WO2023047812A1 - 電力分配器 - Google Patents
電力分配器 Download PDFInfo
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- WO2023047812A1 WO2023047812A1 PCT/JP2022/029826 JP2022029826W WO2023047812A1 WO 2023047812 A1 WO2023047812 A1 WO 2023047812A1 JP 2022029826 W JP2022029826 W JP 2022029826W WO 2023047812 A1 WO2023047812 A1 WO 2023047812A1
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- inductor
- terminal
- plate electrode
- laminate
- circuit
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- 239000003990 capacitor Substances 0.000 claims abstract description 89
- 238000004804 winding Methods 0.000 claims description 35
- 238000003475 lamination Methods 0.000 claims description 27
- 238000002955 isolation Methods 0.000 claims description 10
- 230000000052 comparative effect Effects 0.000 description 16
- 238000010586 diagram Methods 0.000 description 16
- 230000005672 electromagnetic field Effects 0.000 description 8
- 101000954570 Mus musculus V-type proton ATPase 16 kDa proteolipid subunit c Proteins 0.000 description 5
- 108700002808 N-Me-Phe(3)- morphiceptin Proteins 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2804—Printed windings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
- H01F27/292—Surface mounted devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/40—Structural combinations of fixed capacitors with other electric elements, the structure mainly consisting of a capacitor, e.g. RC combinations
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/48—Networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2804—Printed windings
- H01F2027/2809—Printed windings on stacked layers
Definitions
- the present disclosure relates to power dividers, and more particularly to techniques for improving characteristics in power dividers.
- Patent Document 1 discloses a power distribution/combining component for distributing or combining high frequency power.
- the power distribution/combination component is connected between a common terminal and a connection point that branches the path to the first terminal and the second terminal.
- a configuration is described that improves isolation characteristics by arranging an inductor and a capacitor respectively connected between the common terminal and connection point and the ground.
- a power distributor as described above is used, for example, in mobile terminals such as mobile phones or smart phones, and base stations for mobile communications.
- array antennas using a plurality of radiating elements may be adopted as antennas used in these communication devices.
- a power divider as described above is required in order to branch the high-frequency signal into a plurality of paths and supply them to each radiating element.
- the present disclosure has been made to solve such problems, and the purpose thereof is to suppress characteristic fluctuations of demultiplexed signals in a power divider to widen the band.
- a power distributor includes a common terminal, a ground terminal, first and second terminals, and first and second circuits.
- a first circuit is connected to the common terminal.
- the second circuit is connected to the first terminal and the second terminal, branches the signal that has passed through the first circuit at a branch point, and transmits the signal to the first terminal and the second terminal.
- the first circuit includes a first inductor and a second inductor connected in parallel between the common terminal and the branch point, a first capacitor connected between the common terminal and the ground terminal, and the branch point and the ground terminal. and a second capacitor connected between.
- the second circuit includes third and fourth inductors, third and fourth capacitors, and a resistive element.
- the third inductor has one end connected to the branch point and is arranged on a path from the branch point to the first terminal.
- the fourth inductor has one end connected to the branch point and is arranged on a path from the branch point to the second terminal.
- a third capacitor is connected between the other end of the third inductor and the ground terminal.
- a fourth capacitor is connected between the other end of the fourth inductor and the ground terminal.
- a resistive element is connected between the other end of the third inductor and the other end of the fourth inductor.
- the inductor arranged between the common terminal and the branch point is composed of two inductors connected in parallel.
- the path from the common terminal to the first terminal and the path from the common terminal to the second terminal can have a symmetrical structure. As a result, it is possible to suppress characteristic fluctuations of the demultiplexed signal and widen the band.
- FIG. 2 is an equivalent circuit diagram of the power distributor according to Embodiment 1.
- FIG. 1 is an external perspective view of a power distributor according to Embodiment 1.
- FIG. 3 is an exploded perspective view of the power distributor of FIG. 2;
- FIG. 4 is a diagram for explaining the arrangement of inductors in a laminate; It is an equivalent circuit diagram of a power divider of a comparative example.
- FIG. 5 is a diagram for explaining the arrangement of inductors in a comparative example;
- FIG. 10 is an external perspective view of a power distributor according to Embodiment 2;
- FIG. 10 is an external perspective view of a power distributor according to Embodiment 2;
- FIG. 10 is an external perspective view of a power distributor according to Embodiment 2;
- FIG. 10 is an external perspective view of
- FIG. 10 is an exploded perspective view of the power distributor of FIG. 9;
- FIG. 4 is a diagram for explaining the arrangement of inductors in a laminate;
- FIG. 1 is a first diagram showing the characteristics of the power distributor of Embodiment 2;
- FIG. 2 is a second diagram showing characteristics of the power distributor of Embodiment 2;
- FIG. 1 is an equivalent circuit diagram of power distributor 100 according to the first embodiment.
- Power distributor 100 is used, for example, when distributing a common high-frequency signal to a plurality of radiating elements, such as an array antenna in which a plurality of radiating elements are arranged.
- the power distributor 100 includes a common terminal T0, a first terminal T1, a second terminal T2, a first circuit CR1, and a second circuit CR2.
- the first circuit CR1 is connected to the common terminal T0.
- the second circuit CR2 is connected between the first circuit CR1 and the first terminal T1 and the second terminal T2.
- the second circuit CR2 branches the signal supplied to the common terminal T0 and passed through the first circuit CR1, and transmits the branched signal to the first terminal T1 and the second terminal T2.
- the first circuit CR1 includes inductors L11 and L12 and capacitors C1 and C2. Inductor L11 and inductor L12 are connected in parallel between common terminal T0 and branch point BP1 in second circuit CR2. Capacitor C1 is connected between common terminal T0 and ground terminal GND. Capacitor C2 is connected between branch point BP1 and ground terminal GND. That is, the first circuit CR1 functions as a ⁇ -type low-pass filter.
