WO2019151762A1 - Filtre à cavité - Google Patents

Filtre à cavité Download PDF

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Publication number
WO2019151762A1
WO2019151762A1 PCT/KR2019/001268 KR2019001268W WO2019151762A1 WO 2019151762 A1 WO2019151762 A1 WO 2019151762A1 KR 2019001268 W KR2019001268 W KR 2019001268W WO 2019151762 A1 WO2019151762 A1 WO 2019151762A1
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WO
WIPO (PCT)
Prior art keywords
terminal
insertion hole
case
pin
cavity filter
Prior art date
Application number
PCT/KR2019/001268
Other languages
English (en)
Korean (ko)
Inventor
김덕용
장성호
김정회
Original Assignee
주식회사 케이엠더블유
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 케이엠더블유 filed Critical 주식회사 케이엠더블유
Priority to CN201980011230.9A priority Critical patent/CN112020793B/zh
Priority to JP2020562065A priority patent/JP6942271B2/ja
Priority to EP19746889.5A priority patent/EP3748766A4/fr
Priority claimed from KR1020190011668A external-priority patent/KR102196781B1/ko
Publication of WO2019151762A1 publication Critical patent/WO2019151762A1/fr
Priority to US16/945,750 priority patent/US11824246B2/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/203—Strip line filters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/207—Hollow waveguide filters

