WO2009128310A1 - Substrat fonctionnel - Google Patents

Substrat fonctionnel Download PDF

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Publication number
WO2009128310A1
WO2009128310A1 PCT/JP2009/054862 JP2009054862W WO2009128310A1 WO 2009128310 A1 WO2009128310 A1 WO 2009128310A1 JP 2009054862 W JP2009054862 W JP 2009054862W WO 2009128310 A1 WO2009128310 A1 WO 2009128310A1
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Prior art keywords
electrode
resonator
resonators
electrodes
internal
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PCT/JP2009/054862
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English (en)
Japanese (ja)
Inventor
淳 東條
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株式会社村田製作所
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Priority to JP2010508151A priority Critical patent/JP5218551B2/ja
Publication of WO2009128310A1 publication Critical patent/WO2009128310A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/203—Strip line filters
    • H01P1/20327—Electromagnetic interstage coupling
    • H01P1/20336—Comb or interdigital filters
    • H01P1/20345—Multilayer filters

Definitions

  • the present invention relates to a functional circuit board having functions such as a filter and a duplexer, and more particularly to a board using a material that exhibits a negative magnetic permeability.
  • a filter such as a SAW (Surface Acoustic Wave) filter or a dielectric filter, a coil, a capacitor, etc. It is common to mount a combination of a plurality of electronic components having specific functions.
  • SAW Surface Acoustic Wave
  • the present invention has been made to solve such a problem, and an object thereof is to provide a functional substrate capable of miniaturizing a circuit for realizing a function such as a filter.
  • a functional substrate that prevents a current including a predetermined frequency component from being transmitted in a predetermined direction, and receives a plurality of electromagnetic waves generated when the current flows.
  • a resonator is provided, and the sensitivity of the resonator to electromagnetic waves is directional, and the plurality of resonators are arranged in a direction that prevents current from being transmitted in a predetermined direction.
  • a functional board that prevents a current including a predetermined frequency component from passing in a predetermined direction.
  • the resonator includes a first resonator group including a plurality of resonators arranged in a first direction, and a plurality of resonators arranged in a second direction orthogonal to the first direction. And a second resonator group including resonators.
  • a functional substrate that prevents a current including a predetermined frequency component from being transmitted in a predetermined direction, and generates a resonance by receiving an electromagnetic wave generated when the current flows.
  • the plurality of resonators are arranged in a first direction, and each of the plurality of resonators is composed of a plurality of resonators each having a first resonance frequency, and is orthogonal to the first direction.
  • a second resonator group including a plurality of resonators arranged in the second direction and each having a second resonance frequency different from the first resonance frequency.
  • the functional substrate includes a plurality of substrate layers each including a plurality of resonators.
  • each resonator includes a plurality of electrode pairs each including a first electrode and a second electrode facing each other via an insulator, a third electrode electrically connected to each of the first electrodes, 4th electrode electrically connected with each of 2 electrodes, and each electrode surface of the 1st and 2nd electrode can be arranged to be substantially parallel to the magnetic field lines generated when a current flows
  • the electrode surfaces of the third and fourth electrodes are configured to be substantially parallel to the magnetic field lines on a surface different from the electrode surfaces of the first and second electrodes.
  • each resonator includes an external electrode pair composed of two external electrodes formed to face each other in parallel, a plurality of first internal electrodes electrically connected to one of the external electrode pairs, and an external electrode pair
  • Each electrode surface of the internal electrode group is formed perpendicular to the electrode surface of the external electrode, and is connected to the external electrode pair.
  • Each of the electrode surfaces is formed in parallel with a plane perpendicular to the current propagation direction, and is formed between one first internal electrode and a second internal electrode adjacent to the first internal electrode.
  • an electrical circulation path including a second capacitance formed between another first internal electrode and another second internal electrode adjacent to the first internal electrode, and an external electrode pair. Is done.
  • each resonator includes a plurality of plate electrodes arranged in parallel with each other through an insulator, a first connection electrode electrically connected to an even-numbered plate electrode of the plurality of plate electrodes, and a plurality of plate electrodes
  • a second connection electrode electrically connected to the odd-numbered plate electrode of the plate electrode, each electrode surface of the first and second connection electrodes is formed perpendicular to the electrode surface of the plurality of plate electrodes
  • the electrode surfaces of the plurality of flat plate electrodes are configured to be arranged substantially parallel to the magnetic field lines generated when a current flows.
