Communications equipment filters

Abstract

Provided is 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-filled space. 【Solution means】The filter for a communication device includes a filter body that is open in the thickness direction and forms a part of the dielectric-filled space inside, a filter tuning cover that is open and coupled in the thickness direction so as to cover the filter body and forms the remainder of the dielectric-filled space, and a tuning frame provided with a plurality of tuning bars arranged as a single layer in the thickness direction within the dielectric-filled space so as to adjust the separation distance from a plurality of resonators arranged within the dielectric-filled space, and a resonance substrate including a resonance frame in which the plurality of resonators are arranged to form a single layer in the thickness direction within the dielectric-filled space.

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 a reduction in weight. [Background technology]

[0002] Radio frequency devices (including all "communications devices") such as radio frequency filters are typically constructed with a structure in which multiple resonators are connected. Such resonators are circuit elements that resonate at a specific frequency by combining an inductor (L) and a capacitor (C) in an equivalent electronic circuit. 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 rectangular parallelepiped surrounded by a conductor. As a result, each resonator has a structure in which only an electromagnetic field of a natural frequency according to the processing frequency band exists within the cavity, enabling high-frequency resonance. Typically, multiple resonant stages are formed using multiple cavities, and a multi-stage structure is formed in which multiple resonant stages are connected in sequence.

[0003] An example of a radio frequency filter having a multiple cavity structure is disclosed in Korean Patent Publication No. 10-2004-0100084 (title: "Radio Frequency Filter", publication date: December 2, 2004), which was filed earlier by the applicant of the present application.

[0004] However, in conventional radio frequency filters, each resonator extends in the thickness direction within the cavity, and a part of the filter tuning cover covering the cavity is deformed by punching to adjust the distance between the resonators and tune the frequency so as to have the desired bandpass characteristics. However, this has a problem of very limited reduction in the size of the completed filter in the thickness direction.

[0005] Furthermore, conventional radio frequency filters are designed to enhance the skirt characteristics between adjacent resonators or between distant resonators in multiple cavities, and require the installation of additional conductive material structures to achieve inductive coupling or capacitive coupling, which has been pointed out as a problem in that the weight of the completed filter increases significantly. Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made to solve the above-mentioned technical problems, and has as its object to provide a filter for a communication device that includes a tuning panel having a plurality of tuning bars arranged as a single layer in the thickness direction within a dielectric-filled space.

[0007] Another object of the present invention is to provide a filter for a communication device that can perform frequency tuning by adjusting the separation distance between a plurality of resonators of a resonant substrate that is disposed as a single layer separate from a tuning panel in the thickness direction within a dielectric-filled space.

[0008] It is yet another object of the present invention to provide a filter for a communications device that includes a notch formation portion formed as the same single layer as the tuning panel.

[0009] The technical problems of the present invention are not limited to those 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 problem]

[0010] A filter for a communication device according to one embodiment of the present invention includes a filter body that is open in a thickness direction and forms a part of a dielectric-filled space therein; a filter tuning cover that is connected to the filter body in a thickness direction and opens to cover the filter body, forming the remainder of the dielectric-filled space; a frequency tuning panel that includes a tuning frame having a plurality of tuning bars that are arranged in a single layer in the thickness direction within the dielectric-filled space so as to adjust a separation distance from a plurality of resonators arranged in the dielectric-filled space; and a resonator substrate that includes a resonator frame that is arranged in the dielectric-filled space so that the plurality of resonators form a single layer in the thickness direction within the dielectric-filled space, and the frequency tuning panel is arranged in the dielectric-filled space in a single layer in the thickness direction that is different from the plurality of resonators of the resonator substrate.

[0011] Here, when the tuning frame has a rectangular horizontal cross section, the tuning bars can be formed so that some of them extend a predetermined length from one of the four long sides of the tuning frame (hereinafter referred to as "one long side") to the other long side (hereinafter referred to as "the other long side"), and the rest of them extend a predetermined length from the other long side of the four sides of the tuning frame to the one long side.

[0012] In addition, the adjacent tuning bars among the plurality of tuning bars may have a length such that their ends overlap within a predetermined range in the width direction of the frequency tuning panel.

[0013] In addition, adjacent ones of the plurality of tuning bars may be formed to cross each other in a zigzag direction in the longitudinal direction of the frequency tuning panel so that their extending directions do not overlap.

[0014] The resonators of the resonator substrate may be formed at positions corresponding to the tuning bars in the longitudinal direction of the resonator frame.

[0015] The dielectric-filled space may be a closed space having a thickness smaller than the longitudinal and width dimensions.

[0016] The plurality of tuning bars may be integrally formed with the tuning frame, and the plurality of resonators may be integrally formed with the resonator frame.

[0017] The plurality of resonators may have different lengths extending toward the other long side or the one long side.

[0018] Furthermore, when the tip of each of the plurality of resonators extends from the one long side to the other long side, it may be spaced apart from the other long side, and when the tip extends from the other long side to the one long side, it may be spaced apart from the one long side.

