Filter for communication device

Abstract

The present invention relates to a filter for a communication device, and more particularly, to a filter for a communication device, comprising: a filter body which is open in the thickness direction and in which a part of a dielectric filling space is formed; a filter tuning cover coupled in a thickness direction of the opening to cover the filter body and to form a remaining portion of the dielectric filling space; a resonance substrate including a resonance frame in which a plurality of resonators are disposed so that the plurality of resonators form a single layer in the thickness direction in the dielectric filling space; a frequency tuning panel including a tuning frame in which a plurality of tuning rods are disposed, the plurality of tuning rods being disposed in a single layer with respect to a thickness direction in the dielectric filled space to adjust a distance spaced apart from the plurality of resonators disposed in the dielectric filled space; and a spacing part which is formed in a step shape and is integrated with any one of the filter tuning cover and the frequency tuning panel.

Description

Technical Field

[0001] The present invention relates to a filter for communication equipment, and more particularly to a filter for communication equipment that can be manufactured to be thin while achieving weight reduction. Background Art

[0002] A wireless radio frequency device such as a wireless frequency filter (all of which are included in the "communication equipment") is usually composed of a connection structure of multiple resonators. This resonator is a circuit element that resonates at a specific frequency through a combination of an inductor L and a capacitor C in an equivalent circuit. Each resonator has a structure in which a dielectric resonant element (DR) or a metal resonant element is arranged inside a cavity such as a metal cylinder or a rectangular hexahedron surrounded by a conductor. Accordingly, each resonator has a structure in which only the natural frequency of the processing frequency band exists in the cavity, thereby achieving high-frequency resonance. Usually, multiple resonant ends are formed by using multiple cavities, and a multi-terminal structure is provided in which multiple resonant ends are connected in sequence.

[0003] As a related example of a radio frequency filter having a plurality of cavity structures, the disclosure of Korean Patent Publication No. 10-2004-0100084 (title: radio frequency filter; publication date: Dec. 2, 2004) previously filed by the present applicant can be cited.

[0004] However, in the existing wireless frequency filters, each resonator extends in the thickness direction within the cavity. In order to have the desired bandpass and characteristics, a part of the filter tuning cover covering the cavity is deformed by engraving, and the distance between the filter and the resonator is adjusted to tune the frequency. Therefore, there is a problem of being very limited in reducing the size of the finished filter in the thickness direction.

[0005] In addition, the existing wireless frequency filter is used to enhance the edge characteristics between a plurality of adjacent resonators or between spaced resonators. In order to realize inductive coupling or capacitive coupling, an additional structure of a conductive material is required to be installed, thus pointing out the problem of significantly increasing the weight of the finished filter. Summary of the invention

[0006] (Problem to be solved)

[0007] The present invention is proposed to solve the above-mentioned technical problems, and its purpose is to provide a filter for communication equipment, including a tuning panel, wherein the tuning panel has a plurality of tuning rods, and the plurality of tuning rods are arranged in a single layer in the thickness direction in a dielectric filling space.

[0008] At the same time, another object of the present invention is to provide a filter for communication equipment as follows: a resonant substrate is configured in a single layer in the dielectric filling space in the thickness direction in a manner different from that of a tuning panel, and the spacing distance between the tuning panel and multiple resonators of the resonant substrate is adjusted to perform frequency tuning.

[0009] Furthermore, another object of the present invention is to provide a communication device filter including a notch forming portion, wherein the notch forming portion and a tuning panel are formed in the same single layer.

[0010] The technical issues of the present invention are not limited to the issues mentioned above, and other technical issues not mentioned can be clearly understood by ordinary technicians in the technical field to which the present invention belongs from the following description.

[0011] (Methods of solving the problem)

[0012] According to one embodiment of the present invention, a filter for communication equipment includes: a filter body, which is open in the thickness direction and forms a part of a dielectric filling space inside; a filter tuning cover, which is combined in the thickness direction of the opening to cover the filter body and form the remaining part of the dielectric filling space; a resonant substrate, including a resonant frame, which is configured with a plurality of resonators so that the plurality of resonators form a single layer in the thickness direction in the dielectric filling space; a frequency tuning panel, including a tuning frame, which is configured with a plurality of tuning rods, which are configured as a single layer in the thickness direction in the dielectric filling space to adjust the distance between the plurality of resonators configured in the dielectric filling space; a spacing portion, which is formed in a stepped shape and is integrated with any one of the filter tuning cover and the frequency tuning panel.

[0013] Here, the spacing portion may be configured to ensure the spacing distance between the plurality of resonators and the plurality of tuning rods.

[0014] In addition, the spacer portion can be formed by a stepped step portion, which is integrated with the filter tuning cover and makes the frame end of the frequency tuning panel stacked at a position higher than the lower end frame of the filter tuning cover stacked on the resonant substrate.