  • each resonator includes first and second comb electrodes each having a plurality of electrode surfaces parallel to each other, the uppermost electrode surface of the first comb electrode and the uppermost layer of the second comb electrode. And the lowermost electrode surface of the first comb electrode and the lowermost electrode surface of the second comb electrode are parallel to each other with a predetermined interval.
  • the electrode surfaces of the first and second comb electrodes are formed so as to be opposed to each other, and can be arranged to be substantially parallel to the magnetic field lines generated when a current flows.
  • each resonator is a multilayer capacitor.
  • the substrate since the resonator is arranged in the substrate, the substrate has a function such as a filter. Therefore, a circuit that realizes a function such as a filter can be downsized.
  • 1 is a schematic external view of a resonator according to an embodiment of the present invention. It is the II-II sectional view taken on the line shown in FIG. It is a figure for demonstrating the resonant circuit formed with a resonator in a resonant frequency. It is a figure which shows an example of the frequency characteristic of the relative magnetic permeability produced with the resonator according to embodiment of this invention. It is a figure which shows the result of having simulated the frequency characteristic of the relative magnetic permeability produced with the resonator according to embodiment of this invention according to the orientation of a multilayer capacitor.
  • 1 is a schematic external view of a resonance device according to an embodiment of the present invention.
  • the resonance apparatus it is a diagram showing an example of the frequency characteristic of the attenuation amount of the current flowing through the conductor.
  • It is a general
  • FIG. 4 is a four-quadrant diagram showing characteristics appearing with respect to an incident wave to a medium for each sign of magnetic permeability ⁇ and dielectric constant ⁇ .
  • the present invention uses a metamaterial for a substrate.
  • This metamaterial is an artificial material having electromagnetic or optical characteristics that a substance existing in nature does not have.
  • Typical properties of such metamaterials include negative permeability ( ⁇ ⁇ 0), negative dielectric constant ( ⁇ ⁇ 0), or negative refractive index (when both permeability and dielectric constant are negative) Is mentioned.
  • the region of ⁇ ⁇ 0 and ⁇ > 0, or the region of ⁇ > 0 and ⁇ ⁇ 0 is also referred to as “evanescent solution region”, and the region of ⁇ ⁇ 0 and ⁇ ⁇ 0 is also referred to as “left-handed region”.
  • FIG. 15 is a four-quadrant diagram showing the characteristics that appear with respect to the incident wave to the medium for each sign of magnetic permeability ⁇ and dielectric constant ⁇ .
  • Most of the substances existing in the natural world correspond to the right-handed medium located in the first quadrant shown in FIG. 15, and the wave incident on the medium is refracted by the refractive index determined by the magnetic permeability and the dielectric constant, Propagate in the incident direction.
  • the incident wave cannot propagate in the second quadrant and the fourth quadrant (evanescent solution region) shown in FIG.
  • the third region left-handed region shown in FIG. 15 since the refractive index is negative, the wave incident on the medium propagates in the direction opposite to the incident direction.
  • Reference 1 (“Left-handed metamaterial", Nikkei Electronics January 2 issue, Nikkei BP, January 2, 2006, p. 75-81) includes a microwave.
  • a split ring resonator (SRR) is disclosed.
  • SRR split ring resonator
  • unit cells composed of two large and small ring patterns in which a part of the circumference is cut out are periodically arranged.
  • resonance (resonance) occurs in a specific frequency region, and ⁇ ⁇ 0 is expressed.
  • ⁇ ⁇ 0 By arranging the split ring resonator and the metal rod ( ⁇ ⁇ 0) close to each other, ⁇ ⁇ 0 and ⁇ ⁇ 0 are realized, and a left-handed medium is obtained.
  • a substrate embedded with such a metamaterial has a filter function for a signal having a frequency near the resonance frequency transmitted on the substrate. This is because at the resonance frequency, the magnetic permeability greatly changes across the zero point, so that the impedance changes and reflection due to impedance mismatching occurs.
  • a resonator including a plurality of electrodes is used as a metamaterial.
