WO2014171266A1 - インダクタ素子、インダクタブリッジおよび高周波フィルタ - Google Patents
インダクタ素子、インダクタブリッジおよび高周波フィルタ Download PDFInfo
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- WO2014171266A1 WO2014171266A1 PCT/JP2014/057976 JP2014057976W WO2014171266A1 WO 2014171266 A1 WO2014171266 A1 WO 2014171266A1 JP 2014057976 W JP2014057976 W JP 2014057976W WO 2014171266 A1 WO2014171266 A1 WO 2014171266A1
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- conductor pattern
- inductor element
- inductor
- coil
- conductor
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- 239000004020 conductor Substances 0.000 claims abstract description 164
- 239000000758 substrate Substances 0.000 claims abstract description 18
- 238000004804 winding Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 21
- 230000002093 peripheral effect Effects 0.000 claims description 20
- 230000004907 flux Effects 0.000 abstract description 10
- 238000005452 bending Methods 0.000 abstract description 6
- 239000011347 resin Substances 0.000 description 23
- 229920005989 resin Polymers 0.000 description 23
- 230000000052 comparative effect Effects 0.000 description 17
- 238000010586 diagram Methods 0.000 description 11
- 239000010410 layer Substances 0.000 description 11
- 229920000106 Liquid crystal polymer Polymers 0.000 description 9
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 description 9
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 238000003780 insertion Methods 0.000 description 5
- 239000011229 interlayer Substances 0.000 description 5
- 239000013256 coordination polymer Substances 0.000 description 4
- 238000010030 laminating Methods 0.000 description 4
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
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Classifications
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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
-
- 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
- H03H7/0115—Frequency selective two-port networks comprising only inductors and capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
-
- 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
- H03H7/17—Structural details of sub-circuits of frequency selective networks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F2017/006—Printed inductances flexible printed inductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F2017/0073—Printed inductances with a special conductive pattern, e.g. flat spiral
-
- 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
-
- 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
- H03H2001/0078—Constructional details comprising spiral inductor on a substrate
-
- 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
- H03H2001/0092—Inductor filters, i.e. inductors whose parasitic capacitance is of relevance to consider it as filter
Definitions
- the present invention relates to an inductor element configured on an insulating substrate, an inductor bridge including the inductor element, and a high frequency filter.
- a general inductor element is configured as a chip inductor mounted on a circuit board, or incorporated in a circuit by forming a conductor pattern of the inductor on the circuit board.
- Patent Document 1 discloses a multilayer inductor provided with a plurality of insulator layers in which a coil having a conductor pattern is formed.
- DCR direct current resistance
- the frequency band that can be used as an inductor is narrowed.
- the bandwidth when used as a high frequency filter is narrowed.
- an object of the present invention is to provide an inductor element having a small DCR, a small DCR and a high self-resonance frequency, and an inductor bridge and a high-frequency filter including the inductor element.
- An inductor element of the present invention includes an insulating base and a coil having a conductor pattern formed on the insulating base, and the coils are juxtaposed on the same plane and connected in series.
- the winding direction and connection relationship of each coil are determined so that a closed magnetic circuit is formed by adjacent coils on the same plane (a magnetic flux that links adjacent coils in the plane direction forms a loop).
- the insulating base material is bent at an angle within a range of 180 ° to 90 ° between the coils adjacent to each other in the plane direction.
- the characteristic change due to bending is reduced as compared with the case of a single coil. Moreover, the effect by forming a closed magnetic circuit can be maintained.
- the coil is preferably formed across a plurality of layers. Thereby, the area required for forming the inductor element can be suppressed.
- the coil includes a line-shaped conductor pattern for connecting the coils of the plurality of coils, and the line-shaped conductor pattern is formed by a coil connected by the line-shaped conductor pattern.
- the insulating substrate is arranged so that the line-shaped conductor pattern is on the inner peripheral side of the layer formed with the coil connected by the line-shaped conductor pattern.