- the second circuit CR2 includes inductors L21 and L22, capacitors C21 and C22, and a resistive element R1.
- the inductor L21 is connected between the branch point BP1 to which the first circuit CR1 is connected and the first terminal T1.
- the inductor L22 is connected between the branch point BP1 and the second terminal T2.
- the capacitor C21 is connected between the first terminal T1 and the ground terminal GND.
- Capacitor C22 is connected between second terminal T2 and ground terminal GND.
- the resistive element R1 is connected between the first terminal T1 and the second terminal T2.
- the inductance value of the inductor L21 is set to the same value as the inductance value of the inductor L22.
- the capacitance value of the capacitor C21 is set to the same value as the capacitance value of the capacitor C22. That is, the impedance value of the path from the branch point BP1 to the first terminal T1 is the same as the impedance value of the path from the branch point BP1 to the second terminal T2. As a result, the power supplied to the common terminal T0 is equally divided by the second circuit CR2 and output from the first terminal T1 and the second terminal T2.
- the first circuit CR1 forms at least one attenuation pole in the isolation characteristics of the path from the first terminal T1 to the second terminal T2. Also, one attenuation pole is formed in the isolation characteristic by the resistance element R1 included in the second circuit CR2.
- FIG. 2 is an external perspective view of the power distributor 100
- FIG. 3 is an exploded perspective view showing an example of the laminated structure of the power distributor 100. As shown in FIG.
- power distributor 100 includes a rectangular parallelepiped or substantially rectangular parallelepiped laminate 110 in which a plurality of dielectric layers LY1 to LY9 are laminated in the lamination direction, and a laminate 110 provided outside laminate 110. and a resistive element R1.
- the dielectric layers LY1 to LY9 are made of ceramic such as low temperature co-fired ceramics (LTCC) or resin.
- LTCC low temperature co-fired ceramics
- the inductors and capacitors in the first circuit CR1 and the second circuit CR2 in FIG. Configured.
- the term "via” refers to a conductor provided in a dielectric layer for connecting electrodes provided on different dielectric layers. Vias are formed, for example, by conductive paste, plating, and/or metal pins.
- the stacking direction of the dielectric layers LY1 to LY9 in the laminate 110 is defined as the "Z-axis direction", and the direction perpendicular to the Z-axis direction and along the long side of the laminate 110 is defined as the "X-axis direction.”
- the direction along the short side of the laminate 110 is defined as the “Y-axis direction”.
- the positive direction of the Z-axis in each drawing may be referred to as the upper side, and the negative direction may be referred to as the lower side.
- the laminate 110 has a top surface 111, a bottom surface 112, and side surfaces 113-116.
- the upper surface 111 is the surface of the laminate 110 in the positive Z-axis direction
- the lower surface 112 is the surface of the laminate 110 in the negative Z-axis direction.
- the side surface 113 is the surface of the laminate 110 in the positive direction of the X axis
- the side surface 114 is the surface of the laminate 110 in the negative direction of the X axis.
- the side surface 115 is the surface of the laminate 110 in the positive Y-axis direction
- the side surface 116 is the surface of the laminate 110 in the negative Y-axis direction.
- a directional mark DM for specifying the direction of the power distributor 100 is arranged on the upper surface 111 (dielectric layer LY1) of the laminated body 110 .
- a plurality of external terminals (a common terminal T0, a first terminal T1, a second terminal T2 and a ground terminal GND) are arranged on side surfaces 115 and 116 of the laminate 110 for connecting the laminate 110 to other devices.
- Each external terminal has a substantially C-shape and extends from top surface 111 through side surface 115 to bottom surface 112 or from top surface 111 through side surface 116 to bottom surface 112 .
- a first terminal T1, a second terminal T2, and a ground terminal GND are arranged on the side surface 115 side.
- a common terminal T0 and a ground terminal GND are arranged on the side surface 116 side.
- the resistive element R1 is connected to the first terminal T1 and the second terminal T2.
- the common terminal T0 is connected to the capacitor electrode PC1 arranged on the dielectric layer LY9 on the lower surface 112 side.
- the capacitor electrode PC1 at least partially overlaps the substantially rectangular ground electrode PG1 disposed on the dielectric layer LY8 when the multilayer body 110 is viewed from the stacking direction (Z-axis direction).
- the ground electrode PG1 is connected to the ground terminal GND.
- the capacitor C1 in the first circuit CR1 of FIG. 1 is configured by the capacitor electrode PC1 and the ground electrode PG1.
- the common terminal T0 is also connected to the plate electrode P10 arranged on the dielectric layer LY2.
- the plate electrode P10 is a strip-shaped electrode extending in the X-axis direction, and is connected to the common terminal T0 at its central portion.
- a via V11 is connected to one end of the plate electrode P10, and a via V15 is connected to the other end of the plate electrode P10.
- the via V11 is connected to one end of a strip-shaped plate electrode PL11 arranged on the dielectric layer LY3.
- the plate electrode PL11 has a substantially U-shaped or C-shaped shape.
- a via V12 is connected to the other end of the plate electrode PL11.
- the via V12 is connected to one end of a strip-shaped plate electrode PL12 arranged on the dielectric layer LY4.
- the plate electrode PL12 has a substantially U- or C-shape.
- a via V13 is connected to the other end of the plate electrode PL12.
- the via V13 is connected to one end of a strip-shaped plate electrode PL13 arranged on the dielectric layer LY5.
- the plate electrode PL13 has a substantially U- or C-shape.
- a via V14 is connected to the other end of the plate electrode PL13.
