Filters 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 (including all "communication devices") such as a radio frequency filter 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. 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 cavities are used to form a plurality of resonance stages, and the plurality of resonance stages have a multi-stage structure connected sequentially.

[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 desired band-pass characteristics, 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] Furthermore, conventional radio frequency filters are designed to enhance the skirt characteristics between adjacent or spaced-out resonators within multiple cavities, and require the addition of conductive material to achieve inductive or capacitive coupling. However, this also leads to the problem of significantly increasing the weight of the finished filter. [Overview of the project] [Problems that the invention aims to solve]

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

[0007] In addition, the present invention also aims to provide a filter for communication equipment that can perform frequency tuning by adjusting the separation distance between multiple resonators of a resonant substrate arranged as a single layer different from the tuning panel in the thickness direction within a dielectric-filled space.

[0008] Another objective is to provide a filter for communication equipment that includes a notch-forming section formed as a single layer identical to 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 communication equipment according to one embodiment of the present invention includes a frequency tuning panel equipped with a plurality of tuning bars arranged as a single layer in the thickness direction within a dielectric-filled space to adjust the distance between the plurality of resonators arranged within the dielectric-filled space.

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

[0012] Furthermore, the frequency tuning panel may include a tuning frame having a rectangular border, and a plurality of tuning bars extending from the inside of one of the four longer sides of the tuning frame toward the other longer side.

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

[0014] Furthermore, the plurality of tuning bars may be provided at predetermined distances apart in the longitudinal direction.

[0015] Furthermore, the plurality of tuning bars may be arranged at positions that are separated in the longitudinal direction so as to match the plurality of resonators, which are arranged at intervals in the thickness direction within the dielectric-filled space.

[0016] Furthermore, the lengths of the multiple tuning bars extending toward the other longer side may differ.

[0017] Furthermore, the frequency tuning panel may further include notch-forming portions that protrude from the inside of one of the four sides of the tuning frame, forming a closed loop towards the other side, or that extend to connect to the inside of the other side without forming a closed loop.

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

[0019] Furthermore, the L-notch portion can achieve cross-coupling through the properties of the magnetic field between any three adjacent resonators within the dielectric-filled space.

[0020] Further, the C-notch portion can realize cross-coupling according to 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] Moreover, 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 another long side, and at least the plurality of tuning bars may be arranged to overlap a predetermined length in the thickness direction.

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

[0024] Also, 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] Moreover, 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] In addition, 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 an attachment space for laminating the resonance substrate and the frequency tuning panel therein, and a filter tuning cover that forms the rest of the dielectric-filled space while covering the one open side in the thickness direction of the filter body can be further included.

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

[0030] Also, on the filter tuning cover, 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 formed by cutting.

[0031] Further, the plurality of coupling adjustment bars may be alternately arranged with the plurality of resonators with respect to 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 respectively 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] Secondly, since the notch forming section is provided to form the same single layer as the multiple tuning bars of the frequency tuning panel or the same single layer as the resonator of the resonant substrate, no additional parts are required for the skirt characteristics, thus preventing an increase in the weight of the product and facilitating lightweight design. [Brief explanation of the drawing]

[0035] [Figure 1] This is a perspective view showing a filter for communication equipment according to a first embodiment of the present invention. [Figure 2A] Figure 1 is an exploded perspective view. [Figure 2B] Figure 1 is an exploded perspective view. [Figure 3] Figure 1 shows an exploded perspective view and a partial enlarged view of the resonator of the resonant substrate and the tuning bar of the frequency tuning panel, as part of the configuration shown in Figure 1. [Figure 4] Figure 1 is a partially cut-out perspective view showing the interior of the dielectric-filled space within the configuration of Figure 1. [Figure 5] This is a perspective view showing a filter for communication equipment according to a second embodiment of the present invention. [Figure 6A] Figure 5 is an exploded perspective view. [Figure 6B] Figure 5 is an exploded perspective view. [Figure 7] This is a perspective view showing a filter for communication equipment according to a third embodiment of the present invention. [Figure 8A] Figure 7 is an exploded perspective view. [Figure 8B] Figure 7 is an exploded perspective view. [Figure 9] Figure 7 is a partially cut perspective view showing the interior of the dielectric-filled space in the configuration. [Figure 10] This is a perspective view showing a filter for communication equipment according to a fourth embodiment of the present invention. [Figure 11A] Figure 10 is an exploded perspective view. [Figure 11B] Figure 10 is an exploded perspective view. [Modes for carrying out the invention]