Definitions

  • the present invention relates to a cavity filter, and more particularly, to a cavity filter for a massive MIMO antenna in which the connector fastening structure between the filter and the printed circuit board is improved in consideration of assembly and size.
  • MIMO Multiple Input Multiple Output
  • the transmitter transmits different data through each transmit antenna, and the receiver transmits different data through appropriate signal processing. Spatial multiplexing technique to distinguish. Therefore, as the number of transmit / receive antennas is increased at the same time, the channel capacity increases to allow more data to be transmitted. For example, if you increase the number of antennas to 10, you get about 10 times the channel capacity using the same frequency band compared to the current single antenna system.
  • 4G LTE-advanced uses up to 8 antennas.
  • products with 64 or 128 antennas are being developed in the pre-5G phase, and base station equipment with a much larger number of antennas is expected to be used in 5G.
  • This is called Massive MIMO technology.
  • current cell operation is 2-Dimension
  • 3D-Beamforming is possible when Massive MIMO technology is introduced, so Massive MIMO technology is also called FD-MIMO (Full Dimension).
  • the RF filter having a cavity structure has a resonator composed of a resonator rod which is a conductor inside a box structure formed of a metallic conductor, so that only an electromagnetic field having a natural frequency exists so that only a characteristic frequency of ultra high frequency passes by resonance.
  • the bandpass filter of the cavity structure has a low insertion loss and is advantageous for high power, and thus is widely used as a filter of a mobile communication base station antenna.
  • the present invention has a main purpose to provide a cavity filter having a slimmer and more compact structure and the RF connector is embedded in the thickness direction in the body.
  • an object of the present invention is to provide an assembly method that can minimize the accumulation amount of the assembly tolerance occurring when assembling a plurality of filters and an RF signal connection structure that is easy to mount and maintains the frequency characteristics of the filter uniformly.
  • a resonance element including a coupling block;
  • a first case including the resonating element therein, a second case disposed to cover one surface of the first case, and an electrode pad of an external member provided at an outside of the first case through one end of the first case It is provided to be connected to the projecting, the other end is electrically connected to the coupling block of the resonance element provided in close proximity to the second case side, the terminal portion electrically insulated from the first case, and the length of the first case It is provided on any one side or both sides of the direction, and includes an assembly portion formed with a terminal insertion hole is inserted into the terminal portion, the assembly portion is formed to protrude to the outside of the lower surface of the first case.
  • the terminal insertion hole is formed such that at least a portion of the first case is recessed from the lower surface of the first case or extends from the first case to the PCB board side, and the terminal part is disposed inside the terminal insertion hole and once A pin member connected to a coupling block of the resonator element and the other end connected to the PCB board side; And a terminal body through which the pin member penetrates and is installed in the terminal insertion hole together with the pin member, and accommodates an elastic member for adding an elastic force to the pin member.
  • a pin connector may be provided inside the terminal body to be elastically supported by the elastic member toward the PCB board.
  • the pin connector, the front end may be further protruded to the outside of the terminal insertion port by the elastic member.
  • the terminal insertion hole may include a first insertion hole formed with a relatively wider inner diameter of the side where the PCB board is provided, and a second insertion hole formed with a smaller inner diameter than the first insertion hole. It may further include a dielectric bush to be inserted.
  • the terminal head block may further include a terminal head block coupled to the terminal body and seated on the first insertion opening.
  • the apparatus may further include a ground ground terminal electrically connected to the first case, and the first case may include an annular recess surrounding the first insertion hole to have an installation surface on which the ground ground terminal is installed. have.
  • the annular groove is formed in an annular dovetail shape so that the diameter of the circumferential surface corresponding to the inner diameter increases in the depth direction, and the inlet inner diameter of the annular groove is retracted by elasticity of the ground ground terminal. Inserted into the annular groove, it can be formed with a minimum diameter that can prevent the departure.
  • the ground ground terminal a plurality of fixed ring portion which is seated and fixed to the installation surface of the annular groove and formed in the circumferential direction at the inner circumferential end of the fixing ring portion extending toward the center, the plurality of inclined toward the PCB board side Two elastic ground portions.
  • the terminal insertion hole, the first insertion hole is formed with the inner diameter of the side having the PCB board is the most wide, the inner diameter is relatively smaller than the second insertion hole and the third insertion hole formed relatively smaller than the first insertion opening It may further include a dielectric insert which is formed in a two-stage cylindrical shape, the third insertion hole, comprising a small insertion hole in the second insertion hole and the third insertion hole.
  • the terminal unit may include a pin member disposed inside the terminal insertion hole, one end of which is connected to the resonating element and the other end of which is connected to the PCB board side;
  • the pin member further includes: a pin part positioned over the second insertion hole and the third insertion hole to be connected to the resonance element as the one end;
