WO2004105173A1 - Filtre de radiofrequences - Google Patents

Filtre de radiofrequences Download PDF

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Publication number
WO2004105173A1
WO2004105173A1 PCT/KR2004/001120 KR2004001120W WO2004105173A1 WO 2004105173 A1 WO2004105173 A1 WO 2004105173A1 KR 2004001120 W KR2004001120 W KR 2004001120W WO 2004105173 A1 WO2004105173 A1 WO 2004105173A1
Authority
WO
WIPO (PCT)
Prior art keywords
radio frequency
housing
frequency filter
metal resonator
rods
Prior art date
Application number
PCT/KR2004/001120
Other languages
English (en)
Inventor
Jong-Kyu Park
Yong-Sei Jeon
Young-Pyo Hong
Sang-Sik Park
Seung-Taek Jeong
Original Assignee
Kmw Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from KR10-2003-0032293A external-priority patent/KR100489698B1/ko
Priority claimed from KR1020030038549A external-priority patent/KR20040107892A/ko
Application filed by Kmw Inc. filed Critical Kmw Inc.
Publication of WO2004105173A1 publication Critical patent/WO2004105173A1/fr

Links

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

Definitions

  • the present invention relates to a radio frequency filter, and more particularly to a radio frequency filter which is easy to manufacture and has little manufacturing cost.
  • Radio frequency filters are commonly used for passing, blocking, and time delaying of service frequency band signals.
  • the resonance frequency of the radio frequency filters is tuned by a tuning means to adjust the characteristics thereof.
  • a conventional radio frequency filter 100 will now be described with reference to FIGs. 1 to 6.
  • FIG. 1 is a perspective view showing an embodiment of a radio frequency filter 100 having disk-shaped metal resonator rods 120 according to the prior art.
  • the radio frequency filter 100 comprises a metallic housing 110, disk-shaped metal resonator rods 120, a cover 160, and tuning screws 170,
  • the metallic housing 110 has an input connector 111 and an output connector 113.
  • the interior of the metallic housing 110 is divided into a number of containing spaces by diaphragms 130.
  • the disk-shaped metal resonator rods 120 are contained in the respective containing spaces.
  • the input connector 111 and the output connector 113 are positioned on the same side of the metallic housing 110 and each of them is connected to a respective containing space.
  • the diaphragms 130 have coupling windows 131, 132, 133, 134, and 135 formed therein for serial connection from a containing space, to which the input connector 111 is connected, to another containing space, to which the output connector 113 is connected.
  • the metallic housing 110 has an open upper surface.
  • the disk-shaped metal resonator rods 120 are composed of metal resonator rods 121, which extend from the bottom surface of the metallic housing
  • the radio frequency filter 100 wherein disks 122 are positioned on the metal resonator rods 120 which is assembled in the metallic housing 110, is characterized in that it is operated for low resonance frequency.
  • the resonance frequency is determined by values of capacitance and inductance, which are formed among capacitive components 17. and inductive components 19 constituting a resonance circuit, particularly among a metallic housing 110, disk-shaped metai resonator rods 120, diaphragms 130, and a cover 160, as is clear from the circuit diagram shown in FIG. 6.
  • the input and output connectors 111, 113 are connected the disk-shaped metal resonator rods 120 via an input terminal coupling copper wire 115 and an output terminal coupling copper wire 117, respectively.
  • the resonance frequency of the radio frequency filter 100 is affected by the length, outer diameter, and the like of the disk- shaped metal resonator rods 120 and is tuned more precisely with separate tuning screws 170, 175. Referring to FIG. 1, the tuning screws 170, 175 are fastened on the cover
  • the tuning screws 170, 175 are used to tune the resonance and coupling characteristics of the radio frequency filter 100 and are fixed using nuts 171, after the tuning, to prevent them from playing.
  • the cover 160 is provided with fastening holes 169 for screws 179 and the metallic housing 110 is provided with, on its upper end, fastening tabs 180 to fix the cover 160 on the metallic housing 110.
  • the tuning screws 170, 175 are fastened into screw holes (not shown), which are formed on the cover 160, and are used to tune the resonance frequency, inductance, or capacitance.
  • the radio frequency filter 100 is tuned by tightening or loosening the tuning screws 170, 175 to obtain desired resonance and coupling characteristics.
  • the tuning screws 170, 175 are fixed on the cover 160, for example, using nuts 171, lest the resonance frequency, as well as the resonance and coupling characteristics should be changed due to playing of tuning screws 170, 175.
  • the tuning screws 170, 175 are classified into first tuning screws 170, which are fixed in locations corresponding to those of the disk- shaped metal resonator rods 120 and are used to tune the resonance characteristics, and second tuning screws 175, which are fixed in locations corresponding to those of the coupling windows 131-135 and are used to tune the coupling characteristics.
  • the second tuning screws 175 may also be referred to as coupling screws.
