentioned adjusting elements 9 may consist of metal or for example of a dielectric. To this extent, reference is also made to known solutions.
- the inner conductor is also hollow, i.
- the inner conductor may be formed as a hollow cylindrical inner conductor, for example, in the bottom region, an actuating element 109 may be provided, which consists in the embodiment shown of a threaded plate or threaded pot.
- This threaded plate or threaded pot has an outer thread on its outer circumference, which engages with a corresponding internal thread on the inner side 3b of the inner conductor 3c provided with an inner bore 3c.
- the mentioned inner conductor 3 may be integrally connected, optionally cohesively and thus galvanically connected to the housing bottom of the outer conductor walls.
- a resonator can be produced, for example, by milling from a metal block, wherein it has already been noted that the inner conductor 3 is connected, for example, subsequently to the ground mechanically and galvanically, for example by using screws.
- FIG. 5a a first or second embodiment of a resonator according to the invention with a correspondingly adapted inner conductor according to the invention is shown in axial axial section and in FIG. 5b in axial section.
- the inner conductor 3 has an inner conductor end face 3a which extends in the radial direction beyond the other outer diameter of the inner conductor 3, to form a disk-shaped inner conductor, which is not absolutely necessary in the context of the invention.
- Extension region 33 This inner conductor extension region 33 has an outer diameter 3e which usually corresponds to 1.01 to 4 times the other outer diameter 3d of the inner conductor 3, for example 1.75 to 2.25 times.
- the thickness 35 of this inner conductor extension region 33 can also be chosen differently.
- It can, for example, move between 0.5 mm to 6 mm, for example be greater than 1 mm, 1.5 mm, 2 mm or 2.5 mm. It can also be smaller than 5.5 mm, 5 mm, 4.5 mm, 4 mm or 3.5 mm. Values around 3 mm are often suitable.
- the end face 3a thus formed with the associated end face region 3'a can be completely or partially coated with a suitable dielectric material in a partial height, preferably starting from the end face 3a in the direction of the bottom 5.
- a corresponding cladding material 21 is provided here, which is provided, arranged, placed, encapsulated or injection-molded on the surface 23 of the inner conductor 3, for example at the points formed in FIG. 5a or FIG. 5b, generally the cladding material 21 the inner conductor 3, for example, completely or partially encased in the points shown in the drawings.
- the cladding material 21 may rest directly on the surface 23 of the inner conductor 3, for example at the points shown (but also at other locations), but optionally also indirectly with the formation of intermediate layers, e.g. Air, between the surface 23 and the adjacent layer of the sheath material 21st
- this sheathing material 21 is in this case Embodiment, inter alia, on the end face 3a of the disc-shaped extension region 33, also in the inner or axial bore 3c on the formed there inner wall 3f (which is part of the entire surface 23 of the inner conductor 3) in an axial height 36, on the outer circumference 3g of the disc-shaped Extension region 33 and in part on the bottom 3h of this extension region 33 is formed.
- this sheathing material 21 or this layered sheath material 21 may be applied to the corresponding inner conductor at the described points, so that at the points where the sheath stops, a layer thickness corresponding paragraph 25 is formed, such as on the underside 3h of the disk-shaped enlargement region 33.
- the embodiment according to FIG. 5a also shows that where the cladding material 21 is provided, the material of the inner conductor 3 can be worked out accordingly.
- a corresponding material recess 3i is provided, for example, in the region of the inner axial bore 3c of the inner conductor 3, and here corresponding to the inner axial height 36.
- the inner bore 3c, i. the surface (inner wall) 3f of the inner conductor bore 3c can pass from the material of the inner conductor to the sheath material 21 in the region of the inner axial height 36 in a step-free manner, as can be seen from FIG. 5a.
- FIG. 5b it is shown in deviation that the material recess 3i (forming a first bore) Section 3.1 with a larger bore diameter) with a greater depth than the layer thickness of the sheath material 21 in the region of the central bore section 3.2 of the inner axial bore 3c can be worked out, so that a step shoulder 37 is produced, to which the inner axial bore 3c to the drilling section with lesser Internal diameter passes.