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

[0037] When assigning reference numerals to the components in each drawing, it should be noted that, as far as possible, identical components should have the same reference numeral even if they are shown in other drawings. Furthermore, when describing embodiments of the present invention, if it is determined that a specific description of such known configurations or functions would hinder understanding of the embodiments of the present invention, such detailed description will be omitted.

[0038] In describing the components of the embodiments of the present invention, terms such as First, Second, A, B, (a), (b), etc., may be used. Such terms are merely for distinguishing a component from other components, and do not limit the nature, order, or procedure of that component. Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the art to which the present invention pertains. Terms as defined in commonly used dictionaries should be interpreted as having the meaning consistent with their meaning in the context of the relevant art, and not in an ideal or overly formal sense unless explicitly defined in this application.

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

[0040] 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 explanation will be based on the premise that air fills the dielectric-filled spaces 10S, 110S, 210S, and 310S as a dielectric. In this way, when air is used as a dielectric, it would mean that unless the dielectric-filled spaces 10S, 110S, 210S, and 310S are in a sealed vacuum state, the dielectric air will naturally fill the dielectric-filled spaces 10S, 110S, 210S, and 310S, which consist of empty spaces, without any other dielectric-filling process.

[0041] The communication equipment filters according to the present invention will be described in detail below for each embodiment.

[0042] Figure 1 is a perspective view showing a filter for communication equipment according to a first embodiment of the present invention; Figures 2A and 2B are exploded perspective views of Figure 1; Figure 3 is an exploded perspective view and a partially enlarged view thereof showing the resonator of the resonant substrate and the tuning bar of the frequency tuning panel in the configuration of Figure 1; and Figure 4 is a partially cut perspective view showing the interior of the dielectric filling space in the configuration of Figure 1.

[0043] A filter 1 for communication equipment according to a first embodiment of the present invention, as shown in Figures 1 to 4, may include a filter body 10, a filter tuning cover 20 coupled to the filter body 10 to form the dielectric filling space 10S, a resonant 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] 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 less than the magnitudes of the longitudinal direction l and the width direction w, as shown in Figures 2A and 2B.

[0045] Here, a portion of the dielectric-filled space 10S can form the open one-side space of the filter body 10, and the remainder of the dielectric-filled space 10S can form the other-side space of the filter tuning cover 20.

[0046] To form such a dielectric filling space 10S, the filter body 10 may be provided in a form in which one side surface to which the filter tuning cover 20 is coupled is recessed to a predetermined depth in the direction facing the other side surface (up and down in the drawing), and the inner surface of the filter tuning cover 20 may also be provided in a form in which it is recessed to a predetermined depth in the opposite direction (up and down in the drawing).

[0047] A dielectric having a predetermined dielectric constant can be filled into the dielectric-filled space 10S. As explained earlier, air is also a type of dielectric having a predetermined dielectric constant. Therefore, in the first embodiment of the present invention (the second to fourth embodiments described later are all the same), the explanation will be based on the premise that air is the dielectric filling the space.

[0048] On the other hand, the filter body 10 can have input port holes 17h and output port holes 17h formed through to communicate with the dielectric-filled space 10S, to which input ports 5A and output ports 5B for inputting a predetermined signal to one side of the resonant substrate 30 (described later) are fixed.

[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 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 may be possible using any electrical connection configuration, such as pins, as long as it is a conductive medium provided on the main board (not shown).

[0050] The resonant substrate 30 is arranged as a single layer in the thickness direction t within the dielectric-filled space 10S, and multiple resonators 31 are also formed as single layers, and may include a resonant frame 30F having a rectangular edge.