  • the first and second tuning screws 170, 175 have different roles according to their locations.
  • the input terminal coupling copper wire 115 and the output terminal coupling copper wire 117 provide inductive couplings 52, 58.
  • the metallic housing 110, the disk-shaped metal resonator rods 120, and the cover 160 constitute parallel LC resonance circuits 10, 11, 12, 13, 14, 15.
  • Each of the resonance circuits 10-15 is provided with a capacitive coupling 17 or an inductive coupling 19 by means of the interrelationship between each of the adjacent disk- shaped metal resonator rods 120, between the disk-shaped metal resonator rods 120 and the metallic housing 110, or between each of the coupling windows 131- 135.
  • the radio frequency filter 100 has a configuration wherein parallel LC resonance circuits 10-15 and an inductive or capacitive coupling are alternated in series between the input and output connectors 111, 113.
  • radio frequency filters have a restriction in that, since they have a number of diaphragms in their metallic housing, the metallic housing should be fabricated through a high precision casting process, such as die casting, or should be subject to milling processing. This results in a problem of increased manufacturing cost.
  • the casting process costs a lot for mold fabricating and is not suitable for small-scale production, while the milling processing is suitable for small-scale production, not for mass production.
  • the present invention has been made to solve the above- mentioned problems occurring in the prior art, and an object of the present invention is to provide a radio frequency filter which is easy to manufacture and has little manufacturing cost.
  • Another object of the present invention is to provide a radio frequency filter which is easy to assemble.
  • a radio frequency filter comprising: a metallic housing having a containing space which extends along its longitudinal direction and the opposite ends of which are open; at least two metal resonator rods which extend upward from the bottom surface of the containing space and are arranged along the longitudinal direction of the housing; tuning screws which are fastened on the upper surface of the metallic housing and the ends of which face the upper end of the metal resonator rods in the containing space; and coupling screws which are positioned between the metal resonator rods and are fastened on the upper surface of the housing in locations corresponding to those of window rods.
  • a radio frequency filter comprising: a housing having a containing space which extends along its longitudinal direction and the opposite ends of which are open; a fixing frame which is fixed on the bottom surface of the containing space of the housing and extends along the longitudinal direction of the housing; at least one metal resonator rod extending up to a predetermined height from the fixing frame; tuning screws which are fastened on the upper surface of the metallic housing and the ends of which face the upper end of the metal resonator rods in the containing space; and front and rear covers coupled to each of the opposite ends of the containing space to seal it.
  • the metal resonator rod and the window rod are alternated along the longitudinal direction of the fixing frame.
  • FIG. 2 is a perspective view, partially broken, illustrating the construction of the radio frequency filter shown in FIG. 1;
  • FIG. 3 is a side sectional view, partially broken, illustrating the construction of the radio frequency filter shown in FIG. 2;
  • FIG. 10 is a perspective view illustrating another type of window rod of the radio frequency filter shown in FIG. 7;
  • FIG. 7 is a perspective view, partially broken, of a radio frequency filter 700 according to a preferred embodiment of the present invention and FIG. 8 is a side sectional view of the radio frequency filter 700 shown in FIG. 7.
  • a radio frequency filter 700 according to a preferred embodiment of the present invention comprises a metallic housing 701, metal resonator rods 702, window rods 705, tuning screws 703a, coupling screws 703b, a front cover 704a, and a rear cover 704b.
  • the metallic housing 701 has a containing space 711a, 711b, which extends along its longitudinal direction and the opposite ends of which are open.
  • the window rods 705 play the same role as the diaphragm 130 (shown in FIG. 1), which has conventional coupling windows 131-135 (shown in FIG. 1) formed therein. Each of the window rods 705 is positioned between two adjacent metal resonator rods 702 and affects the coupling characteristics thereof.
  • the window rods 705 extend from the bottom surfaces of the containing spaces 711a, 711b to the top surfaces thereof. Referring to FIGs. 8 and 9, the window rods 705 have threaded portions 751 on their lower ends, which are fastened on the lower portion of the metallic housing 701 for fixation.
  • the distance between the metal resonator rods 702 of the radio frequency filter 700 may be reduced according to the characteristics thereof, such as. the resonance frequency. In that case, it may be. somewhat difficult to fasten the window rods 705 and the diameter of the upper portion 755b of the window rods 705 may be smaller than that of the middle portion 755a thereof, as shown in FIG. 10.