- the middle drill section with a medium bore diameter then merges into a lower drill section 3.3 or can pass over, which has the smallest drill diameter.
- a bottom recess 3q with a low axial height is formed, which has a comparatively large radial extent, so that the inner conductor 3 is preferably only over its annular, thus remaining Approach 3r in the mounted position with the bottom of the housing or with an optionally provided inner conductor socket mechanically connected and electrically contacted.
- the inner conductor bore 3c is introduced at the lower end with the formation of a shoulder 3j, that is, under a taper of the bore diameter. This allows the inner conductor to be mechanically anchored and galvanically connected to the bottom 5 of the resonator using screws and nuts.
- small modifications are made compared to the variant according to FIG. 5a.
- the embodiment according to FIG. 5b at the transition from the inner conductor bore 3c to the upper end face 3a of the inner conductor 3 each incorporated a conical chamfer 3k through which the bore 3c extends quasi upwards.
- chamfers 31 and 3m are also machined on the upper circumferential edge 33a and the lower circumferential edge 33b of the inner conductor extension region 33, preferably 45 ° bevels, whereby a transition from one boundary surface to the next on the inner conductor extension region 33 in each case 135 ° angle is possible.
- all bevels can be formed at arbitrary angles. Instead of chamfers, radii or curves in any form are conceivable.
- the outgoing shoulder of the sheathing material 21 provided on the lower side 3h of the disc-shaped inner conductor extension region 33 (which can also be referred to as the extension platform 33) is provided with an obliquely tapered chamfer 3n. This is aligned in the embodiment shown in a 45 ° angle to the orientation of the disk-shaped extension region 33, so that overall, as shown in Figure 5b, an opening angle of 90 ° between the opposing outgoing chamfer 3n results.
- An inventive inner conductor 3 designed in this way can be produced by appropriate preprocessing of the inner conductor.
- the sheath material 21 if this is necessary at all - and then adding or replacing it with a the sheath material 21 provided in the context of the invention is produced, namely already with a correspondingly prefabricated resonator, in which the inner conductor, the bottom and the outer walls of the housing are produced, for example, from a one-piece metal block.
- the inner conductor can be molded separately and subsequently connected to the bottom of the resonator, for example, with a screw connection.
- the sheath material 21 consists of a cast-on sheath layer 21a.
- the corresponding covering material 21 is also possible for the corresponding covering material 21 to be manufactured separately, for example cast and subsequently placed on the inner conductor 3.
- the cladding material 21 is in the form of a molded part 21b, in particular a plastic molded part 21b, generally a dielectric molded part 21b, which may be in one or more parts, ie one or more pieces and then placed on the inner conductor.
- FIGS. 6 to 13 schematic axial sectional views are reproduced by a resonator comparable to FIG. 1, in each of which the resonator housing is indicated in section, with internal conductor inside.
- the inner conductor is shown as a solid block.
- the sheathing material 21 is cup-shaped here and in the manner of an inverted pot or a reverse box from above on the Inner conductor 3 is placed according to the pot height of this Ummante- material 21, so for example using a molded part 21b.
- the sheathing material 21 may be formed as a cast-on sprue part 21 a on the inner conductor 3.
- the inner conductor has, in a specific axial dimension, an inner conductor bore 3c, into which - as explained - a threaded element accommodated in the cover, which can be screwed in and out differently, can be screwed in to adjust the resonance frequency.
- the Ummant- lungs material 21 can be sprayed accordingly or placed in prefabricated form.
- the sheathing material 21 is provided at a certain axial height from the end face of the inner conductor on the outer circumference 3g of the inner conductor 3 and on the inner wall 3b of the inner conductor bore 3c to the bottom 30 of the inner conductor bore and formed there.