  • a terminal body part which is formed in the form of a two-stage cylinder integral with the pin part, and has a socket part having a cone-shaped opening therein and positioned over the first insertion hole;
  • an elastic connector fixedly inserted into the socket and connected to the PCB board as the other end. It may include.
  • the elastic connector a cylindrical structure inserted into the socket portion, a truncated conical pin socket contact portion inserted corresponding to the cone-shaped opening portion and an impedance matching portion extending from the pin socket contact portion, Can be.
  • the elastic connector is inserted into the socket portion, provided with contact with the PCB board side, the circular spring portion and the circular spring portion formed to have a constant vertical section of a circular portion except for both ends of the circular shape It may include two plate-like protrusions, which are formed to project perpendicular to the circumference from two points adjacent to the column.
  • the present invention can reduce the size of the antenna system by providing a cavity filter of a slim and compact structure in which the RF connector is built in the thickness direction in the body, and can perform the verification of the individual cavity filter quickly and with high reproducibility, There is an effect that can be easily mounted a plurality of cavity filters inside the mobile communication base station antenna.
  • FIG. 1 is a diagram illustrating a laminated structure of an exemplary massive MIMO antenna.
  • FIG. 2 is a cross-sectional view illustrating a state in which a cavity filter is stacked between an antenna board and a control board according to an embodiment of the present invention.
  • FIG 3 is a perspective view showing the structure of a cavity filter according to an embodiment of the present invention.
  • FIG. 4 is a plan view illustrating a structure in which a terminal part of the first embodiment is employed in the configuration of a cavity filter according to an embodiment of the present invention.
  • FIG. 5 is an exploded perspective view illustrating a structure in which a terminal part of the first embodiment is employed in the configuration of a cavity filter according to an embodiment of the present invention.
  • FIG. 6 is a cross-sectional view and an enlarged view illustrating a cavity filter employing a pin member terminal unit according to an exemplary embodiment of the present invention.
  • FIG. 7 is a partial cutaway perspective view showing an installation state of an assembly of a pin member type terminal unit according to an exemplary embodiment of the present invention.
  • FIG. 8 is a cross-sectional view illustrating a terminal part structure of a cavity filter employing a push pin type elastic connector according to an exemplary embodiment of the present invention.
  • FIG. 9 is a side cross-sectional view illustrating a terminal part structure of a cavity filter employing a push pin type elastic connector according to an exemplary embodiment of the present invention.
  • FIG. 10 is a partial cross-sectional view of a terminal part structure of a cavity filter employing a push ring type elastic connector according to another exemplary embodiment of the present invention.
  • first insertion opening 114 second insertion opening
  • terminal body 132 pin member
  • terminal insertion opening 212 first insertion opening
  • pin portion 234 terminal body portion
  • protrusion 236 socket portion
  • pin socket contact portion 246 impedance matching portion
  • first bush 324 second bush
  • opening 340 elastic connector
  • FIG. 1 is a diagram illustrating a laminated structure of an exemplary massive MIMO antenna.
  • the antenna device 1 includes a housing (not shown) in which a heat sink 11 is formed, and a radome 17 coupled to the housing. Inside the housing is an antenna assembly.
  • a power supply unit (PSU) 12 is coupled to the lower portion of the housing, for example, via a docking structure, and the power supply unit 12 is an operating power source for operating electronic components included in the antenna assembly. To provide.
  • PSU power supply unit
  • an antenna assembly has a cavity filter 14 disposed on the back of an antenna board 15 in which a plurality of antennas 16 are arranged in front, and the number of antennas 16 is associated with the PCB board 13. It has a laminated structure.
  • the cavity filter 14 is carefully tuned and verified to have frequency characteristics that are individually matched prior to mounting. It is desirable that the tuning and verification process be done quickly in an environment with the same characteristics as the mounted state.
  • FIG. 2 is a cross-sectional view illustrating a state in which a cavity filter is stacked between an antenna board and a control board according to an embodiment of the present invention.
  • the conventional RF connectors 14-1 and 14-2 are excluded, thereby facilitating the connection and providing a lower height profile. It is possible to provide an antenna structure 5 having.
  • the RF connection is provided on both sides of the height direction, provided by the terminal unit 20 of the various embodiments described later, even if the vibration and thermal deformation occurs in the antenna board 15 or the PCB board 13, the RF connection remains the same. There is an advantage that there is no change in frequency characteristics.
  • FIG. 3 is a perspective view showing the structure of a cavity filter according to an embodiment of the present invention
  • Figure 4 is a plan view showing the structure of the terminal portion of the first embodiment of the configuration of the cavity filter according to an embodiment of the present invention
  • FIG. 5 is an exploded perspective view illustrating a structure in which a terminal part of the first embodiment is employed in the configuration of a cavity filter according to an embodiment of the present invention
  • FIG. 6 is a pin member type terminal part according to an embodiment of the present invention.
  • 7 is a cross-sectional view and an enlarged view illustrating a cavity filter
  • FIG. 7 is a partially cutaway perspective view illustrating an installation state of an assembly of a pin member type terminal unit according to an exemplary embodiment of the present invention.