  • the tuning screws 703 a are fastened on the upper end of the metallic housing 701 and their ends may face the upper surfaces of the metal resonator rods 702 or be positioned in the tuning holes 725 of the metal resonator rods 702.
  • the tuning screws 703 a are used to tune the resonance characteristics of the radio frequency filter 700. In other words, the resonance frequency of the radio frequency filter 700 is tuned according to the distance between the tuning screws 703 a and the metal resonator rods 702.
  • Spring nuts 731 may be fastened on the coupling screws 703b.
  • the spring nuts 731 are supported on the upper surface of the metallic housing 701 and provide elastic force in the longitudinal direction of the coupling screws 703 b. After the coupling characteristics of adjacent metal resonator rods 702 are tuned, the elastic force provided by the spring nuts 731 prevents the coupling screws 703 a from playing.
  • the front cover 704a seals an end of the metallic housing 701.
  • the front cover 704a may have an input connector 743 a and an output connector 743b.
  • the input and output connectors 743a, 743b are connected to adjacent metal resonator rods 702 via an input terminal coupling copper wire 745a and an output terminal coupling copper wire 745b, respectively.
  • the front cover 704a has fastening pieces 741a, which extend from the outer peripheral surface thereof and have a shape corresponding to that of the protrusions 715a of the metallic housing 701.
  • the fastening holes 741a have through-holes 741b formed thereon, through which screws 749 are fastened into the fastening holes 715b of the protrusions 715a to fix the front cover 704a.
  • the fastening holes may also be formed on an end of the diaphragm 713a.
  • the front cover 704 may then have corresponding through-holes.
  • the rear cover 704b seals the other end of the metallic housing 701.
  • the rear cover 704b has fastening pieces 741a, which extend from the outer peripheral surface thereof and have a shape corresponding to that of the protrusions 715a of the metallic housing 701.
  • the fastening holes 741a have through-holes 741b formed thereon, through which screws 749 are fastened into the fastening holes 715b of the protrusions 715a to fix the rear cover 704b.
  • the input and output connectors 743a, 743b may be formed in a somewhat different manner according to the configuration of the radio frequency filter 700.
  • the radio frequency filter 7 has a configuration wherein three pairs of metal resonator rods 702 are arranged in two rows and its metallic housing 701 has input and output connectors 743a, 743b positioned on its end.
  • the number of the metal resonator rods 702 may be larger or smaller than the above configuration, according to the characteristics (for example, frequency band) needed for the system to which the product is applied.
  • the containing spaces 711a, 711b of the metallic housing 701 may be formed as a single space.
  • the input connector 743 a is positioned on the front cover 704a and the output connector 743b on the rear cover 704b.
  • the radio frequency filter 700 according to a preferred embodiment of the present invention, shown in FIG. 7, has the same equivalent circuit as that of the radio frequency filter 100 shown in FIG. 1.
  • the operations of the radio frequency filter 700, constructed as described above, will now be described with reference to FIG. 6.
  • the input terminal coupling copper wire 745a and the output terminal coupling copper wire 745b provide inductive couplings 52, 58.
  • the metal resonator rods 702 and the metallic housing 701 constitute parallel LC resonance circuits 10-15, the resonance characteristics (for example, resonance frequency) of which are tuned by the tuning screws 703 a.
  • variously formed inductive or capacitive couplings 53-57 are provided as follows: an inductive or capacitive coupling between each of the adjacent metal resonator rods 702; an inductive or capacitive coupling between the metal resonator rods 702 and the metallic housing 701; and an inductive or capacitive coupling between the window rods 705 and adjoining metal resonators 702 or metallic housing 701.
  • the coupling characteristics of the inductive or capacitive couplings 53-57 are tuned by the coupling screws 703b.
  • the resonance frequency of each of the parallel LC resonance circuits 10-15 is tuned by the tuning screws 703 a and the coupling characteristics between each of the parallel LC resonance circuits 10-15 are tuned by the coupling screws 703b.
  • a radio frequency signal is applied to the input connector 743 a of the radio frequency filter 700, a current flows through the input terminal coupling copper wire 745 a and electromagnetic energy is formed.
  • the electromagnetic energy is transmitted to the parallel LC resonance circuit 10, which is composed of the metal resonator rods 702, the metallic housing 701, and the like.
  • An energy component of the electromagnetic energy, the frequency of which corresponds to the resonance frequency of the parallel LC resonance circuit 10 is transmitted to the next adjacent parallel LC resonance circuit 11 and remaining components are grounded G.
  • An inductive or capacitive coupling 53 is formed between the parallel LC resonance circuit 10 and the next adjacent parallel LC resonance circuit 11, according to the constructional relationship among the metal resonator rods 702, the metallic housing 701, and the window rod 705 to transmit frequency energy.