[0019] The frequency tuning panel may further include a spacer panel that is disposed to be stacked in the thickness direction in the dielectric-filled space between the frequency tuning panel and the resonant substrate, and that blocks direct contact between the frequency tuning panel and the resonant substrate.

[0020] The spacer panel may be formed to correspond to the edge shapes of the tuning frame of the frequency tuning panel and the resonator frame of the resonator substrate.

[0021] Furthermore, a plurality of space-dividing ribs can be integrally formed on the inner surface of the filter body in the thickness direction, protruding so as to divide a portion of the dielectric-filled space and separate the plurality of resonators of the resonance substrate.

[0022] The filter tuning cover may also be formed with a plurality of tuning holes for pushing the tuning bars with a predetermined tool.

[0023] In addition, a plurality of coupling adjustment bars may be cut into the filter tuning cover and deformed toward the dielectric-filled space to change a coupling value between adjacent resonators among the plurality of resonators.

[0024] The coupling adjustment bars may be arranged alternately with the resonators in the thickness direction of the dielectric-filled space.

[0025] The resonator substrate may further include an L-notch portion that realizes inductive coupling by utilizing the properties of a magnetic field between the plurality of resonators within the dielectric-filled space.

[0026] The L-notch portion may be configured to interconnect adjacent resonators among the resonators formed by extending from the other long side to the one long side among four sides of the resonator frame. [Effects of the Invention]

[0027] The filter for a communication device according to an embodiment of the present invention can achieve the following various effects.

[0028] First, the plurality of resonators of the resonant substrate and the plurality of tuning bars of the frequency tuning panel are arranged in separate single layers within the dielectric-filled space, which facilitates the slim manufacturing design of the product.

[0029] Second, since the notch forming portion is provided so as to form the same single layer as the multiple tuning bars of the frequency tuning panel or the same single layer as the resonators of the resonant substrate, no additional parts are required for skirt characteristics, which prevents the product from increasing in weight and facilitates a lightweight design. [Brief explanation of the drawings]

[0030] [Figure 1] 1 is a perspective view showing a filter for a communication device according to a first embodiment of the present invention. [Figure 2A] FIG. 2 is an exploded perspective view of FIG. 1. [Figure 2B] FIG. 2 is an exploded perspective view of FIG. 1. [Figure 3] 2 is an exploded perspective view showing a resonator of a resonant substrate and a tuning bar of a frequency tuning panel in the configuration of FIG. 1, and a partially enlarged view thereof. [Figure 4] 2 is a partially cutaway perspective view showing the inside of a dielectric-filled space in the configuration of FIG. 1. FIG. [Figure 5] FIG. 10 is a perspective view showing a filter for a communication device according to a second embodiment of the present invention. [Figure 6A] FIG. 6 is an exploded perspective view of FIG. 5. [Figure 6B] FIG. 6 is an exploded perspective view of FIG. 5. [Figure 7] FIG. 10 is a perspective view showing a filter for a communication device according to a third embodiment of the present invention. [Figure 8A] FIG. 8 is an exploded perspective view of FIG. 7. [Figure 8B] FIG. 8 is an exploded perspective view of FIG. 7. [Figure 9] 8 is a partially cutaway perspective view showing the inside of a dielectric-filled space in the configuration of FIG. 7. FIG. [Figure 10] FIG. 10 is a perspective view showing a filter for a communication device according to a fourth embodiment of the present invention. [Figure 11A] FIG. 11 is an exploded perspective view of FIG. [Figure 11B] FIG. 11 is an exploded perspective view of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0031] 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.

[0032] When assigning reference numerals to components in each drawing, it should be noted that the same components are assigned the same numerals as much as possible even if they are displayed in different drawings. Furthermore, when describing the embodiments of the present invention, if it is determined that a detailed description of such well-known configurations or functions would hinder understanding of the embodiments of the present invention, the detailed description will be omitted.

[0033] When describing components of embodiments of the present invention, terms such as "first," "second," "A," "B," "(a)," and "(b)" may be used. These terms are merely used to distinguish the component from other components and do not limit the nature, order, or procedure of the components. Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted to have a meaning consistent with the meaning they have in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly defined in this application.

[0034] A filter 1, 100, 200, 300 for a communication device according to an embodiment of the present invention includes a filter body 10, 110, 210, 310 and a filter tuning cover 20, 120, 220, 320 coupled to the filter body 10, 110, 210, 310 so as to form a dielectric-filled space 10S, 110S, 210S, 310S between the filter body 10, 110, 210, 310, and the filter tuning cover 20, 120, 220, 320.

[0035] The dielectric-filled spaces 10S, 110S, 210S, and 310S are filled with a dielectric having a predetermined dielectric constant, and in the embodiments of the present invention, air also corresponds to a dielectric material having a predetermined dielectric constant. Therefore, the following description will be given assuming that the dielectric-filled spaces 10S, 110S, 210S, and 310S are filled with air as a dielectric. When air is used as a dielectric, this means that the dielectric-filled spaces 10S, 110S, 210S, and 310S, which are empty spaces, are naturally filled with air as a dielectric without a separate dielectric filling process, unless the dielectric-filled spaces 10S, 110S, 210S, and 310S are in a sealed vacuum state.