[0015] In addition, the spacer may include the step portion, and the step portion serves as a different layer between the upper surface and the lower surface of the filter tuning cover to form a bonding surface bonded to the upper surface of the frame end portion of the frequency tuning panel.

[0016] In addition, an outer end of the joint surface may be formed at a position corresponding to an end of a frame of the frequency tuning panel.

[0017] In addition, the height of the stepped portion may be a spacing distance between an upper surface of the frequency tuning panel stacked in the dielectric-filled space and an upper surface of the resonance frame of the resonance substrate.

[0018] In addition, the upper surface of the frame end of the tuning frame and the upper surfaces of the plurality of tuning rods may be formed as a single layer having the same horizontal plane.

[0019] Here, the spacer portion may be formed by a stepped portion which is integrally formed with the frequency tuning panel and has a stepped shape so that an end portion of the frame of the frequency tuning panel stacked on the frame of the resonant substrate is located below the plurality of tuning rods.

[0020] In addition, the stepped portion may be formed in a stepped shape so that the plurality of tuning rods and the tuning frame form different layers from each other.

[0021] In addition, an end portion of the filter tuning cover may be laminated and coupled to an upper surface portion of the step portion which is the same layer as the plurality of tuning rods.

[0022] In addition, the height of the stepped portion may be a spacing distance between a lower surface of the filter tuning cover and an upper surface of the tuning frame.

[0023] In addition, the communication device filter may further include a plurality of coupling adjustment rods, which are integrated with the tuning frame of the frequency tuning panel and deformed into the dielectric filling space to change the coupling value between adjacent resonators among the plurality of resonators.

[0024] In addition, the plurality of coupling adjustment rods may be arranged to be staggered from the plurality of resonators in a thickness direction of the dielectric-filled space.

[0025] In addition, the plurality of coupling adjustment rods may be formed to be staggered with the plurality of tuning rods in a length direction of the tuning frame.

[0026] (Effects of the Invention)

[0027] The communication device filter according to one 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 rods of the frequency tuning panel are respectively arranged in different single layers in the dielectric filling space, thereby making it easy to manufacture and design a product with a slimmer appearance.

[0029] Secondly, the notch forming portion forms the same single layer as the plurality of tuning rods of the frequency tuning panel and does not require additional components for edge characteristics, thereby preventing an increase in product weight and facilitating lightweight design. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a downward perspective view showing a filter for a communication device according to a first embodiment of the present invention;

[0031] Figure 2 is an upward perspective view showing a filter for a communication device according to a first embodiment of the present invention;

[0032] Figure 3a and Figure 3b yes Figure 1 and Figure 2 Exploded stereogram of each;

[0033] Figure 4 It is along Figure 1 A partial cutaway stereogram taken along the AA line;

[0034] Figure 5 is a perspective view showing a filter for a communication device according to a second embodiment of the present invention;

[0035] Figure 6a and Figure 6b yes Figure 5 A downward exploded stereogram and an upward exploded stereogram;

[0036] Figure 7 It is along Figure 5 A partial cutaway stereogram taken along the BB line.

[0037] (Explanation of Reference Numerals)

[0038] 100, 200: Filters for communication equipment 110S, 210S: Dielectric filling space

[0039] 110, 210: filter body 117W, 217W: space dividing ribs

[0040] 120, 220: Filter tuning cover 121: Tuning change hole

[0041] 122, 222: tuning holes 125: step portion (spacer)

[0042] 130, 230: resonant substrate 130F, 230F: resonant frame

[0043] 131, 231: Resonator 140, 240: Frequency tuning panel

[0044] 140F, 240F: Tuning frame 141, 241: Tuning rod

[0045] 142, 242: notch forming portion 143, 243: coupling adjustment rod

[0046] 245: Step (spacer) DETAILED DESCRIPTION

[0047] Hereinafter, a communication device filter according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0048] When assigning reference numerals to components of the various drawings, it should be noted that for identical components, even if they are shown in different drawings, they should have the same reference numerals as much as possible. In addition, when describing the embodiments of the present invention, if it is determined that the specific description of the relevant known structure or function hinders the understanding of the embodiments of the present invention, the specific description will be omitted.

[0049] When describing the components of the embodiments of the present invention, the terms first, second, A, B, (a), (b), etc. may be used. Such terms are only used to distinguish one component from other components, and the nature or order of the components shall not be limited by the terms. In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by ordinary technicians in the field to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as consistent with the meaning in the relevant technical articles and shall not be interpreted in an ideal or overly formal sense unless clearly defined in this application.

[0050] The communication device filter 100 , 200 according to the embodiments of the present invention includes a filter body 110 , 210 and a filter tuning cover 120 , 220 . The filter tuning cover 120 , 220 is combined with the filter body 110 , 210 to form a dielectric filling space 110S, 210S between the filter body 110 , 210 .