- the exemplary embodiment according to FIG. 8 corresponds to that according to FIG. 6, with the difference that, for example, a correspondingly separately manufactured and subsequently attached plastic molded part 21b has an integrally formed support 31, for example in FIG. 2, on its upper side, which rests on the end face of the inner conductor Form of a slightly elastic finger-shaped extension 31a, is provided, which is ultimately supported on the underside 7a of the housing cover 7 and at least slightly ter (elastic) bias applied.
- the sheath material 21 in the form of a separately produced Asked and placed plastic molding 21 b held captive on the inner conductor 3.
- FIG. 9 shows an exemplary embodiment in which the plastic molded part 21b shown in FIG. 7 is provided with correspondingly shaped supports 31, for example in the form of, two or more locations offset in the circumferential direction (or even more places) saisingerförmigen elevations 31a, may be formed, which - as explained above - are supported under bias on the underside of the lid 7.
- two or more circumferentially offset integrally formed supports 31 are likewise again provided in the form of finger-shaped elevations 31a which, however, do not extend in the direction of the cover, but rather in the radial direction with at least greater radial than axial component and engage on the Supported inside la of the outer conductor 1, preferably also again under at least slight bias.
- FIGS. 11 to 13 It is shown, inter alia, on the basis of the exemplary embodiments according to FIGS. 11 to 13 that a plurality of different plastic molded parts or different sheathing materials 21 and thus different sheath material layers can also be used.
- the exemplary embodiments according to FIGS. 11 to 13 additionally show that the most varied inner conductors can be used, with or without a protruding disk-shaped extension adjacent to their free end face 3a, with or without different far in the interior of the inner conductor engaging inner or axial bore 3c etc. Restrictions exist insofar as regards the design of the inner conductor not.
- the inner conductor 3 according to its shape outside as in the region of its inner bore 3c and its end face 3a with a sheath material 21, i. here a first cladding material 21 'layered surrounded.
- This layer can be cast or formed in the form of a plastic molding and subsequently attached.
- On this layer of cladding material 21, 21 ' is then e.g. at a lower partial height, starting from the upper end face 3a in the front side region, at the peripheral edge and at a partial height at the outer circumference and in the region of the inner bore 3c, a second covering material 21 "is cast.
- this second sheath material 21 "could also be placed in the form of a second plastic molded part 21b from above and / or be.
- FIG. 13 shows only a modified embodiment whose principles basically correspond to the principles according to the exemplary embodiment according to FIG.
- first and second cladding materials 21 ', 21 can also be formed in an inner conductor 3 with or without inner conductor bore 3c, especially if the inner conductor at its upper inner conductor end below the housing cover 7 with a disk-shaped plateau 33 otherwise radially projecting beyond the inner conductor, So the so-called.
- Inner conductor extension region 33 is provided.
- the inner conductor 3 illustrated there is designed as a screwed-in inner conductor. That it has a configuration as shown in FIG. 5a or similar thereto.
- Such an inner conductor 3 may then be located at a lower level and with the ground, i. the housing bottom 5 of the resonator firmly connected inner conductor base 103 is placed and mechanically anchored by means of a screwed through in the interior of the inner conductor screws on the resonator, preferably for producing a galvanic connection.
- the aforementioned cladding material 21, for example in the form of the first and / or the first and second cladding material 21, has a relative permittivity r which is greater than 1.2.
- Preferred values for the dielectric constant are greater than 1.3, in particular greater than 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2, 3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9 and 3.0.
- the aforementioned cladding material 21, 21 ', 21 " is made of a dielectric material, whereby typical and preferred dielectric materials in the context of the invention are so-called cyclic olefin copolymers (COC).
- COC cyclic olefin copolymers
- the layer thickness for the cladding material 21, in the case of a multi-part layer structure, also with regard to the layer thickness of each of the individual layers, can be selected in different ranges. It is possible that the thickness of the sheath material 21 is at least 0.05 mm, in particular more than 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm and more, and preferably one Thickness which is 3 mm and less.