[0036] Hereinafter, the filters for communication devices according to the present invention will be described in detail in order of each embodiment.

[0037] FIG. 1 is a perspective view showing a filter for a communication device according to a 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 partially enlarged view showing a resonator of a resonance substrate and a tuning bar of a frequency tuning panel in the configuration of FIG. 1, and FIG. 4 is a partially cutaway perspective view showing the inside of a dielectric-filled space in the configuration of FIG. 1.

[0038] As shown in Figures 1 to 4, a filter 1 for a communication device according to a first embodiment of the present invention includes a filter body 10, a filter tuning cover 20 coupled to the filter body 10 to form the dielectric-filled space 10S, a resonance substrate 30 including a plurality of resonators 31 arranged to form a single layer in the thickness direction within the dielectric-filled 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-filled space 10S.

[0039] As shown in Figures 2A and 2B, the filter body 10 may be formed in a slim rectangular parallelepiped shape to form a closed dielectric-filled space 10S having a thickness t that is smaller than the dimensions in the longitudinal direction l and width direction w.

[0040] Here, a part of the dielectric filling space 10S may be formed as an open space on one side of the filter body 10, and the rest of the dielectric filling space 10S may be formed as an open space on the other side of the filter tuning cover 20.

[0041] To form such a dielectric-filled space 10S, the filter body 10 may have one side to which the filter tuning cover 20 is coupled recessed to a predetermined depth in the direction facing the other side (upward and downward in the drawing), and the inner surface of the filter tuning cover 20 may also be recessed to a predetermined depth in the opposite direction (upward in the drawing).

[0042] The inside of the dielectric-filled space 10S can be filled with a dielectric having a predetermined dielectric constant, but as explained above, air is also a type of dielectric having a predetermined dielectric constant, so in the first embodiment of the present invention (the second to fourth embodiments described below are all the same), the description will be given on the assumption that the space is filled with a dielectric called air.

[0043] Meanwhile, the filter body 10 can be formed with an input port hole 17h and an output port hole 17h to which an input port 5A and an output port 5B for inputting a predetermined signal are fixed on one side of the resonant substrate 30 described later, so as to penetrate and communicate with the dielectric filling space 10S.

[0044] Here, the input port 5A and the output port 5B can be electrically connected to the port connecting holes 37hA and 37hB of the resonant substrate 30 via the input coaxial connector 5A' and the output coaxial connector 5B', respectively, so as to maintain impedance matching. However, the electrical connection with the resonant substrate 30 is not necessarily limited to the method using the input port 5A and the input coaxial connector 5A' and the output port 5B and the output coaxial connector 5B', and electrical connection can be made using any electrical connection structure, such as a pin, as long as it is a conductive medium provided on a main board (not shown).

[0045] The resonator substrate 30 is disposed as a single layer in the thickness direction t within the dielectric-filled space 10S, and the plurality of resonators 31 are also formed as a single layer, and may include a resonator frame 30F having rectangular edges.

[0046] Here, the resonator frame 30F may be formed to have edges that substantially match the edges of the filter body 10 and the filter tuning cover 20.

[0047] For ease of understanding, the following description will be based on the assumption that the resonant frame 30F is formed by cutting a rectangle in the middle and connecting it vertically, and that it is formed into a quadrangle (rectangle) that is long from left to right in the drawings of Figures 2A and 2B.The left and right ends in the longitudinal direction will be referred to as the "short sides" because their sides are relatively short, and the front and rear ends in the width direction will be referred to as the "long sides" because their sides are relatively long.

[0048] Here, as shown in Figures 2A and 2B, the multiple resonators 31 can be formed to extend a predetermined length from one long side 30A of the four sides (four sides) of the resonant frame 30F toward the other long side 30B.

[0049] However, it is preferable that the plurality of resonators 31 are formed at intervals so that their tips are not connected to the inner edge of the other long side 30B.

[0050] Furthermore, the resonators 31 may be formed so that their tips are spaced the same distance from the inner edge of the other long side 30B. However, the extension points of the resonators 31 do not all have to be the same, and the resonators 31 may be designed so that the extension points are different depending on the frequency bandpass characteristics desired by the designer. That is, the extension point of each of the resonators 31 corresponds to the inner edge of one of the long sides 30A described above, but the resonators 31 may be provided in a form that extends from the inner edge of the long side 30A to the extension points of the adjacent resonators 31.

[0051] Alternatively, the frequency tuning panel 40 may be disposed as a single layer between the resonant substrate 30 and the filter tuning cover 20, as shown in Figures 2A and 2B.

[0052] More specifically, the frequency tuning panel 40 may include a tuning frame 40F having rectangular edges and a plurality of tuning bars 41 extending from the inside of one long side 40A of the four sides (four sides) of the tuning frame 40F toward the other long side 40B.