- the material is preferably bent. With such a structure, it is possible to prevent disconnection of the line-shaped conductor pattern due to the tensile stress at the time of bending.
- An inductor bridge according to the present invention includes the inductor element according to any one of (1) to (3), and includes a conductive member that conducts to the inductor element on the insulating base.
- a high frequency filter according to the present invention includes the inductor element according to any one of (1) to (3), and includes a self-resonant frequency determined by inductance and stray capacitance by the plurality of coils in a stop band.
- the present invention has the following effects.
- FIG. 1A is an external perspective view of the inductor element 101 according to the first embodiment
- FIG. 1B is an exploded perspective view thereof
- FIG. 1C is an equivalent circuit diagram thereof.
- FIG. 2A is a cross-sectional view showing the relationship between the current flowing through the conductor pattern of the inductor element 101 and the magnetic field generated thereby.
- FIG. 2B is a cross-sectional view showing a relationship between a current flowing through a conductor pattern of an inductor element as a comparative example and a magnetic field generated thereby.
- FIG. 3A is a diagram showing the self-inductance and the mutual inductance due to the conductor patterns 31 and 32 of the inductor element 101.
- FIG. 1A is an external perspective view of the inductor element 101 according to the first embodiment
- FIG. 1B is an exploded perspective view thereof
- FIG. 1C is an equivalent circuit diagram thereof.
- FIG. 2A is a cross-sectional view showing the relationship between the current flowing through the conductor pattern of
- FIG. 3B is a diagram showing self-inductance and mutual inductance due to the conductor patterns 31 and 32 of the inductor element of the comparative example.
- FIG. 4 is a diagram showing the frequency characteristics of the insertion loss (S21) of the inductor element.
- FIG. 5A is a cross-sectional view showing the relationship between the magnetic field generated by the conductor pattern of the inductor element 101 and the conductor.
- FIG. 5B is a cross-sectional view showing the relationship between the magnetic field generated by the conductor pattern of the inductor element as a comparative example and the conductor.
- FIG. 6 is a perspective view showing a state where the inductor element 101 is bent.
- FIG. 7A is a cross-sectional view showing the relationship between the current flowing in the conductor pattern of the inductor element 101 and the generated magnetic field.
- FIG. 7B is a cross-sectional view showing a relationship between a current flowing in a conductor pattern of an inductor element as a comparative example and a generated magnetic field.
- FIG. 8 is an exploded perspective view of the inductor element 102 according to the second embodiment.
- FIG. 9 is a perspective view of the circuit board 200 and the high-frequency circuit module 110 disposed in the casing of the electronic device.
- FIG. 10 is an exploded perspective view of the inductor element 104 according to the fourth embodiment.
- FIG. 11 is an exploded perspective view of the inductor element 105 according to the fifth embodiment.
- FIG. 12A is an external perspective view of an inductor bridge 120 according to the sixth embodiment, and FIG. 12B is an exploded perspective view thereof.
- FIG. 13 is a perspective view showing an application example of the inductor bridge 120.
- FIG. 14 is a diagram illustrating a structure inside the housing of the electronic device 400 according to the seventh embodiment, and is a plan view in a state where the upper housing 191 and the lower housing 192 are separated and the inside is exposed. is there.
- FIG. 1A is an external perspective view of the inductor element 101 according to the first embodiment
- FIG. 1B is an exploded perspective view thereof.
- the resist film is excluded.
- FIG. 1C is an equivalent circuit diagram of the inductor element 101 according to the first embodiment.
- the inductor element 101 is an inductor element in which terminal electrodes 21 and 22 are formed on the element body 10 and the terminal electrodes 21 and 22 are connected to a predetermined circuit.
- This inductor element is used, for example, as a high frequency filter, in particular as a band rejection filter or a low pass filter.
- the element body 10 is configured by laminating liquid crystal polymer (LCP) resin base materials 11 and 12, for example.
- the resin base material 11 is formed with rectangular spiral (coiled) conductor patterns 31 and 32.