[0051] The dielectric filling spaces 110S and 210S are filled with a dielectric having a predetermined dielectric constant. In the embodiment of the present invention, air is also a dielectric material having a predetermined dielectric constant, so the description is based on the premise that air is filled in the dielectric filling spaces 110S and 210S as a dielectric. In this way, when air is used as a dielectric, this may mean that the dielectric filling spaces 110S and 210S are not sealed, and no additional dielectric filling process is required. Air as a dielectric may be naturally filled in the dielectric filling spaces 110S and 210S consisting of empty spaces.

[0052] Hereinafter, the communication device filter according to the present invention will be described in detail according to each embodiment.

[0053] Figure 1 is a downward perspective view showing a filter for a communication device according to a first embodiment of the present invention; Figure 2is an upward perspective view showing a filter for a communication device according to a first embodiment of the present invention; Figure 3a and Figure 3b yes Figure 1 and Figure 2 Exploded stereogram of each; Figure 4 It is along Figure 1 Partial cutaway stereogram taken along line AA.

[0054] like Figures 1 to 4 As shown, the filter 100 for communication equipment according to the first embodiment of the present invention may include: a filter body 110; a filter tuning cover 120, which is combined with the filter body 110 to form the dielectric filling space 110S; a resonant substrate 130, including a plurality of resonators 131, and the plurality of resonators 131 are configured to form a single layer in the thickness direction within the dielectric filling space 110S; a frequency tuning panel 140, including a plurality of tuning rods 141, and the plurality of tuning rods 141 are configured to form a single layer in the thickness direction within the dielectric filling space 110S.

[0055] like Figure 3a and Figure 3b As shown, the filter body 110 may be substantially formed in a thin rectangular hexahedron shape to form a closed dielectric filling space 110S having a thickness t smaller than the dimensions in the length direction l and the width direction w.

[0056] Here, a portion of the dielectric-filled space 110S may form a space on one side of the opening of the filter body 110 , and a remaining portion of the dielectric-filled space 110S may form a space on the other side of the filter tuning cover 120 .

[0057] In order to form the dielectric filling space 110S as described above, the filter body 110 is configured to be recessed to a predetermined depth in a direction toward the other side (downward in the drawing) in combination with one side of the filter tuning cover 120, and can be configured to be recessed to a predetermined depth in the inner side of the filter tuning cover 120 in the opposite direction (upward in the drawing).

[0058] The interior of the dielectric filling space 110S can be filled with a dielectric having a predetermined dielectric constant. However, as mentioned above, air is also a type of dielectric having a predetermined dielectric constant. Therefore, in the first embodiment of the present invention (the second embodiment described later is also the same), the description is based on the premise of the dielectric filled with air.

[0059] On the other hand, an input port hole and an output port hole (not shown) may be formed through the filter body 110 to communicate with the dielectric-filled space 110S, and the input port hole and the output port hole fix the input port and the output port (not shown) for inputting a predetermined signal to one side of the resonant substrate 130 described later.

[0060] Here, the input port and the output port may be electrically connected to the resonant substrate 130, respectively, to maintain impedance matching through an input coaxial connector and an output coaxial connector (not shown). However, the electrical connection with the resonant substrate 130 is not limited to the method of using the input port and the input coaxial connector and the output port and the output coaxial connector, but may be electrically connected through various electrical connection structures such as pins as long as it is a conductive medium configured on a main board (not shown).

[0061] The resonant substrate 130 is configured as a single layer in the dielectric-filled space 110S in the thickness direction t, and the plurality of resonators 131 are also formed as a single layer, and may include a resonant frame 130F having a rectangular frame.

[0062] Here, the resonance frame 130F may be formed to have a frame portion substantially matched with the frame ends of the filter body 110 and the filter tuning cover 120 .

[0063] In order to facilitate understanding, the resonance frame 130F is cut into a rectangular shape in the middle and connected in the vertical direction, so as to be approximately Figure 3a and Figure 3b The explanation is based on the premise that it extends from the left side to the right side into a quadrilateral (rectangle), and the left end and the right end in the length direction form relatively shorter sides, so they are called "short sides", and the front end and the rear end in the width direction have relatively longer sides, so they are called "long sides" for explanation.

[0064] Here, if Figure 3a and Figure 3b As shown, the plurality of resonators 131 may be formed by extending a predetermined length from any one of the long sides 130A (hereinafter referred to as “one long side”) of the four sides of the resonance frame 130F toward another long side 130B (hereinafter referred to as “the other long side”).

[0065] However, the plurality of resonators 131 are preferably formed so that their front ends are not connected to the inner end of the frame of the other long side 130B mentioned above, but are spaced apart from each other.

