Filter for Communication Equipment

Abstract

Provided is a filter for a communication device that enables a slim design of the product and prevents an increase in the weight of the product. 【Solution means】The filter for a communication device includes a frequency tuning panel provided with a plurality of tuning bars arranged as a single layer in the thickness direction in the dielectric filling space so as to adjust the separation distance from a plurality of resonators arranged in the dielectric filling space, and a resonance substrate arranged as a single layer in the thickness direction in the dielectric filling space, the plurality of resonators being formed as the single layer and including a resonance frame having a rectangular edge.

Description

Technical Field

[0001] The present invention relates to a filter for a communication device, and more particularly, to a filter for a communication device that can be manufactured to have a slim thickness while achieving weight reduction.

Background Art

[0002] A radio frequency device such as a radio frequency filter (including all "communication devices") is usually composed of a connection structure of a plurality of resonators. Such a resonator is a circuit element that resonates at a specific frequency by a combination of an inductor (L) and a capacitor (C) in terms of an equivalent electronic circuit, and each resonator has a structure in which a dielectric resonance element (DR) or a metal resonance element is provided inside a cavity such as a metallic cylinder or a rectangular parallelepiped surrounded by a conductor. Thereby, each resonator has a structure that enables high-frequency resonance by allowing only an electromagnetic field of a natural frequency according to a processing frequency band to exist in the cavity. Usually, a plurality of resonance stages are formed using a plurality of cavities, and a multi-stage structure in which the plurality of resonance stages are sequentially connected is provided.

[0003] Examples of radio frequency filters having a plurality of cavity structures include those disclosed in Korean Patent Publication No. 10-2004-0100084 (title: "Radio Frequency Filter", publication date: December 2, 2004) previously filed by the applicant of the present application.

[0004] However, in a conventional radio frequency filter, each resonator extends in the thickness direction within the cavity, and a part of a filter tuning cover that covers the cavity is deformed by a punching method so as to have a desired band-pass characteristic, and the distance from the resonator is adjusted to tune the frequency. However, there are very restrictive problems in reducing the size of the completed filter in the thickness direction.

[0005] In addition, a conventional radio frequency filter is for enhancing the skirt characteristics between adjacent resonators or separated resonators within a plurality of cavities, and requires the installation of an additional configuration of a conductor material to achieve inductive coupling or capacitive coupling. However, it is also pointed out that there is a problem that the weight of the completed filter increases significantly. Summary of the Invention Problems to be Solved by the Invention

[0006] The present invention has been made to solve the above technical problems, and an object thereof is to provide a filter for a communication device including a tuning panel provided with a plurality of tuning bars arranged as a single layer in the thickness direction within a dielectric filling space.

[0007] At the same time, another object of the present invention is to provide a filter for a communication device capable of performing frequency tuning by adjusting the separation distance between a plurality of resonators of a resonance substrate arranged as a single layer different from the tuning panel in the thickness direction within the dielectric filling space.

[0008] Furthermore, still another object is to provide a filter for a communication device including a notch forming portion formed as a single layer the same as the tuning panel.

[0009] The technical problems of the present invention are not limited to the problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description. Means for Solving the Problems

[0010] A filter for a communication device according to an embodiment of the present invention includes a frequency tuning panel provided with a plurality of tuning bars arranged as a single layer in the thickness direction within the dielectric filling space so as to adjust the separation distance from a plurality of resonators arranged within the dielectric filling space.

[0011] Here, the dielectric-filled space may be a closed space having a thickness smaller than the sizes in the longitudinal and width directions.

[0012] Further, the frequency tuning panel can include a tuning frame having an edge provided in a rectangular shape, and the plurality of tuning bars extending from the inner side of one long side to the other long side among the four sides of the tuning frame.

[0013] Further, the plurality of tuning bars can be integrally formed with the tuning frame.

[0014] Further, the plurality of tuning bars may be provided at a predetermined distance apart in the longitudinal direction.

[0015] Further, the plurality of tuning bars may be arranged at a distance apart in the longitudinal direction at positions respectively matched with the plurality of resonators arranged at a distance apart in the thickness direction within the dielectric-filled space.

[0016] Further, the plurality of tuning bars may have different lengths extending to the other long side.

[0017] Further, the frequency tuning panel can further include a notch forming portion that protrudes and extends while forming a closed loop from the inner side of the other long side to the one long side among the four sides of the tuning frame, or extends so as to be connected to the inner side of the one long side without forming the closed loop.

[0018] Further, the notch forming portion can include an L-notch portion that forms the closed loop and a C-notch portion that does not form the closed loop.

[0019] Further, the L-notch portion can realize cross-coupling according to the nature of the magnetic field among any three adjacent resonators within the dielectric-filled space.

[0020] Further, the C-notch portion can realize cross-coupling based on the nature of the electric field between any three adjacent resonators within the dielectric-filled space.

[0021] Furthermore, a resonant substrate can be further included, which is arranged as a single layer in the thickness direction within the dielectric-filled space, and the plurality of resonators are formed as the single layer and include a resonant frame having rectangular edges.