[0053] Here, multiple tuning bars 41 can be formed integrally with tuning frame 40F. Preferably, multiple tuning bars 41 can be formed to extend integrally from the inside of one long side 40A of tuning frame 40F and to extend a predetermined length so as to form the same single layer in the thickness direction t of dielectric-filled space 10S.

[0054] Such a frequency tuning panel 40 may be arranged in the dielectric-filled space 10S as a single layer separate from the multiple resonators 31 in the thickness direction t so that the multiple tuning bars 41 adjust the separation distance (see "T" in Figure 3) from the multiple resonators 31 arranged in the dielectric-filled space 10S.

[0055] Here, the plurality of tuning bars 41 may be provided along the inner edge surface of one long side 40A of the tuning frame 40F, spaced a predetermined distance apart in the longitudinal direction l, and each tuning bar 41 may be arranged spaced apart in the longitudinal direction l at a position that matches with each of the plurality of resonators 31 arranged spaced apart in the thickness direction t within the dielectric-filled space 10S.

[0056] On the other hand, unlike the multiple resonators 31 described above, which have different extension point locations, the multiple tuning bars 41 can all be set at the inner edge of one long side 40A of the tuning frame 40F, which is on the same line, corresponding to one long side 40A of the tuning frame 40F.

[0057] Furthermore, while the tips of the multiple tuning bars 41 extend so as to have the same distance from the tips of the multiple resonators 31 described above to the inner edge of the other long side 30B of the resonator frame 30F, the lengths extending toward the other long side 40B can be set to be the same or different.

[0058] However, in this case, since the multiple tuning bars 41 are configured to perform fine frequency tuning by adjusting the separation distance T between the multiple resonators 31 arranged as different single layers in the dielectric-filled space 10S, it is preferable that the multiple resonators 31 or the multiple tuning bars 41 be designed to be arranged so that they overlap by at least a predetermined length in the thickness direction t of the dielectric-filled space 10S.

[0059] In this case, assuming that the dielectric filled in the dielectric-filled space 10S is air, there will of course be an air layer between the multiple resonators 31 of the resonance substrate 30 and the tuning bars 41 of the frequency tuning panel 40, and there may also be an air layer with the same dielectric constant between the multiple resonators 31 and the inner surface of the filter body 10. This allows for fine frequency tuning due to slight changes in the air layer caused by the amount of shape deformation of each tuning bar 41 of the frequency tuning panel 40.

[0060] Meanwhile, in filter 1 for a communication device according to the first embodiment of the present invention, as shown in FIGS. 2A and 2B, frequency tuning panel 40 may further include notch forming portion 42 including L-notch portion 42L that protrudes and extends from the inside of the other long side 40B of the four sides (four sides) of tuning frame 40F toward one long side 40A while forming a closed loop, and C-notch portion 42C that extends to be connected to the inside of one long side 40A without forming a closed loop.

[0061] Here, the L-notch portion 42L serves to strengthen the skirt characteristics and form an L-notch due to inductive coupling at the right end of the passband, and the C-notch portion 42C serves to strengthen the skirt characteristics and form a C-notch due to capacitive coupling at the left end of the passband.

[0062] The L-notch portion 42L may be provided extending from the inside of the other long side 40B of the frequency tuning panel 40 to form a single layer identical to the tuning bar 41 described above, while at the same time forming a closed loop that does not contact the one long side 40A.

[0063] In addition, the C-notch portion 42C may be extended from the inside of the other long side 40B of the frequency tuning panel 40 or from the above-mentioned L-notch portion 42L to be connected to one long side 40A while forming the same single layer as the above-mentioned tuning bar 41.

[0064] 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.

[0065] The C-notch portion 42C and the L-notch portion 42L form an electric field (E-field) or a magnetic field (H-field) between multiple resonators 31 that are provided in a single layer and have the same shape and the same shapes of corners and bends, thereby forming the above-mentioned C-notch or L-notch on the left or right side of the passband.

[0066] On the other hand, as shown in Figures 2A and 2B, of C-notch portion 42C and L-notch portion 42L, C-notch portion 42C can be formed by extending from the inner edge of the other long side 40B of frequency tuning panel 40, or it can be formed by extending from a part of pre-formed L-notch portion 42L.

[0067] On the other hand, as mentioned above, the resonator 31 of the resonant substrate 30 and the tuning bar 41 of the frequency tuning panel 40 are required to have a structural design that ensures a minimum separation distance in order to perform fine frequency tuning by adjusting the separation distance in the thickness direction t.

[0068] To this end, the filter 1 for a communication device according to the first embodiment of the present invention may further include a spacer panel 50 that is arranged to be stacked in the thickness direction t in the dielectric-filled space 10S between the resonant substrate 30 and the frequency tuning panel 40, and that blocks direct contact between the frequency tuning panel 40 and the resonant substrate 30.

[0069] Here, the blocking of direct contact between the frequency tuning panel 40 and the resonant substrate 30 by the spacer panel 50 merely means avoiding physical spatial contact that forms a thickness to ensure a separation distance, and does not mean blocking of electrical connection.