  • the cavity filter 18 may include a first case in which a hollow, which is an empty space, is formed and a plurality of resonating elements 83 are arranged in the hollow. 80), the second case 81 and 82 provided as a cover covering the first case 80, and the terminal part 20 provided in the height direction of the cavity filter 18 on both sides in the longitudinal direction of the first case 80. It includes.
  • the terminal portion 20 penetrates the upper or lower surface of the first case 80 to connect the electrode pad (not shown) of the external member such as the PCB board 13 or the antenna board 15 to the resonance element 83.
  • the coupling block 85 provided is electrically connected.
  • first case 80 may be provided to open one side (upper side in the drawing), and the second cases 81 and 82 may be provided to cover one side of the opened first case 80. .
  • the second cases 81 and 82 are provided inside the cover panel 81 and the cover panel 81 provided to cover one side of the first case 80.
  • the support panel 82 may include a support hole 82a formed to support a flat plate of the resonance element 83, which will be described later.
  • the second cases 81 and 82 may have a structure coupled to the first case 80 by laser welding, soldering, or the like, and may be coupled in a screw coupling manner by a fixing screw (not shown). .
  • the first case 80 and the second case 81, 82 may be made of a material such as aluminum (alloy), and silver or copper may be plated on at least a surface forming a hollow to improve electrical characteristics. have.
  • the resonator element 83 installed in the hollow formed by the first case 80 and the second case 81 and 82 may also be made of a material such as aluminum (alloy) or iron (alloy), and may include silver or It may be plated with copper material.
  • the hollows formed in the first case 80 are provided with cavity structures in which a plurality of resonating elements 83 are accommodated, respectively, and the cavity structures are interconnected in the hollows so that the plurality of resonating elements 83 can be connected in multiple stages.
  • a coupling window which is a connecting passage structure for connecting, may be formed. The coupling window may be formed in such a manner that some portions of the partition walls of the cavity structure are removed to a predetermined size.
  • an assembly unit 84 may be formed at one end of the first case 80 and the other end of the first case 80 such that the terminal unit 20 provided as the input terminal 20a and the output terminal 20b is installed.
  • the assembly unit 84 may be provided in the form of a through hole penetrating in the open one side direction of the first case 80 or the other side direction opposite thereto.
  • Both side assembly portions 84 including the terminal portions 20 of the first case 80 and the second case 81 and 82 have a structure formed thicker than the lower surface 86 which is an area therebetween depending on the application.
  • Reference numeral “D”) may be provided by either side or one side assembly 84.
  • the assembling unit 84 including the terminal unit 20 of the first embodiment is provided at one side of the first case 80 in the longitudinal direction, and the PCB board 13 is It is adopted to be formed thicker in the other direction, which is the provided side.
  • the external terminal exposing direction of the terminal unit 20 may be formed such that one side thereof faces the lower surface 88 of the first case 80 and the other side thereof protrudes from the assembly reference surface of the second case 81.
  • the external terminal exposing direction of the terminal part 20 may be formed to have the same direction with respect to the lower surface 86 of the first case 80, for example.
  • a first embodiment of the present invention is a cavity filter 18 used in a base station antenna for mobile communication and installed on an outer member, which is disposed on an outer member and has a resonating element 83 and a coupling block 85 connected therein. 1 through the first case 80, the first case 80 including the electrical connection between the electrode pad of the outer member and the coupling block 85 of the resonator element 83, the first case 80 And a terminal portion 20 which is electrically insulated from the terminal portion 20.
  • the terminal unit 20 will not be divided into the input terminal 20a and the output terminal 20b, but will be used in a generic concept.
  • the terminal portion 20 is recessed at least a portion from the bottom surface 86 of the first case 80 into the first case 80 or extends from the first case 80 to the associated PCB board 13 side.
  • a pin inserted in the terminal insertion hole 110 and a coupling block 85 extending from the resonator element 83 and having the other end connected to the associated PCB board 13 side.
  • the terminal insertion hole 110 may include a first insertion hole 112 and a first insertion hole formed with a relatively wider inner diameter of a side on which the associated PCB board 13 or the outer member is provided.
  • the second insertion hole 114 may be formed to have a smaller inner diameter than that of 112.
  • a guide part 133 having an outer diameter greater than that of the terminal body 131 and the pin member 132 may be formed between the terminal body 131 and the pin member 132.
  • the guide part 133 serves to stably fix the terminal body 131 and the pin member 132 inside the second insertion hole 114 of the terminal insertion hole 110. That is, although not shown in the drawings, the female thread is formed on the inner circumferential surface of the second insertion hole 114 of the terminal insertion hole 110, and the male thread is formed on the outer circumferential surface of the guide part 133, and thus the terminal insertion hole of the terminal part 20 is formed. Since the screw coupling is possible at the time of installation, the assembly is improved, as well as the stable installation is possible.
  • the end of the associated PCB board 13 side of the terminal body 131 for the screwing of the terminal portion 20 to the terminal insertion hole 110 is a spanner into the space exposed through the first insertion hole 112 of the terminal insertion hole 110. It may be formed to have a hexagonal cross section to be assembled using an assembly tool such as.
  • the inside of the terminal body 131 is elastically supported by the elastic member 150 to be always in contact with the electrode pad formed on the associated PCB board 13 or the outer member side, as shown in FIGS. 5 to 7.
  • the installed pin connector 140 may be provided.
