WO2015045451A1 - 電子部品及び電子回路 - Google Patents
電子部品及び電子回路 Download PDFInfo
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- WO2015045451A1 WO2015045451A1 PCT/JP2014/059855 JP2014059855W WO2015045451A1 WO 2015045451 A1 WO2015045451 A1 WO 2015045451A1 JP 2014059855 W JP2014059855 W JP 2014059855W WO 2015045451 A1 WO2015045451 A1 WO 2015045451A1
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- unbalanced
- signal
- electronic component
- balanced
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- 230000004907 flux Effects 0.000 claims abstract description 49
- 239000004020 conductor Substances 0.000 claims description 7
- 238000002955 isolation Methods 0.000 description 23
- 238000004804 winding Methods 0.000 description 18
- 238000004088 simulation Methods 0.000 description 14
- 230000004048 modification Effects 0.000 description 11
- 238000012986 modification Methods 0.000 description 11
- 230000008878 coupling Effects 0.000 description 9
- 238000010168 coupling process Methods 0.000 description 9
- 238000005859 coupling reaction Methods 0.000 description 9
- 230000006698 induction Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229910017518 Cu Zn Inorganic materials 0.000 description 1
- 229910017752 Cu-Zn Inorganic materials 0.000 description 1
- 229910017943 Cu—Zn Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 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
- H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
- H01P5/10—Coupling devices of the waveguide type for linking dissimilar lines or devices for coupling balanced lines or devices with unbalanced lines or devices
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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
- H01P5/18—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
- H01P5/184—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers the guides being strip lines or microstrips
- H01P5/187—Broadside coupled lines
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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
- H03H7/42—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
- H03H2001/0021—Constructional details
- H03H2001/0085—Multilayer, e.g. LTCC, HTCC, green sheets
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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
- H03H7/01—Frequency selective two-port networks
- H03H7/09—Filters comprising mutual inductance
Definitions
- the present invention relates to an electronic component and an electronic circuit, and more particularly to an electronic component and an electronic circuit that distribute an unbalanced signal and further convert the unbalanced signal into a balanced signal.
- an electronic component 500 in which a distributor and an unbalanced balanced converter are integrated, similar to the balanced distributor described in Patent Document 1, is divided into two parts distributed by the distributor and the distributor. It is composed of a total of three electronic elements of an unbalanced balanced converter for each input signal.
- the electronic component 500 includes unbalanced input / unbalanced output distributors (distributors) 502 and unbalanced / balanced converters (baluns) 503 and 504.
- the distributor 502 has a function of distributing the unbalanced signal input from the unbalanced terminal 505 into two and isolating the two output terminals of the distributor 502.
- the baluns 503 and 504 convert the two unbalanced signals distributed by the distributor 502 into balanced signals, respectively.
- An object of the present invention is to provide an electronic component and an electronic circuit that can reduce the number of components and reduce the size in an electronic component and an electronic circuit that distribute an unbalanced signal and further convert the unbalanced signal into a balanced signal. It is to be.
- the electronic component according to the first aspect of the present invention is A first unbalanced balanced converter including a first coil electrically connected to an input terminal of the unbalanced signal;
- a second unbalanced and balanced converter including a second coil electrically connected to the input terminal of the unbalanced signal;
- the first unbalanced balance converter and the second unbalanced balance converter are electromagnetically coupled to each other and are input to the first unbalanced balance converter and the second unbalanced balance converter. Arranged so that the magnetic fluxes generated by the signals cancel each other, It is characterized by.
- the electronic circuit according to the second aspect of the present invention is: The electronic component; A first end to which an unbalanced input signal is input, a second end connected to the first unbalanced transducer, and a third connected to the second unbalanced transducer.
- a conductor having an end; Providing It is characterized by.
- the first unbalanced-balance converter and the second unbalanced-balanced converter are electromagnetically coupled to each other, and the first unbalanced-balanced converter and It arrange
- the first unbalanced balanced converter and the unbalanced input terminal of the second unbalanced balanced converter and the unbalanced input terminal of the second unbalanced balanced converter are electrically connected.
- a large impedance is not generated for the input signal input to the second unbalanced / balanced converter, and the input signal smoothes the first unbalanced / balanced converter and the second unbalanced / balanced converter. pass.
- the magnetic flux generated thereby is input to the first unbalanced balanced converter.
- the magnetic flux is generated in the opposite direction to the magnetic flux generated by the input signal.