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

[0052] For the sake of understanding, the following explanation assumes that the resonant frame 30F is formed by cutting a rectangle in the middle and connecting it vertically, and is formed as a long rectangle from left to right in the schematic diagrams 2A and 2B. Furthermore, the left and right ends in the longitudinal direction will be referred to as the "short sides" because their side lengths are relatively small, and the front and rear ends in the width direction will be referred to as the "long sides" because their side lengths are relatively large.

[0053] Here, the multiple resonators 31 can be formed to extend a predetermined length from one of the four long sides 30A of the resonant frame 30F toward another long side 30B, as shown in Figures 2A and 2B.

[0054] However, it is preferable that the multiple resonators 31 are formed at a distance from each other such that their tips are not connected to the inner edge of the other long side 30B described above.

[0055] Furthermore, the multiple resonators 31 may be formed such that their tips are at the same distance from the inner edge of another long side 30B. However, the extension points of each of the multiple resonators 31 do not all have to be the same; they can be designed to have different extension points based on the frequency band pass characteristics required by the designer. That is, the extension point of each of the multiple resonators 31 corresponds 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 point of the adjacent resonator 31.

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

[0057] More specifically, the frequency tuning panel 40 may include a tuning frame 40F having a rectangular border, and a plurality of tuning bars 41 extending from the inside of one long side 40A to the other long side 40B of the four sides (four edges) of the tuning frame 40F.

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

[0059] Such a frequency tuning panel 40 may be arranged in the dielectric-filled space 10S as a single layer distinct from the multiple resonators 31 in the thickness direction t, so that the multiple tuning bars 41 adjust the distance between them and the multiple resonators 31 arranged in the dielectric-filled space 10S (see "T" in Figure 3).

[0060] Here, the multiple 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 positioned at a distance in the longitudinal direction l so as to match with a plurality of resonators 31 that are spaced apart in the thickness direction t within the dielectric filling space 10S.

[0061] On the other hand, unlike the multiple resonators 31 described above, where the extension points of the multiple tuning bars 41 differ, the extension points on the inside of one long side 40A of the tuning frame 40F can all be set to the inner edge corresponding to one long side 40A of the tuning frame 40F, which is on the same line.

[0062] Furthermore, while the tips of the multiple tuning bars 41 extend so that they have the same separation distance as the tips of the multiple resonators 31 described above, the lengths of the tips extending toward the other long side 40B can be set to be the same or different.

[0063] However, in this case, the configuration is such that the multiple tuning bars 41 perform fine frequency tuning by adjusting the separation distance T between them and the multiple resonators 31 which are arranged as different single layers in the dielectric-filled space 10S. Therefore, it is preferable that the multiple resonators 31 or the multiple tuning bars 41 are designed to overlap by a predetermined length in the thickness direction t of the dielectric-filled space 10S.

[0064] In this case, assuming that the dielectric filling space 10S is air, an air layer exists not only between the multiple resonators 31 of the resonant substrate 30 and the tuning bars 41 of the frequency tuning panel 40, but also between the multiple resonators 31 and the inner surface of the filter body 10. This allows for fine frequency tuning through minute changes in the air layer due to the amount of shape deformation of each tuning bar 41 of the frequency tuning panel 40.

[0065] On the other hand, in the first embodiment of the present invention, the filter 1 for communication equipment, as shown in Figures 2A and 2B, the frequency tuning panel 40 may further include a notch forming portion 42 which includes an L-notch portion 42L that extends outward from the inside of the other long side 40B of the tuning frame 40F, forming a closed loop towards the one long side 40A, and a C-notch portion 42C that extends to connect to the inside of the one long side 40A without forming a closed loop.

[0066] Here, the L-notch section 42L enhances the skirt characteristics and forms an L-notch at the right end of the passband by inductive coupling, while the C-notch section 42C enhances the skirt characteristics and forms a C-notch at the left end of the passband by capacitive coupling.

[0067] The L-notch portion 42L may be extended from the inside of the other long side 40B of the frequency tuning panel 40 to form a closed loop that is the same single layer as the tuning bar 41 described above, while simultaneously not in contact with the one long side 40A.

[0068] 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 L-notch portion 42L described above, forming the same single layer as the tuning bar 41 described above, and connected to the one long side 40A.