  • the front end of the pin connector 140 may be provided to protrude a predetermined length toward the electrode pad side of the associated PCB board 13 or the outer member through the always assembled portion 84 by the elastic support of the elastic member 150. Therefore, when installing the cavity filter 18 according to an embodiment of the present invention between the associated PCB board 13 and the antenna board 15, the pin connector 140 which is elastically supported by the elastic member 150 and is movable. The clearance of the assembly designed for assembly can be eliminated by the moving distance of).
  • the elastic member 150 is located inside the terminal body 131 of the pin member 132, so as to elastically support the pin connector 140 to the associated PCB board 13 or the outer member side. It may be provided.
  • the elastic member 150 as a spring, one end may be supported in the inner space of the terminal body 131, the other end may be supported by the inner end of the pin connector 140.
  • the pin connector 140 may be provided to be supported by the inner surface of the terminal body 131 so as not to be separated out by the elastic support force of the elastic member 140.
  • the first embodiment of the present invention may further include a dielectric bush (not shown) inserted into the first insertion hole 112.
  • the dielectric may be provided to fill a space formed by the second insertion hole 114.
  • the cavity filter 18 may further include a terminal head block 134 coupled to the terminal body 131 and seated on the first insertion hole 112.
  • the terminal head block 134 serves to stably fix the terminal body 131 and the pin member 132, which are formed as a whole, in the terminal insertion hole 110.
  • a male thread may be formed on the outer circumferential surface of the terminal head block 134 as in the guide part 133 described above, and may be screwed to a female thread formed on the inner circumferential surface of the first insertion hole 112 among the terminal insertion holes 110. Do.
  • the cavity filter 18 may further include a ground ground terminal 160 electrically connected to the first case 80.
  • annular groove 170 surrounding the first insertion hole 112 may be formed in the first case 80 to have an installation surface on which the ground ground terminal 160 is installed.
  • the annular groove 170 may be formed in an annular dovetail shape in which a circumferential surface corresponding to an inner diameter is larger in a depth direction.
  • the annular groove 170 forming the installation surface on which the grounding terminal 160 is installed will be described in detail later by dividing it into the name 'second annular groove'.
  • the cavity filter according to the first exemplary embodiment of the present invention does not need to increase the size of the terminal insertion hole 110, and the pin is formed by maintaining the elastic force by the elastic member 150 properly.
  • the impedance between the member 132 and the terminal insertion hole 110 may be kept constant.
  • FIG. 8 is a cross-sectional view illustrating a terminal part structure of a cavity filter employing a push pin type elastic connector according to an embodiment of the present invention
  • FIG. 9 is a push pin type elastic type according to another embodiment of the present invention. It is a side sectional view which shows the structure of the terminal part of the cavity filter which employ
  • the terminal portion 20 of the cavity filter 18 may include a terminal insertion hole 210, a dielectric bush 220, a pin member 230, an elastic connector 240, and an elastic member 250. ) And a ground ground terminal 260.
  • the terminal insertion hole 210 has a cylindrical shape and is formed from the lower surface 86 of the first case 80 to penetrate the first case 80, or is formed from the upper surface of the first case 80. It may be provided through one case 80. When formed from the upper surface of the first case 80, the through holes are also formed in the second case (81, 82) and the depth of the terminal insertion hole 210 can be adjusted in consideration of this.
  • the terminal insertion hole 210 may be formed in three stages to decrease the diameter in stages. The largest diameter is defined as the first insertion hole 212, followed by the second insertion hole 214, and the smallest diameter as the third insertion hole 216.
  • the dielectric bushes 220 and 222 are in the form of two-stage cylinders and have a through hole 226 penetrating through the center thereof.
  • the dielectric bush 220 is inserted into and fixed to the first insertion hole 212 and the second insertion hole 214 of the terminal insertion hole 210.
  • the dielectric bushes 220 and 222 may be made of Teflon material.
  • one body is disclosed as being configured in the form of a two-stage cylinder, but is not limited thereto, and may be assembled to have a two-stage cylinder form with different diameters.
  • the pin member 230 is in the form of a two-stage cylinder in which the pin portion 232 and the terminal body portion 234 are integrally formed in the longitudinal direction.
  • the terminal body portion 234 is provided with a socket portion 236, the inside of which is hollow in a hollow form.
  • the fin member 230 may be gold plated on a BeCu (Beryllium Copper) material.
  • the pin portion 232 is inserted into and fixed to the through holes 226 of the dielectric bushes 220 and 222.
  • the outer circumferential surface of the pin portion 232 is formed with a wedge-shaped protrusion 235 so that the pin portion 232 does not fall in the opposite direction in which the pin portion 232 is inserted.
  • the annular stepped portion formed at the boundary between the pin portion 232 and the terminal body portion 234 is assembled to abut one side of the dielectric bushes 220 and 222.
  • the first dielectric 220 and the third insertion hole 216 of the terminal insertion hole 210 are provided so that the dielectric bushes 220 and 222 occupy the second insertion hole 214 of the terminal insertion hole 210.
  • the annular stepped portion of the terminal body 234 may be assembled to be in close contact with the first dielectric 220.
  • the terminal body portion 234 is formed to be shorter than the depth of the third insertion hole 216, and as described above, a hollow socket portion 236 is formed inside, the cone-shaped opening of which diameter decreases inward from the inlet 238 is formed.