[0022] Also, the plurality of resonators may be formed to extend a predetermined length from one long side of the four sides of the resonant frame toward the other long side, and at least overlap the plurality of tuning bars in a predetermined length in the thickness direction.

[0023] Also, the plurality of resonators can extend separated from the other long side.

[0024] Furthermore, a spacer panel can be further included, which is arranged to be laminated in the thickness direction in the dielectric-filled space between the frequency tuning panel and the resonant substrate to block direct contact between the frequency tuning panel and the resonant substrate.

[0025] Also, the spacer panel may be formed corresponding to the edge shapes of the tuning frame of the frequency tuning panel and the resonant frame of the resonant substrate.

[0026] Also, the frequency tuning panel can include a tuning frame having a thickness larger than that of the plurality of tuning bars, and the resonant substrate can include a resonant frame having a thickness larger than that of the plurality of resonators.

[0027] Further, on one side in the thickness direction of the dielectric-filled space, there is provided a filter body that is formed to be open, forms a part of the dielectric-filled space, and has a mounting space for laminating the resonance substrate and the frequency tuning panel therein, and a filter tuning cover that covers the one open side in the thickness direction of the filter body and forms the rest of the dielectric-filled space.

[0028] Also, on the inner surface in the thickness direction of the filter body, a plurality of space-dividing ribs that divide a part of the dielectric-filled space and protrude so as to separate between the plurality of resonators of the resonance substrate can be integrally formed.

[0029] Further, a plurality of tuning holes for pushing the plurality of tuning bars may be formed in the filter tuning cover using a predetermined tool.

[0030] Also, a plurality of coupling adjustment bars that are deformed in shape toward the dielectric-filled space side and change the coupling value between adjacent resonators among the plurality of resonators can be cut and formed in the filter tuning cover.

[0031] Further, the plurality of coupling adjustment bars may be alternately arranged with the plurality of resonators in the thickness direction of the dielectric-filled space.

Advantages of the Invention

[0032] According to the filter for a communication device according to an embodiment of the present invention, the following various effects can be achieved.

[0033] First, since the plurality of resonators of the resonance substrate and the plurality of tuning bars of the frequency tuning panel are arranged as different single layers in the dielectric-filled space, there is an effect that the slim manufacturing design of the product is easy.

[0034] Second, since the notch forming portion is provided to form the same single layer as the plurality of tuning bars of the frequency tuning panel or the same single layer as the resonator of the resonance substrate, no additional components are required for skirt characteristics, thus preventing an increase in the weight of the product and having the effect of facilitating lightweight design.

Brief Description of the Drawings

[0035]

Figure 1

Figure 2A

Figure 2B

Figure 3

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Figure 5

Figure 6A

Figure 6B

Figure 7

Figure 8A

Figure 8B

Figure 9

Figure 10

Figure 11A

Figure 11B

Modes for Carrying Out the Invention

[0036] Hereinafter, a filter for a communication device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0037] When attaching reference numerals to the components in each drawing, it should be noted that for the same components, as far as possible, they have the same reference numerals even if they are shown on other drawings. Also, when explaining the embodiments of the present invention, if it is determined that a specific explanation of such a known configuration or function hinders the understanding of the embodiments of the present invention, the detailed explanation thereof will be omitted.

[0038] When explaining the components of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. can be used. Such terms are merely for distinguishing the components from other components, and the essence, order, or procedure of the components are not limited by such terms. Also, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those having ordinary knowledge in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or overly formal sense unless clearly defined in this application.

[0039] Filters 1, 100, 200, 300 for communication devices according to embodiments of the present invention include filter bodies 10, 110, 210, 310 and filter tuning covers 20, 120, 220, 320 coupled to the filter bodies 10, 110, 210, 310 so as to form dielectric filling spaces 10S, 110S, 210S, 310S between the filter bodies 10, 110, 210, 310.

[0040] The dielectric filling spaces 10S, 110S, 210S, and 310S are filled with a dielectric having a predetermined dielectric constant. In the embodiments of the present invention, air also corresponds to a dielectric material having a predetermined dielectric constant. Therefore, the description will be made on the premise that the dielectric filling spaces 10S, 110S, 210S, and 310S are filled with air as the dielectric. Thus, when air is adopted as the dielectric, as long as the dielectric filling spaces 10S, 110S, 210S, and 310S are not in a sealed vacuum state, it would mean that the dielectric filling spaces 10S, 110S, 210S, and 310S, which consist of empty spaces, will be naturally filled with air as the dielectric without another dielectric filling process.

[0041] Hereinafter, the filter for a communication device according to the present invention will be described in detail for each embodiment in turn.

[0042] FIG. 1 is a perspective view showing a filter for a communication device according to the first embodiment of the present invention. FIGS. 2A and 2B are exploded perspective views of FIG. 1. FIG. 3 is an exploded perspective view and a partial enlarged view showing a resonator of a resonance substrate and a tuning bar of a frequency tuning panel among the configurations of FIG. 1. FIG. 4 is a partial cutaway perspective view showing the inside of a dielectric filling space among the configurations of FIG. 1.