- these cycl olefin copolymers are materials which are amorphous and thus transparent. Cyclic olefin copolymers are characterized by good thermoplastic flowability, high rigidity, strength and hardness as well as low density and high transparency with good acid alkali resistance.
- the described filters and the described coaxial resonator can be used in broad areas, in particular in mobile radio technology, for example for coaxial xial bandpass filters, coaxial bandstop filters, asymmetric bandstop filters, highpass filters, duplexers, combiners and / or lowpass filters. Typical applications are in the mobile sector in frequency ranges from 380 MHz to 4,000 MHz.
- the frequency ranges above 700 MHz, 800 MHz, 900 MHz, 1,500 MHz, 1,700 MHz, 1,800 MHz, 1,900 MHz, 2,000 MHz, 2,100 MHz, 2,500 MHz, 2,600 MHz or above 3,500 MHz are of particular importance.
- a coaxial resonator and filter or filter assemblies can be realized, which by the whole or partial enclosure of the inner conductor, especially in the region of its free end face and the adjacent areas with dielectric material, a higher power handling and dielectric strength of the individual resonators and thus the filter achieve, compared with the previously known solutions.
- the inventive enclosing with the explained dielectric material allows smaller distances between the inner conductor and the sidewalls and / or the housing decks and / or tuning elements 9, 9 'provided in the interior of the resonators.
- This filter can also be realized with smaller dimensions, which nevertheless have the same glossverlast feelings.
- the invention leads to a reduction in size and ultimately contributes to a reduction in costs.
- the dielectric used or proposed in the context of the invention allows a large tuning range or a large frequency range compared to tuning elements.
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Abstract
Description
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Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014001917.9A DE102014001917A1 (de) | 2014-02-13 | 2014-02-13 | Hochfrequenzfilter in koaxialer Bauweise |
PCT/EP2015/000226 WO2015120964A1 (de) | 2014-02-13 | 2015-02-05 | Hochfrequenzfilter in koaxialer bauweise |
Publications (2)
Publication Number | Publication Date |
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EP3105814A1 true EP3105814A1 (de) | 2016-12-21 |
EP3105814B1 EP3105814B1 (de) | 2018-06-13 |
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EP15703873.8A Active EP3105814B1 (de) | 2014-02-13 | 2015-02-05 | Hochfrequenzfilter in koaxialer bauweise |
Country Status (6)
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US (1) | US10644376B2 (de) |
EP (1) | EP3105814B1 (de) |
KR (1) | KR101938345B1 (de) |
CN (1) | CN105993096B (de) |
DE (1) | DE102014001917A1 (de) |
WO (1) | WO2015120964A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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GB201511325D0 (en) * | 2015-06-29 | 2015-08-12 | Radio Design Ltd | Filter apparatus and method of use thereof |
CN108370077A (zh) * | 2015-12-04 | 2018-08-03 | 瑞典爱立信有限公司 | 具有介质盘的同轴谐振器 |
EP3331093A1 (de) * | 2016-12-01 | 2018-06-06 | Nokia Technologies Oy | Resonator und filter damit |
KR101906464B1 (ko) * | 2017-01-11 | 2018-10-10 | (주)웨이브텍 | 마이크로웨이브 공진기 |