  • the opening 238 may be, for example, inclined at an angle of 30 degrees with respect to the central axis.
  • a first annular groove 237 is formed inside the opening 238 having a cone shape to prevent separation of the elastic connector 240 inserted therein.
  • An elastic member 250 may be inserted between the innermost inner surface of the opening 238 and the tip of the insertion portion of the elastic connector 240 to further provide a force for pushing the elastic connector 240 out of the opening 238. have.
  • the elastic connector 240 extends from the pinned contact 244 and the pinsocket contact 244 having a cylindrical structure inserted into the socket 236 and a truncated conical shape inserted corresponding to the opening 238 of the cone shape.
  • An impedance matching portion 246 is integrally formed in the longitudinal direction.
  • the elastic connector 240 may be gold plated on the BeCu material.
  • an annular projection 242 of the wedge cross-sectional shape protruding from the outer peripheral surface. The annular protrusion 242 is accommodated in the first annular groove 237 when the elastic connector 240 is inserted into the socket 236 to prevent the elastic connector 240 from being separated from the socket 236.
  • the angle of the pin socket contact portion 244 is formed 5 degrees to 10 degrees larger than the angle of the cone-shaped opening portion 238 of the socket portion 236 with respect to the central axis.
  • the elastic connector 240 has a cross-shaped cutout portion 248 is formed locally along the central axis from the outer surface exposed to the outside after being inserted into the socket portion 236.
  • the depth of the incision 248 extends through the truncated cone shape to the cylindrical structure of the elastic connector 240.
  • the cutout 248 is illustrated as a cross shape, but is not limited thereto, and may be formed in a straight shape or a plurality of slot shapes.
  • the length of the elastic connector 240 is in the cone-shaped opening 238 of the socket portion 236 in a state in which the elastic connector 240 is inserted into the socket portion 236 so that the cross-shaped cutout 248 is not retracted. When touched, it protrudes from the bottom surface 88 of the first case 80, and when the cavity filter 18 is mounted, the elastic connector 240 has a length to be inserted while pressing the opening 238 of the socket portion 236. Is formed.
  • the outer edge of the outer surface of the elastic connector 240 is an area electrically connected to the electrode pad formed on the PCB board 13 to which the cavity filter 18 is assembled while the elastic connector 240 is retracted.
  • This outer edge is defined by the electrode edge 249.
  • the electrode corner 249 is formed in a round shape in the range of R0.1 to R0.5, even if the elastic connector 240 is retracted to form a shallow cone shape in which the outer surface is concave in the plane. 249 is provided to have a uniform contact area with the electrode pad formed on the PCB board (13).
  • the cavity filter 18 is actually assembled with the PCB board 13 and may have various height deviations. Even if the elastic connector 240 is retracted by forming the electrode edges 249 in a round shape, the cavity filter 18 may be uniform. It can have one contact area.
  • the angle of the opening 238, the angle of the pin socket contact 244, the length of the elastic connector 240 and the round size of the electrode edge 249 may be defined by one side of the first case 80 or the second case 81. It is preferable to select based on when the assembly reference plane and the PCB board 13 are combined. In more detail, when the PCB board 13 is coupled, the elastic connector 240 is pushed up and slides along the opening 238 of the socket 236, and the cross-shaped cutout 248 is lifted up. When the cutout 248 is retracted, the angle of the pin socket contact portion 244 of the elastic connector 240 decreases, and the contact area between the opening 238 and the pin socket contact portion 244 changes.
  • the elastic member 250 inserted into the socket 236 pushes the elastic connector 240 toward the PCB board 13 and the force including the reaction force from the pin socket contact 244 is applied to each contact.
  • Each contact surface is elastically deformed.
  • Design specifications of the socket portion 236, the elastic connector 240 and the elastic member 250 to determine the contact area is preferably selected in consideration of the impedance of the terminal portion (20). That is, it is preferable to determine the design specification that the change of the impedance along the signal path of the terminal portion 20 including the contact resistance determined by the contact area and the contact pressure is minimized.
  • the signal quality may be deteriorated if the characteristic impedance of the signal line is not constant. Impedance mismatching of the signal path in multi-gigahertz signals can increase the voltage standing wave ratio (VSWR), which can degrade signal quality due to signal reflection and distortion.
  • VSWR voltage standing wave ratio
  • the third insertion hole 216 is spaced apart from the outer circumferential surface of the terminal body portion 234 with a predetermined air gap, and between the second insertion hole 214 and the third insertion hole 216 and the pin part 232.
  • dielectric bushes 220 and 222 of Teflon material are mediated.
  • the pin part 232 and the terminal body part 234 of the pin member 230 have a stepped diameter, and the diameter and the depth of the second insertion hole 214 are considered in this regard, the pin member 230 and the terminal insertion hole 210. It is preferable to select so that the impedance of the liver remains constant.
  • the dielectric constant of the Teflon material is about twice that of air.
  • the diameter of the first insertion hole 212 is larger than that of the second insertion hole 214 and the third insertion hole 216.
  • the dielectric bushes 220 and 222 are made of PEEK material having a dielectric constant about three times that of air, the diameter of the first insertion hole 212 is larger than that of Teflon.
  • 9 (a) to 9 (d) illustrate the shapes of the electrode corners 249 and the impedance matching unit 246 of the elastic connector 240 in contact with the electrode pads of the PCB board 13 or the external member in various forms. It is. These shapes and sizes can be selected by performing numerical analysis in consideration of the distance from the first insertion opening 212, or by evaluating the VSWR of the terminal unit 20 using, for example, a network analyzer.