[0043] As shown in FIGS. 1 to 4, the filter 1 for a communication device according to the first embodiment of the present invention can include a filter body 10, a filter tuning cover 20 coupled to form the dielectric filling space 10S between the filter body 10, a resonance substrate 30 including a plurality of resonators 31 arranged to form a single layer in the thickness direction within the dielectric filling space 10S, and a frequency tuning panel 40 including a plurality of tuning bars 41 arranged to form a single layer in the thickness direction within the dielectric filling space 10S.

[0044] As shown in FIGS. 2A and 2B, the filter body 10 may be formed in a slim rectangular parallelepiped shape so as to form a closed dielectric filling space 10S having a thickness t smaller than the sizes in the substantially longitudinal direction l and width direction w.

[0045] Here, a part of the dielectric filling space 10S can be formed by the open-side space of the filter body 10, and the rest of the dielectric filling space 10S can be formed by the other-side space of the filter tuning cover 20.

[0046] For forming such a dielectric filling space 10S, the filter body 10 is provided in a form that a side surface to which the filter tuning cover 20 is coupled is recessed by a predetermined depth in a direction (vertical direction in the drawing) in which the other side surface faces, and the inner surface of the filter tuning cover 20 may also be provided in a form that is recessed by a predetermined depth in the opposite direction (upper direction in the drawing).

[0047] Although a dielectric having a predetermined dielectric constant can be filled inside the dielectric filling space 10S, as described above, since air is also a kind of dielectric having a predetermined dielectric constant, in the first embodiment of the present invention (the same applies to the second to fourth embodiments described later), the description will be made on the premise that the dielectric filling space 10S is filled with air.

[0048] On the other hand, in the filter body 10, an input port hole 17h and an output port hole 17h for fixing an input port 5A and an output port 5B for inputting a predetermined signal to one side of a resonance substrate 30 to be described later can be formed to penetrate so as to communicate with the dielectric filling space 10S.

[0049] Here, the input port 5A and the output port 5B can be electrically connected to the port connecting holes 37hA and 37hB of the resonance substrate 30 so as to maintain impedance matching, respectively, via an input unit coaxial connector 5A' and an output unit coaxial connector 5B'. However, the electrical connection with the resonance substrate 30 is not necessarily limited to a method using the input port 5A and the input unit coaxial connector 5A' and the output port 5B and the output unit coaxial connector 5B'. Any electrical connection configuration with any structure such as a pin can be used as long as it is a conductive medium provided on a main board (not shown).

[0050] The resonance substrate 30 is arranged as a single layer in the thickness direction t within the dielectric filling space 10S, and a plurality of resonators 31 are also formed as a single layer, and can include a resonance frame 30F having rectangular edges.

[0051] Here, the resonance frame 30F may be formed to have an edge portion that matches the edge end portions of the substantially filter body 10 and the filter tuning cover 20.

[0052] Hereinafter, for convenience of understanding, it is assumed that the resonance frame 30F is formed by being cut open in a rectangle in the middle and communicating in the vertical direction, and is formed in a long rectangle (rectangle) from the left side direction to the right side direction on the drawings of FIGS. 2A and 2B, and the left end portion and the right end portion in the longitudinal direction are each relatively small in side length and are thus referred to as "short sides", and the front end portion and the rear end portion in the width direction are each relatively large in side length and are thus referred to as "long sides" for explanation.

[0053] Here, as shown in FIGS. 2A and 2B, a plurality of resonators 31 can be formed to extend a predetermined length from one long side 30A of the four sides (four sides) of the resonance frame 30F toward the other long side 30B.

[0054] However, it is preferable that a plurality of resonators 31 are formed so that their tips are separated from the inner edge of the other long side 30B described above and are not connected.

[0055] Also, a plurality of resonators 31 may be formed so that their tips have the same separation distance from the inner edge of the other long side 30B. However, the extension time point portions of each of the plurality of resonators 31 do not have to be all the same, and can be designed so that the extension time point portions are different based on the frequency band pass characteristics required by the designer. That is, the extension time point portions of each of the plurality of resonators 31 correspond to the inner edge of any one of the long sides 30A described above, but may be provided in a form that extends from the inner edge of this long side 30A to each extension time point portion of the adjacent resonator 31.

[0056] On the other hand, as shown in FIGS. 2A and 2B, the frequency tuning panel 40 may be arranged as a single layer between the resonance substrate 30 and the filter tuning cover 20.

[0057] More specifically, the frequency tuning panel 40 can include a tuning frame 40F having an edge provided in a rectangular shape, and a plurality of tuning bars 41 extending from the inner side of one long side 40A of the four sides (four sides) of the tuning frame 40F to the other long side 40B side.

[0058] Here, the plurality of tuning bars 41 can be integrally formed on the tuning frame 40F. Preferably, the plurality of tuning bars 41 can be integrally extended from the inner side of one long side 40A of the tuning frame 40F and extend a predetermined length so as to form the same single layer in the thickness direction t of the dielectric filling space 10S.

[0059] Such a frequency tuning panel 40 may be arranged as a single layer different from the plurality of resonators 31 in the thickness direction t in the dielectric filling space 10S so as to adjust the separation distance (see "T" in FIG. 3) between the plurality of tuning bars 41 and the plurality of resonators 31 arranged in the dielectric filling space 10S.