[0066] In addition, the plurality of resonators 131 may be formed such that the front ends are spaced the same distance from the inner end of the frame of the other long side 130B. However, the extension start positions of the plurality of resonators 131 corresponding to the long side 130A on one side are not necessarily the same, but different extension start positions may be designed according to the frequency bandpass and characteristics required by the designer. That is, the extension start position of each of the plurality of resonators 131 is the inner end of the frame of any of the long sides 130A mentioned above, and may be configured to extend from the inner end of the frame of the long side 130A to the extension start position of each of the adjacent resonators 131.

[0067] On the other hand, Figure 3a and Figure 3b As shown, the frequency tuning panel 140 may be configured as a single layer between the resonant substrate 130 and the filter tuning cover 120 .

[0068] In more detail, the frequency tuning panel 140 may include a tuning frame 140F having a rectangular frame, and a plurality of tuning rods 141 extending from the inner side of one long side 140A to the side of the other long side 140B among four sides of the tuning frame 140F.

[0069] Here, the tuning rods 141 may be integrally formed with the tuning frame 140F. Preferably, the tuning rods 141 extend integrally from the inner side of one long side 140A of the tuning frame 140F and extend a predetermined length to form a single layer in the thickness direction t of the dielectric filling space 110S.

[0070] The frequency tuning panel 140 as described above may be configured as a single layer different from the plurality of resonators 131 in the dielectric-filled space 110S in the thickness direction t to adjust the spacing distance between the plurality of tuning rods 141 and the plurality of resonators 131 configured in the dielectric-filled space 110S.

[0071] Here, multiple tuning rods 141 can be arranged along the inner frame surface of the long side 140A of the tuning frame 140F at a predetermined distance in the length direction l, and each tuning rod 141 can be arranged at a distance in the length direction l at a position corresponding to the multiple resonators 131 respectively, and the multiple resonators 131 are arranged in the dielectric filling space 110S and are spaced apart from the multiple tuning rods 141 in the thickness direction t.

[0072] On the other hand, unlike the extension starting positions of the multiple resonators 131 mentioned above, the extension starting positions of the multiple tuning rods 141 from the inner side of the long side 140A of the tuning frame 140F can all be set on the same line, which is equivalent to the inner side frame end of the long side 140A of the tuning frame 140F.

[0073] In addition, the front ends of the above-mentioned multiple resonators 131 extend to be spaced the same distance from the inner end of the frame of the other long side 130B of the resonance frame 130F. In contrast, the lengths of the front ends of the multiple tuning rods 141 extending toward the other long side 140B can be the same or different.

[0074] However, in this case, in the structure where multiple tuning rods 141 adjust the spacing distance between multiple resonators 131 arranged in different single layers in the dielectric filling space 110S to perform frequency fine-tuning, the multiple resonators 131 or the multiple tuning rods 141 are preferably designed to overlap by a predetermined length in the thickness direction t of the dielectric filling space 110S.

[0075] At this time, assuming that the dielectric filled in the dielectric filling space 110S is air, there is an air layer between the multiple resonators 131 of the resonant substrate 130 and the tuning rods 141 of the frequency tuning panel 140. Not only that, there may also be an air layer with the same dielectric constant between the multiple resonators 131 and the inner surface of the filter body 110. According to the shape deformation of each tuning rod 141 of the frequency tuning panel 140, the air layer changes slightly, and the frequency can be fine-tuned.

[0076] At the same time, if Figure 3a and Figure 3b As shown, the filter 100 for communication equipment according to the first embodiment of the present invention may also include a plurality of coupling adjustment rods 143, which are integrated with the tuning frame 140F of the frequency tuning panel 140 and deformed toward the dielectric filling space 110S side to change the coupling value between adjacent resonators 131 among the plurality of resonators.

[0077] Here, similar to the plurality of tuning rods 141 described above, the plurality of coupling adjustment rods 143 may be extended from the inner side of one long side 140A of the tuning frame 140F to the side of the other long side 140B.

[0078] At this time, the plurality of coupling adjustment rods 143 are formed at predetermined intervals in the length direction l of the tuning frame 140F, and any one of the plurality of tuning rods 141 can be arranged between each coupling adjustment rod 143. That is, the plurality of tuning rods 141 and the plurality of coupling adjustment rods 143 are formed to be connected as one body inside the long side 140A of one side of the tuning frame 140F, and can be alternately arranged in the length direction l of the tuning frame 140F.

[0079] In addition, it is preferable that the plurality of coupling adjustment rods 143 are arranged to be staggered from the plurality of resonators 131 in the thickness direction t of the dielectric filling space 110S.

[0080] As described above, if a tuning staff (designer) between adjacent resonators among a plurality of resonators 131 uses a predetermined tool to pressurize the front end of any one of the plurality of coupling adjustment rods 143 to the dielectric filling space 110S in order to achieve a desired coupling value, the front end shape of the coupling adjustment rod 143 is deformed and located between the adjacent resonators 131. According to the specific shape of the C-notch portion 142C or the L-notch portion 142L described later, the coupling value can be achieved according to the design value desired by the staff.