  • FIG. 9A illustrates an example in which the impedance matching part 246 protrudes vertically at a position away from the pin socket contact part 244, and the electrode edge 249 is an example in which a fine round of R0.1 is formed.
  • 9B is an example in which the inclination angle of the pin socket contact portion 244 of the elastic connector 240 is maintained and extends to the electrode edge 249.
  • FIG. 9C illustrates a case in which the impedance matching unit 246 is formed to have an inclined surface that decreases in diameter again at a position away from the pin socket contact portion 244.
  • FIG. 9E illustrates a case in which the elastic member 250 is omitted, and a force (contact pressure) for pushing the electrode pads of the elastic connector 240 and the PCB board 13 in contact therewith has a cross shape of the elastic connector 240. It is an example showing the case where the cutout portion 248 is formed by the reaction force from the pin socket contact portion 244 as it is retracted.
  • a second annular recess 270 is formed to surround the signal line, surround the cylindrical portion, and accommodate the ground ground terminal 260 inserted to securely connect the ground. Can be.
  • FIG. 10 is a partial cross-sectional view of a terminal portion structure of a cavity filter employing a push ring type elastic connector according to an embodiment of the present invention.
  • the terminal unit 30 includes a terminal insertion hole 310, a dielectric bush 320, a pin member 330, a push ring type elastic connector 340, and a ground ground terminal ( 360).
  • the impedance matching is more strictly performed.
  • the dielectric bush 320 is formed in a separate type, and the diameters of the through holes 326 and 328 of the two-stage dielectric bushes 322 and 324 are different.
  • the pin portion 332 of the 330 is formed in two stages corresponding to the dielectric bush 320, the terminal insertion hole 310, the dielectric bush 320, the pin portion 332, and the ground ground terminal 360 may be formed. It may be configured in the same form as the embodiment of FIG. That is, the terminal insertion hole 310 is, as in the second embodiment of the pin member method, as shown in Figs. 8 and 9, the first insertion opening 312 having the largest diameter, and the second insertion opening following it. 314 and the third insertion hole 316 having the smallest diameter, the dielectric bush 320 and the pin portion 332 can be installed in the same configuration as the installation configuration of the second embodiment.
  • the pin member 330 includes a terminal body portion 334 in which the pin portion 332 and the socket portion 336 are formed.
  • the pin member 330 may be gold plated on the BeCu material.
  • the pin portion 332 is inserted into and fixed to the through holes 326 and 328 of the dielectric bush 320.
  • the annular stepped portion formed at the boundary between the pin portion 332 and the terminal body portion 334 is assembled to abut one side of the dielectric bush 320.
  • the first dielectric 322 disposed to occupy the third insertion hole 316 of the terminal insertion hole 310 as the dielectric bush 320 for impedance matching is divided into two stages (see reference numerals 322 and 324).
  • a second dielectric 324 disposed to occupy the second insertion hole 314 of the terminal insertion hole 210, the annular stepped portion between the pin part 332 and the terminal body part 334 may include a second dielectric ( 324).
  • the terminal body portion 334 is formed shorter than the depth of the first insertion opening 312, the inside is hollow, and the opening of the cone shape 338 is reduced in diameter from the inlet to the inside.
  • the cone-shaped opening 338 is formed to be inclined at an angle of 60 degrees with respect to the central axis, for example, on the outer circumferential surface of the circular spring portion 344 of the elastic connector 340 of the push ring method. It is formed to circumscribe.
  • the elastic connector 340 of the push ring type is formed from a spring plate having a predetermined width in most of its length except for both ends.
  • the elastic connector 340 includes a circular spring portion 344 and two plate-like protrusions 342 projecting perpendicularly to the circumference from two points 346 adjacent to the circumference of the circular spring portion 344 on one side.
  • the width of the elastic connector 340 is formed so that the plate-like protrusion 342 can be inserted into the socket 336.
  • the elastic connector 340 may be formed of a BeCu material and may be gold plated, and the two plate-shaped protrusions 342 may be spaced apart from each other, and the circular spring part 344 may be deformed into an ellipse when an external force acts in the center direction thereof. It is formed to act as a leaf spring.
  • the two plate-like protrusions 342 of the elastic connector 340 are inserted into the socket portion 336, the two plate-like protrusions 342 are opened to each other so that the end portions of the two plate-like protrusions 342 are in close contact with the inner circumferential surface of the socket portion 336 to maintain the inserted state.
  • the circular spring portion 344 is in close contact with the outer surface of the circular spring portion 344 so as to be circumscribed, and the position opposite to the plate-shaped protrusion 342 is from the lower surface 88 of the first case 80.
  • the pin member 330 and the electrode pad are electrically connected to each other while the electrode pad is elastically deformed into an ellipse shape as the electrode pad presses the circular spring part 344. It provides a sufficient contact pressure to press the contact area so that the contact state does not change even when external vibration is applied.
  • Cavity filter 18 provides a cavity filter (20) by providing an RF connection terminal portion 20 including elastic connectors 240, 340, 440 formed so that the terminals are exposed on both sides or one surface of the height direction.
  • the thickness of 18) can be reduced, making it possible to build a slimmer and more compact stacked MIMO antenna system.
  • Embodiments of the cavity filter according to the present invention can be used for a mobile communication base station antenna.