[0060] Here, the plurality of tuning bars 41 may be provided at a predetermined distance apart in the longitudinal direction l along the inner edge surface of one long side 40A of the tuning frame 40F, and each tuning bar 41 may be arranged at a position spaced apart in the longitudinal direction l so as to be respectively matched with the plurality of resonators 31 arranged at intervals in the thickness direction t in the dielectric filling space 10S.

[0061] On the other hand, unlike the different extension time points of the plurality of resonators 31 described above, the extension time point parts inside one long side 40A of the tuning frame 40F can be set at the inner edge end corresponding to one long side 40A of the tuning frame 40F that is all on the same line.

[0062] Further, the tips of the plurality of tuning bars 41 extend such that the tips of the plurality of resonators 31 described above have the same separation distance from the inner edge of the other long side 30B of the resonance frame 30F, whereas the lengths extending toward the other long side 40B can be set to be the same or different from each other.

[0063] However, in this case, the plurality of tuning bars 41 are configured to perform fine frequency tuning by adjusting the separation distance T from the plurality of resonators 31 arranged as different single layers in the dielectric filling space 10S. In this regard, it is preferable that the plurality of resonators 31 or the plurality of tuning bars 41 are designed to be arranged with a predetermined length overlapping at least in the thickness direction t of the dielectric filling space 10S.

[0064] At this time, assuming that the dielectric filled in the dielectric filling space 10S is air, it goes without saying that an air layer exists between the plurality of resonators 31 of the resonance substrate 30 and the tuning bars 41 of the frequency tuning panel 40, and an air layer having the same dielectric constant can also exist between the plurality of resonators 31 and the inner surface of the filter body 10. Fine frequency tuning can be performed by a fine change in the air layer due to the amount of shape deformation of each of the tuning bars 41 of the frequency tuning panel 40.

[0065] On the other hand, in the filter 1 for a communication device according to the first embodiment of the present invention, as shown in FIGS. 2A and 2B, the frequency tuning panel 40 further includes a notch forming portion 42 including an L-notch portion 42L that protrudes and extends while forming a closed loop from the inner side of the other long side 40B toward the one long side 40A side among the four sides (four sides) of the tuning frame 40F, and a C-notch portion 42C that extends so as to be connected to the inner side of the one long side 40A without forming a closed loop.

[0066] Here, the L-notch portion 42L serves to enhance the skirt characteristics and form an L-notch by inductive coupling at the right end of the passband, and the C-notch portion 42C serves to enhance the skirt characteristics and form a C-notch by capacitive coupling at the left end of the passband.

[0067] The L-notch portion 42L may be extended and provided so as to form a closing loop that does not contact the one long side 40A while forming the same single layer as the tuning bar 41 described above from the inside of the other long side 40B of the frequency tuning panel 40.

[0068] At the same time, the C-notch portion 42C may be extended and provided so as to be connected to the one long side 40A while forming the same single layer as the tuning bar 41 described above from the inside of the other long side 40B of the frequency tuning panel 40 or from the L-notch portion 42L described above.

[0069] Here, the C-notch portion 42C is different from the L-notch portion 42L in that it does not form a closed loop with respect to the other long side 40B within the same single layer.

[0070] The C-notch portion 42C and the L-notch portion 42L form an electric field (E-field) or a magnetic field (H-field) among a plurality of resonators 31 provided within the same single layer with their respective shapes and the shapes of the corner portions and bent portions being the same, and form the above-described C-notch or L-notch on the left or right side of the passband.

[0071] On the other hand, as shown in FIGS. 2A and 2B, the C-notch portion 42C among the C-notch portion 42C and the L-notch portion 42L can be formed by extending from the inner edge end of the other long side 40B of the frequency tuning panel 40, and can also be formed by extending from a part of the pre-formed L-notch portion 42L.

[0072] On the one hand, as described above, the resonator 31 of the resonance substrate 30 and the tuning bar 41 of the frequency tuning panel 40 require a structural design for ensuring a minimum isolation distance in terms of adjusting the isolation distance in the thickness direction t to perform fine frequency tuning.

[0073] For this purpose, the filter 1 for a communication device according to the first embodiment of the present invention can further include a spacer panel 50 disposed so as to be laminated in the thickness direction t in the dielectric filling space 10S between the resonance substrate 30 and the frequency tuning panel 40 to block direct contact between the frequency tuning panel 40 and the resonance substrate 30.

[0074] Here, the meaning of blocking direct contact between the frequency tuning panel 40 and the resonance substrate 30 by the spacer panel 50 only means avoiding physical space contact by forming a thickness to ensure an isolation distance, and does not mean blocking electrical connection.

[0075] The spacer panel 50 may be formed corresponding to the edge shapes of the tuning frame 40F of the frequency tuning panel 40 and the resonance frame 30F of the resonance substrate 30.

[0076] Such a spacer panel 50 has an air layer between the resonator 31 of the resonance substrate 30 and the tuning bar 41 of the frequency tuning panel 40, and serves to ensure the above-described isolation distance so that a desired passband frequency can be tuned by finely adjusting the separation distance T in this air layer.