[0081] On the other hand, Figure 3a and Figure 3b As shown, in the filter 100 for communication equipment according to the first embodiment of the present invention, the frequency tuning panel 140 may also include a notch forming portion 142, and the notch forming portion 142 includes an L-notch portion 142L and a C-notch portion 142C. The L-notch portion 142L protrudes from the inner side of the other long side 140B of the four sides of the tuning frame 140F toward the side of the one long side 140A to form a closed loop, while the C-notch portion 142C extends without forming a closed loop but is connected to the inner side of the one long side 140A.

[0082] Here, the L-notch portion 142L performs the role of an L-notch that strengthens the edge characteristics and forms an inductive coupling at the right end of the passband, and the C-notch portion 142C performs the role of a C-notch that strengthens the edge characteristics and forms a capacitive coupling at the left end of the passband.

[0083] The L-notch portion 142L may be configured to extend from the inner side of the other long side 140B of the frequency tuning panel 140 to form the same single layer as the tuning rod 141 and form a closed loop that does not contact the one long side 140A.

[0084] Meanwhile, the C-notch portion 142C may be configured to extend from the inner side of the other long side 140B of the frequency tuning panel 140 or the L-notch portion 142L to form the same single layer with the tuning rod 141 while being connected to one long side 140A. Here, unlike the L-notch portion 142L, the C-notch portion 142C has the difference that it does not form a closed loop with respect to the other long side 140B in the same single layer.

[0085] The C-notch portion 142C and the L-notch portion 142L respectively form an electric field or a magnetic field between multiple resonators 131 in the same single layer having the same shape and the same corner or bend shape, thereby forming the above-mentioned C-notch or L-notch on the left or right side of the passband.

[0086] on the other hand, Figure 3a and Figure 3bAs shown, in the C-notch portion 142C and the L-notch portion 142L, the C-notch portion 142C can be extended not only from the inner end of the frame of the other long side 140B of the frequency tuning panel 140, but also from a part of the already formed L-notch portion 142L.

[0087] Meanwhile, as described above, for the resonator 131 of the resonant substrate 130 and the tuning rod 141 of the frequency tuning panel 140 , adjusting the spacing distance in the thickness direction t to perform frequency fine tuning requires a structural design for ensuring a minimum spacing distance.

[0088] To this end, the communication device filter 100 according to the first embodiment of the present invention may further include a spacer (not marked with a reference numeral) configured to ensure a spacing distance between the tuning rod 141 of the frequency tuning panel 140 and the resonator 131 of the resonant substrate 130 .

[0089] Here, if Figures 1 to 4 As shown, the spacer can be formed by a stepped step portion 125, which is formed integrally with the filter tuning cover 120 in a stepped shape, and the end portion of the frame of the frequency tuning panel 140 is joined and stacked at a position higher than the lower end frame of the filter tuning cover 120 stacked on the resonant substrate 130.

[0090] In more detail, Figure 4 As shown, the spacer may include the step portion 125 as a different layer between the upper and lower surfaces of the filter tuning cover 120 , configured to form a bonding surface 126 to bond to the upper surface of the frame end of the frequency tuning panel 140 .

[0091] Here, at the point where the frequency tuning panel 140 is joined to the joint surface 126 corresponding to the horizontal surface of the step portion 125, it is preferred that the size of the frame end is formed corresponding to the outer end of the joint surface 126. That is, the outer end of the joint surface 126 may be formed at a position corresponding to the frame end of the frequency tuning panel 140 forming the tuning frame 140F.

[0092] Therefore, the height 125 t of the stepped portion 125 may be defined by a spacing distance between the upper surface of the frequency tuning panel 140 stacked in the dielectric-filled space 110S and the upper surface of the resonance frame 130F of the resonance substrate 130 .

[0093] In this case, it is assumed that the upper surface of the frame end portion of the tuning frame 140F and the upper surfaces of the plurality of tuning rods 141 formed on the tuning frame 140F are formed as a single layer having the same horizontal plane.

[0094] The stepped portion 125 as described above performs the role of blocking direct contact between the plurality of tuning rods 141 of the frequency tuning panel 140 and the plurality of resonators 131 of the resonance substrate 130 and forming the above-mentioned air layer.

[0095] As another embodiment for forming a spacing space (air layer) between a plurality of tuning rods 141 and a plurality of resonators 131, a spacing panel configured to be stacked between the frequency tuning panel 140 and the resonant substrate 130 may also be separately manufactured, but the first embodiment 100 of the present invention and the second embodiment 200 described later are concepts that exclude separately manufactured embodiments such as spacing panels.