- the coils of the conductor patterns 31 and 32 have their coil axes oriented in a direction perpendicular to the surface of the resin base material 11 (a direction perpendicular to the main surface of the element body 10).
- the resin base material 12 has a line-shaped conductor pattern 33 formed thereon.
- the first end of the conductor pattern 33 is connected to the inner peripheral end of the conductor pattern 31 via a via conductor (interlayer connection conductor), and the second end of the conductor pattern 33 is connected to the inner peripheral end of the conductor pattern 32 via a via conductor. ing.
- Most of the conductor pattern 33 constitutes a coil together with the conductor pattern 32.
- the outer peripheral end of the conductor pattern 31 is drawn to the terminal electrode 21, and the outer peripheral end of the conductor pattern 32 is drawn to the terminal electrode 22.
- inductors L1 and L2 correspond to inductance components of the conductor patterns 31 and 32.
- the capacitors C1 and C2 correspond to the capacitance generated between the conductor patterns 31 and 32.
- FIG. 2A is a cross-sectional view showing the relationship between the current flowing through the conductor pattern of the inductor element 101 and the magnetic field generated thereby.
- FIG. 2B is a cross-sectional view showing a relationship between a current flowing through a conductor pattern of an inductor element as a comparative example and a magnetic field generated thereby.
- the distribution of the magnetic field generated by the coiled conductor patterns 31 and 32 is represented by lines of magnetic force.
- the direction of current is indicated by a dot symbol and a cross symbol.
- inductor element 101 of the present invention as shown in FIG. 2A, magnetic lines of force that circulate adjacent conductor patterns in common are generated. That is, a closed magnetic circuit is partially formed by adjacent conductor patterns. For this reason, the coils formed by the conductor patterns 31 and 32 are coupled in the direction in which the magnetic fields generated in them are strengthened.
- the winding direction of the conductor pattern 31 and the conductor pattern 32 is the same.
- the inductor element of this comparative example as shown in FIG. 2 (B), no magnetic field lines that circulate adjacent conductor patterns in common are generated, and the magnetic flux passing through the coil opening of the coil by the conductor pattern 31 and the conductor pattern 32.
- the magnetic flux passing through the coil opening of the coil is directed in the same direction. That is, the two coils formed by the conductor patterns 31 and 32 form an open magnetic circuit. Therefore, the coils formed by the coiled conductor patterns 31 and 32 weaken the magnetic fields generated in them.
- FIG. 3A is a diagram showing self-inductance and mutual inductance due to the conductor patterns 31 and 32 of the inductor element 101.
- FIG. 3B is a diagram showing the self-inductance and the mutual inductance due to the conductor patterns 31 and 32 of the inductor element of the comparative example.
- FIG. 3C is a diagram showing a case where a coil having a single coil opening is formed of a conductor pattern.
- Inductors L1 and L2 correspond to conductor patterns 31 and 32, and ports P1 and P2 correspond to terminal electrodes 21 and 22, respectively.
- the inductance between the ports P1 and P2 of the inductor element 101 of the present invention is represented by L1 + L2 + 2M.
- the inductance between the ports P1 and P2 of the inductor element of the comparative example is represented by L1 + L2-2M.
- the coupling coefficient is represented by k
- the two coils of the conductor patterns 31 and 32 are coupled in the direction of increasing the inductance, so that the inductance between the ports P1 and P2 is high.
- the inductor element is constituted by a plurality of coils connected in series as in the inductor element of the present invention, the potential difference applied between adjacent lines is small, so that the substantial stray capacitance generated between the lines is small.
- the stray capacitance generated in each coil is connected in series, the overall substantial stray capacitance (synthetic capacitance) is reduced. Therefore, according to the inductor element of the present invention, the self-resonant frequency due to the inductance and stray capacitance of the inductor element is high.
- FIG. 4 is a diagram showing the frequency characteristics of the insertion loss (S21) of the inductor element.
- a characteristic curve IL1 is a characteristic of an inductor element of a comparative example constituted by a single coil
- a characteristic curve IL2 is a characteristic of the inductor element 101 of the present invention.