  • the frequency energy which is filtered by the parallel LC resonance circuit 10 is transmitted to the next adjacent parallel LC resonance circuit 11 via the inductive or capacitive coupling 53 between the resonance circuit 10 and the resonance circuit 11.
  • the frequency energy the resonance frequency of which corresponds to that of the resonance circuits 10-15
  • the transmitted frequency energy then generates a current by means of the inductive coupling 58 of the output terminal coupling copper wire 745b. Accordingly, only a signal, the resonance frequency of which corresponds to that of the resonance circuits 10-15, is outputted to the output connector 743b.
  • FIG. 11 is an exploded perspective view showing a radio frequency filter 800 according to another preferred embodiment of the present invention, wherein its housing is partially broken for illustration.
  • the radio frequency filter 800 comprises a housing
  • a fixing frame 802 having metal resonator rods 821 and window rods 825 extending in series; a front cover 804a; and a rear cover 804b.
  • the housing 801 has a containing space 811a, 811b, which extends along its longitudinal direction and the opposite ends of which are open.
  • the containing space 811a, 811b is divided into two spaces by a diaphragm 813a, which extends along the longitudinal direction of the housing 801.
  • One end of the diaphragm 813a contacts an end of the housing 801, while the other end of the diaphragm 813a is spaced a predetermined distance from the other end of the housing 801. Accordingly, a space is defined between the other end of the housing 801 and the other end of the diaphragm 813a to enable the two divided containing spaces 811a, 811b communicate with each other.
  • a coupling screw 803b may be fastened in the space between the other ends of diaphragm 813a and the housing 801 to tune the coupling characteristics between the two divided containing spaces 811a, 811b.
  • the coupling screw 803b may be fastened adjacently to the bottom surfaces of the containing spaces 811a, 811b from the upper end of the housing 801.
  • the housing 801 is generally made of metallic material, but may also be made of synthetic resin, if necessary. When the housing is made of synthetic resin, it may be coated with metallic coating material, on its surface, according to the characteristics of the radio frequency filter 800.
  • the housing 801 constructed as described above, can be manufactured using extrusion, since it is composed of the containing spaces 811a, 811b, which extend along its longitudinal direction, and the diaphragm 813a.
  • the extrusion process is advantageous in that it can manufacture products with less cost, regardless of production quantity, compared with a high precision casting process, such as die casting, or a fabrication process, such as milling.
  • the housing is initially fabricated as a kind of frame, through extrusion.
  • the frame is then cut into a housing having a length corresponding to a final specification, and is provided with fastening holes, screw holes, and the like.
  • the containing spaces 811a, 811b of the housing 801 may be divided into two spaces by the diaphragm 813a. Alternatively, they may be formed as a single space, instead of being divided.
  • the fixing frame 802 extends along the longitudinal direction of the housing 801 and is fixed on the bottom surfaces of the containing spaces 811a, 811b.
  • the fixing frame 802 shown in FIG. 11 is fastened on the bottom surfaces of the containing spaces 811a, 811b by means of fastening means, such as screws.
  • a predetermined shape of slot may be formed on the bottom surfaces of the containing spaces 811a, 811b and extend along their longitudinal direction, as well as a rail may be formed on the lower end of the fixing frame 802 with a corresponding shape to be inserted into the slot.
  • the slot may be formed on the lower surface of the fixing frame 802 and the rail may be formed on the bottom surfaces of the containing spaces 811a, 811b.
  • the metal resonator rods 821 extend along a direction from the fixing frame 802 and have screw holes 823 formed on their upper ends.
  • the number of the metal resonator rods 821 may be modified according to the specification needed for the radio frequency filter 800.
  • Disks 805 are fastened on the upper ends of the metal resonator rods 821. To this end, the disks 805 have threaded rods 851 corresponding to the screw holes 823, which are formed on the upper ends of the metal resonator rods 821.
  • the disks 805 also have tuning holes 853, which are recessed a predetermined depth from their other surfaces.
  • the disks 805 are preferably spaced a predetermined distance from the upper surfaces of the containing spaces 811a, 811b.
  • the window rods 825 extend in the same direction as that of the metal resonator rods 821 from the fixing frame 802 and have screw holes 827 formed on their upper ends.
  • the height of the upper ends of the window rods 825 measured from the lower end of the fixing frame 802 corresponds to that of the containing spaces 811a, 811b. If necessary, the height of the window rods 825 may be smaller that that of the containing spaces 811a, 811b and then the screw holes 827 may be omitted.
  • the metal resonator rods 821 and the window rods 825 are alternated along the longitudinal direction of the fixing frame 802.