[0096] Here, blocking direct contact between the frequency tuning panel 140 and the resonant substrate 130 by the spacer only means that a thickness is formed to ensure a spacing distance to avoid physical spatial contact, and does not mean blocking electrical connection.

[0097] There is an air layer between the resonator 131 of the resonant substrate 130 and the tuning rod 141 of the frequency tuning panel 140, and the spacer as described above performs the function of ensuring the above-mentioned spacing distance so that a desired passband frequency can be tuned by finely adjusting the spacing distance in the air layer.

[0098] In more detail, Figures 1 to 4 As shown, the dielectric filling space 110S between the filter body 110 and the filter tuning cover 120 is filled with a dielectric defined by air, and the tuning designer inserts a predetermined tuning tool (not shown) into the inner side of the dielectric filling space 110S through the lower part of the filter body 110 or the upper part of the filter tuning cover 120, and then pressurizes the front end of the resonator 131 toward the tuning rod 141 side, that is, changes the shape in the thickness direction t, or pressurizes the front end of the tuning rod 141 toward the resonator 131 side, that is, changes the shape in the thickness direction t, and then performs frequency fine-tuning.

[0099] Here, a bottom tuning hole (not shown) for inserting the above-mentioned tuning tool can be formed on the lower surface of the filter body 110, and multiple bottom tuning holes can be formed to communicate with the dielectric filling space 110S. An upper tuning hole 122 can be formed on the upper surface of the filter tuning cover 120 for inserting the above-mentioned tuning tool, and multiple upper tuning holes 122 can be formed to communicate with the dielectric filling space 110S.

[0100] However, it is not necessary for both the filter body 110 and the filter tuning cover 120 to have the bottom tuning hole and the upper tuning hole 122. Instead, it may be configured so that any one of the two can function as a tuning hole for inserting the original tuning tool, while the remaining one can function as a tuning change hole for changing the purpose after tuning.

[0101] In addition, if Figures 1 to 4 As shown, the filter body 110 may not have a bottom tuning hole, but only an upper tuning hole 122 and a tuning change hole 121 may be configured on the filter tuning cover 120. The tuning change hole 121 may be a hole configured to insert another tuning change tool (not shown) to readjust the deformed tuning rod 141 when a frequency change is required after fine tuning using a tuning tool.

[0102] The communication device filter according to the first embodiment of the present invention, which is structured as described above, comprises a filter body 110, a resonant substrate 130, a frequency tuning panel 140 and a filter tuning cover 120, which are sequentially layered, and are stacked so that the upper surface of the frequency tuning panel 140 is adhered to the lower surface of a joint surface 126 which is a horizontal surface of a step portion 125, thereby ensuring a predetermined spacing distance in the thickness direction t between the resonator 131 of the resonant substrate 130 and the tuning rod 141 of the frequency tuning panel 140.

[0103] Here, the filter body 110, the resonant substrate 130, the frequency tuning panel 140 and the filter tuning cover 120 may all be made of metal materials, or may be made of predetermined dielectric materials and then the exposed portions on the dielectric filling space 110S side are all covered by metal materials. The exposed portions on the dielectric filling space 110S side are covered by metal materials, and the dielectric filling space 110S can be formed into a closed space within the limit. The method of stacking and combining the filter body 110 with the remaining structures (resonant substrate 130, frequency tuning panel 140 and filter tuning cover 120) is not screw combination, and various methods including welding combination and adhesive combination can be applied.

[0104] The specific passband frequency filtering process of the communication device filter 100 according to the first embodiment of the present invention as constructed above is briefly described below. This can also be directly applied to the communication device filter 200 of the second embodiment described later, so the specific description will be omitted in the description of the second embodiment 200.

[0105] First, if a predetermined signal is input to the dielectric-filled space 110S through an input port on one side, the signal is transmitted sequentially in the length direction l through the resonator 131 of the resonant substrate 130 connected to the input coaxial connector of the input port in the dielectric-filled space 110S, and output through the resonator 131 of the resonant substrate 130 connected to the output coaxial connector of the output port in the dielectric-filled space 110S.

[0106] At this time, the frequency can be fine-tuned by specifically designing the spacing distance between each resonator 131 and the tuning rod 141 in the vertical thickness direction t, thereby only outputting a specific bandpass frequency.

[0107] Here, according to the first embodiment of the filter 100 for communication equipment of the present invention, the extension direction of the resonator 131 is set to form a single layer in the thickness direction t in the dielectric filling space 110S, and the extension direction of the tuning rod 141 is also set to form a single layer different from the resonator 131 in the thickness direction t in the dielectric filling space 110S, thereby providing the advantages of overall slimming production and frequency fine-tuning within the limit of the spacing distance of each single layer that is different from each other in the above-mentioned thickness direction t.

[0108] On the other hand, Figures 1 to 4 As shown, the filter 100 for communication equipment according to the first embodiment of the present invention does not completely partition the dielectric filling space 110S, but may at least include a plurality of space dividing ribs 117W, which partition a portion of the bottom surface of the dielectric filling space 110S formed by the filter body 110.