  • a resonance circuit mainly composed of electrostatic capacitance (capacitance) generated between the electrodes is formed.
  • This resonance circuit is sensitive to a specific frequency component of an electromagnetic wave generated by an alternating current flowing through the conductor, and can generate an electrical resonance phenomenon by receiving the electromagnetic wave of this frequency component. Due to this resonance phenomenon, the magnetic permeability largely fluctuates, and the current flowing through the conductor can be reflected or suppressed.
  • the length of each resonator in the propagation direction of the current is at least ⁇ with respect to the wavelength ⁇ of the electromagnetic wave at the frequency to be targeted. Must be shorter than / 4. Furthermore, the length of each resonator in the current propagation direction is preferably ⁇ / 20 or less.
  • a multilayer capacitor formed by laminating a plurality of plate electrodes with an insulator (dielectric) can be used.
  • achieves a resonator using a multilayer capacitor is illustrated.
  • the resonator can be easily configured using a multilayer capacitor such as a commercially available multilayer ceramic capacitor.
  • FIG. 1 is a schematic external view of resonator built-in substrate 110 according to an embodiment of the present invention.
  • resonator built-in substrate 110 includes a resonator 100 and an exterior portion 12 that is a nonmagnetic material that covers the periphery of resonator 100.
  • a resin material such as Teflon (registered trademark) is suitable.
  • the resonator 100 is disposed in the vicinity of a strip-like conductor 14 (hereinafter also simply referred to as “conductor 14”) through which a current including a predetermined frequency component flows, so that a specific frequency of an electromagnetic wave generated by the current is generated. Resonance is generated in response to the component (resonance frequency).
  • a ground electrode 16 (not shown) is disposed on the surface of the resonator 100 opposite to the surface in contact with the conductor 14.
  • Resonance in the resonator 100 generates a magnetic flux from the inside of the resonator 100 to the outside, and an electric field induced by the generated magnetic flux prevents an electromagnetic wave generated by the current.
  • the conductor 14 the flow of the alternating current of the resonance frequency component in the resonator 100 is hindered, and the resonator-embedded substrate 110 functions as a kind of band cutoff filter.
  • the resonator 100 is a passive device that does not require electrical energy from an external power source or the like and that resonates only with an electromagnetic wave (particularly magnetic flux) radiated from the conductor 14. And the resonator 100 expresses a negative magnetic permeability by producing such a resonance.
  • the length l in the current propagation direction of the conductor 14 of the resonator 100 is the wavelength of the electromagnetic wave at the resonance frequency. For ⁇ , it must be at least shorter than ⁇ / 4. Furthermore, the length l of the resonator 100 is preferably ⁇ / 20 or less.
  • the distance h between the conductor 14 and the multilayer capacitor 10 is 0.2 mm, and the distance between the multilayer capacitor and the ground h ′ is 0.2 mm.
  • FIGS. 2 is a cross-sectional view taken along line II-II shown in FIG.
  • multilayer capacitor 10 includes a plurality of first internal electrodes 4 and a plurality of second internal electrodes 5 that are opposed to each other with spacers 6 each being an insulator having a high relative dielectric constant.
  • the plurality of first internal electrodes 4 are electrically connected to the first external electrode 2, and the plurality of second internal electrodes 5 are electrically connected to the second external electrode 3.
  • a plurality of plate-like internal electrodes 4 and 5 are laminated, and the area of the electrode, the electrode between the adjacent first internal electrode 4 and the second internal electrode 5 are stacked.
  • An electrostatic capacitance (capacitance) whose value is determined by the distance between them and the relative dielectric constant of the spacer 6 is generated.
  • the electrode surfaces of the first internal electrode 4 and the second internal electrode 5 constituting the multilayer capacitor 10 are arranged so as to be substantially parallel to the magnetic field lines of the magnetic field.
  • the electrode surfaces of the first external electrode 2 and the second external electrode 3 are substantially different from the magnetic field lines on the surfaces different from the electrode surfaces of the first external electrode 2 and the second external electrode 3. It arrange
  • a resonance circuit as shown in FIG. 3 is formed for a predetermined frequency component, and this resonance circuit causes a negative permeability.
  • FIG. 3 is a diagram for explaining a resonance circuit formed by the resonator 100 at the resonance frequency.