CN113228410B (zh) * | 2018-12-20 | 2023-02-17 | 京瓷Avx元器件公司 | 包括低电感过孔组件的多层滤波器 |
WO2024145844A1 (zh) * | 2023-01-04 | 2024-07-11 | 思摩尔国际控股有限公司 | 气溶胶产生装置及其微波加热组件 |
Family Cites Families (20)
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US4053855A (en) | 1975-10-28 | 1977-10-11 | International Telephone And Telegraph Corporation | Method and arrangement to eliminate multipacting in RF devices |
JPS5535560A (en) | 1978-09-04 | 1980-03-12 | Matsushita Electric Ind Co Ltd | Coaxial type filter |
FR2488056A1 (fr) | 1980-07-29 | 1982-02-05 | Thomson Csf | Resonateur accordable et circuit hyperfrequence comportant au moins un tel resonateur |
JPS58172003A (ja) * | 1982-04-02 | 1983-10-08 | Toyo Commun Equip Co Ltd | 半同軸共振器 |
US6255917B1 (en) | 1999-01-12 | 2001-07-03 | Teledyne Technologies Incorporated | Filter with stepped impedance resonators and method of making the filter |
DE19917087C2 (de) | 1999-04-15 | 2001-07-26 | Kathrein Werke Kg | Hochfrequenzfilter |
JP3478244B2 (ja) | 2000-05-25 | 2003-12-15 | 株式会社村田製作所 | 同軸共振器、フィルタ、デュプレクサおよび通信装置 |
JP2002016411A (ja) | 2000-06-30 | 2002-01-18 | Tdk Corp | 誘電体共振器 |
KR100561694B1 (ko) | 2002-12-27 | 2006-03-15 | 주식회사 케이엠더블유 | 고 유전율 및 높은 선택도 값을 갖는 유전체를 구비하는무선 주파수 필터 |
FI119207B (fi) | 2003-03-18 | 2008-08-29 | Filtronic Comtek Oy | Koaksiaaliresonaattorisuodatin |
DE102004010683B3 (de) | 2004-03-04 | 2005-09-08 | Kathrein-Werke Kg | Hochfrequenzfilter |
EP1596463A1 (de) | 2004-05-15 | 2005-11-16 | Spinner GmbH Elektrotechnische Fabrik | Koaxialer Resonator |
US7224248B2 (en) * | 2004-06-25 | 2007-05-29 | D Ostilio James P | Ceramic loaded temperature compensating tunable cavity filter |
US20060284708A1 (en) | 2005-06-15 | 2006-12-21 | Masions Of Thought, R&D, L.L.C. | Dielectrically loaded coaxial resonator |
US8330561B2 (en) * | 2006-02-24 | 2012-12-11 | Telefonaktiebolaget L M Ericsson (Publ) | Cavity filter, an isolation device, and a node in a mobile communications network |
ITMI20061803A1 (it) | 2006-09-22 | 2008-03-23 | Mario Bandera | Risonatore a cavita' coassiale |
WO2009056154A1 (en) * | 2007-10-30 | 2009-05-07 | Pirelli & C. S.P.A. | Dielectric resonator |
CN201533009U (zh) * | 2009-09-18 | 2010-07-21 | 河北博威集成电路有限公司 | 同轴谐振腔电容加载装置 |
CN201946731U (zh) * | 2010-12-17 | 2011-08-24 | 摩比天线技术(深圳)有限公司 | 谐振器及具有谐振器的滤波器 |
EP2538487A1 (de) * | 2011-06-24 | 2012-12-26 | CommScope Italy S.r.l. | Temperaturunabhängiger dielektrischer Resonator |
-
2014
- 2014-02-13 DE DE102014001917.9A patent/DE102014001917A1/de not_active Withdrawn
-
2015
- 2015-02-05 EP EP15703873.8A patent/EP3105814B1/de active Active
- 2015-02-05 WO PCT/EP2015/000226 patent/WO2015120964A1/de active Application Filing
- 2015-02-05 KR KR1020167023392A patent/KR101938345B1/ko active IP Right Grant
- 2015-02-05 US US15/116,697 patent/US10644376B2/en active Active
- 2015-02-05 CN CN201580008320.4A patent/CN105993096B/zh active Active
Also Published As
Publication number | Publication date |
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KR101938345B1 (ko) | 2019-01-14 |
KR20160120737A (ko) | 2016-10-18 |
US10644376B2 (en) | 2020-05-05 |
US20190036195A1 (en) | 2019-01-31 |
CN105993096A (zh) | 2016-10-05 |
WO2015120964A1 (de) | 2015-08-20 |
DE102014001917A1 (de) | 2015-08-13 |
EP3105814B1 (de) | 2018-06-13 |
CN105993096B (zh) | 2021-04-09 |
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