  • the metal resonator rods 821 and the window rods 825 are integrally formed on the fixing frame 802, respectively, and may be manufactured using processing, molding, or extrusion. If an extrusion process is used, a piece is first fabricated in the shape of a frame, in which a rectangular space is formed, and cut into appropriate width to form the fixing frame 802, the metal resonator rods 821, and the window rods 825 at the same time.
  • screws are fastened from the lower surface of the housing 802 to fix the housing 802 on the bottom surfaces of the containing spaces 811a, 811b.
  • screws 839 may be coupled on the upper ends of the window rods 825 from the upper surface of the housing 801.
  • tuning screws 803 a are coupled on the upper surface of the housing 801 in locations corresponding to those of the tuning holes 853 of the disks 805. By adjusting their fastening depth, the tuning screws 803a are used to tune the resonance characteristics of the radio frequency filter 800.
  • the tuning screws 803a face the tuning holes 853 in the containing spaces 811a, 811b and, if necessary, their ends may be positioned in the tuning holes 853.
  • the front cover 804a seals an end of the housing 801.
  • the front cover 804a has a pair of coupling copper wires 845.
  • the coupling copper wires 845 are adapted to electrically connect an input or output connector (not shown) with adjoining metal resonator rod 802.
  • the front cover 804a is fastened on an end of the housing 801 by means of a fastening means, such as a screw.
  • the rear cover 804b is fastened on the other end of the housing 801 to seal the containing spaces.
  • the radio frequency filter 800 according to another embodiment of the present invention, shown in FIG. 11, has the same equivalent circuit as that of the radio frequency filter 100 shown in FIG. 1.
  • the operations of the radio frequency filter 800, constructed as described above, will now be described with reference to FIG. 6.
  • the coupling copper wires 845 provide inductive couplings 52, 58.
  • the metal resonator rods 821 and the housing 801 constitute parallel LC resonance circuits 10-15, the resonance characteristics (for example, resonance frequency) of which are tuned by the tuning screws 803a.
  • variously formed inductive or capacitive couplings 53-57 are provided as follows: an inductive or capacitive coupling between each of the adjacent metal resonator rods 821; an inductive or capacitive coupling between the metal resonator rods 821 and the housing 801; and an inductive or capacitive coupling between the window rods 825 and adjoining metal resonators 821 or housing 801.
  • the coupling characteristics of the inductive or capacitive couplings 53-57 are changed according to the shape, size, and the like of the window rods 825.
  • the size of the window rods 825 may be easily adjusted by those skilled in the art according to the characteristics of the radio frequency filter 800. If a radio frequency signal is applied to a side of the coupling copper wires 845 of the radio frequency filter 800, a current flows and electromagnetic energy is formed.
  • the electromagnetic energy is transmitted to the parallel LC resonance circuit 10, which is composed of the metal resonator rods 821, the housing 801, and the like.
  • An energy component of the electromagnetic energy, the frequency of which corresponds to the resonance frequency of the parallel LC resonance circuit 10 is transmitted to the next adjacent parallel LC resonance circuit 11 and remaining components are grounded G.
  • An inductive or capacitive coupling 53 is formed between the parallel LC resonance circuit 10 and the next adjacent parallel LC resonance circuit 11, according to the constructional relationship among the metal resonator rods 821, the housing 801, and the window rods 825 to transmit frequency energy.
  • the frequency energy which is filtered by the parallel LC resonance circuit 10 is transmitted to the next adjacent parallel LC resonance circuit 11 via the inductive or capacitive coupling 53 between the resonance circuit 10 and the resonance circuit 11.
  • the frequency energy the resonance frequency of which corresponds to that of the resonance circuits 10-15
  • the transmitted frequency energy then generates a current by means of the inductive coupling 58 of the coupling copper wires 845. Accordingly, only a signal, the resonance frequency of which corresponds to that of the resonance circuits 10-15, is outputted to the coupling copper wires.
  • the radio frequency filter according to the present invention has a metallic housing, which has containing spaces extending along its longitudinal direction, and is advantageous in that it is easy to manufacture and it can be manufactured with less cost.
  • conventional radio frequency filters use a high precision die casting process or a milling process to manufacture a metallic housing, which has a number of diaphragm therein. Accordingly, they have a problem of high fabrication cost of molds or increased unit price of individual products due to the fabrication process.
  • the metallic housing is manufactured using a extrusion process. Therefore, the precision of products is guaranteed and the manufacturing cost of the radio frequency filter is reduced by decreasing the unit price.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