- the plate electrodes PL11, PL12, and PL13 are arranged so that most of the paths overlap each other when the laminate 110 is viewed from above in the lamination direction. That is, the plate electrodes PL11, PL12, PL13 and the vias V11, V12, V13, V14 form a helical coil having the Z-axis as the winding axis. This helical coil corresponds to inductor L11 in FIG.
- the via V15 is connected to one end of a strip-shaped plate electrode PL15 arranged on the dielectric layer LY3.
- the plate electrode PL15 has a substantially U- or C-shape.
- a via V16 is connected to the other end of the plate electrode PL15.
- the via V16 is connected to one end of a strip-shaped plate electrode PL16 arranged on the dielectric layer LY4.
- the plate electrode PL16 has a substantially U- or C-shape.
- a via V17 is connected to the other end of the plate electrode PL16.
- the via V17 is connected to one end of a strip-shaped plate electrode PL17 arranged on the dielectric layer LY5.
- the plate electrode PL17 has a substantially U- or C-shape.
- a via V18 is connected to the other end of the plate electrode PL17.
- the plate electrodes PL15, PL16, and PL17 are arranged so that most of the paths overlap each other when the laminate 110 is viewed from above in the lamination direction. That is, the plate electrodes PL15, PL16, PL17 and the vias V15, V16, V17, V18 form a helical coil having the Z-axis as the winding axis. This helical coil corresponds to inductor L12 in FIG.
- a via V14 forming the inductor L11 and a via V18 forming the inductor L12 are connected to the plate electrode P11 arranged on the dielectric layer LY6.
- the plate electrode P11 is a strip-shaped electrode extending in the X-axis direction. One end of the plate electrode P11 is connected to a via V14, and the other end of the plate electrode P11 is connected to a via V18.
- the plate electrode P11 is connected in the central portion to a plate electrode P12 extending parallel to the plate electrode P11.
- a via V19 is connected to the connecting portion P13 connecting the flat plate electrode P11 and the flat plate electrode P12.
- the via V19 is connected to the plate electrode PC2 arranged on the dielectric layer LY7.
- the flat plate electrode PC2 has a rectangular shape, and at least partially overlaps the ground electrode PG1 of the dielectric layer LY8 when the laminate 110 is viewed from above in the lamination direction.
- a capacitor C2 in the first circuit CR1 of FIG. 1 is configured by the plate electrode PC2 and the ground electrode PG1.
- the flat plate electrode P12 is a strip-shaped electrode extending in the X-axis direction. One end of the flat plate electrode P12 is connected to the flat plate electrode PL21, and the other end of the flat plate electrode P12 is connected to the flat plate electrode PL25.
- the plate electrode PL21 is a strip-shaped electrode having a substantially U- or C-shape.
- a via V21 is connected to the end of the plate electrode PL21 opposite to the end connected to the plate electrode P12.
- the via V21 is connected to one end of a strip-shaped plate electrode PL22 arranged on the dielectric layer LY5.
- the plate electrode PL22 has a substantially U- or C-shape.
- a via V22 is connected to the other end of the plate electrode PL22.
- the via V22 is connected to one end of a strip-shaped plate electrode PL23 arranged on the dielectric layer LY4.
- the plate electrode PL23 has a substantially U- or C-shape.
- a via V23 is connected to the other end of the plate electrode PL23.
- the via V23 is connected to one end of a strip-shaped plate electrode PL24 arranged on the dielectric layer LY3.
- the plate electrode PL24 has a substantially U-shaped or C-shaped shape.
- the other end of plate electrode PL24 is connected to first terminal T1 arranged on side surface 115 .
- the plate electrodes PL21, PL22, PL23, and PL24 are arranged so that most of the paths overlap each other when the laminate 110 is viewed from above in the lamination direction. That is, the flat plate electrodes PL21, PL22, PL23, PL24 and the vias V21, V22, V23 form a helical coil whose winding axis is the Z-axis. This helical coil corresponds to inductor L21 in FIG.
- the first terminal T1 is connected to a plate-shaped capacitor electrode PC3 arranged on the dielectric layer LY9.
- the capacitor electrode PC3 at least partially overlaps the ground electrode PG1 of the dielectric layer LY8 when the laminate 110 is viewed from above in the lamination direction.
- a capacitor C21 in the second circuit CR2 of FIG. 1 is configured by the plate electrode PC3 and the ground electrode PG1.
- the plate electrode PL25 on the dielectric layer LY6 is a strip-shaped electrode having a substantially U- or C-shape.
- a via V25 is connected to the end of the plate electrode PL25 opposite to the end connected to the plate electrode P12.
- the via V25 is connected to one end of a strip-shaped plate electrode PL26 arranged on the dielectric layer LY5.
- the plate electrode PL26 has a substantially U- or C-shape.
- a via V26 is connected to the other end of the plate electrode PL26.
- the via V26 is connected to one end of a strip-shaped plate electrode PL27 arranged on the dielectric layer LY4.
- the plate electrode PL27 has a substantially U- or C-shape.
- a via V27 is connected to the other end of the plate electrode PL27.
- the via V27 is connected to one end of a strip-shaped plate electrode PL28 arranged on the dielectric layer LY3.
- the plate electrode PL28 has a substantially U- or C-shape.
- the other end of plate electrode PL28 is connected to second terminal T2 arranged on side surface 115 .
- the plate electrodes PL25, PL26, PL27, and PL28 are arranged so that most of the paths overlap with each other when the laminate 110 is viewed from above in the lamination direction. That is, the plate electrodes PL25, PL26, PL27, PL28 and the vias V25, V26, V27 form a helical coil having the Z-axis as the winding axis. This helical coil corresponds to inductor L22 in FIG.
- the second terminal T2 is connected to a plate-shaped capacitor electrode PC4 arranged on the dielectric layer LY9.
- the capacitor electrode PC4 at least partially overlaps the ground electrode PG1 of the dielectric layer LY8 when the laminate 110 is viewed from above in the lamination direction.