[0070] The spacer panel 50 may be formed to correspond to the edge shapes of the tuning frame 40F of the frequency tuning panel 40 and the resonant frame 30F of the resonant substrate 30.

[0071] Such a spacer panel 50 serves to ensure the above-mentioned separation distance so that the desired passband frequency can be tuned by finely adjusting the separation distance T in the air gap that exists between the resonator 31 of the resonator substrate 30 and the tuning bar 41 of the frequency tuning panel 40.

[0072] However, the spacer panel 50 does not necessarily have to be manufactured separately and then laminated between the resonant substrate 30 and the frequency tuning panel 40. It can be integrally formed with the resonant substrate 30 so as to have different thicknesses at the upper edge portion, or conversely, it can be integrally formed with the frequency tuning panel 40 so as to have different thicknesses at the lower edge portion. It is sufficient to ensure the above-mentioned separation distance by laminating the spacer panel 50 integrally with the upper edge portion of the resonant substrate 30 and the lower edge portion of the frequency tuning panel 40 so that their thicknesses are half that of the spacer panel 50.

[0073] 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 resonator frame 30F of the resonator substrate 30 may be formed to have a thickness greater than that of the plurality of resonators 31. In this case, the mating surfaces of the tuning frame 40F and the plurality of tuning bars 41 are located at the top in the drawing, and the mating surfaces of the resonator frame 30F and the plurality of resonators 31 are located at the top and bottom in the drawing, so that an additional separation distance between the plurality of tuning bars 41 and the plurality of resonators 31 can be ensured by the spacer panel 50 described above. 1 to 4, the dielectric-filled space 10S between the filter body 10 and the filter tuning cover 20 is filled with a dielectric defined as air, and the tuning designer can perform fine frequency tuning by inserting a predetermined tuning tool (not shown) into the dielectric-filled space 10S through the bottom of the filter body 10 or the top of the filter tuning cover 20, and then pushing the tip of the resonator 31 toward the tuning bar 41 to change its shape in the thickness direction t, or by changing the shape of the tip of the tuning bar 41 toward the resonator 31 in the thickness direction t.

[0074] Here, a plurality of bottom tuning holes 12 for inserting the above-mentioned tuning tools may be formed on the lower surface of filter body 10 so as to communicate with dielectric-filled space 10S, and a plurality of upper tuning holes 22 for inserting the above-mentioned tuning tools may be formed on the upper surface of filter tuning cover 20 so as to communicate with dielectric-filled space 10S.

[0075] However, it is not necessary that the filter body 10 and the filter tuning cover 20 have both the bottom tuning hole 12 and the upper tuning hole 22; it is also possible for either one of the two to function as a tuning hole into which a tuning tool is inserted, and the other to function as a tuning correction hole for use in making corrections after tuning.

[0076] Alternatively, the filter body 10 may not be provided with the bottom tuning hole 12, and only the filter tuning cover 20 may be provided with the upper tuning hole 22 and the tuning correction hole 21. The tuning correction hole 21 may be a hole provided so that when correction is necessary after fine frequency tuning using a tuning tool, a separate tuning correction tool (not shown) can be inserted to readjust the deformed tuning bar 41.

[0077] The filter for a communication device according to the first embodiment of the present invention, configured as described above, is formed by stacking the filter body 10, the resonator substrate 30, the spacer panel 50, the frequency tuning panel 40, and the filter tuning cover 20 in order, and then connecting them together so that the dielectric-filled space 10S is closed using connecting screws (not shown) that are fastened through a plurality of threaded holes 15, 35, 55, 45, and 25 for stacking provided at each edge portion.

[0078] Here, the filter body 10, resonator substrate 30, spacer panel 50, frequency tuning panel 40, and filter tuning cover 20 may all be made of a metal material, or may be made of a predetermined dielectric material and then have their exposed portions facing the dielectric-filled space 10S coated with a metal material. As long as the exposed portions facing the dielectric-filled space 10S are coated with a metal material to form the dielectric-filled space 10S as a closed space, the lamination and connection method of the remaining components (resonator substrate 30, spacer panel 50, frequency tuning panel 40, and filter tuning cover 20) to the filter body 10 does not necessarily have to be a screw connection method, and various connection methods, including welding and adhesive connection, may be used.

[0079] Hereinafter, a specific passband frequency filtering process of the communication device filter 1 according to the first embodiment of the present invention configured as above will be described with reference to FIGS.

[0080] First, when a predetermined signal is input into the dielectric-filled space 10S via one input port 5A, the signal is transmitted sequentially in the longitudinal direction 1 through the resonators 31 of the resonant substrate 30 connected to the input coaxial connector 5A' of the input port 5A of the dielectric-filled space 10S, and is output through the resonator 31 of the resonant substrate 30 connected to the output coaxial connector 5B' of the output port 5B of the dielectric-filled space 10S.

[0081] At this time, it is possible to output only a specific band pass frequency by finely tuning the frequency by detailed design of the separation distance T in the thickness direction t between each resonator 31 and tuning bar 41.