[0069] Here, the C-notch portion 42C differs 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 section 42C and the L-notch section 42L each form an electric field (E-field) or magnetic field (H-field) between multiple resonators 31 provided within a single layer, which have the same shape and the same shape of corners and bends, thereby forming the aforementioned C-notch or L-notch on the left or right side of the passband.

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

[0072] On the other hand, as described above, the resonator 31 of the resonant substrate 30 and the tuning bar 41 of the frequency tuning panel 40 require a structural design that ensures the minimum possible isolation distance, as fine frequency tuning is performed by adjusting the isolation distance in the thickness direction t.

[0073] For this purpose, the filter 1 for communication equipment 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 filling space 10S between the resonant substrate 30 and the frequency tuning panel 40, thereby blocking direct contact between the frequency tuning panel 40 and the resonant substrate 30.

[0074] Here, the fact that the spacer panel 50 blocks direct contact between the frequency tuning panel 40 and the resonant substrate 30 simply means avoiding physical spatial contact, which is formed by ensuring a separation distance, and does not mean blocking electrical connection.

[0075] The spacer panel 50 may be formed to correspond to the edge shape of the tuning frame 40F of the frequency tuning panel 40 and the resonant frame 30F of the resonant substrate 30.

[0076] Such a spacer panel 50 has an air layer between the resonator 31 of the resonant substrate 30 and the tuning bar 41 of the frequency tuning panel 40, and plays the role of ensuring the aforementioned isolation distance so that the desired passband frequency can be tuned by fine-tuning the separation distance T in this air layer.

[0077] However, the spacer panel 50 does not necessarily have to be manufactured separately and laminated between the resonant substrate 30 and the frequency tuning panel 40. It can be integrally formed with the upper edge of the resonant substrate 30 so as to have a different thickness, or conversely, integrally formed with the lower edge of the frequency tuning panel 40 so as to have a different thickness. It is sufficient to secure the aforementioned isolation distance by integrally forming and laminating the upper edge of the resonant substrate 30 and the lower edge of the frequency tuning panel 40 so that their thicknesses differ by half each from the thickness of the spacer panel 50.

[0078] In other words, the tuning frame 40F of the frequency tuning panel 40 may be formed to have a greater thickness than the plurality of tuning bars 41, and the resonant frame 30F of the resonant substrate 30 may be formed to have a greater thickness than the plurality of resonators 31. In this case, the surface on which the tuning frame 40F and the plurality of tuning bars 41 are matched is located at the top of the drawing, and the surface on which the resonant frame 30F and the plurality of resonators 31 are matched is located at the bottom of the drawing, thereby additionally securing the isolation distance that separates the plurality of tuning bars 41 and the plurality of resonators 31 by the spacer panel 50 described above. In addition, as shown in Figures 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 by air. After the designer performing the tuning inserts a predetermined tuning tool (not shown) into the dielectric-filled space 10S via the bottom of the filter body 10 or the top of the filter tuning cover 20, they can push the tip of the resonator 31 to change its shape in the thickness direction t toward the tuning bar 41, or change the shape of the tip of the tuning bar 41 in the thickness direction t toward the resonator 31, to perform fine frequency tuning.

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

[0080] However, the filter body 10 and the filter tuning cover 20 do not necessarily have both a bottom tuning hole 12 and an upper tuning hole 22. One of the two can function as a tuning hole into which the original tuning tool is inserted, while the other functions as a tuning correction hole for correcting tuning after it has been done.

[0081] Furthermore, the filter body 10 may not have a bottom tuning hole 12, and only the filter tuning cover 20 may have an upper tuning hole 22 and a tuning correction hole 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 needed after fine frequency tuning using a tuning tool.

[0082] In the first embodiment of the present invention, a filter for communication equipment having the above configuration, the filter body 10, resonant substrate 30, spacer panel 50, frequency tuning panel 40, and filter tuning cover 20 are sequentially stacked and coupled together using coupling screws (not shown) that are fastened through a plurality of stacking coupling screw holes 15, 35, 55, 45, 25 provided at each edge, so as to close the dielectric filling space 10S.