- the capacitor C22 in the second circuit CR2 of FIG. 1 is configured by the capacitor electrode PC4 and the ground electrode PG1.
- a resistance element R1 in the second circuit CR2 of FIG. 1 is connected to the first terminal T1 and the second terminal T2.
- the resistive element R1 is configured as an individual chip resistor arranged outside the laminate 110, and external terminals of the resistive element R1 are connected to the first terminal T1 and the second terminal T2.
- the resistive element R1 may be configured as a plate electrode PR1 arranged inside or on the upper surface 111 of the laminate 110 .
- the plate electrode PR1 is, for example, a strip-shaped electrode arranged on the dielectric layer LY2 and extending in the X-axis direction.
- the other end of plate electrode PR1 is connected to second terminal T2 on side surface 115 .
- the plate electrode PR1 may be configured as a meandering electrode in order to obtain a desired resistance value.
- FIG. 4 is a schematic plan view of the inductors L11, L12, L21, and L22 formed in the dielectric layers LY2 to LY6, viewed from the positive direction of the Z axis.
- the inductors L11 and L12 are arranged at positions symmetrical with respect to the virtual line CL1 passing through the common terminal T0.
- the inductor L21 and the inductor L22 are arranged at positions that are symmetrical with respect to the virtual line CL1.
- the winding direction (CW direction: first direction) of inductor L11 is opposite to the winding direction (CCW direction: second direction) of inductor L12
- the winding direction (CW direction) of inductor L21 is opposite to inductor L22.
- the winding direction of inductor L11 is the same as the winding direction of inductor L21
- the winding direction of inductor L12 is the same as the winding direction of inductor L22.
- the path from the common terminal T0 to the first terminal T1 and the path from the common terminal T0 to the second The path to terminal T2 can be structurally symmetrical.
- the electromagnetic field generated by the inductor can be made symmetrical.
- FIG. 5 is an equivalent circuit diagram of a power divider 100X in a comparative example.
- power divider 100X has a configuration in which first circuit CR1 in power divider 100 of FIG. 1 is replaced with first circuit CR1X.
- the second circuit CR2 in the power divider 100X is similar to the power divider 100.
- FIG. 6 is a diagram for explaining an overview of the arrangement of inductors in the power divider 100X of the comparative example, and corresponds to FIG. 4 above.
- the structure in the case of power distributor 100X, although the structure can be substantially line-symmetrical with respect to imaginary line CL2, there is only one inductor L1 in first circuit CR1X. Therefore, the winding direction of inductor L1 is opposite to the winding direction of either inductor L21 or inductor L22. Therefore, the electromagnetic field generated by the power distributor 100X is not symmetrical, and the electromagnetic fields cancel each other between the inductors whose winding directions are opposite to each other (the inductor L1 and the inductor L22 in FIG. 6). . As a result, fluctuations may occur in the phase difference and the amplitude difference in the power divider 100X.
- FIG. 7 is a diagram showing a comparison of the phase difference (PD) and the amplitude balance (AB) in the power divider 100 of Embodiment 1 and the power divider 100X of the comparative example.
- the upper part of FIG. 7 shows the characteristics of the power divider 100X of the comparative example, and the lower part shows the characteristics of the power divider 100 of the first embodiment.
- both the phase difference (line LN10) and the amplitude balance (line LN15) fluctuate greatly as the frequency increases.
- both the phase difference (line LN11) and the amplitude balance (line LN16) are almost zero even if the frequency changes, and compared to the comparative example, the phase difference is almost zero. Phase difference and amplitude difference are improved.
- the inductor arranged between the common terminal T0 and the branch point BP1 is composed of two parallel-connected inductors, and the laminate is planar.
- the power distributor 100 outputs the signal input to the common terminal T0 from the first terminal T1 and the second terminal T2 has been described as an example.
- the power divider 100 can also function as a power combiner that combines signals input to the first terminal T1 and the second terminal T2 and outputs the combined signal from the common terminal T0.
- “Inductor L11,” “Inductor L12,” “Inductor L21,” and “Inductor L22” in Embodiment 1 correspond to “first inductor,” “second inductor,” “third inductor,” and “fourth inductor” in the present disclosure.
- “Inductor”. “Capacitor C1,” “Capacitor C2,” “Capacitor C21,” and “Capacitor C22” in Embodiment 1 correspond to “first capacitor,” “second capacitor,” “third capacitor,” and “fourth capacitor” in the present disclosure. Capacitor”, respectively.
- FIG. 8 is an equivalent circuit diagram of power distributor 100A according to the second embodiment.
- the power distributor 100A has a configuration in which the second circuit CR2 in the power distributor 100 of the first embodiment is replaced with a second circuit CR2A.
- the second circuit CR2A further includes a third circuit CR3 in addition to the configuration of the second circuit CR2 of the first embodiment.
- description of elements that overlap with power splitter 100 of the first embodiment will not be repeated.
- the third circuit CR3 is arranged between the configuration of the second circuit CR2 and the first terminal T1 and the second terminal T2.
- the third circuit CR3 includes inductors L31, L32 and capacitors C31, C32.
- the inductor L31 is connected between the inductor L21 and the first terminal T1.
- inductors L21 and L31 are connected in series between branch point BP1 and first terminal T1.
- Inductor L32 is connected between inductor L22 and second terminal T2. In other words, inductors L22 and L32 are connected in series between branch point BP1 and second terminal T2.
- the capacitor C31 is connected in parallel with the resistance element R1. Also, the capacitor C32 is connected between the first terminal T1 and the second terminal T2.
- the third circuit CR3 included in the second circuit CR2A forms a further attenuation pole in the isolation characteristics of the path from the first terminal T1 to the second terminal T2.