[0109] A plurality of space dividing ribs 117W are formed by extending 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 of the filter body 110 extended in the length direction l into a plurality of surfaces, and can be formed into a rib shape protruding at least a predetermined length from the bottom surface of the dielectric filling space 110S toward the filter tuning cover 120.

[0110] As described above, the multiple space dividing ribs 117W occupy a portion of the dielectric filling space 110S while at least dividing the space between the resonators 131 into a cavity shape, and adjust the coupling amount between adjacent resonators 131 according to the size or shape of the occupied space, thereby providing the advantage of being able to tune various passband frequencies.

[0111] At the same time, the filter body 110 can be combined so that the bottom surface is completely welded to the side of the main board not shown. The bottom surface of the filter body 110 is divided in the length direction l by the multiple space dividing ribs 117W, which can also disperse and eliminate the thermal stress generated by the difference in thermal expansion coefficient between the main board and the PCB material.

[0112] like Figures 1 to 4 As shown, it has been explained that the filter 100 for communication equipment according to the first embodiment of the present invention may include an L-notch portion 142L that realizes inductive coupling by utilizing the electric field and magnetic field properties between each resonator 131 configured inside the dielectric-filled space 110S, and a C-notch portion 142C that realizes capacitive coupling.

[0113] Inductive coupling is a type of coupling that utilizes the magnetic field properties around the resonator 131 arranged in the dielectric-filled space 110S. It is a coupling that can be naturally formed between adjacent resonators 131 as long as there is no structure that affects the magnetic field properties. In particular, when realizing cross-coupling that skips the middle resonator among any three resonators 131, it is more meaningful to have the above-mentioned L-notch portion 142L. Here, in the case of the communication device filter 100 according to the first embodiment of the present invention, the L-notch portion 142L is arranged so as not to block the front ends of the adjacent resonators 131 in the signal transmission path direction, and can have a portion closer than the middle resonator among any three resonators 131.

[0114] On the other hand, capacitive coupling is a type of coupling that utilizes the properties of electric field lines around the resonator 131 arranged in the dielectric-filled space 110S, and can be realized by a structure arranged on a signal transmission path corresponding to the electric field of the adjacent resonator 131 .

[0115] In more detail, the C-notch portion 142C extends from the other side long side 140B of the frequency tuning panel 140 and is connected to the one side long side 140A, and intervenes in any three resonators 131 of the dielectric-filled space 110S. In this case, the starting end and the front end of the C-notch portion 142C are designed to be configured closer than the middle resonator among any three resonators 131.

[0116] Figure 5 is a perspective view showing a filter for a communication device according to a second embodiment of the present invention; Figure 6a and Figure 6b yes Figure 5 A downward exploded stereogram and an upward exploded stereogram; Figure 7 It is along Figure 5 A partial cutaway stereogram taken along the BB line.

[0117] Compared with the filter 100 for communication equipment of the first embodiment described above, the filter 200 for communication equipment of the second embodiment of the present invention has the same structure except for a spacer for ensuring the spacing distance between the resonator 231 of the resonant substrate 230 and the tuning rod 241 of the frequency tuning panel 240 in the thickness direction t. Therefore, repeated descriptions are omitted and the description is mainly based on the spacer at different points.

[0118] like Figures 5 to 7As shown, in the filter 200 for communication equipment according to the second embodiment of the present invention, the spacer portion can be formed by a stepped step portion 245, and the stepped step portion 245 is formed integrally with the frequency tuning panel 240 in a stepped shape, and the frame end of the frequency tuning panel 240 stacked on the frame of the resonant substrate 230 (in more detail, the frame end of the tuning frame 240F) is located at a position lower than the multiple tuning rods 241.

[0119] In more detail, Figure 6a and Figure 6b As shown, in the case of the communication device filter 100 according to the first embodiment, the tuning frame 240F of the frequency tuning panel 240 and the plurality of tuning rods 241 are all formed on the same layer, but, in contrast, in the communication device filter 200 according to the second embodiment, a stepped portion 245 is formed in a stepped shape so that the tuning frame 240F of the frequency tuning panel 240 and the plurality of tuning rods 241 form different layers from each other.

[0120] Here, if Figure 7 As shown, the end of the filter tuning cover 220 may be stacked and coupled to the upper surface of the step portion 245 which is the same layer as the plurality of tuning rods 241 .

[0121] Therefore, the height of the step portion 245 may be defined by the spacing distance between the lower surface of the filter tuning cover 220 and the upper surface of the tuning frame 240F of the frequency tuning panel 240 .