[0077] However, the spacer panel 50 does not necessarily have to be separately manufactured and laminated between the resonance substrate 30 and the frequency tuning panel 40. Instead, it can be integrally formed on the edge upper surface portion of the resonance substrate 30 to have different thicknesses. Conversely, it can also be integrally formed on the edge lower surface portion of the frequency tuning panel 40 to have different thicknesses. By integrally forming and laminating the edge upper surface portion of the resonance substrate 30 and the edge lower surface portion of the frequency tuning panel 40 so that they are each half different from the thickness of the spacer panel 50, it is sufficient to ensure the isolation distance described above.

[0078] That is, the tuning frame 40F of the frequency tuning panel 40 may be formed to have a thickness greater than that of the plurality of tuning bars 41, and the resonance frame 30F of the resonance substrate 30 may be formed to have a thickness greater than that of the plurality of resonators 31. In this case, the surface where the tuning frame 40F and the plurality of tuning bars 41 are matched is arranged at the upper part of the drawing, and the surface where the resonance frame 30F and the plurality of resonators 31 are matched is arranged at the lower part of the drawing. An additional isolation distance for separating the plurality of tuning bars 41 and the plurality of resonators 31 by the spacer panel 50 described above can be ensured. At the same time, as shown in FIGS. 1 to 4, the dielectric filling space 10S corresponding to the space between the filter body 10 and the filter tuning cover 20 is filled with a dielectric defined by air. After a designer performing tuning inserts a predetermined tuning tool (not shown) into the inside of the dielectric filling space 10S through the lower part of the filter body 10 or the upper part of the filter tuning cover 20, the tip of the resonator 31 can be pushed to change its shape in the thickness direction t toward the tuning bar 41 side, or the tip of the tuning bar 41 can be changed in shape in the thickness direction t toward the resonator 31 side to perform fine frequency tuning operations.

[0079] Here, a plurality of bottom tuning holes 12 for inserting the above-described tuning tool may be formed on the lower surface of the filter body 10 so as to communicate with the dielectric filling space 10S, and a plurality of upper tuning holes 22 for inserting the above-described tuning tool may be formed on the upper surface of the filter tuning cover 20 so as to communicate with the dielectric filling space 10S.

[0080] However, it is not necessary for the filter body 10 and the filter tuning cover 20 to be provided with all of the bottom tuning holes 12 and the upper tuning holes 22. Any one of the two may function as a tuning hole into which the original tuning tool is inserted, and the remaining one may be provided to function as a tuning correction hole for the purpose of correction after tuning.

[0081] Further, the filter body 10 may not be provided with the bottom tuning holes 12, and only the filter tuning cover 20 may be provided with the upper tuning holes 22 and the tuning correction holes 21. The tuning correction hole 21 may be a hole provided to readjust the deformed tuning bar 41 by inserting another tuning correction tool (not shown) when correction is required after performing fine frequency tuning using the tuning tool.

[0082] The filter for a communication device according to the first embodiment of the present invention having such a configuration can be coupled so that the dielectric filling space 10S is closed by using coupling screws (not shown) that are sequentially stacked and arranged with the filter body 10, the resonance substrate 30, the spacer panel 50, the frequency tuning panel 40, and the filter tuning cover 20 and fastened through a plurality of stacked coupling screw holes 15, 35, 55, 45, 25 provided at each edge portion.

[0083] Here, the filter body 10, the resonance substrate 30, the spacer panel 50, the frequency tuning panel 40, and the filter tuning cover 20 may all be made of a metal material, or after being made of a predetermined dielectric material, the portions exposed on the dielectric filling space 10S side may all be coated with a metal material. As long as the portions exposed on the dielectric filling space 10S side are coated with a metal material and the dielectric filling space 10S can be formed as a closed space, the lamination bonding method of the remaining components (resonance substrate 30, spacer panel 50, frequency tuning panel 40, and filter tuning cover 20) with respect to the filter body 10 does not necessarily have to be a screw bonding method, and various bonding methods including a welding bonding method and an adhesive bonding method may be applied.

[0084] Hereinafter, with reference to FIGS. 3 and 4, the communication device filter 1 according to the first embodiment of the present invention configured as described above will explain a specific passband frequency filtering process.

[0085] First, when a predetermined signal is input into the dielectric filling space 10S through the input port 5A on one side, it is sequentially transmitted in the longitudinal direction l through the resonator 31 of the resonance substrate 30 connected through the input part coaxial connector 5A' of the input port 5A in the dielectric filling space 10S, and then output through the resonator 31 of the resonance substrate 30 connected to the output part coaxial connector 5B' of the output port 5B in the dielectric filling space 10S.

[0086] At this time, only a specific band-pass frequency can be output by fine frequency tuning by the detailed design of the separation distance T in the vertical thickness direction t between each resonator 31 and the tuning bar 41.

[0087] Here, according to the filter 1 for a communication device according to the first embodiment of the present invention, the extension forming direction of the resonator 31 is provided so as to form a single layer with respect to the thickness direction t in the dielectric filling space 10S, and the tuning bar 41 is also provided so that its extension forming direction forms a single layer with respect to a thickness direction t different from that of the resonator 31 in the dielectric filling space 10S. As a result, the overall thickness of the product can be made slim, and fine frequency tuning is possible within the limit of the isolation distance of each single layer with respect to the different thickness directions t described above, providing an advantage.