- FIG. 9 is an external perspective view of the power distributor 100A
- FIG. 10 is an exploded perspective view showing an example of the laminated structure of the power distributor 100A.
- a power distributor 100A includes a rectangular parallelepiped or substantially rectangular parallelepiped laminate 110A in which a plurality of dielectric layers LY11 to LY23 are laminated in the lamination direction, and a laminate 110A provided outside the laminate 110A. and a resistive element R1.
- the dielectric layers LY11 to LY23 are made of ceramic such as low temperature co-fired ceramics (LTCC) or resin, as in the first embodiment.
- a directional mark DM for specifying the direction of the power distributor 100A is arranged on the upper surface 111 (dielectric layer LY11) of the laminate 110A. External terminals are also arranged on the side surfaces 113 and 114 of the laminate 110A. The external terminal on the side surface 114 is the first terminal T1, and the external terminal on the side surface 113 is the second terminal T2.
- a common terminal T0 and a ground terminal GND are arranged on the side surface 116, and a ground terminal GND and connection terminals T3 and T4 are arranged on the side surface 115.
- the resistance element R1 is connected to the connection terminals T3 and T4.
- the common terminal T0 is connected to the capacitor electrode PC11 arranged on the dielectric layer LY23 on the lower surface 112 side.
- the capacitor electrode PC11 at least partially overlaps the substantially rectangular ground electrode PG10 disposed on the dielectric layer LY22 when the laminate 110A is viewed from above in the lamination direction.
- the ground electrode PG10 is connected to the ground terminal GND.
- the capacitor C1 in the first circuit CR1 of FIG. 8 is configured by the capacitor electrode PC11 and the ground electrode PG10.
- the common terminal T0 is also connected to the plate electrodes PL31 and PL41 arranged on the dielectric layer LY19.
- Each of the plate electrodes PL31 and PL41 is a belt-like electrode having a substantially U-shape or C-shape, and one ends thereof are connected to each other.
- a common terminal T0 is connected to the connecting portion between the plate electrode PL31 and the plate electrode PL41.
- a via V31 is connected to the other end of the plate electrode PL31, and a via V41 is connected to the other end of the plate electrode PL41.
- the via V31 is connected to one end of a strip-shaped plate electrode PL32 arranged on the dielectric layer LY18.
- the plate electrode PL32 has a substantially U- or C-shape.
- a via V32 is connected to the other end of the plate electrode PL32.
- the via V32 is connected to one end of a strip-shaped plate electrode PL33 arranged on the dielectric layer LY17.
- the plate electrode PL33 has a substantially U- or C-shape.
- a via V33 is connected to the other end of the plate electrode PL33.
- the via V33 is connected to one end of a strip-shaped plate electrode PL34 arranged on the dielectric layer LY16.
- the plate electrode PL34 has a substantially U- or C-shape.
- a via V34 is connected to the other end of the plate electrode PL34.
- the via V34 is connected to one end of a strip-shaped plate electrode PL35 arranged on the dielectric layer LY15.
- the plate electrode PL35 has a substantially U- or C-shape.
- the plate electrodes PL31, PL32, PL33, PL34, and PL35 are arranged so that most of the paths overlap with each other when the laminate 110A is viewed from above in the lamination direction. That is, the plate electrodes PL31, PL32, PL33, PL34, PL35 and the vias V31, V32, V33, V34 form a helical coil with the Z-axis as the winding axis. This helical coil corresponds to inductor L11 in FIG.
- the via V41 is connected to one end of a strip-shaped plate electrode PL42 arranged on the dielectric layer LY18.
- the plate electrode PL42 has a substantially U- or C-shape.
- a via V42 is connected to the other end of the plate electrode PL42.
- the via V42 is connected to one end of a strip-shaped plate electrode PL43 arranged on the dielectric layer LY17.
- the plate electrode PL43 has a substantially U- or C-shape.
- a via V43 is connected to the other end of the plate electrode PL43.
- the via V43 is connected to one end of a strip-shaped plate electrode PL44 arranged on the dielectric layer LY16.
- the plate electrode PL44 has a substantially U-shaped or C-shaped shape.
- a via V44 is connected to the other end of the plate electrode PL44.
- the via V44 is connected to one end of a strip-shaped plate electrode PL45 arranged on the dielectric layer LY15.
- the plate electrode PL45 has a substantially U- or C-shape.
- the plate electrodes PL41, PL42, PL43, PL44, and PL45 are arranged so that most of the paths overlap each other when the laminate 110A is viewed from above in the lamination direction. That is, the plate electrodes PL41, PL42, PL43, PL44, PL45 and the vias V41, V42, V43, V44 form a helical coil having the Z-axis as the winding axis. This helical coil corresponds to inductor L12 in FIG.
- a portion of the plate electrode PL35 overlaps a portion of the plate electrode PL45, and the other ends are shared.
- a via V1 is connected to the common other end of the plate electrode PL35 and the plate electrode PL45.
- the via V1 is connected to the plate electrode P20 arranged on the dielectric layer LY14 and the capacitor electrode PC14 arranged on the dielectric layer LY13.
- Each of the plate electrode P20 and the capacitor electrode PC14 is a strip-shaped electrode extending in the X-axis direction, and is connected to the via V1 at the central portion in the extending direction.
- Capacitor C2 in the equivalent circuit of FIG. 8 is configured by capacitor electrode PC14 and ground electrode PG11.
- a via V51 is connected to one end of the flat plate electrode P20 on the dielectric layer LY14, and a via V61 is connected to the other end of the flat plate electrode P20.
- the via V51 is connected to one end of the plate electrode PL51 arranged on the dielectric layer LY15.
- the plate electrode PL51 has a substantially U- or C-shape.
- a via V52 is connected to the other end of the plate electrode PL51.