- the frequency fs1 is the self-resonant frequency of the inductor element of the comparative example
- the frequency fs2 is the self-resonant frequency of the inductor element 101 of the present invention.
- the inductor element 101 of the present invention has a higher self-resonance frequency than the inductor element of the comparative example, as shown in FIG. Therefore, when this inductor element is used as a band rejection filter or a low-pass filter that removes a noise component, noise in a higher frequency band can be removed.
- the Q value is reduced and the attenuation bandwidth is widened by configuring a large inductance corresponding to the small stray capacitance. Therefore, when used as a band rejection filter for removing noise components, a wider rejection bandwidth can be obtained.
- the inductor element 101 of the present invention since the inductor element 101 of the present invention has a smaller DCR (direct current resistance) than the inductor element of the comparative example, the insertion loss is small over the entire frequency band. Therefore, signal attenuation is suppressed. Further, when the insertion loss in the frequency band of the signal is set as a reference (0 dB), as shown in FIG. 4, the insertion loss at the self-resonant frequency can be greatly increased by the inductor element 101 of the present invention.
- DCR direct current resistance
- an inductor having an inductance of 500 nH when applied to a transmission line that transmits a UHF band signal, an inductor having an inductance of 500 nH can be configured, and the impedance between two ports can be set to several hundred ⁇ to several k ⁇ in a frequency band of 700 MHz to 1 GHz. Due to this characteristic, noise in the frequency band can be reflected.
- the high frequency filter of the present invention is useful as a UHF band filter.
- FIG. 5A is a cross-sectional view showing the relationship between the magnetic field generated by the current flowing through the conductor pattern of the inductor element 101 and the conductor.
- FIG. 5B is a cross-sectional view showing the relationship between the magnetic field generated by the current flowing through the conductor pattern of the inductor element as a comparative example and the conductor.
- the distribution of the magnetic field generated by the coiled conductor patterns 31 and 32 is represented by lines of magnetic force.
- the direction of current is indicated by a dot symbol and a cross symbol.
- the magnetic field generated by the coil conductor pattern forms an open magnetic circuit. Therefore, if a conductor CP made of a nonmagnetic metal such as a shield plate of a liquid crystal panel or a battery is close to the conductor CP, Flows, loss occurs and inductance decreases.
- the magnetic field generated by the coil conductor pattern forms a closed magnetic circuit, so that even if the conductor CP is close, it is not easily affected. That is, unnecessary coupling by the adjacent conductor is suppressed. Therefore, it can also arrange
- FIG. 6 is a perspective view showing a state where the inductor element 101 is bent.
- the resist film is excluded.
- the inductor element 101 is bent between a coil formed by the conductor pattern 31 and a coil formed by the conductor pattern 32.
- there are few conductor patterns between the coils and it is easy to bend.
- the deformation of the coil portion can be suppressed by the rigidity of the conductor patterns 31 and 32, and the characteristic change due to the deformation of the coil portion can be suppressed.
- FIG. 7A is a cross-sectional view showing the relationship between the current flowing in the conductor pattern of the inductor element 101 and the generated magnetic field.
- FIG. 7B is a cross-sectional view showing a relationship between a current flowing in a conductor pattern of an inductor element as a comparative example and a generated magnetic field.
- the magnetic field distribution generated by the conductor pattern forming a single coil is represented by magnetic lines of force.
- the direction of current is indicated by a dot symbol and a cross symbol.
- the conductor patterns 31 and 32 are coupled mainly at portions adjacent to each other, the coupling coefficient of the two coils is large even in the bent state. Does not change. Therefore, the change in inductance due to bending is small. Further, the state in which the closed magnetic circuit is partially formed by the adjacent coils by the conductor patterns 31 and 32 is maintained even if it is bent. However, in an extremely bent state where the minor angle is less than 90 °, the conductor is likely to be affected by the conductor when it is brought close to it, so that the angle of bending is 180 ° to 90 °. It is preferable that the angle is in the range of up to °.