- the magnetic flux generated by the input signal input to the first unbalanced / balanced converter is opposite to the magnetic flux generated by the input signal input to the second unbalanced / balanced converter. Accordingly, the magnetic flux generated by the substantially opposite phase signal and the magnetic flux generated by the input signal input to the second unbalanced balanced converter are in the same direction, and thus strengthen each other.
- the first unbalanced balanced converter functions as a common mode choke coil.
- the signal cannot pass through the first unbalanced / balanced converter smoothly.
- the signal passes smoothly through the second unbalanced balanced converter based on the same principle. I can't.
- Examples of the signal that enters from the balanced output terminal include signals such as noise components and interference wave components from a transmitter connected to the unbalanced balanced converter.
- the electronic component according to the first embodiment of the present invention it is possible to suppress the signal input from the balanced output terminal side of one unbalanced balanced converter from being transmitted to the input terminal of the other unbalanced balanced converter. can do. That is, it is possible to suppress the signal that enters from the balanced output terminal side of one unbalanced converter to the output side of the other unbalanced converter.
- the function of suppressing the sneak in of the signal coming from the balanced output terminal side is a function of taking the isolation that the distributor has performed in the electronic component 500. Therefore, the electronic component according to the first embodiment of the present invention does not require a distributor because the function that the distributor has performed is added to the unbalanced / balanced converter. That is, in the electronic component according to the first embodiment of the present invention, the number of components can be reduced and the size can be reduced.
- the electronic components including the distributor and the unbalanced balanced converter can be reduced in size by reducing the number of components.
- FIG. 1 It is a figure which shows the flow of the signal in a 3rd model. It is a figure which shows the simulation result performed using the 3rd model. It is the schematic of the electronic component which is a 3rd modification. It is the schematic of the electronic component which integrated the divider
- FIG. 1 It is a figure which shows the flow of the signal in a 3rd model. It is a figure which shows the simulation result performed using the 3rd model. It is the schematic of the electronic component which is a 3rd modification. It is the schematic of the electronic component which integrated the divider
- the electronic component 1 is incorporated in an electronic circuit 100 that constitutes a part of a receiver 200 such as a television or a mobile phone.
- the electronic component 1 has a rectangular parallelepiped shape, and includes a laminated body 8, input terminals 30 and 32, output terminals 40, 41, 43 and 44, and ground terminals 42 and 45.
- the electronic component 1 includes a balun 10 (first unbalanced and balanced converter) and a balun 20 (second unbalanced and balanced converter) as shown in FIG. .
- the laminated body 8 is configured by laminating a plurality of rectangular insulating layers from the upper side to the lower side, and has a rectangular parallelepiped shape as shown in FIG.
- the insulating layer is, for example, a layer made of a magnetic material such as Ni-Cu-Zn ferrite, a layer formed by compacting metal magnetic powder whose surface is insulated, or a non-magnetic material such as a dielectric. It is a layer consisting of the body.
- the vertical direction of the stacked body 8 is defined as the z-axis direction
- the direction in which the long side extends when the stacked body 8 is viewed from the z-axis direction is defined as the x-axis direction
- the stacked body 8 is defined as The direction in which the short side extends when viewed from the z-axis direction.
- the ground terminal 42, the input terminals 30 and 32, and the ground terminal 45 are provided on the side surface on the negative direction side in the y axis direction of the stacked body 8 so as to be arranged in this order from the negative direction side in the x axis direction to the positive direction side. It has been.
- the output terminals 41, 40, 43, and 44 are provided on the side surface on the positive side in the y-axis direction of the stacked body 8 so as to be arranged in this order from the negative direction side in the x-axis direction to the positive direction side.
- the balun 10 includes two spiral coils 12 and 14 (first coil and third coil) as shown in FIG.
- the coils 12 and 14 are configured by connecting a coil conductor formed on an insulating layer and a via-hole conductor penetrating the insulating layer in the z-axis direction.
- the central axes of the coils 12 and 14 extend in the z-axis direction and are stacked so that the central axes thereof substantially coincide with each other.
- the coil 12 is located on the positive side in the z-axis direction with respect to the coil 14. Furthermore, the winding direction of the coil 12 and the winding direction of the coil 14 are the same.
- the winding direction is viewed from the coil 14 toward the coil 12 (from the negative direction side in the z-axis direction). (When viewed) is clockwise with respect to the input signal S1. Thereby, the coil 12 and the coil 14 are electromagnetically coupled. One end of the coil 12 is connected to the input terminal 30 and the other end is connected to the output terminal 40. One end of the coil 14 is connected to the output terminal 41, and the other end is connected to the ground terminal 42.