[0083] Here, the filter body 10, resonant substrate 30, spacer panel 50, frequency tuning panel 40, and filter tuning cover 20 may all be made of metal, or they may be made of a predetermined dielectric material and then formed so that all parts exposed to the dielectric filling space 10S are coated with metal. Insofar as the parts exposed to the dielectric filling space 10S are coated with metal and the dielectric filling space 10S can be formed as a closed space, the lamination coupling method of the remaining components (resonant 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 coupling method, and various coupling methods including welding and adhesive coupling methods may be applied.

[0084] The following describes a specific passband frequency filtering process for the first embodiment of the present invention, which is configured as described above, with reference to Figures 3 and 4.

[0085] First, when a predetermined signal is input to the dielectric-filled space 10S via one input port 5A, it is sequentially transmitted in the longitudinal direction l through the resonator 31 of the resonant substrate 30 connected via the input coaxial connector 5A' of the input port 5A within the dielectric-filled space 10S, and then output through the resonator 31 of the resonant substrate 30 connected to the output coaxial connector 5B' of the output port 5B within the dielectric-filled space 10S.

[0086] At this time, by fine-tuning the separation distance T in the vertical thickness direction between each resonator 31 and the tuning bar 41, it is possible to output only a specific bandpass frequency through precise frequency tuning.

[0087] In this case, according to the first embodiment of the present invention, the filter 1 for communication equipment is provided such that the extension direction of the resonator 31 forms a single layer in the dielectric filling space 10S with respect to the thickness direction t, and the extension direction of the tuning bar 41 is also provided such that the extension direction of the tuning bar 41 forms a single layer in the dielectric filling space 10S with respect to a different thickness direction t than that of the resonator 31. This makes it possible to manufacture the overall product with a slim thickness and provides the advantage of enabling fine frequency tuning within the limits of the isolation distance of each single layer in the different thickness directions t mentioned above.

[0088] The following describes, in order, the second to fourth embodiments of communication equipment filters 100, 200, and 300, which are implemented in embodiments different from the first embodiment of communication equipment filter 1 described above. However, any configurations that overlap with the first embodiment (1) will be replaced with the content already described, and each embodiment (100, 200, 300) will be described focusing on the parts that differ from the first embodiment (1).

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

[0090] In the second embodiment of the present invention, the filter 100 for communication equipment, as shown in Figures 5 to 6B, has a filter tuning cover 120 into which multiple coupling adjustment bars 122 can be cut and formed, which are deformed in shape toward the dielectric filling space 110S side to change the coupling value between adjacent resonators among the multiple resonators 131.

[0091] 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 filling space 110S.

[0092] Here, each of the multiple coupling adjustment bars 122 is integrally connected to the filter tuning cover 120 on one side, and the remaining portion, excluding the portion integrally connected to the filter tuning cover 120, can be cut open in an inverted U-shape.

[0093] When a tuning operator (designer) between adjacent resonators among multiple resonators 131 pushes the tip of one of the multiple coupling adjustment bars 122 toward the dielectric filling space 110S using a predetermined tool, the tip of the coupling adjustment bar 122 is deformed and positioned between the adjacent resonators 131. In addition to the design value based on the specific shape of the C-notch portion 142C or L-notch portion 142L described above, the tuning operator can achieve the desired coupling value according to the design value by deforming the shape of each coupling adjustment bar 122.

[0094] Figure 7 is a perspective view showing a filter for communication equipment according to a third embodiment of the present invention, Figures 8A and 8B are exploded perspective views of Figure 7, and Figure 9 is a partially cut-out perspective view showing the interior of the dielectric filling space in the configuration of Figure 7.

[0095] In the first embodiment of the present invention, a filter 1 for communication equipment, as already described with reference to Figures 1 to 4, the resonator 31 of the resonant 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 the invention is not necessarily limited to this.

[0096] In other words, as shown in Figures 8A and 8B, in the third embodiment of the communication equipment filter 200, if the resonant frame 230F of the resonant substrate 230 has a rectangular horizontal cross-section, it is possible to form a portion 231 of the resonators 231 and 232 of the resonant substrate 230 so as to extend a predetermined length from one long side 230A to the other long side 230B, and the remaining portion 232 of the resonators 231 and 232 of the resonant substrate 230 so as to extend a predetermined length from the other long side 230B to the one long side 230A.