[0082] According to the filter 1 for a communication device of the first embodiment of the present invention, the resonators 31 are arranged so as to extend in a single layer in the thickness direction t in the dielectric-filled space 10S, and the tuning bar 41 is also arranged so as to extend in a single layer in the thickness direction t in the dielectric-filled space 10S, which is different from the thickness direction t of the resonators 31. This allows the overall product to be made slim, and provides the advantages of enabling fine frequency tuning within the limits of the separation distances between the single layers in the different thickness directions t.

[0083] Hereinafter, communication device filters 100, 200, and 300 according to second to fourth embodiments, which are realized as embodiments different from the communication device filter 1 according to the first embodiment described above, will be sequentially described. However, configurations that overlap with the first embodiment (1) will be replaced with the contents already explained, and the description of each embodiment (100, 200, 300) will focus on the parts that differ from the first embodiment (1).

[0084] FIG. 5 is a perspective view showing a filter for a communication device according to a second embodiment of the present invention, and FIGS. 6A and 6B are exploded perspective views of FIG.

[0085] As shown in FIGS. 5 to 6B, in the filter 100 for a communication device according to the second embodiment of the present invention, a plurality of coupling adjustment bars 122 can be cut and formed in the filter tuning cover 120. The coupling adjustment bars 122 are deformed toward the dielectric-filled space 110S side to change the coupling value between adjacent resonators among the plurality of resonators 131.

[0086] More specifically, the multiple coupling adjustment bars 122 may be formed so as to be alternately arranged with the multiple resonators 131 in the thickness direction t of the dielectric filled space 110S.

[0087] Here, one side of each of the multiple coupling adjustment bars 122 is integrally connected to the filter tuning cover 120, and the remaining portions excluding the portion integrally connected to the filter tuning cover 120 can be cut and formed in an inverted U shape.

[0088] When a tuning technician (designer) pushes the tip of one of the multiple coupling adjustment bars 122 toward the dielectric-filled space 110S using a predetermined tool so as to achieve a desired coupling value between adjacent resonators among the multiple resonators 131, the tip of the coupling adjustment bar 122 is deformed and positioned between the adjacent resonators 131, and the tuning technician can achieve a coupling value as desired by the design value due to the specific shape of the C-notch portion 142C or L-notch portion 142L described above, as well as by each shape deformation of the coupling adjustment bar 122.

[0089] 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 partially cutaway perspective view showing the inside of a dielectric-filled space in the configuration of FIG. 7.

[0090] In the filter 1 for a communication device according to the first embodiment of the present invention, which has already been described with reference to Figures 1 to 4, the resonator 31 of the resonance substrate 30 and the tuning bar 41 of the frequency tuning panel 40 are formed to extend in the same direction (for example, from one long side 30A, 40A to the other long side 30B, 40B), but this is not necessarily limited to this.

[0091] That is, as shown in FIGS. 8A and 8B, in the filter 200 for a communication device according to the third embodiment, when the resonant frame 230F of the resonant substrate 230 has a rectangular horizontal cross section, not only can a part 231 of the resonators 231, 232 of the resonant substrate 230 be formed to extend a predetermined length from one long side 230A toward the other long side 230B, but also can the remaining part 232 of the resonators 231, 232 of the resonant substrate 230 be formed to extend a predetermined length from the other long side 230B toward the one long side 230A.

[0092] Here, among the plurality of resonators 231, 232, the adjacent resonators 231, 232 may have a length such that their tips overlap each other by a predetermined length in the width direction w of the resonant substrate 230, and may be formed to intersect in a zigzag direction in the longitudinal direction l of the resonant substrate 230 so that their mutual extension formation directions do not overlap.

[0093] Furthermore, when the tuning frame 240F of the frequency tuning panel 240 has a rectangular horizontal cross section, a portion 241 of the tuning bars 241, 242 of the frequency tuning panel 240 can be formed to extend a predetermined length from one long side 240A toward the other long side 240B, and the remaining portion 242 of the tuning bars 241, 242 of the frequency tuning panel 240 can be formed to extend a predetermined length from the other long side 240B toward the one long side 240A.

[0094] In addition, among the plurality of tuning bars 241, 242, the adjacent tuning bars 241, 242 may have a length such that their tips overlap by a predetermined distance in the width direction w of the frequency tuning panel 240, and may be formed to intersect in a zigzag direction in the longitudinal direction l of the frequency tuning panel 240 so that their mutual extension directions do not overlap.

[0095] Therefore, the resonators 231 of the resonator substrate 230 may be defined as being formed at positions corresponding to the tuning bars 241 in the longitudinal direction 1 of the resonator frame 230F.

[0096] In this case, it is sufficient that the resonators 231, 232 of the resonant substrate 230 and the tuning bars 241, 242 of the frequency tuning panel 240 are formed so as to partially overlap in the thickness direction t, and by physically dividing one dielectric-filled space 210S with the resonators 231, 232 and tuning bars 241, 242 extending in opposite directions, the effect of having multiple cavities can be achieved.