- the unbalanced input signal S1 input from the input terminal 30 passes through the coil 12 and is output from the output terminal 40.
- a signal S3 having a phase opposite to that of the input signal S1 is generated in the coil 14 by mutual induction and is output from the output terminal 41. That is, the unbalanced input signal S1 input from the input terminal 30 is output from the output terminals 40 and 41 as a balanced signal.
- the ground terminal 42 is connected to the ground electrode.
- the balun 20 is provided on the positive side in the z-axis direction with respect to the balun 10 and includes two spiral coils 22 and 24 (second coil and fourth coil).
- the coils 22 and 24 are configured by connecting a coil conductor formed on an insulating layer and a via-hole conductor penetrating the insulating layer in the z-axis direction.
- the central axes of the coils 22 and 24 extend in the z-axis direction and are stacked so that their central axes substantially coincide with each other.
- the coil 22 is located on the negative side in the z-axis direction with respect to the coil 24. Furthermore, the winding direction of the coil 22 and the winding direction of the coil 24 are the same.
- the winding direction is viewed from the coil 22 toward the coil 24 (from the negative side in the z-axis direction). (When viewed) is counterclockwise with respect to the input signal S2.
- the coil 22 and the coil 24 are electromagnetically coupled.
- One end of the coil 22 is connected to the input terminal 32, and the other end is connected to the output terminal 43.
- One end of the coil 24 is connected to the output terminal 44, and the other end is connected to the ground terminal 45.
- the unbalanced input signal S2 input from the input terminal 32 passes through the coil 22 and is output from the output terminal 43.
- a signal S4 having a phase opposite to that of the input signal S2 is generated in the coil 24 by mutual induction, and is output from the output terminal 44. That is, the unbalanced input signal S2 input from the input terminal 32 is output as a balanced signal from the output terminals 43 and 44 (coils 22 and 24).
- the ground terminal 45 is connected to the ground electrode.
- the balun 10 and the balun 20 are arranged so that they are electromagnetically coupled.
- the coil 12 of the balun 10 and the coil 22 of the balun 20 are stacked in the z-axis direction so that their center axes substantially coincide with each other and are electromagnetically coupled.
- the winding direction of the coil 12 is opposite to the winding direction of the coil 22.
- the magnetic flux B1 generated in the coil 12 by the input signal S1 and the magnetic flux B2 generated in the coil 22 by the input signal S2 face each other and cancel each other.
- no large impedance is generated with respect to the input signals S1 and S2, and the input signals S1 and S2 pass through the coils 12 and 22 smoothly.
- the magnetic flux generated thereby passes smoothly through the coil 12 because the balun 10 functions as a common mode choke coil. I can't. Even when a signal having substantially the same phase as the input signal S2 enters from the output terminal 43 of the coil 22, it cannot pass through the coil 22 by the same principle. As described above, in the electronic component 1, the sneaking of the signal that enters from the balanced output terminal side of one unbalanced / balanced converter to the output side of the other unbalanced converter is suppressed.
- the coil 14 of the balun 10 is positioned on the opposite side of the coil 22 with the coil 12 interposed therebetween, and the coil 24 of the balun 20 is positioned on the opposite side of the coil 12 with the coil 22 interposed therebetween. Therefore, the interval between the coil 14 and the coil 24 is larger than the interval between the coil 12 and the coil 14.
- the coil 14 and the coil 24 are electromagnetically coupled, and signal wraparound is also suppressed between the coil 14 and the coil 24 by the mechanism described above. That is, the coil 14 and the coil 24 also contribute to the function of taking isolation.
- the electronic circuit 100 includes the above-described electronic component 1 and a circuit board 101 as shown in FIG.
- the circuit board 101 is provided with a conductive wire 102 having three ends. Specifically, an end 102a (an input terminal for an unbalanced signal) to which the unbalanced signal S0 from the antenna A is input, an end 102b connected to the input terminal 30 of the electronic component 1, An end portion 102c connected to the input terminal 32 is provided. Therefore, the conducting wire 102 plays a role of dividing the unbalanced signal S0 from the antenna A into the unbalanced signal S1 and the unbalanced signal S2.
- the function of suppressing the wraparound of the signal is a function that the distributor 502 plays in the electronic component 500 that distributes the conventional unbalanced signal and further converts the unbalanced signal into the balanced signal. That is, in the electronic component 1, since the function which the divider
- the inventor of the present application performed a simulation in order to clarify the function of suppressing the signal wraparound of the electronic component 1, that is, the function of taking isolation between the output terminals.