[0097] Here, among the multiple resonators 231 and 232, adjacent resonators 231 and 232 may have a length at which their respective tips overlap by a predetermined length in the width direction w of the resonant substrate 230, and may be formed so as to intersect in a zigzag direction in the longitudinal direction l of the resonant substrate 230 so as not to overlap in their mutual extension formation directions.

[0098] Furthermore, if the tuning frame 240F of the frequency tuning panel 240 has a rectangular horizontal cross-section, it is possible that a portion 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, and 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.

[0099] In addition, among the multiple tuning bars 241, 242, adjacent tuning bars 241, 242 may have a length at which their respective ends overlap by a predetermined length 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 formation directions do not overlap.

[0100] In this case, it is sufficient that the resonators 231 and 232 of the resonant substrate 230 and a portion of the tuning bars 241 and 242 of the frequency tuning panel 240 overlap in the thickness direction t. By physically dividing a single dielectric-filled space 210S with the resonators 231 and 232 and the tuning bars 241 and 242, which extend in opposite directions, the effect of having multiple cavities can be provided.

[0101] In addition, the third embodiment of the communication equipment filter 200 may be provided with a notch forming portion 233 that interconnects adjacent resonators 231 among resonators that are extended from one long side 230A to the other long side 230B of the resonant frame 230F, as shown in Figures 8A and 8B. Here, the notch forming portion 233 can play the role of an L-notch portion that enhances the skirt characteristics and forms an L-notch at the right end of the passband by inductive coupling.

[0102] This differs from the first embodiment (1), in which the frequency tuning panel 40 is provided with the same single layer as the tuning bar 41, in the third embodiment (200), in which a notch forming portion 233 is formed on the resonant substrate 230.

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

[0104] The fourth embodiment of the present invention, as shown in Figures 10 to 11B, is a filter 300 for communication equipment that does not completely partition the dielectric-filled space 310S, but may further include a plurality of space-dividing ribs 317W that partition at least a portion of the bottom surface of the dielectric-filled space 310S formed by the filter body 310.

[0105] The multiple spatial division ribs 317W are formed to divide the inner bottom surface portion, which is long in the longitudinal direction l of the filter body 310, into multiple surfaces, extending from the bottom surface on one long side to the bottom surface on the other long side, and may be formed in the form of ribs that protrude for a predetermined length from at least the bottom surface of the dielectric filling space 310S toward the filter tuning cover 320.

[0106] Since these multiple spatial division ribs 317W occupy a portion of the dielectric-filled space 310S and separate at least the resonators 331 in a cavity form, they offer the advantage of enabling tuning of a wide range of passband frequencies by adjusting the amount of coupling between adjacent resonators 331 according to the size and shape of the occupied space.

[0107] In addition, the filter body 310 can be joined to the main board (not shown) by soldering its entire bottom surface to it. The multiple spatial division ribs 317W divide the bottom surface of the filter body 310 in the longitudinal direction l, thereby dispersing and eliminating thermal stress caused by the difference in thermal expansion coefficients between the filter body 310 and the main board, which is made of PCB material.

[0108] As previously explained, the communication equipment filters 1, 100, 200, and 300 according to embodiments of the present invention, as shown in Figures 1 to 11B, can include L-notch sections 42L, 142L, 233, and 343L that realize inductive coupling and C-notch sections 42C, 142C, and 343C that realize capacitive coupling by utilizing the properties of the electric and magnetic fields between the resonators 31, 131, 231, and 331 provided inside the dielectric-filled spaces 10S, 110S, 210S, and 310S, respectively.