L'invention concerne un filtre de radiofréquences. Ledit filtre présente un boîtier métallique possédant un espace de confinement s'étendant dans le sens longitudinal et par conséquent facile à fabriquer avec un coût de fabrication réduit. Le boîtier métallique dudit filtre de radiofréquences est fabriqué à l'aide d'un procédé d'extrusion. Par conséquent, la précision des produits est garantie et le coût de fabrication du filtre de radiofréquences est réduit du fait de la diminution du prix unitaire. En outre, le boîtier métallique, lequel est fabriqué à l'aide du procédé d'extrusion, se présente initialement sous forme d'un châssis long, lequel peut être découpé en sections de longueurs appropriées et utilisé selon la spécification nécessaire pour le produit. Cela permet l'adaptation active à la spécification du produit. De plus, les tiges de résonateur en métal et les tiges de fenêtres sont formées solidaires par construction dans un cadre de fixation unique et peuvent par conséquent être facilement installées dans le boîtier.
PCT/KR2004/001120 2003-05-21 2004-05-13 Filtre de radiofrequences WO2004105173A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2003-0032293 2003-05-21
KR10-2003-0032293A KR100489698B1 (ko) 2003-05-21 2003-05-21 무선 주파수 필터
KR10-2003-0038549 2003-06-14
KR1020030038549A KR20040107892A (ko) 2003-06-14 2003-06-14 무선 주파수 필터