- FIG. 8 is an exploded perspective view of the inductor element 102 according to the second embodiment.
- the inductor element 102 is an inductor element in which terminal electrodes 21 and 22 are formed on the element body 10 and the terminal electrodes 21 and 22 are connected to a predetermined circuit.
- the element body 10 is configured by laminating liquid crystal polymer (LCP) resin base materials 11 and 12, for example.
- the resin substrate 11 is formed with rectangular spiral (coiled) conductor patterns 31, 32, 34, and 35.
- the coil formed of the conductor patterns 31, 32, 34, and 35 has a coil axis that is perpendicular to the surface of the resin base 11 (perpendicular to the main surface of the element body 10).
- the resin base material 12 has line-shaped conductor patterns 33 and 36 formed thereon.
- the first end of the conductor pattern 33 is connected to the inner peripheral end of the conductor pattern 31 via a via conductor (interlayer connection conductor), and the second end of the conductor pattern 33 is connected to the inner peripheral end of the conductor pattern 32 via a via conductor.
- the first end of the conductor pattern 36 is connected to the inner peripheral end of the conductor pattern 34 via the via conductor
- the second end of the conductor pattern 36 is connected to the inner peripheral end of the conductor pattern 35 via the via conductor.
- the arrow in FIG. 8 shows an example of the direction of the current flowing through each conductor pattern at a certain moment.
- the magnetic flux passing through the coil opening of the coil by the conductor patterns 31 and 34 is downward, and the magnetic flux passing through the coil opening of the coil by the conductor patterns 32 and 35 is upward.
- magnetic lines of force that circulate adjacent conductor patterns in common are generated. That is, a closed magnetic circuit is partially formed by a set of adjacent coils. For this reason, the magnetic fields generated in the adjacent coils are coupled in a direction in which they strengthen each other.
- FIG. 9 is a perspective view of the circuit board 200 and the high-frequency circuit module 110 disposed in the casing of the electronic device.
- the high-frequency circuit module 110 is made of a liquid crystal polymer (LCP) resin base material, and the antenna unit 110a, the component mounting unit 110b, and the inductor unit 110c are configured as an integrated laminate.
- the antenna unit 110a functions as a multiband antenna by forming an antenna element pattern 91 on the element body 10.
- the component mounting unit 110b is configured by a component such as an RFIC mounted on the element body 10 to constitute a high frequency circuit.
- the inductor section 110c has a conductor pattern similar to the conductor pattern shown in FIG. 8, and acts as an inductor element.
- the antenna unit 110a and the inductor unit 110c are disposed on the circuit board 200.
- the component mounting part 110b is formed thicker than the antenna part 110a and the inductor part 110c, and is used as a rigid sub-board.
- the inductor portion 110c has flexibility, and is bent between a portion where the conductor pattern 31 is formed and a portion where the conductor pattern 32 is formed.
- the line-shaped conductor pattern 33 is positioned on the bent valley side (inner side). With such a structure, the line-shaped conductor pattern 33 has a small tensile stress applied to the line-shaped conductor pattern 33 even when the element body 10 is bent, and disconnection of the line-shaped conductor pattern 33 can be suppressed. .
- the inductor element may be partially configured in the element body and arranged along the space in the housing.
- FIG. 10 is an exploded perspective view of the inductor element 104 according to the fourth embodiment.
- the inductor element 104 is obtained by forming conductor patterns 31 to 36 on the element body 10.
- the resin substrate 11 is formed with rectangular spiral (coiled) conductor patterns 31, 32, 34, and 35.
- the coil formed by the conductor patterns 31, 32, 34, and 35 has a coil axis that is perpendicular to the surface of the resin base material 11 (perpendicular to the main surface of the element body 10).
- the resin base material 12 has line-shaped conductor patterns 33 and 36 formed thereon.