- the via V52 is connected to one end of a strip-shaped plate electrode PL52 arranged on the dielectric layer LY16.
- the plate electrode PL52 has a substantially U- or C-shape.
- a via V53 is connected to the other end of the plate electrode PL52.
- the via V53 is connected to one end of a strip-shaped plate electrode PL53 arranged on the dielectric layer LY17.
- the plate electrode PL53 has a substantially U-shaped or C-shaped shape.
- a via V54 is connected to the other end of the plate electrode PL53.
- the via V54 is connected to one end of a strip-shaped plate electrode PL54 arranged on the dielectric layer LY18.
- the plate electrode PL53 has a substantially U-shaped or C-shaped shape.
- the other end of the plate electrode PL53 is connected to the connection terminal T3 arranged on the side surface 115, and is also connected to one end of the strip-shaped plate electrode PL71.
- the plate electrodes PL51, PL52, PL53, and PL54 are arranged so that most of the paths overlap with each other when the laminate 110A is viewed from above in the lamination direction. That is, the plate electrodes PL51, PL52, PL53, PL54 and the vias V51, V52, V53, V54 form a helical coil having the Z-axis as the winding axis. This helical coil corresponds to inductor L21 in FIG.
- the via V61 is connected to one end of the plate electrode PL61 arranged on the dielectric layer LY15.
- the plate electrode PL61 has a substantially U- or C-shape.
- a via V62 is connected to the other end of the plate electrode PL61.
- the via V62 is connected to one end of a strip-shaped plate electrode PL62 arranged on the dielectric layer LY16.
- the plate electrode PL62 has a substantially U- or C-shape.
- a via V63 is connected to the other end of the plate electrode PL62.
- the via V63 is connected to one end of a strip-shaped plate electrode PL63 arranged on the dielectric layer LY17.
- the plate electrode PL63 has a substantially U- or C-shape.
- a via V64 is connected to the other end of the plate electrode PL63.
- the via V64 is connected to one end of a strip-shaped plate electrode PL64 arranged on the dielectric layer LY18.
- the plate electrode PL63 has a substantially U- or C-shape.
- the other end of the plate electrode PL63 is connected to the connection terminal T4 arranged on the side surface 115, and is also connected to one end of the strip-shaped plate electrode PL81.
- the plate electrodes PL61, PL62, PL63, and PL64 are arranged so that most of the paths overlap with each other when the laminate 110A is viewed from above in the lamination direction. That is, the plate electrodes PL61, PL62, PL63, PL64 and the vias V61, V62, V63, V64 form a helical coil with the Z-axis as the winding axis. This helical coil corresponds to inductor L22 in FIG.
- a via V71 is connected to the other end of the plate electrode PL71 on the dielectric layer LY18.
- the via V71 is connected to one end of a strip-shaped plate electrode PL72 arranged on the dielectric layer LY17.
- the plate electrode PL72 has a substantially U- or C-shape.
- a via V72 is connected to the other end of the plate electrode PL72.
- the via V72 is connected to one end of a strip-shaped plate electrode PL73 arranged on the dielectric layer LY16.
- the plate electrode PL73 has a substantially U- or C-shape.
- a via V74 is connected to the other end of the plate electrode PL73.
- the via V74 is connected to one end of a strip-shaped plate electrode PL74 arranged on the dielectric layer LY15.
- the plate electrode PL74 has a substantially U-shaped or C-shaped shape.
- the other end of plate electrode PL74 is connected to first terminal T1 arranged on side surface 114 .
- the plate electrodes PL71, PL72, PL73, and PL74 are arranged so that most of the paths overlap with each other when the laminate 110A is viewed from above in the lamination direction. That is, the plate electrodes PL71, PL72, PL73, PL74 and the vias V71, V72, V73 form a helical coil having the Z-axis as the winding axis. This helical coil corresponds to inductor L31 in FIG.
- a via V81 is connected to the other end of the plate electrode PL81 on the dielectric layer LY18.
- the via V81 is connected to one end of a strip-shaped plate electrode PL82 arranged on the dielectric layer LY17.
- the plate electrode PL82 has a substantially U- or C-shape.
- a via V82 is connected to the other end of the plate electrode PL82.
- the via V82 is connected to one end of a strip-shaped plate electrode PL83 arranged on the dielectric layer LY16.
- the plate electrode PL83 has a substantially U- or C-shape.
- a via V84 is connected to the other end of the plate electrode PL83.
- the via V84 is connected to one end of a strip-shaped plate electrode PL84 arranged on the dielectric layer LY15.
- the plate electrode PL84 has a substantially U- or C-shape.
- the other end of plate electrode PL84 is connected to second terminal T2 arranged on side surface 113 .
- the plate electrodes PL81, PL82, PL83, and PL84 are arranged so that most of the paths overlap each other when the laminate 110A is viewed from above in the lamination direction. That is, the flat plate electrodes PL81, PL82, PL83, PL84 and the vias V81, V82, V83 form a helical coil whose winding axis is the Z-axis. This helical coil corresponds to inductor L32 in FIG.
- a via V2 is connected in the middle of the plate electrode PL74 in the dielectric layer LY15.
- the via V2 is connected to the capacitor electrode PC15 arranged on the dielectric layer LY13.
- the capacitor electrode PC15 is a strip-shaped electrode extending in the X-axis direction.
- a via V3 is connected in the middle of the plate electrode PL84.
- the via V3 is connected to the capacitor electrode PC16 arranged on the dielectric layer LY13.
- the capacitor electrode PC16 is a strip-shaped electrode extending in the X-axis direction.
- capacitor electrode PC15 When the laminate 110A is viewed from the lamination direction, part of the capacitor electrode PC15 and part of the capacitor electrode PC16 overlap with the capacitor electrode PC17 arranged on the dielectric layer LY12.