- a first model corresponding to the electronic component 1 and a second model in which the electromagnetic coupling between the coils in the electronic component 1 was removed were used.
- the attenuation ratio (isolation characteristic) of the signal S6 that enters the coil 12 from the output terminal 40, wraps around the coil 22, and exits to the output terminal 43 shown in FIG. 5 was measured. Specifically, the ratio of the intensity of the signal S6 at the output terminal 43 to the signal S6 at the output terminal 40 was measured. This attenuation ratio is defined as an isolation characteristic S30.
- the attenuation ratio (isolation characteristic) of the signal S7 entering the coil 14 from the output terminal 41, wrapping around the coil 24 and exiting to the output terminal 44 was measured. Specifically, the ratio of the intensity of the signal S7 at the output terminal 44 to the intensity of the signal S7 at the output terminal 41 was measured. This attenuation ratio is defined as an isolation characteristic S41.
- FIG. 6 shows the result of the simulation performed using the second model
- FIG. 7 shows the result of the simulation performed using the first model. 6 and 7, the vertical axis represents the signal attenuation ratio (isolation characteristic), and the horizontal axis represents the frequency.
- the attenuation at each frequency of the signal S6 and the signal S7 is substantially equal, and the attenuation ratio increases as the frequency increases, but no significant effect is observed.
- the first model has a large attenuation pole in the vicinity of 1000 (MHz). That is, it was confirmed that the first model corresponding to the electronic component 1 has a function of suppressing signal wraparound, that is, a function of isolating output terminals.
- the balun 10 and the balun 20 are stacked in the z-axis direction, whereas in the electronic component 1A, as shown in FIG. Are arranged in a direction perpendicular to the z-axis direction so that the axial directions of the coils are substantially in the same direction.
- the coil 12 and the coil 22 are formed on one insulating layer, and the coil 14 and the coil 24 are formed on the same plane among the plurality of insulating layers constituting the stacked body 8. It is desirable because it can be more easily manufactured.
- the coil 22 is located on the positive side in the z-axis direction with respect to the coil 24. Furthermore, the winding direction of the coil 22 and the winding direction of the coil 24 are the same, and when viewed from the coil 24 toward the coil 22 (viewed from the negative direction side in the z-axis direction), a clock is applied to the input signal S2.
- the coil 12, the coil 14, the coil 22, and the coil 24 are all clockwise with respect to the input signals S1 and S2 when viewed from the negative direction side in the z-axis direction.
- One end of the coil 22 is connected to the input terminal 32, and the other end is connected to the output terminal 43.
- One end of the coil 24 is connected to the output terminal 44, and the other end is connected to the ground terminal 45.
- a magnetic flux B1 is generated in the coils 12 and 14 of the balun 10 toward the positive side in the z-axis direction by the input signal S1. Then, the magnetic flux B ⁇ b> 1 once exits from one end surface of the coil 12, makes a U-turn, and moves toward the other end surface of the coil 12. In this path, the magnetic flux B1 passes through the coil of the balun 20 toward the negative side in the z-axis direction. In addition, a magnetic flux B2 is generated in the coils 22 and 24 of the balun 20 toward the positive side in the z-axis direction by the input signal S2.
- the magnetic flux B ⁇ b> 2 once exits from one end surface of the coil 22, makes a U-turn, and moves toward the other end surface of the coil 22.
- the magnetic flux B2 passes through the coil of the balun 10 toward the negative side in the z-axis direction. Therefore, in the electronic component 1A, the magnetic flux B1 generated by the input signal S1 and the magnetic flux B2 generated by the input signal S2 face each other and cancel each other. As a result, no large impedance is generated with respect to the input signals S1 and S2, and the input signals S1 and S2 pass through the coils 12 and 22 smoothly.
- the magnetic flux B5 generated thereby is opposite to the magnetic flux B1. That is, as shown in FIG. 9, the magnetic flux B5 is a magnetic flux that travels in the coils 12, 14 of the balun 10 toward the negative direction side in the z-axis direction. Then, the magnetic flux B5 exits from the other end surface of the coil 12 and passes through the coil of the balun 20 toward the positive side in the z-axis direction in a path toward the one end surface of the coil 12 after making a U-turn. To do.
- the magnetic flux B5 generated by the signal S5 and the magnetic flux B2 generated by the input signal S2 become magnetic fluxes in the same direction, and therefore strengthen each other.