[0109] Inductive coupling is a type of coupling that utilizes the properties of the magnetic field around resonators 31, 131, 231, and 331 provided in dielectric-filled spaces 10S, 110S, 210S, and 310S. As long as there are no structures between adjacent resonators 31, 131, 231, and 331 that affect the properties of the magnetic field, the coupling is formed naturally between them. In particular, when realizing cross-coupling that bypasses the resonator in the middle of any three resonators 31, 131, 231, and 331, the presence of the aforementioned L-notch sections 42L, 142L, 233, and 343L becomes even more significant. In the case of the communication equipment filters 1, 100, 200, and 300 according to embodiments of the present invention, the L-notch sections 42L, 142L, 233, and 343L are provided such that they do not obstruct the signal transmission path between the tips of adjacent resonators 31, 131, 231, and 331, and are located closer to any three resonators 31, 131, 231, and 331 than the resonator located in the middle (see Embodiment 1 (1), Embodiment 2 (100), and Embodiment 4 (300)), or they may be provided in a form that directly connects the resonators on both sides excluding the resonator located in the middle (see Embodiment 3 (200)).

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

[0111] More specifically, the C-notch sections 42C, 142C, and 342C realized by the first, second, and fourth embodiments extend and connect from the other long sides 40B, 140B, and 340B of the frequency tuning panels 40, 140, and 340 to the one long side 40A, 140A, and 340A, and are formed to engage with any three resonators 31, 131, and 331 of the dielectric filling spaces 10S, 110S, and 310S, in which case the starting and ending points of the C-notch sections 42C, 142C, and 342C can be designed to be closer to the intermediate resonator among the any three resonators 31, 131, and 331, respectively.

[0112] However, in the third embodiment (200), the C-notch portion (not indicated by a reference numeral in the drawing) is not specifically shown. 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 such that their ends overlap each other on the signal transmission path described above. Needless to say, if necessary, the design and arrangement can be made in an appropriate shape considering the pre-formed L-notch portion 233.

[0113] The filters for communication equipment according to embodiments of the present invention have been described in detail above with reference to the attached drawings. However, the embodiments of the present invention are not necessarily limited to those described above, and it goes without saying that various modifications and equivalent implementations are possible by persons with ordinary skill in the art to which the present invention pertains. Therefore, the true scope of the rights of the present invention is defined by the claims described later. [Industrial applicability]

[0114] The present invention provides a filter for communication equipment that includes a tuning panel comprising a plurality of tuning bars arranged as a single layer in the thickness direction within a dielectric-filled space, and which allows frequency tuning to be performed by adjusting the separation distance between the tuning panel and a plurality of resonators of a resonant substrate arranged as a single layer different from the tuning panel in the thickness direction within the dielectric-filled space, and which includes a notch forming portion formed as the same single layer as the tuning panel. [Explanation of Symbols]

[0115] 1, 100, 200, 300: Filter; 10, 110, 210, 310: Filter body 20, 120, 220, 320: Filter tuning cover 21, 121, 221, 321: Tuning adjustment 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 for communication equipment, comprising a frequency tuning panel having a plurality of tuning bars arranged as a single layer in the thickness direction within a dielectric-filled space to adjust the distance in the thickness direction between the dielectric-filled space and a plurality of resonators arranged within the dielectric-filled space.

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

3. The frequency tuning panel is A tuning frame with a rectangular border, A filter for communication equipment according to claim 1, comprising: a plurality of tuning bars extending from the inside of one long side of the four sides of the tuning frame toward the other long side.

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

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

6. The filter for communication equipment according to claim 3, wherein the plurality of tuning bars are arranged longitudinally apart at positions that match each of the plurality of resonators arranged at intervals in the thickness direction within the dielectric-filled space.

7. The filter for communication equipment according to claim 3, wherein each of the plurality of tuning bars has a different length extending to the other long side.

8. A frequency tuning panel comprising a plurality of tuning bars arranged as a single layer in the thickness direction within a dielectric-filled space to adjust the distance between a plurality of resonators arranged within the dielectric-filled space, The frequency tuning panel is A tuning frame with a rectangular border, The tuning frame includes a plurality of tuning bars extending from the inside of one long side to the other long side of the four sides of the tuning frame, The frequency tuning panel is A filter for communication equipment, further comprising a notch-forming portion that extends outward from the inside of one of the four sides of the tuning frame, forming a closed loop, towards the other side, or that extends to connect to the inside of the other side without forming a closed loop.