- the capacitor electrode PC17 is a strip-shaped electrode extending in the X-axis direction.
- Capacitor electrodes PC15, PC16, and PC17 constitute a capacitor C32 in the equivalent circuit of FIG.
- the connection terminal T3 arranged on the side surface 115 of the laminate 110A includes the plate electrodes PL54 and PL71 arranged on the dielectric layer LY18, the capacitor electrode PC19 arranged on the dielectric layer LY20, and the dielectric layer LY23. is connected to the capacitor electrode PC12.
- a part of the capacitor electrode PC12 arranged on the dielectric layer LY23 overlaps the ground electrode PG11 of the dielectric layer LY22.
- Capacitor electrode PC12 and ground electrode PG11 constitute capacitor C21 in the equivalent circuit of FIG.
- the connection terminal T4 arranged on the side surface 115 of the laminate 110A includes the plate electrodes PL64 and PL81 arranged on the dielectric layer LY18, the capacitor electrode PC20 arranged on the dielectric layer LY20, and the dielectric layer LY23. is connected to the capacitor electrode PC13.
- a part of the capacitor electrode PC13 arranged on the dielectric layer LY23 overlaps the ground electrode PG11 of the dielectric layer LY22.
- Capacitor electrode PC13 and ground electrode PG11 constitute capacitor C22 in the equivalent circuit of FIG.
- Capacitor electrodes PC18, PC19, and PC20 constitute a capacitor C31 in the equivalent circuit of FIG.
- connection terminals T3 and T4 are connected to a resistance element R1 provided outside the laminate 110A.
- the resistive element R1 may be arranged inside the laminate 110A.
- FIG. 11 is a schematic plan view of the inductors L11, L12, L21, L22, L31, and L32 formed in the dielectric layers LY15 to LY19, viewed from the positive direction of the Z axis.
- the inductors L11 and L12 are arranged at positions that are symmetrical with respect to a virtual line CL2 passing through the common terminal T0.
- the inductors L21 and L22, and the inductors L31 and L32 are also arranged at positions that are symmetrical with respect to the virtual line CL2.
- the winding directions of the inductors L11, L21, and L31 are all the same CW direction.
- the winding directions of the inductors L12, L22, and L32 are all the same in the CCW direction.
- the path from the common terminal T0 to the first terminal T1 and the path from the common terminal T0 to the second terminal T2 are structurally symmetrical.
- the inductor can be made symmetrical.
- FIG. 12 is a diagram showing isolation between the first terminal T1 and the second terminal T2 in the power divider 100A of the second embodiment and the power divider 100X of the comparative example shown in the first embodiment. is.
- a solid line LN20 indicates the power divider 100A of the second embodiment
- a dashed line LN21 indicates the power divider 100X of the comparative example.
- Attenuation poles occur at two locations near 3.5 GHz and 4.7 GHz in the power divider 100X of the comparative example.
- power distributor 100A of the second embodiment attenuation poles are added by third circuit CR3, and attenuation poles occur at three locations near 2.7 GHz, near 3.9 GHz, and near 5.0 GHz. ing.
- the attenuation amount in the power divider 100A of the second embodiment is generally larger than in the comparative example. Therefore, comparing frequency bandwidths that can achieve isolation of 20 dB, for example, the bandwidth BW1 of the power divider 100A is wider than the bandwidth BW2 in the comparative example (BW1>BW2). In other words, wideband isolation characteristics are realized.
- FIG. 13 is a diagram showing the phase difference (PD) and amplitude balance (AB) between the first terminal T1 and the second terminal T2 of the power divider 100A of the second embodiment.
- PD phase difference
- AB amplitude balance
- the phase difference and the Fluctuations in amplitude difference can be suppressed.