- a large impedance is generated for the signal S5, and the signal S5 cannot pass through the coil 12 smoothly.
- the magnetic flux generated thereby passes smoothly through the coil 12 because the balun 10 functions as a common mode choke coil. I can't. Even when a signal having substantially the same phase as the input signal S2 enters from the output terminal 43 of the coil 22, it cannot pass through the coil 22 by the same principle.
- the sneaking of the signal that enters from the balanced output terminal side of one unbalanced / balanced converter to the output side of the other unbalanced converter is suppressed.
- the electronic component 1A can be reduced in size by reducing the number of components.
- the coil 14 and the coil 24 are electromagnetically coupled, and the signal wraparound is also suppressed between the coil 14 and the coil 24 by the mechanism described above. That is, the coil 14 and the coil 24 in the electronic component 1A also contribute to the function of isolating.
- the balun 10 of the electronic component 1B has a coil 16 (fifth coil) connected in series with the coil 12 between the coil 12 (first coil) and the output terminal 40, as shown in FIG. . Further, a coil 18 (sixth coil) connected in series with the coil 14 is provided between the coil 14 (third coil) and the output terminal 41.
- the coils 16 and 18 are stacked so that their central axes substantially coincide with each other.
- the winding direction of the coil 16 and the winding direction of the coil 18 are the same. In this embodiment, when viewed from the direction from the coil 16 to the coil 18, the winding direction is a timepiece with respect to the input signal S 1.
- the winding direction is a timepiece with respect to the input signal S 1.
- the unbalanced input signal S1 input from the input terminal 30 passes through the coil 12 and the coil 16, and is output from the output terminal 40.
- a signal S3 having a phase opposite to that of the input signal S1 is generated in the coil 14 and the coil 18, and is output from the output terminal 41. That is, the unbalanced input signal S1 input from the input terminal 30 is output from the output terminals 40 and 41 as a balanced signal.
- the balun 20 of the electronic component 1B includes a coil 26 (seventh coil) connected in series with the coil 22 between the coil 22 (second coil) and the output terminal 43, as shown in FIG.
- a coil 28 (eighth coil) connected in series with the coil 24 is provided between the coil 24 (fourth coil) and the output terminal 44.
- the coils 26 and 28 are stacked so that their central axes substantially coincide with each other.
- the winding direction of the coil 26 and the winding direction of the coil 28 are the same. In this embodiment, the winding direction is opposite to the input signal S2 when viewed from the direction from the coil 28 to the coil 26. Clockwise.
- the unbalanced input signal S ⁇ b> 2 input from the input terminal 32 passes through the coil 22 and the coil 26 and is output from the output terminal 43.
- a signal S4 having a phase opposite to that of the input signal S2 is generated in the coil 24 and the coil 28 by mutual induction, and is output from the output terminal 44. That is, the unbalanced input signal S2 input from the input terminal 30 is output from the output terminals 43 and 44 as a balanced signal.
- the coils 12, 14 of the balun 10 and the coils 22, 24 of the balun 20 are arranged so as to be electromagnetically coupled.
- the coils 16 and 18 of the balun 10 and the coils 26 and 28 of the balun 20 are disposed so as to be electromagnetically coupled.
- the coil 18 of the balun 10 and the coil 28 of the balun 20 are stacked so that their center axes substantially coincide with each other. Further, the winding direction of the coil 18 is opposite to the winding direction of the coil 28.
- the magnetic flux B7 generated thereby is opposite to the magnetic flux B3. Therefore, as shown in FIG. 11, the magnetic flux B4 and the magnetic flux B7 generated in the coil 28 by the signal S4 become magnetic fluxes in the same direction, and thus strengthen each other. As a result, an impedance is generated with respect to the signal S8, and the signal S8 cannot pass through the coil 18 smoothly. Even when a signal substantially in phase with the signal S4 enters from the output terminal 44 of the coil 28, the coil 28 cannot pass smoothly on the same principle.
- the magnetic flux generated thereby passes smoothly through the coil 18 because the balun 10 functions as a common mode choke coil. I can't. Even when a signal having substantially the same phase as the signal S4 enters from the output terminal 44 of the coil 28, it cannot pass through the coil 28 on the same principle.
- the signal entering from the balanced output terminal side of one unbalanced / balanced converter is prevented from wrapping around to the output side of the other unbalanced converter.