[0097] 8A and 8B, the filter 200 for a communication device according to the third embodiment may include a notch forming portion 233 that connects adjacent resonators 231 among the resonators formed extending from one long side 230A to the other long side 230B of a resonator frame 230F. The notch forming portion 233 may serve as an L-notch portion that strengthens the skirt characteristics and forms an L-notch at the right end of the passband due to inductive coupling.

[0098] This is different from the first embodiment (1), in which the frequency tuning panel 40 is provided as a single layer identical to the tuning bar 41, whereas in the third embodiment (200), a notch forming portion 233 is formed in the resonant substrate 230.

[0099] 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.

[0100] As shown in Figures 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 divide the dielectric-filled space 310S but at least partially divide the bottom portion of the dielectric-filled space 310S formed by the filter body 310.

[0101] The multiple space dividing ribs 317W may be formed to extend from the bottom surface of one long side to the bottom surface of the other long side so as to divide the inner bottom surface portion formed long in the longitudinal direction l of the filter body 310 into multiple surfaces, and may be formed in the form of a rib protruding a predetermined length from at least the bottom surface of the dielectric filling space 310S toward the filter tuning cover 320.

[0102] Such a plurality of space-dividing ribs 317W occupy a part of the dielectric-filled space 310S and separate at least the resonators 331 in a cavity form, thereby providing the advantage of being able to tune a variety of passband frequencies by adjusting the amount of coupling between adjacent resonators 331 according to the size and shape of the occupied space.

[0103] In addition, the filter body 310 can be connected so that the entire bottom surface is soldered to the main board (not shown), and the plurality of space dividing ribs 317W divide the bottom surface of the filter body 310 in the longitudinal direction l, thereby also serving to disperse and eliminate thermal stress caused by the difference in thermal expansion coefficient between the filter body 310 and the main board, which is made of PCB material.

[0104] As already explained, the communication device filters 1, 100, 200, 300 according to the embodiments of the present invention can include L-notch portions 42L, 142L, 233, 343L that realize inductive coupling and C-notch portions 42C, 142C, 343C that realize capacitive coupling by utilizing the properties of the electric field and magnetic field between each resonator 31, 131, 231, 331 provided inside the dielectric-filled space 10S, 110S, 210S, 310S, as shown in FIGS. 1 to 11B.

[0105] Inductive coupling is a type of coupling that utilizes the properties of the magnetic field around the resonators 31, 131, 231, and 331 provided in the dielectric-filled spaces 10S, 110S, 210S, and 310S. Since there is no structure between the adjacent resonators 31, 131, 231, and 331 that affects the properties of the magnetic field, this type of coupling is naturally formed between the adjacent resonators. In particular, when cross-coupling that skips the middle resonator among any three resonators 31, 131, 231, and 331 is to be realized, the provision of the above-mentioned L-notch portions 42L, 142L, 233, and 343L is particularly significant. 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 space between the tips of the adjacent resonators 31, 131, 231, 331 in the signal transmission path direction, and may have a portion closer to the resonator provided in the middle of 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 in which the resonators on both sides, excluding the resonator provided in the middle, are directly connected (see the third embodiment (200)).

[0106] On the other hand, capacitive coupling is a type of coupling that utilizes the properties of the electric field around the resonators 31, 131, 231, and 331 provided in the dielectric-filled spaces 10S, 110S, 210S, and 310S, and can be realized by a structure placed on the signal transmission path corresponding to the electric field of the adjacent resonators 31, 131, 231, and 331.

[0107] More specifically, the C-notch portions 42C, 142C, 342C realized by the first, second, and fourth embodiments extend from the other long side 40B, 140B, 340B of the frequency tuning panel 40, 140, 340 to one long side 40A, 140A, 340A, and are formed to be connected and involved with any three resonators 31, 131, 331 in the dielectric-filled space 10S, 110S, 310S. In this case, the start and end of the C-notch portions 42C, 142C, 342C can be designed to be positioned closer to any three resonators 31, 131, 331 than the middle resonator, respectively.

[0108] However, in the third embodiment (200), the C-notch portion (not shown in the drawing) is not specifically shown, but in the third embodiment (200), the resonators 231 and 232 provided on the resonant substrate 230 extend in opposite directions from one long side 230A and the other long side 230B of the resonant frame 230F, respectively, and are provided so that their tips overlap each other on the above-mentioned signal transmission path. However, it goes without saying that if necessary, they can be designed and arranged in an appropriate shape taking into account the pre-formed L-notch portion 233.