- the first end of the conductor pattern 33 is connected to the inner peripheral end of the conductor pattern 31 via a via conductor (interlayer connection conductor), and the second end of the conductor pattern 33 is connected to the inner peripheral end of the conductor pattern 32 via a via conductor.
- the first end of the conductor pattern 36 is connected to the inner peripheral end of the conductor pattern 34 via the via conductor
- the second end of the conductor pattern 36 is connected to the inner peripheral end of the conductor pattern 35 via the via conductor.
- the arrow in FIG. 10 shows an example of the direction of the current flowing through each conductor pattern at a certain moment.
- the magnetic flux passing through the coil opening of the coil by the conductor patterns 31 and 35 is downward, and the magnetic flux passing through the coil opening of the coil by the conductor patterns 32 and 34 is upward.
- magnetic lines of force that circulate adjacent conductor patterns in common are generated. That is, a closed magnetic circuit is partially formed by a set of adjacent coils. For this reason, the magnetic fields generated in the adjacent coils are coupled in a direction in which they strengthen each other.
- the inductor element 104 shown in FIG. 10 When the inductor element 104 shown in FIG. 10 is bent, it may be bent along the line XX or YY in the drawing.
- a plurality of coils may be arranged vertically and horizontally.
- the degree of integration is increased by expanding the conductor patterns constituting the plurality of coils not in one direction but in the plane direction, and can be easily arranged in a small space in the housing or in a gap between the substrate and its adjacent member, for example.
- FIG. 11 is an exploded perspective view of the inductor element 105 according to the fifth embodiment.
- the element body 10 is configured by laminating resin base materials 11 and 12.
- the resin base 11 is formed with rectangular spiral (coiled) conductor patterns 31A and 32A.
- the resin base 12 is formed with rectangular spiral (coiled) conductor patterns 31B and 32B.
- the inner peripheral end of the conductor pattern 31A is connected to the inner peripheral end of the conductor pattern 31B via a via conductor (interlayer connection conductor), and the outer peripheral end of the conductor pattern 31B is connected to the outer peripheral end of the conductor pattern 32B.
- the inner peripheral end of the conductor pattern 32B is connected to the inner peripheral end of the conductor pattern 32A through a via conductor.
- the coil axis of the coil made of the conductor patterns 31A and 31B and the coil made of the conductor patterns 32A and 32B is perpendicular to the surface of the element body 10.
- the arrow in FIG. 11 shows an example of the direction of the current flowing through each conductor pattern at a certain moment.
- the magnetic flux passing through the coil opening of the coil by the conductor patterns 31A and 31B is downward, and the magnetic flux passing through the coil opening of the coil by the conductor patterns 32A and 32B is upward.
- magnetic lines of force that circulate adjacent conductor patterns in common are generated. That is, a closed magnetic circuit is partially formed by a set of adjacent coils. For this reason, the magnetic fields generated in the adjacent coils are coupled in a direction in which they strengthen each other.
- the coil may be formed across a plurality of layers.
- FIG. 12A is an external perspective view of an inductor bridge 120 according to the sixth embodiment, and FIG. 12B is an exploded perspective view thereof.
- the inductor bridge 120 is an element for bridge-connecting the first circuit and the second circuit.
- the inductor bridge 120 includes a flat plate-like element body 10 having flexibility, a first connector 51 and a second connector 52 which are conductive members. Inside the element body 10, an inductor section described later is configured.
- the first connector 51 is provided at the first end of the element body 10 and is connected to the first circuit by mechanical contact.
- the second connector 52 is provided at the second end of the element body 10 and is connected to the second circuit by mechanical contact.
- the element body 10 is formed by laminating resin base materials 11, 12, and 13 of a liquid crystal polymer (LCP).
- Conductive patterns 31 ⁇ / b> A and 32 ⁇ / b> A are formed on the resin base material 11.
- Conductive patterns 31B and 32B are formed on the resin base 12.
- the structure of the conductor pattern of the resin base materials 11 and 12 is the same as that of the inductor element shown in FIG. 11 in the fifth embodiment.