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

Abstract

La présente invention concerne un filtre à cavité et, en particulier, un filtre à cavité comprenant : un élément de résonance comprenant un bloc de couplage ; un premier boîtier comprenant l'élément de résonance à l'intérieur de celui-ci ; un second boîtier agencé de façon à recouvrir une surface du premier boîtier ; une unité de borne pénétrant dans le premier boîtier de telle sorte qu'une extrémité de celle-ci est disposée en saillie de façon à être connectée à un plot d'électrode d'un élément externe disposé sur l'extérieur du premier boîtier et l'autre extrémité de celle-ci est électroconnectée au bloc de couplage de l'élément de résonance placé proche du second boîtier, l'unité de borne étant électroconnectée au premier boîtier et isolée électriquement du premier boîtier ; et une unité d'assemblage disposée sur l'un ou l'autre côté ou les deux côtés dans la direction longitudinale du boîtier, et ayant un trou d'insertion de borne dans lequel l'unité de borne est placée par insertion, l'unité d'assemblage étant formée pour faire saillie vers l'extérieur à partir d'une surface inférieure du premier boîtier.
PCT/KR2019/001268 2018-01-31 2019-01-30 Filtre à cavité WO2019151762A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201980011230.9A CN112020793B (zh) 2018-01-31 2019-01-30 空腔滤波器
JP2020562065A JP6942271B2 (ja) 2018-01-31 2019-01-30 キャビティフィルタ
EP19746889.5A EP3748766A4 (fr) 2018-01-31 2019-01-30 Filtre à cavité
US16/945,750 US11824246B2 (en) 2018-01-31 2020-07-31 Cavity filter with a slim and compact structure

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2018-0012497 2018-01-31
KR20180012497 2018-01-31
KR1020190011668A KR102196781B1 (ko) 2018-01-31 2019-01-30 캐비티 필터
KR10-2019-0011668 2019-01-30

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US16/945,750 Continuation US11824246B2 (en) 2018-01-31 2020-07-31 Cavity filter with a slim and compact structure

Publications (1)

Publication Number Publication Date
WO2019151762A1 true WO2019151762A1 (fr) 2019-08-08

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PCT/KR2019/001268 WO2019151762A1 (fr) 2018-01-31 2019-01-30 Filtre à cavité

Country Status (1)

Country Link
WO (1) WO2019151762A1 (fr)

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Publication number Priority date Publication date Assignee Title
KR20110041919A (ko) * 2009-10-16 2011-04-22 주식회사 에이스테크놀로지 회로기판 연결장치 및 이를 구비하는 ｒｆ 캐비티 필터
KR20170021750A (ko) * 2015-08-18 2017-02-28 삼성전자주식회사 캐비티 필터
KR101728152B1 (ko) * 2016-09-21 2017-04-19 (주)웨이브텍 캐비티형 무선 주파수 필터 및 그것의 제조방법
JP2017535183A (ja) * 2014-10-11 2017-11-24 中興通訊股▲ふん▼有限公司Ｚｔｅ Ｃｏｒｐｏｒａｔｉｏｎ Ｒｆユニット
KR101801260B1 (ko) * 2015-12-11 2017-11-27 주식회사 이너트론 필터 모듈 및 이를 포함하는 필터 패키지

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Publication number Priority date Publication date Assignee Title
KR20110041919A (ko) * 2009-10-16 2011-04-22 주식회사 에이스테크놀로지 회로기판 연결장치 및 이를 구비하는 ｒｆ 캐비티 필터
JP2017535183A (ja) * 2014-10-11 2017-11-24 中興通訊股▲ふん▼有限公司Ｚｔｅ Ｃｏｒｐｏｒａｔｉｏｎ Ｒｆユニット
KR20170021750A (ko) * 2015-08-18 2017-02-28 삼성전자주식회사 캐비티 필터
KR101801260B1 (ko) * 2015-12-11 2017-11-27 주식회사 이너트론 필터 모듈 및 이를 포함하는 필터 패키지
KR101728152B1 (ko) * 2016-09-21 2017-04-19 (주)웨이브텍 캐비티형 무선 주파수 필터 및 그것의 제조방법

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