[0088] Hereinafter, filters 100, 200, and 300 for communication devices according to the second to fourth embodiments realized in embodiments different from the filter 1 for a communication device according to the first embodiment described above will be sequentially described. However, the configurations overlapping with the first embodiment (1) are replaced with the contents already described, and each embodiment (100, 200, 300) will be described centering on the parts different from the first embodiment (1).

[0089] FIG. 5 is a perspective view showing a filter for a communication device according to the second embodiment of the present invention, and FIGS. 6A and 6B are exploded perspective views of FIG. 5.

[0090] As shown in FIGS. 5 to 6B, in the filter 100 for a communication device according to the second embodiment of the present invention, the filter tuning cover 120 is deformed in shape on the dielectric filling space 110S side, and a plurality of coupling adjustment bars 122 for changing the coupling value between adjacent resonators among the plurality of resonators 131 can be formed by incision.

[0091] More specifically, the plurality of coupling adjustment bars 122 may be formed so as to be alternately arranged with the plurality of resonators 131 with respect to the thickness direction t of the dielectric filling space 110S.

[0092] Here, each of the plurality of coupling adjustment bars 122 is integrally connected to the filter tuning cover 120 on one side, and the remaining part except the part integrally connected to the filter tuning cover 120 can be formed by incision in an inverted "C" shape.

[0093] Among the plurality of resonators 131, when a tip of any one of the plurality of coupling adjustment bars 122 is pushed toward the dielectric filling space 110S side using a predetermined tool so that a tuning operator (designer) between adjacent resonators can realize a desired coupling value, the tip of the coupling adjustment bar 122 is deformed and positioned between the adjacent resonators 131. In addition to the design values according to the specific shapes of the above-described C-notch portion 142C or L-notch portion 142L, each shape deformation of the coupling adjustment bar 122 enables the tuning operator to realize the coupling value as desired design values.

[0094] FIG. 7 is a perspective view showing a filter for a communication device according to a third embodiment of the present invention, FIGS. 8A and 8B are exploded perspective views of FIG. 7, and FIG. 9 is a partial cutaway perspective view showing the inside of the dielectric filling space in the configuration of FIG. 7.

[0095] In the filter 1 for a communication device according to the first embodiment of the present invention already described with reference to FIGS. 1 to 4, the resonator 31 of the resonance substrate 30 and the tuning bar 41 of the frequency tuning panel 40 are formed so as to extend in the same direction (for example, from one long side 30A, 40A to the other long side 30B, 40B side), but it is not necessarily limited to this.

[0096] That is, as shown in FIGS. 8A and 8B, in the filter 200 for a communication device according to the third embodiment, when the resonance frame 230F of the resonance substrate 230 has a rectangular horizontal cross section, a part 231 of the resonators 231, 232 of the resonance substrate 230 can be formed to extend a predetermined length from one long side 230A to the other long side 230B side. Of course, the remaining 232 of the resonators 231, 232 of the resonance substrate 230 can be formed to extend a predetermined length from the other long side 230B to the one long side 230A side.

[0097] Here, among the plurality of resonators 231 and 232, the adjacent resonators 231 and 232 may be formed to intersect in a zigzag direction such that each tip has a length that overlaps a predetermined length in the width direction w of the resonance substrate 230 and the extending directions do not overlap in the longitudinal direction l of the resonance substrate 230.

[0098] Further, when the tuning frame 240F of the frequency tuning panel 240 has a rectangular horizontal cross-section, part 241 of the tuning bars 241 and 242 of the frequency tuning panel 240 can be formed to extend a predetermined length from one long side 240A to the other long side 240B side. Of course, the remaining 242 of the tuning bars 241 and 242 of the frequency tuning panel 240 can be formed to extend a predetermined length from the other long side 240B to the one long side 240A side.

[0099] At the same time, among the plurality of tuning bars 241 and 242, the adjacent tuning bars 241 and 242 may be formed to intersect in a zigzag direction such that each tip has a length that overlaps a predetermined length in the width direction w of the frequency tuning panel 240 and the extending directions do not overlap in the longitudinal direction l of the frequency tuning panel 240.

[0100] At this time, it is sufficient that part of the tuning bars 241 and 242 of the frequency tuning panel 240 overlaps the resonators 231 and 232 of the resonance substrate 230 in the thickness direction t. By physically separating one dielectric filling space 210S with the resonators 231 and 232 and the tuning bars 241 and 242 extending in opposite directions, the effect of having a plurality of cavities can be imparted.

[0101] At the same time, as shown in FIGS. 8A and 8B, the filter 200 for a communication device according to the third embodiment may be provided such that the notch forming portion 233 interconnects adjacent resonators 231 among the resonators in which the notch forming portion 233 is formed to extend from one long side 230A of the resonance frame 230F to the other long side 230B. The notch forming portion 233 here can serve as an L-notch portion that strengthens the skirt characteristics to form an L-notch by inductive coupling at the right end of the passband.