- the electronic component 1B is further excellent in isolation characteristics as compared with the electronic component 1. Specifically, in the electronic component 1, since the distance between the coil 12 and the coil 22 is shorter than the distance between the coil 14 and the coil 24, the electromagnetic coupling between the coil 12 and the coil 22, A difference occurs in electromagnetic coupling between the coils 24. As a result, as shown in the simulation result shown in FIG. 7, the electronic component 1 has a difference between the isolation characteristic S ⁇ b> 30 and the isolation characteristic 41.
- the distance between the coil 18 connected to the coil 14 and the coil 28 connected to the coil 24 is equal to the coil 16 connected to the coil 12 and the coil connected to the coil 22. Smaller than 26. Therefore, the electromagnetic coupling between the coil 18 and the coil 28 is stronger than the electromagnetic coupling between the coil 16 and the coil 26. Further, the electromagnetic coupling between the coil 12 and the coil 22 is stronger than the electromagnetic coupling between the coil 14 and the coil 24. Thereby, in the electronic component 1 ⁇ / b> B, it is possible to obtain an isolation characteristic with a better balance as compared with the electronic component 1.
- the present inventor performed a simulation using a third model corresponding to the electronic component 1B in order to confirm the well-balanced isolation characteristics of the electronic component 1B.
- the attenuation ratio (isolation characteristic) of the signal S10 entering the coil 18 from the output terminal 41, wrapping around the coil 24 via the coil 14, and exiting to the output terminal 44 of the coil 28 was measured. .
- the ratio of the intensity of the signal S10 at the output terminal 44 to the intensity of the signal S10 connected to the output terminal 41 was measured.
- This attenuation ratio is defined as an isolation characteristic S41B.
- FIG. 13 shows the results of a simulation performed using the third model.
- the vertical axis shows the signal attenuation ratio (isolation characteristic), and the horizontal axis shows the frequency. .
- the attenuation at each frequency of the signal S9 and the signal S10 is substantially equal and has a large attenuation pole in the vicinity of 1000 (MHz). Further, the attenuation ratio at the pole of the isolation characteristic S30B is substantially equal to the attenuation ratio at the pole of the isolation characteristic S41B. This shows an isolation characteristic with good balance that the electronic component 1B has.
- the difference between the electronic component 1 ⁇ / b> C according to the third modified example and the electronic component 1 is that the terminals that were the output terminals 40 and 43 in the electronic component 1 are connected to the ground electrode, and the electronic component 1.
- the balanced signal is output from the terminals which are the ground terminals 42 and 45 in FIG.
- Other configurations of the electronic component 1 ⁇ / b> C are the same as those of the electronic component 1. Therefore, the description other than the connection relationship of the terminals is as described in the electronic component 1.
- the electronic component and the electronic circuit according to the present invention are not limited to the above-described embodiments, and can be variously modified within the scope of the gist thereof.
- the input terminals 30 and 32, the output terminals 40, 41, 43, and 44 and the ground terminals 42 and 45 are not limited to the arrangement as shown in FIG.
- the ground terminal 42, the input terminals 30 and 32, and the ground terminal 45 are arranged in the order of the input terminal 30, the ground terminal 42, the ground terminal 45, and the input terminal 32 from the negative direction side to the positive direction side in the x-axis direction.
- the laminated body 8 may be provided on the side surface on the negative direction side in the y-axis direction, and the output terminals 41, 40, 43, and 44 are output terminals 40, outputs from the negative direction side to the positive direction side in the x-axis direction.
- the laminated body 8 may be provided on the side surface on the positive side in the y-axis direction so that the terminal 41, the output terminal 44, and the output terminal 43 are arranged in this order.
- the coils need not be arranged in the order of the coil 14, the coil 12, the coil 22, and the coil 24 from the negative z-axis direction to the positive direction.
- Coil 12, coil 14, coil 24, and coil 22 may be arranged in this order.
- each balun is not limited to two or four, but may be three or more. Further, the number of baluns may be two or more according to the number of dividing the unbalanced input. Furthermore, as long as each balun is electromagnetically coupled and the magnetic fluxes generated by the input signals are arranged to cancel each other, all the coils in each balun may be arranged on the same plane.
- the input terminal 30 and the input terminal 32 may be configured by one input terminal. In this case, it is not necessary to branch the conducting wire 102 in the electronic circuit 100.
- the input terminals 30, 32, the output terminals 40, 41, 43, 44, the ground are output so that the balanced signals are output from the coils 14 and 18, and the balanced signals are output from the coils 24, 28.