- the “inductor L31” and “inductor L32” in the second embodiment respectively correspond to the “fifth inductor” and “sixth inductor” in the present disclosure.
- “Capacitor C31” and “Capacitor C32” in Embodiment 1 respectively correspond to “Fifth capacitor” and “Sixth capacitor” in the present disclosure.
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Abstract
Description
(電力分配器の回路構成)
図1は、実施の形態1に係る電力分配器100の等価回路図である。電力分配器100は、たとえば、複数の放射素子が配列されたアレイアンテナのように、共通の高周波信号を複数の放射素子に分配するような場合に用いられる。
次に図2および図3を用いて、電力分配器100の詳細な構造について説明する。図2は電力分配器100の外形斜視図であり、図3は電力分配器100の積層構造の一例を示す分解斜視図である。
実施の形態1の電力分配器100の特性を、比較例とともに説明する。図5は、比較例における電力分配器100Xの等価回路図である。図5を参照して、電力分配器100Xにおいては、図1の電力分配器100における第1回路CR1が、第1回路CR1Xに置き換わった構成を有している。電力分配器100Xにおける第2回路CR2は、電力分配器100と同様である。電力分配器100Xの第1回路CR1Xにおいては、電力分配器100におけるインダクタL11,L12の並列回路が、単独のインダクタL1に置き換わった構成となっている。
実施の形態2においては、電力分配器の第2回路にさらに回路が追加された構成について説明する。
図8は、実施の形態2に係る電力分配器100Aの等価回路図である。電力分配器100Aは、実施の形態1の電力分配器100における第2回路CR2が、第2回路CR2Aに置き換えられた構成となっている。第2回路CR2Aは、実施の形態1の第2回路CR2の構成に加えて、さらに第3回路CR3を含んでいる。なお、電力分配器100Aにおいて、実施の形態1の電力分配器100と重複する要素の説明は繰り返さない。
次に図9および図10を用いて、電力分配器100Aの詳細な構造について説明する。図9は電力分配器100Aの外形斜視図であり、図10は電力分配器100Aの積層構造の一例を示す分解斜視図である。
図12は、実施の形態2の電力分配器100A、および実施の形態1で示した比較例の電力分配器100Xにおける、第1端子T1と第2端子T2との間のアイソレーションを示した図である。図12において、実線LN20は実施の形態2の電力分配器100Aを示しており、破線LN21は比較例の電力分配器100Xを示している。
Claims (10)
- 共通端子と、
接地端子と、
第1端子および第2端子と、
前記共通端子に接続された第1回路と、
前記第1端子および前記第2端子に接続され、前記第1回路を通過した信号を分岐点において分岐して前記第1端子および前記第2端子に伝達する第2回路とを備え、
前記第1回路は、
前記共通端子と前記分岐点との間に並列に接続された第1インダクタおよび第2インダクタと、
前記共通端子と前記接地端子との間に接続された第1キャパシタと、
前記分岐点と前記接地端子との間に接続された第2キャパシタとを含み、
前記第2回路は、
一方端が前記分岐点に接続され、前記分岐点から前記第1端子に至る経路に配置された第3インダクタと、
一方端が前記分岐点に接続され、前記分岐点から前記第2端子に至る経路に配置された第4インダクタと、
前記第3インダクタの他方端と前記接地端子との間に接続された第3キャパシタと、
前記第4インダクタの他方端と前記接地端子との間に接続された第4キャパシタと、
前記第3インダクタの他方端と前記第4インダクタの他方端との間に接続された抵抗素子とを含む、電力分配器。 - 複数の誘電体層が積層された積層体をさらに備え、
前記第1インダクタ、前記第2インダクタ、前記第3インダクタおよび前記第4インダクタの各々は、前記積層体の内部に配置され、前記積層体の積層方向を巻回軸とするコイルであり、
前記積層体を積層方向から平面視した場合に、
前記第1インダクタおよび前記第2インダクタは、前記共通端子を通る仮想線に対して線対称の位置に配置され、
前記第3インダクタおよび前記第4インダクタは、前記仮想線に対して線対称の位置に配置される、請求項1に記載の電力分配器。 - 前記積層体を積層方向から平面視した場合に、
前記第1インダクタおよび前記第3インダクタの巻回方向は第1方向であり、
前記第2インダクタおよび前記第4インダクタの巻回方向は、前記第1方向と反対の第2方向である、請求項2に記載の電力分配器。 - 前記抵抗素子は、前記積層体の外部に配置される、請求項2または3に記載の電力分配器。
- 前記第2回路は、
前記第3インダクタの他方端と前記第1端子との間に接続された第5インダクタと、
前記第4インダクタの他方端と前記第2端子との間に接続された第6インダクタと、
前記抵抗素子に並列に接続された第5キャパシタと、
前記第1端子と前記第2端子との間に接続された第6キャパシタとをさらに備える、請求項1に記載の電力分配器。 - 複数の誘電体層が積層された積層体をさらに備え、
前記第1インダクタ~前記第6インダクタの各々は、前記積層体の内部に配置され、前記積層体の積層方向を巻回軸とするコイルであり、
前記積層体を積層方向から平面視した場合に、
前記第1インダクタおよび前記第2インダクタは、前記共通端子を通る仮想線に対して線対称の位置に配置され、
前記第3インダクタおよび前記第4インダクタは、前記仮想線に対して線対称の位置に配置され、
前記第5インダクタおよび前記第6インダクタは、前記仮想線に対して線対称の位置に配置される、請求項5に記載の電力分配器。 - 前記積層体を積層方向から平面視した場合に、
前記第1インダクタ、前記第3インダクタおよび前記第5インダクタの巻回方向は第1方向であり、
前記第2インダクタ、前記第4インダクタおよび前記第6インダクタの巻回方向は、前記第1方向と反対の第2方向である、請求項6に記載の電力分配器。 - 前記抵抗素子は、前記積層体の外部に配置される、請求項6または7に記載の電力分配器。
- 前記第1回路によって、前記第1端子から前記第2端子に至る経路のアイソレーション特性において、少なくとも1つの減衰極が生じる、請求項1~8のいずれか1項に記載の電力分配器。
- 前記第2回路によって、前記第1端子から前記第2端子に至る経路のアイソレーション特性において、少なくとも1つの減衰極が生じる、請求項1~9のいずれか1項に記載の電力分配器。
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JP2002344276A (ja) * | 2001-05-16 | 2002-11-29 | Murata Mfg Co Ltd | 高周波電力分配・合成回路および高周波電力分配・合成部品 |
JP2011166344A (ja) * | 2010-02-08 | 2011-08-25 | Tdk Corp | 積層型電子部品 |
WO2020045576A1 (ja) * | 2018-08-30 | 2020-03-05 | 株式会社村田製作所 | 電力分配/結合回路および電力分配/結合部品 |
WO2020121985A1 (ja) * | 2018-12-12 | 2020-06-18 | 株式会社村田製作所 | 電力分配器 |
WO2021085002A1 (ja) * | 2019-10-30 | 2021-05-06 | 株式会社村田製作所 | コイル部品および、これを含むフィルタ回路 |
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JP2002344276A (ja) * | 2001-05-16 | 2002-11-29 | Murata Mfg Co Ltd | 高周波電力分配・合成回路および高周波電力分配・合成部品 |
JP2011166344A (ja) * | 2010-02-08 | 2011-08-25 | Tdk Corp | 積層型電子部品 |
WO2020045576A1 (ja) * | 2018-08-30 | 2020-03-05 | 株式会社村田製作所 | 電力分配/結合回路および電力分配/結合部品 |
WO2020121985A1 (ja) * | 2018-12-12 | 2020-06-18 | 株式会社村田製作所 | 電力分配器 |
WO2021085002A1 (ja) * | 2019-10-30 | 2021-05-06 | 株式会社村田製作所 | コイル部品および、これを含むフィルタ回路 |
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