[0102] This is different in that, in the case of the first embodiment (1), it is provided to form the same single layer as the tuning bar 41 on the frequency tuning panel 40, while in the third embodiment (200), the notch forming portion 233 is formed on the resonance substrate 230.

[0103] FIG. 10 is a perspective view showing a filter for a communication device according to a fourth embodiment of the present invention, and FIGS. 11A and 11B are exploded perspective views of FIG. 10.

[0104] As shown in FIGS. 10 to 11B, the filter 300 for a communication device according to the fourth embodiment of the present invention may further include a plurality of space dividing ribs 317W that do not completely partition the dielectric filling space 310S, but at least partially partition the bottom surface portion of the dielectric filling space 310S formed by the filter body 310.

[0105] The plurality of space dividing ribs 317W are formed to extend from the bottom surface on one long side to the bottom surface on the other long side so as to partition the inner bottom surface portion formed long in the longitudinal direction l of the filter body 310 into a plurality of surfaces, and may be formed in a rib shape that protrudes a predetermined length from at least the bottom surface of the dielectric filling space 310S toward the filter tuning cover 320.

[0106] Such a plurality of space-dividing ribs 317W occupy a part of the dielectric-filled space 310S and partition the space between at least the resonators 331 in a cavity form. Accordingly, by adjusting the coupling amount between adjacent resonators 331 according to the size and form of the occupied space, there is an advantage that tuning of various passband frequencies is possible.

[0107] At the same time, the filter body 310 can be coupled so that the entire bottom surface is soldered to the main board side (not shown). Further, by dividing the bottom surface of the filter body 310 in the longitudinal direction l by the plurality of space-dividing ribs 317W, it is also possible to play a role of dispersing and eliminating the thermal stress generated by the difference in the coefficient of thermal expansion from the main board made of a PCB material.

[0108] As shown in FIGS. 1 to 11B, the filters 1, 100, 200, 300 for communication devices according to the embodiments of the present invention utilize the properties of the electric field and the magnetic field between the respective resonators 31, 131, 231, 331 provided inside the dielectric-filled spaces 10S, 110S, 210S, 310S to realize inductive coupling L-notch portions 42L, 142L, 233, 343L and capacitive coupling C-notch portions 42C, 142C, 343C, which has already been described.

[0109] Inductive coupling is a type of coupling that utilizes the nature of the magnetic field around resonators 31, 131, 231, 331 provided in dielectric-filled spaces 10S, 110S, 210S, 310S. As long as there is no structure that affects the nature of the magnetic field between adjacent resonators 31, 131, 231, 331, it is a coupling that is naturally formed between them. In particular, when realizing cross-coupling that bypasses the resonator provided in the middle among any three resonators 31, 131, 231, 331, the meaning of providing the above-described L-notch portions 42L, 142L, 233, 343L is greater. Here, in the case of the filters 1, 100, 200, 300 for communication devices according to the embodiments of the present invention, the L-notch portions 42L, 142L, 233, 343L are provided so as not to block the signal transmission path direction between the tips of adjacent resonators 31, 131, 231, 331, and have a portion closer to the resonator provided in the middle among any three resonators 31, 131, 231, 331 (see the first embodiment (1), the second embodiment (100), and the fourth embodiment (300)), or may be provided in a form that directly connects the resonators on both sides excluding the resonator provided in the middle (see the third embodiment (200)).

[0110] On the other hand, capacitive coupling is a type of coupling that utilizes the nature of the electric field around resonators 31, 131, 231, 331 provided in dielectric-filled spaces 10S, 110S, 210S, 310S, and can be realized by a structure arranged on the signal transmission path corresponding to the electric field of adjacent resonators 31, 131, 231, 331.

[0111] More specifically, the C-notch portions 42C, 142C, 342C realized by the first embodiment, the second embodiment, and the fourth embodiment extend and are connected from the other long sides 40B, 140B, 340B of the frequency tuning panels 40, 140, 340 to the one long sides 40A, 140A, 340A, and are formed to be involved in any three resonators 31, 131, 331 in the dielectric-filled spaces 10S, 110S, 310S. In this case, the start ends and the tip ends of the C-notch portions 42C, 142C, 342C can be designed to be arranged closer to the middle resonator among any three resonators 31, 131, 331, respectively.

[0112] However, in the third embodiment (200), although the C-notch portion (not shown in the drawing reference numeral) was not specifically shown, in the case of the third embodiment (200), the resonators 231 and 232 provided in the resonance substrate 230 extend in opposite directions from one long side 230A and the other long side 230B of the resonance frame 230F, respectively, and their tips are provided so as to overlap each other on the above-described signal transmission path. Needless to say, if necessary, it can be designed and arranged in an appropriate shape in consideration of the pre-formed L-notch portion 233.

[0113] As described above, the filter for a communication device according to the embodiment of the present invention has been described in detail with reference to the attached drawings. However, it goes without saying that the embodiments of the present invention are not necessarily limited to the above-described embodiments, and various modifications and implementations within an equivalent range can be made by those having ordinary knowledge in the technical field to which the present invention pertains. Therefore, the true scope of the rights of the present invention is defined by the scope of the claims described below.