[0109]

[0023] The present invention has been described above in detail with reference to the accompanying drawings, in which:

[0024] However, the present invention is not limited to the above-described embodiments, and various modifications and variations within the scope of the present invention are possible by those skilled in the art. Therefore, the true scope of the present invention is defined by the following claims. [Industrial Applicability]

[0110] The present invention provides a filter for a communications device that includes a tuning panel having a plurality of tuning bars arranged as a single layer in the thickness direction within a dielectric-filled space, and that can perform frequency tuning by adjusting the separation distance between the tuning panel and a plurality of resonators of a resonant substrate that is arranged as a single layer different from the tuning panel in the thickness direction within the dielectric-filled space, and that includes a notch-forming portion formed as the same single layer as the tuning panel. [Explanation of symbols]

[0111] 1, 100, 200, 300: Filter, 10, 110, 210, 310: Filter body 20, 120, 220, 320: Filter tuning cover 21, 121, 221, 321: Tuning correction holes 30, 230: Resonant substrate, 31, 131, 231, 331: Resonator 40, 140, 240, 340: Frequency tuning panel 41, 141, 241, 341: Tuning bars 50: Spacer panel, 122, 222, 322: Coupling adjustment bar

Claims

1. a filter body having an opening in a thickness direction and forming a part of a dielectric-filled space therein; a filter tuning cover coupled to the filter body through a thickness thereof and opening over the filter body to define the remainder of the dielectric filling space; a frequency tuning panel including a tuning frame having a plurality of tuning bars arranged in a single layer in a thickness direction within the dielectric-filled space so as to adjust a separation distance between the tuning frame and the plurality of resonators arranged within the dielectric-filled space; a resonator substrate including a resonator frame arranged in the dielectric-filled space so that the plurality of resonators form a single layer in a thickness direction thereof, The frequency tuning panel is disposed in the dielectric-filled space in a thickness direction as a single layer separate from the plurality of resonators of the resonant substrate.

2. If the tuning frame has a rectangular horizontal cross section, The plurality of tuning bars include:

2. The filter for a communication device according to claim 1, wherein a portion of the filter is formed to extend a predetermined length from one of the four long sides of the tuning frame (hereinafter referred to as "one long side") toward another of the four long sides (hereinafter referred to as "the other long side"), and the remainder is formed to extend a predetermined length from the other long side of the tuning frame toward the one long side.

3. 3. The filter for a communication device according to claim 2, wherein the tips of adjacent tuning bars among the plurality of tuning bars have a length such that they overlap within a predetermined range in the width direction of the frequency tuning panel.

4. 4. The filter for a communication device according to claim 3, wherein adjacent ones of the plurality of tuning bars are formed to intersect in a zigzag direction in the longitudinal direction of the frequency tuning panel so that their extending directions do not overlap.

5. 3. The filter for a communication device according to claim 2, wherein the plurality of resonators of the resonator substrate are formed at positions corresponding to the plurality of tuning bars in the longitudinal direction of the resonator frame.

6. 6. The filter for a communication device according to claim 5, wherein the dielectric-filled space is a closed space having a thickness smaller than the dimensions in the longitudinal and width directions.

7. the plurality of tuning bars are integrally formed with the tuning frame; 6. The filter for a communication device according to claim 5, wherein the plurality of resonators are integrally formed on the resonator frame.

8. 6. The filter for a communication device according to claim 5, wherein the plurality of resonators have different lengths extending toward the other long side or the one long side.

9. 6. The filter for a communication device according to claim 5, wherein a tip of each of the plurality of resonators is spaced apart from the other long side when it extends from the one long side to the other long side, and is spaced apart from the one long side when it extends from the other long side to the one long side.

10. 6. The filter for a communication device according to claim 5, further comprising a spacer panel disposed in the dielectric-filled space between the frequency tuning panel and the resonant substrate so as to be stacked in a thickness direction thereof, to block direct contact between the frequency tuning panel and the resonant substrate.

11. 11. The filter for a communication device according to claim 10, wherein the spacer panel is formed to correspond to edge shapes of a tuning frame of the frequency tuning panel and a resonator frame of the resonator substrate.

12. 6. The filter for a communication device according to claim 5, wherein a plurality of space-dividing ribs are integrally formed on an inner surface of the filter body in a thickness direction, the space-dividing ribs projecting from the inner surface so as to divide a portion of the dielectric-filled space and separate the plurality of resonators of the resonance substrate.

13. 6. The filter for a communication device according to claim 5, wherein the filter tuning cover is formed with a plurality of tuning holes for pushing the plurality of tuning bars with a predetermined tool.

14. 6. The filter for a communication device according to claim 5, wherein a plurality of coupling adjustment bars are formed by incisions in the filter tuning cover, the coupling adjustment bars being deformed toward the dielectric-filled space to change a coupling value between adjacent resonators among the plurality of resonators.

15. 15. The filter for a communication device according to claim 14, wherein the plurality of coupling adjustment bars are arranged alternately with the plurality of resonators in the thickness direction of the dielectric-filled space.

16. 6. The filter for a communication device according to claim 5, wherein the resonant substrate further includes an L-notch portion that realizes inductive coupling by utilizing the properties of a magnetic field between the plurality of resonators inside the dielectric-filled space.

17. 17. The filter for a communication device of claim 16, wherein the L-notch portion is configured to interconnect adjacent resonators among the resonators formed by extending from the other long side to the one long side among four sides of the resonator frame.

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