9. The notch forming portion is, The L-notch portion that forms the closed loop, The filter for communication equipment according to claim 8, comprising a C-notch portion that does not form the closed loop.

10. The L-notch portion achieves cross-coupling by the properties of the magnetic field between any three adjacent resonators in the dielectric-filled space, as described in claim 9, for a communication equipment filter.

11. The filter for communication equipment according to claim 9, wherein the C-notch portion achieves cross-coupling by the properties of the electric field between any three adjacent resonators in the dielectric-filled space.

12. A frequency tuning panel comprising a plurality of tuning bars arranged as a single layer in the thickness direction within a dielectric-filled space to adjust the distance between a plurality of resonators arranged within the dielectric-filled space, The resonant substrate further includes a resonant frame having a rectangular edge, which is disposed as a single layer in the thickness direction within the dielectric-filled space, and which has a plurality of resonators formed as the single layer, The aforementioned plurality of resonators are, A filter for communication equipment, formed to extend a predetermined length from one of the four long sides of the resonant frame toward another long side, and arranged to overlap at least the plurality of tuning bars by a predetermined length in the thickness direction.

13. The filter for communication equipment according to claim 12, wherein the plurality of resonators extend at a distance from the other long side.

14. A frequency tuning panel comprising a plurality of tuning bars arranged as a single layer in the thickness direction within a dielectric-filled space to adjust the distance between a plurality of resonators arranged within the dielectric-filled space, The resonant substrate further includes a resonant frame having a rectangular edge, which is disposed as a single layer in the thickness direction within the dielectric-filled space, and which has a plurality of resonators formed as the single layer, A filter for communication equipment, further comprising spacer panels arranged to be stacked in the thickness direction in the dielectric-filled space between the frequency tuning panel and the resonant substrate, thereby blocking direct contact between the frequency tuning panel and the resonant substrate.

15. The filter for communication equipment according to claim 14, wherein the spacer panel is formed to correspond to the edge shape of the tuning frame of the frequency tuning panel and the resonant frame of the resonant substrate.

16. A frequency tuning panel comprising a plurality of tuning bars arranged as a single layer in the thickness direction within a dielectric-filled space to adjust the distance between a plurality of resonators arranged within the dielectric-filled space, The resonant substrate further includes a resonant frame having a rectangular edge, which is disposed as a single layer in the thickness direction within the dielectric-filled space, and which has a plurality of resonators formed as the single layer, The frequency tuning panel includes a tuning frame having a thickness greater than the plurality of tuning bars. The resonant substrate includes a resonant frame having a thickness greater than that of the plurality of resonators, and is a filter for communication equipment.

17. A frequency tuning panel comprising a plurality of tuning bars arranged as a single layer in the thickness direction within a dielectric-filled space to adjust the distance between a plurality of resonators arranged within the dielectric-filled space, The resonant substrate further includes a resonant frame having a rectangular edge, which is disposed as a single layer in the thickness direction within the dielectric-filled space, and which has a plurality of resonators formed as the single layer, A filter body is provided with an opening formed on one side in the thickness direction of the dielectric filling space, and which forms a part of the dielectric filling space and has a mounting space for stacking the resonant substrate and the frequency tuning panel inside, The filter further includes a filter tuning cover that covers one open side of the filter body in the thickness direction while forming the remaining dielectric-filled space, A filter for communication equipment, wherein a plurality of spatial division ribs are integrally formed on the inner surface of the filter body in the thickness direction, dividing a portion of the dielectric packing space and separating the plurality of resonators of the resonant substrate.

18. The filter for communication equipment according to claim 17, wherein the filter tuning cover has a plurality of tuning holes formed therein for pushing the plurality of tuning bars using a predetermined tool.

19. The filter for communication equipment according to claim 17, wherein the filter tuning cover has a plurality of coupling adjustment bars cut into it, which are deformed in shape toward the dielectric-filled space side to change the coupling value between adjacent resonators among the plurality of resonators.

20. The filter for communication equipment according to claim 19, wherein the plurality of coupling adjustment bars are arranged alternately with the plurality of resonators in the thickness direction of the dielectric filling space.

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