Industrial Applicability

[0114] The present invention includes a tuning panel provided with a plurality of tuning bars arranged as a single layer in the thickness direction within a dielectric-filled space, and can perform frequency tuning by adjusting the separation distance between a plurality of resonators of a resonance substrate arranged as a single layer different from the tuning panel in the thickness direction within the dielectric-filled space, and provides a filter for a communication device including a notch forming portion formed as a single layer identical to the tuning panel.

Explanation of Reference Numerals

[0115] 1, 100, 200, 300: Filter, 10, 110, 210, 310: Filter Body 20, 120, 220, 320: Filter Tuning Cover 21, 121, 221, 321: Tuning Correction Hole 30, 230: Resonance Substrate, 31, 131, 231, 331: Resonator 40, 140, 240, 340: Frequency Tuning Panel 41, 141, 241, 341: Tuning Bar 50: Spacer Panel, 122, 222, 322: Coupling Adjustment Bar

Claims

1. A filter for a communication device, including a frequency tuning panel provided with a plurality of tuning bars arranged as a single layer in the thickness direction within a dielectric-filled space so as to adjust the separation distance from a plurality of resonators arranged within the dielectric-filled space.

2. The filter for a communication device according to claim 1, wherein the dielectric-filled space is a closed space having a thickness smaller than the sizes in the longitudinal direction and the width direction.

3. The frequency tuning panel includes a tuning frame having an edge provided in a rectangular shape, and the plurality of tuning bars extending from the inner side of one long side among the four sides of the tuning frame to the other long side; the filter for a communication device according to claim 1.

4. The filter for a communication device according to claim 3, wherein the plurality of tuning bars are integrally formed on the tuning frame.

5. The filter for a communication device according to claim 3, wherein the plurality of tuning bars are provided at a predetermined distance apart in the longitudinal direction.

6. The filter for a communication device according to claim 3, wherein the plurality of tuning bars are arranged at a distance apart in the longitudinal direction at positions respectively matched with the plurality of resonators arranged at a distance apart in the thickness direction within the dielectric-filled space.

7. The filter for a communication device according to claim 3, wherein the plurality of tuning bars each extend to the other long side with different lengths.

8. The frequency tuning panel further includes a notch forming portion that protrudes and extends while forming a closed loop from the inner side of the other long side among the four sides of the tuning frame to the one long side, or extends so as to be connected to the inner side of the one long side without forming the closed loop; the filter for a communication device according to claim 3.

9. The notch forming portion includes an L-notch portion that forms the closed loop, and a C-notch portion that does not form the closed loop; the filter for a communication device according to claim 8.

10. The filter for a communication device according to claim 9, wherein the L-notch portion realizes cross-coupling due to the nature of the magnetic field among any three adjacent resonators within the dielectric-filled space.

11. The filter for a communication device according to claim 9, wherein the C-notch portion realizes cross-coupling due to the nature of the electric field among any three adjacent resonators within the dielectric-filled space.

12. The filter for a communication device according to claim 1, further comprising a resonance substrate disposed as a single layer in the thickness direction within the dielectric-filled space, wherein the plurality of resonators are formed as the single layer and include a resonance frame having rectangular edges.

13. The plurality of resonators are formed to extend a predetermined length from one long side of the four sides of the resonance frame toward the other long side, and arranged to overlap with at least the plurality of tuning bars and a predetermined length in the thickness direction, the filter for a communication device according to claim 12.

14. The plurality of resonators extend separated from the other long side, the filter for a communication device according to claim 13.

15. The filter for a communication device according to claim 12, further comprising a spacer panel disposed to be laminated in the thickness direction in the dielectric-filled space between the frequency tuning panel and the resonance substrate to block direct contact between the frequency tuning panel and the resonance substrate.

16. The spacer panel is formed corresponding to the edge shapes of the tuning frame of the frequency tuning panel and the resonance frame of the resonance substrate, the filter for a communication device according to claim 15.

17. The frequency tuning panel includes a tuning frame having a thickness larger than that of the plurality of tuning bars, The resonance substrate includes a resonance frame having a thickness larger than that of the plurality of resonators, the filter for a communication device according to claim 12.

18. A filter body formed to be open on one side in the thickness direction of the dielectric-filled space, forming a part of the dielectric-filled space, and provided with a mounting space for laminating the resonance substrate and the frequency tuning panel therein, and a filter tuning cover covering the open side in the thickness direction of the filter body and forming the rest of the dielectric-filled space, the filter for a communication device according to claim 12.

19. On the inner surface in the thickness direction of the filter body, a plurality of space dividing ribs are integrally formed to divide a part of the dielectric-filled space and project so as to separate between the plurality of resonators of the resonance substrate, the filter for a communication device according to claim 18.

20. The filter tuning cover for a communication device according to claim 18, wherein a plurality of tuning holes are formed for pushing the plurality of tuning bars using a predetermined tool.

21. The filter tuning cover for a communication device according to claim 18, wherein a plurality of coupling adjustment bars are formed by incision and are deformed in shape on the dielectric filling space side to change the coupling value between adjacent resonators among the plurality of resonators.

22. The filter for a communication device according to claim 20, wherein the plurality of coupling adjustment bars are alternately arranged with the plurality of resonators in the thickness direction of the dielectric filling space.

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