[0122] As described above, unlike the first embodiment 100 in which the spacer is integrated with the filter tuning cover 120, the difference of the communication device filter 200 according to the second embodiment of the present invention is that the spacer is integrated with the frequency tuning panel 240, but performs the same function in ensuring a predetermined distance to form an air layer between the multiple resonators 131, 231 and the multiple tuning rods 141, 241, and can perform frequency fine-tuning at the same time, thereby making a slim product. Not only that, it also provides the advantage of enhancing edge characteristics through the notch forming portion.

[0123] The above is a detailed description of the communication device filter according to the embodiment of the present invention with reference to the accompanying drawings. However, the embodiment of the present invention is not necessarily limited to the above-mentioned embodiment, but practitioners with common knowledge in the technical field to which the present invention belongs can certainly make various modifications and embodiments within the same scope. Therefore, the true scope of the rights of the present invention should be defined by the claims.

[0124] Industrial Applicability

[0125] The present invention provides a filter for communication equipment, including a tuning panel, wherein the tuning panel has a plurality of tuning rods, wherein the plurality of tuning rods are configured as a single layer in a dielectric filling space in a thickness direction, and furthermore, a resonant substrate is configured in a single layer different from the tuning panel in a thickness direction within the dielectric filling space, and frequency tuning can be performed by adjusting the spacing distance between the tuning panel and a plurality of resonators of the resonant substrate, wherein the filter for communication equipment includes a notch forming portion, wherein the notch forming portion and the tuning panel form the same single layer.

Claims

1. A filter for communication equipment, comprising: The filter body is open in the thickness direction and forms a part of the dielectric filling space inside; a filter tuning cover coupled in the thickness direction of the opening to cover the filter body and form a remaining portion of the dielectric-filled space; A resonant substrate, comprising a resonant frame, wherein the resonant frame is provided with a plurality of resonators so that the plurality of resonators form a single layer in the dielectric filling space with respect to a thickness direction; A frequency tuning panel, comprising a tuning frame, the tuning frame being configured with a plurality of tuning rods, the plurality of tuning rods being configured as a single layer in the dielectric filling space in a thickness direction to adjust the distances between the plurality of resonators configured in the dielectric filling space; and The spacer is formed in a step shape and is integrated with any one of the filter tuning cover and the frequency tuning panel.

2. The communication device filter according to claim 1, characterized in that: The spacing portion is configured to ensure the spacing distance between the plurality of resonators and the plurality of tuning rods.

3. The communication device filter according to claim 1, characterized in that: The spacer is formed by a stepped portion, the stepped portion is formed integrally with the filter tuning cover, and the frame end of the frequency tuning panel is stacked at a position higher than the lower end frame of the filter tuning cover stacked on the resonant substrate.

4. The communication device filter according to claim 3, characterized in that: The spacer includes the step portion, and the step portion is a different layer between the upper surface and the lower surface of the filter tuning cover, forming a bonding surface bonded to the upper surface of the frame end portion of the frequency tuning panel.

5. The communication device filter according to claim 4, characterized in that: The outer end of the joint surface is formed at a position corresponding to the frame end of the frequency tuning panel.

6. The communication device filter according to claim 4, characterized in that: The height of the stepped portion is a spacing distance between an upper surface of the frequency tuning panel stacked in the dielectric-filled space and an upper surface of the resonance frame of the resonance substrate.

7. The communication device filter according to any one of claims 3 to 6, characterized in that: The upper surface of the frame end of the tuning frame and the upper surfaces of the plurality of tuning rods are formed into a single layer having the same horizontal plane.

8. The communication device filter according to claim 1, characterized in that: The spacer is formed by a stepped portion which is integrally formed with the frequency tuning panel and has a stepped shape so that an end of a frame of the frequency tuning panel stacked on the frame of the resonant substrate is located lower than the plurality of tuning rods.

9. The communication device filter according to claim 8, characterized in that: The step portion is formed in a step shape so that the plurality of tuning rods and the tuning frame form different layers from each other.

10. The communication device filter according to claim 8, characterized in that: An end portion of the filter tuning cover is laminated and bonded to an upper surface portion of the step portion which is on the same level as the plurality of tuning rods.

11. The communication device filter according to claim 8, characterized in that: The height of the step portion is the spacing distance between the bottom surface of the filter tuning cover and the top surface of the tuning frame.

12. The communication device filter according to claim 1, characterized in that: Also includes: A plurality of coupling adjustment rods are formed integrally with the tuning frame of the frequency tuning panel and deformed in shape toward the dielectric filling space to change coupling values ​​between adjacent resonators among the plurality of resonators.

13. The communication device filter according to claim 12, characterized in that: The plurality of coupling adjustment rods are arranged to be staggered with respect to the plurality of resonators in a thickness direction of the dielectric-filled space.

14. The communication device filter according to claim 12, characterized in that: The plurality of coupling adjustment rods are formed to be staggered with the plurality of tuning rods in a length direction of the tuning frame.

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