- Connector mounting electrodes 41 and 42 for mounting connectors 51 and 52 are formed on the resin base material 13. These connector mounting electrodes 41 and 42 are connected to the ends of the wiring patterns 37 and 38 through via conductors, respectively.
- Resist layer 61 is formed on the upper surface of resin base material 13, and resist layer 62 is formed on the lower surface of resin base material 12.
- the resist layers 61 and 62 are not essential and are formed as necessary.
- an inductor element with a connector is used as an inductor bridge.
- the conductive member is not limited to the connector, and may be a metal member having a pinning hole in the center.
- FIG. 13 is a perspective view showing an application example of the inductor bridge 120.
- an antenna element pattern 91 is formed on the antenna substrate 301.
- the second connector 52 of the inductor bridge 120 is connected to the feeding point of the antenna element pattern 91 or a portion drawn from the feeding point.
- the antenna substrate 301 is disposed on the circuit substrate 200, and the first connector 51 of the inductor bridge 120 is connected to a connection portion formed on the upper surface of the substrate 201, and an external circuit such as an RFIC disposed on the upper surface of the substrate 201. Is electrically connected.
- FIG. 14 is a diagram illustrating a structure inside the housing of the electronic device 400 according to the seventh embodiment, and is a plan view in a state where the upper housing 191 and the lower housing 192 are separated and the inside is exposed. is there.
- the electronic device 400 is, for example, a mobile phone terminal or a tablet PC, and includes the inductor bridge 120 shown in FIG.
- the printed wiring board 171, 181 and a battery pack 183 are mounted inside the upper casing 191 inside the upper casing 191 inside the upper casing 191 .
- a UHF band antenna 172, a camera module 176, and the like are mounted on the printed wiring board 171.
- the printed wiring board 181 is equipped with a UHF band antenna 182 and the like.
- the printed wiring board 171 and the printed wiring board 181 are connected via a cable 184.
- the printed wiring board 181 and the antenna 182 are connected by an inductor bridge 120.
- the configuration of the inductor bridge 120 is as shown in FIG.
- an inductor bridge may be applied to the cable 184 connecting the printed wiring boards 171 and 181.
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Abstract
Description
図1(A)は第1の実施形態に係るインダクタ素子101の外観斜視図、図1(B)はその分解斜視図である。但し、図1(B)においてはレジスト膜を除いて図示している。図1(C)は第1の実施形態に係るインダクタ素子101の等価回路図である。
k2 =M2/(L1*L2)
で表される。
L < L1+L2+2M
が成り立つ。