Publications (1)

Publication Number Publication Date
WO2004105173A1 true WO2004105173A1 (fr) 2004-12-02

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Application Number Title Priority Date Filing Date
PCT/KR2004/001120 WO2004105173A1 (fr) 2003-05-21 2004-05-13 Filtre de radiofrequences

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CN (1) CN100544198C (fr)
WO (1) WO2004105173A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017095310A1 (fr) * 2015-12-04 2017-06-08 Telefonaktiebolaget Lm Ericsson (Publ) Résonateur coaxial avec disque diélectrique
WO2018162795A1 (fr) * 2017-03-06 2018-09-13 Tongyu Technology Oy Structure de boîtier de filtre rf et son procédé de fabrication
EP3379641A1 (fr) * 2017-03-22 2018-09-26 ACE Technologies Corporation Filtre rf pour améliorer la performance d'un pimd
WO2019193281A1 (fr) 2018-04-03 2019-10-10 Ergosup Procede et dispositif de stockage et de production d'electricite par voie electrochimique a partir d'hydrogene gazeux, kit comprenant ce dispositif et des consommables
EP3879622A1 (fr) * 2014-12-15 2021-09-15 CommScope Italy S.r.l. Filtre en ligne doté d'un couplage inductif et capacitif de compensation mutuelle

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KR101036127B1 (ko) * 2008-06-27 2011-05-23 주식회사 에이스테크놀로지 Ｒｆ 필터의 공진기 제조 방법 및 그 공진기를 구비한 ｒｆ필터
CN103117437A (zh) * 2011-11-17 2013-05-22 成都赛纳赛德科技有限公司 一种小型化滤波器
WO2019200604A1 (fr) * 2018-04-20 2019-10-24 Nokia Shanghai Bell Co., Ltd. Appareil de type filtre, procédé
CN110559558A (zh) * 2019-08-19 2019-12-13 南京从景生物技术有限公司 一种新型射频发射源
WO2021049666A1 (fr) * 2019-09-13 2021-03-18 正毅 千葉 Filtre à haute fréquence
CN113224497A (zh) * 2021-06-03 2021-08-06 苏州波发特电子科技有限公司 滤波器的窗口耦合结构

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US5023579A (en) * 1990-07-10 1991-06-11 Radio Frequency Systems, Inc. Integrated bandpass/lowpass filter
US5990763A (en) * 1996-08-05 1999-11-23 Adc Solitra Oy Filter having part of a resonator and integral shell extruded from one basic block
US6366184B1 (en) * 1999-03-03 2002-04-02 Filtronic Lk Oy Resonator filter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5023579A (en) * 1990-07-10 1991-06-11 Radio Frequency Systems, Inc. Integrated bandpass/lowpass filter
US5990763A (en) * 1996-08-05 1999-11-23 Adc Solitra Oy Filter having part of a resonator and integral shell extruded from one basic block
US6366184B1 (en) * 1999-03-03 2002-04-02 Filtronic Lk Oy Resonator filter

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3879622A1 (fr) * 2014-12-15 2021-09-15 CommScope Italy S.r.l. Filtre en ligne doté d'un couplage inductif et capacitif de compensation mutuelle
US11757164B2 (en) 2014-12-15 2023-09-12 Commscope Italy S.R.L. In-line filter having mutually compensating inductive and capactive coupling
WO2017095310A1 (fr) * 2015-12-04 2017-06-08 Telefonaktiebolaget Lm Ericsson (Publ) Résonateur coaxial avec disque diélectrique
US10122061B2 (en) 2015-12-04 2018-11-06 Telefonaktiebolaget Lm Ericsson (Publ) Coaxial resonator with dielectric tip
WO2018162795A1 (fr) * 2017-03-06 2018-09-13 Tongyu Technology Oy Structure de boîtier de filtre rf et son procédé de fabrication
EP3379641A1 (fr) * 2017-03-22 2018-09-26 ACE Technologies Corporation Filtre rf pour améliorer la performance d'un pimd
WO2019193281A1 (fr) 2018-04-03 2019-10-10 Ergosup Procede et dispositif de stockage et de production d'electricite par voie electrochimique a partir d'hydrogene gazeux, kit comprenant ce dispositif et des consommables

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