- Terminals 42 and 45 may be connected. Specifically, the output terminals 40 and 43 are grounded. Then, a signal having the same phase as the unbalanced signal is output from the terminal that was the ground terminal 42, and a signal having an opposite phase to the unbalanced signal is output from the output terminal 41. A signal having the same phase as the unbalanced signal is output from the terminal that was the ground terminal 45, and a signal having an opposite phase to the unbalanced signal is output from the output terminal 44.
- the present invention is useful for electronic components and electronic circuits that distribute unbalanced signals and convert unbalanced signals into balanced signals, and can reduce the number of components and achieve miniaturization. Is excellent.
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Abstract
Description
不平衡信号の入力端子と電気的に接続された第1のコイルを含む第1の不平衡平衡変換器と、
前記不平衡信号の入力端子と電気的に接続された第2のコイルを含む第2の不平衡平衡変換器と、
を備え、
第1の不平衡平衡変換器及び第2の不平衡平衡変換器は、互いに電磁気的に結合し、かつ、第1の不平衡平衡変換器及び第2の不平衡平衡変換器に入力された入力信号により発生する磁束が互いに打ち消されるように配置されていること、
を特徴とする。
前記電子部品と、
不平衡入力信号が入力される第1の端部、第1の不平衡平衡変換器と接続されている第2の端部、及び第2の不平衡平衡変換器に接続されている第3の端部を有する導線と、
を備えること、
を特徴とする。
一実施例に係る電子部品1及び電子回路100について図面を参照しながら説明する。電子部品1は、図1に示すように、テレビや携帯電話などの受信機200の一部を構成している電子回路100に組み込まれている。電子部品1は、図2に示すように、直方体状であり、積層体8、入力端子30,32及び出力端子40,41,43,44、グランド端子42,45を備えている。更に、電子部品1は、積層体8の内部に、図3に示すように、バラン10(第1の不平衡平衡変換器)及びバラン20(第2の不平衡平衡変換器)を備えている。
一実施例に係る電子部品1では、上述の通り、出力端子から進入してきた信号に対して大きなインピーダンスが発生し、信号の回り込みを抑制している。ここで、信号の回り込みを抑制するという機能は、従来の不平衡信号を分配して、さらに不平衡信号を平衡信号に変換する電子部品500において分配器502が担っていた機能である。つまり、電子部品1では、バラン10,20に対して、分配器502が担っていた機能を付与しているため、分配器502が不要である。つまり、電子部品1では、部品点数を減らし小型化を図ることができる。
第1変形例に係る電子部品1Aと電子部品1との相違点は、バラン10とバラン20との相対的な位置関係、及びバラン20に含まれるコイル22,24の構成である。電子部品1Aにおける他の構成は、電子部品1と同様である。従って、バラン10とバラン20との相対的な位置関係、及びバラン20に含まれるコイル22,24の構成以外の説明は、電子部品1での説明のとおりである。
第2変形例に係る電子部品1Bと電子部品1との相違点は、バラン10及びバラン20に含まれるコイルの個数及びそれらの構成である。電子部品1Bにおける他の構成は、電子部品1と同様である。従って、バラン10及びバラン20に含まれるコイルの個数及びそれらの構成以外の説明は、電子部品1での説明のとおりである。
第3変形例に係る電子部品1Cと電子部品1との相違点は、図14に示されるように、電子部品1において出力端子40,43であった端子がグランド電極と接続され、電子部品1においてグランド端子42,45であった端子から平衡信号が出力される点である。電子部品1Cにおける他の構成は、電子部品1と同様である。従って、上記端子の接続関係以外の説明は、電子部品1での説明のとおりである。