図8は第2の実施形態に係るインダクタ素子102の分解斜視図である。このインダクタ素子102は、素体10に端子電極21,22が形成されていて、端子電極21,22を所定の回路に接続して用いるインダクタ素子である。
第3の実施形態では、インダクタ素子を備えた高周波回路モジュールの例を示す。図9は、電子機器の筐体内に配置される、回路基板200および高周波回路モジュール110の斜視図である。
図10は第4の実施形態に係るインダクタ素子104の分解斜視図である。このインダクタ素子104は、素体10に導体パターン31~36が形成されたものである。樹脂基材11には矩形スパイラル状(コイル状)の導体パターン31,32,34,35が形成されている。導体パターン31,32,34,35によるコイルは、樹脂基材11の面に垂直方向(素体10の主面に垂直方向)にコイル軸が向く。
図11は第5の実施形態に係るインダクタ素子105の分解斜視図である。素体10は樹脂基材11,12が積層されて構成される。樹脂基材11には矩形スパイラル状(コイル状)の導体パターン31A,32Aが形成されている。樹脂基材12には矩形スパイラル状(コイル状)の導体パターン31B,32Bが形成されている。導体パターン31Aの内周端はビア導体(層間接続導体)を介して導体パターン31Bの内周端につながり、導体パターン31Bの外周端は導体パターン32Bの外周端につながっている。導体パターン32Bの内周端はビア導体を介して導体パターン32Aの内周端につながっている。
図12(A)は第6の実施形態に係るインダクタブリッジ120の外観斜視図、図12(B)はその分解斜視図である。このインダクタブリッジ120は第1回路と第2回路との間をブリッジ接続するための素子である。図12(A)に表れているように、このインダクタブリッジ120は、可撓性を有する平板状の素体10、導通部材である第1コネクタ51および第2コネクタ52を備えている。素体10の内部には、後に述べるインダクタ部が構成されている。第1コネクタ51は、素体10の第1端部に設けられ、第1回路に機械的接触により接続される。第2コネクタ52は、素体10の第2端部に設けられ、第2回路に機械的接触により接続される。
図14は第7の実施形態に係る電子機器400の筐体内部の構造を示す図であり、上部筐体191と下部筐体192とを分離して内部を露出させた状態での平面図である。この電子機器400は例えば携帯電話端末やタブレットPCであり、図12に示したインダクタブリッジ120を備えたものである。
P1,P2…ポート
10…素体
11,12,13…樹脂基材
21,22…端子電極
31~36…導体パターン
31A,32A,31B,32B…導体パターン
37,38…配線パターン
41,42…コネクタ実装電極
51…第1コネクタ
52…第2コネクタ
61,62…レジスト層
91…アンテナ素子パターン
101,102,104,105…インダクタ素子
110…高周波回路モジュール
110a…アンテナ部
110b…部品実装部
110c…インダクタ部
120…インダクタブリッジ
171,181…プリント配線板
172…UHF帯アンテナ
176…カメラモジュール
181…プリント配線板
182…UHF帯アンテナ
183…バッテリーパック
184…ケーブル
191…上部筐体
192…下部筐体
200…回路基板
201…基板
301…アンテナ基板
400…電子機器
Claims (5)
- 絶縁性基材と、この絶縁性基材に形成された導体パターンによるコイルとを含み、
前記コイルは同一平面上に並置され、直列接続された複数のコイルで構成され、
同一平面上に隣接するコイルで閉磁路を形成するように、各コイルの巻回方向および接続関係が定められており、
面方向に隣接するコイルとコイルとの間で劣角が180°から90°までの範囲内の角度で前記絶縁性基材が屈曲されていることを特徴とするインダクタ素子。 - 前記コイルは複数の層に亘って形成されている、請求項1に記載のインダクタ素子。
- 前記複数のコイルのうちのコイルとコイルとを接続するための線分状の導体パターンを含み、該線分状の導体パターンは、当該線分状の導体パターンで接続されるコイルが形成された層とは異なる層に形成されており、前記線分状の導体パターンで接続されるコイルが形成された層よりも前記線分状の導体パターンが内周側になるように、前記絶縁性基材が屈曲された、請求項1または2に記載のインダクタ素子。
- 請求項1~3のいずれかに記載のインダクタ素子を備え、前記絶縁性基材に前記インダクタ素子に導通する導通部材を備えたインダクタブリッジ。
- 請求項1~3のいずれかに記載のインダクタ素子を備え、前記複数のコイルによるインダクタンスおよび浮遊容量で定まる自己共振周波数を阻止帯域に含む高周波フィルタ。
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JP2014557266A JP5720863B2 (ja) | 2013-04-16 | 2014-03-24 | インダクタ素子、インダクタブリッジおよび高周波フィルタ |
US14/841,792 US10157703B2 (en) | 2013-04-16 | 2015-09-01 | Inductor element, inductor bridge, high-frequency filter, high-frequency circuit module, and electronic component |
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WO2018147397A1 (ja) * | 2017-02-10 | 2018-08-16 | パナソニックIpマネジメント株式会社 | 多層基板のフィルタ |
WO2019131581A1 (ja) * | 2017-12-26 | 2019-07-04 | 株式会社村田製作所 | インダクタブリッジおよび電子機器 |
WO2023127245A1 (ja) * | 2021-12-28 | 2023-07-06 | 株式会社村田製作所 | フィルタ装置およびそれを搭載した高周波フロントエンド回路 |
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