本発明に係る電子部品及び電子回路は前記実施例に限定するものではなく、その要旨の範囲内で種々に変更することができる。例えば、実施例1および変形例1ないし3において、入力端子30、32および出力端子40,41,43,44、グランド端子42,45は、図2に示すような、配列に限定されない。例えば、グランド端子42、入力端子30,32、及びグランド端子45は、x軸方向の負方向側から正方向側へと入力端子30、グランド端子42、グランド端子45、入力端子32の順に並ぶように、積層体8のy軸方向の負方向側の側面に設けてもよく、出力端子41,40,43,44は、x軸方向の負方向側から正方向側へと出力端子40、出力端子41、出力端子44、出力端子43の順に並ぶように、積層体8のy軸方向の正方向側の側面に設けられていてもよい。また、コイルの配置は、図3に示すように、z軸の負の方向から正の方向にコイル14、コイル12、コイル22、コイル24の順で並んで配置されてなくてもよく、例えば、コイル12、コイル14、コイル24、コイル22の順に配置されていてもよい。
S1,S2 不平衡信号
1,1A,1B,1C 電子部品
12,14,16,18,22,24,26,28 コイル(第1のコイル~第8のコイル)
10,20 バラン(不平衡平衡変換器)
30,32 入力端子
100 電子回路
102 導線
102a~102c 端部(第1の端部(不平衡信号の入力端子)、第2の端部、第3の端部)
Claims (10)
- 不平衡信号の入力端子と電気的に接続された第1のコイルを含む第1の不平衡平衡変換器と、
前記不平衡信号の入力端子と電気的に接続された第2のコイルを含む第2の不平衡平衡変換器と、
を備え、
第1の不平衡平衡変換器及び第2の不平衡平衡変換器は、互いに電磁気的に結合し、かつ、第1の不平衡平衡変換器及び第2の不平衡平衡変換器に入力された入力信号により発生する磁束が互いに打ち消されるように配置されていること、
を特徴とする電子部品。 - 前記第1のコイルと前記第2のコイルとは、該第1のコイル及び該第2のコイルに入力された入力信号により発生する磁束が互いに打ち消されるように配置されていること、
を特徴とする請求項1に記載の電子部品。 - 前記第1のコイルと前記第2のコイルとは、それらのコイルの中心軸が略一致するように積み重ねられていること、
を特徴とする請求項2に記載の電子部品。 - 前記第1のコイルと前記第2のコイルとは、それらのコイルの軸方向が略一致するように同一平面上に位置すること、
を特徴とする請求項2に記載の電子部品。 - 前記第1の不平衡平衡変換器は、前記第1のコイルと電磁気的に結合する第3のコイルを更に含み、
前記第2の不平衡平衡変換器は、前記第2のコイルと電磁気的に結合する第4のコイルを更に含み、
前記第1のコイル及び前記第3のコイルからは平衡信号が出力され、
前記第2のコイル及び前記第4のコイルからは平衡信号が出力されること、
を特徴とする請求項1ないし請求項4のいずれかに記載の電子部品。 - 前記第1の不平衡平衡変換器は、前記第1のコイルと電磁気的に結合する第3のコイルを更に含み、
前記第2の不平衡平衡変換器は、前記第2のコイルと電磁気的に結合する第4のコイルを更に含み、
前記第3のコイルの両端から平衡信号が出力され、
前記第4のコイルの両端から平衡信号が出力されること、
を特徴とする請求項1ないし請求項4のいずれかに記載の電子部品。 - 前記第1の不平衡平衡変換器は、不平衡信号の入力端子と電気的に接続された第1のコイル、該第1のコイルと直列に接続された第5のコイル、該第1のコイルと電磁気的に結合する第3のコイル及び該第3のコイルと直列接続され、かつ、該第5のコイルと電磁気的に結合する第6のコイルを有し、
前記第2の不平衡平衡変換器は、前記不平衡信号の入力端子と電気的に接続された第2のコイル、該第2のコイルと直列に接続された第7のコイル、該第2のコイルと電磁気的に結合する第4のコイル及び該第4のコイルと直列接続され、かつ、該第7のコイルと電磁気的に結合する第8のコイルを有し、
前記第1のコイルと前記第2のコイルとは、互いに電磁気的に結合し、かつ、それらに入力された入力信号により発生する磁束が互いに打ち消されるように配置され、
前記第6のコイルと前記第8のコイルとは、互いに電磁気的に結合し、かつ、それらに入力された入力信号により発生する磁束が互いに打ち消されるように配置されていること、
を特徴とする請求項1に記載の電子部品。 - 前記第5のコイル及び前記第6のコイルからは平衡信号が出力され、
前記第7のコイル及び前記第8のコイルからは平衡信号が出力されること、
を特徴とする請求項7に記載の電子部品。 - 前記第3のコイル及び前記第6のコイルから平衡信号が出力され、
前記第4のコイル及び前記第8のコイルから平衡信号が出力されること、
を特徴とする請求項7に記載の電子部品。 - 請求項1乃至請求項9のいずれかに記載の電子部品と、
不平衡入力信号が入力される第1の端部、第1の不平衡平衡変換器と接続されている第2の端部、及び第2の不平衡平衡変換器に接続されている第3の端部を有する導線と、
を備えること、
を特徴とする電子回路。
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