  • the electrode 3 acts as a coil (inductor) according to the path length.
  • the uppermost electrode 4 a, the first external electrode 2, and the lowermost electrode 4 b of the first internal electrodes are electrically connected to each other and include these.
  • a current path is formed.
  • the uppermost electrode 5a, the second outer electrode 3, and the lowermost electrode 5b of the second internal electrodes are electrically connected to each other, and a current path including these is connected. It is formed.
  • both current paths are electrically connected to each other via the electrostatic capacitance (capacitance C1) between the electrode 4a and the electrode 5a and the electrostatic capacitance (capacitance C2) between the electrode 4b and the electrode 5b.
  • a resonant circuit is formed which is connected and includes capacitances C1 and C2 and inductances L1 to L6 generated by the respective electrodes. Therefore, the resonator 100 according to the present embodiment has a resonance frequency determined by the capacitance (C1 + C2) and the inductance (L1 + L2 + L3 + L4 + L5 + L6), and permeability resonance occurs when an electromagnetic wave having this resonance frequency is incident.
  • FIG. 4 is a diagram showing an example of frequency characteristics of relative permeability generated in the resonator-embedded substrate 110 according to the present embodiment.
  • the change characteristics shown in FIG. 4 are calculated by simulation.
  • the relative magnetic permeability represents a ratio of magnetic permeability to vacuum magnetic permeability.
  • resonator built-in substrate 110 has about 4.9 GHz as one resonance frequency, and the relative permeability greatly fluctuates before and after that.
  • the impedance also fluctuates greatly and mismatch occurs, and functions as a band cutoff filter for the current flowing through the conductor 14 in this frequency region.
  • the electrode surfaces of the first internal electrode 4 and the second internal electrode 5, and the first external electrode 2 and the second external electrode 3 are arranged so as to be substantially parallel to the magnetic field lines of the magnetic field.
  • negative permeability which is a function as a metamaterial
  • substantially parallel means to exclude the state in which each electrode surface is orthogonal to the magnetic field lines of magnetic force, and in addition to the state in which each electrode surface is completely parallel to the magnetic field lines of magnetic field, Including a state having a predetermined angle.
  • the magnitude of the negative magnetic permeability developed in the resonator 100 is a value that can satisfy the requirements of the application, etc., it can be regarded as “substantially parallel”.
  • FIG. 5 is a diagram showing a result of simulating the frequency characteristics of the relative permeability generated in the resonator 100 according to the present embodiment for each orientation of the multilayer capacitor 10.
  • arrangement (a) and arrangement (b) are as follows: the first internal electrode 4 and the second internal electrode 5, and the electrode surfaces of the first external electrode 2 and the second external electrode 3 are magnetic field lines. The case where it arrange
  • the arrangement (c) shows a case where the electrode surfaces of the first internal electrode 4 and the second internal electrode 5 are arranged at an angle of 45 ° with respect to the magnetic field lines.
  • Arrangement (d) shows a case where the electrode surfaces of the first external electrode 2 and the second external electrode 3 are arranged so as to be orthogonal to the magnetic field lines of the magnetic field, and arrangement (e) shows the first internal electrode 4. And the case where each electrode surface of the 2nd internal electrode 5 is arrange
  • any one of the first internal electrode 4 and the second internal electrode 5, and the first external electrode 2 and the second external electrode 3 is disposed orthogonal to the magnetic field lines of the magnetic field.
  • the negative magnetic permeability does not appear.
  • the configuration of resonator 100 according to the present embodiment can also be expressed as follows.
  • the resonator 100 is electrically connected to an external electrode pair including a first external electrode 2 and a second external electrode 3 that are formed to face each other in parallel and the first external electrode 2 that is one of the external electrode pairs.
  • a plurality of first internal electrodes 4 and a plurality of second internal electrodes 5 electrically connected to the second external electrode 3 which is the other of the pair of external electrodes.
  • Each electrode surface of the internal electrode group including the first internal electrode 4 and the second internal electrode 5 is formed to be perpendicular to the electrode surfaces of the first external electrode 2 and the second external electrode 3. .
  • each electrode surface of the first external electrode 2 and the second external electrode 3 is formed so as to coincide with a vertical surface with respect to the propagation direction of the current flowing through the conductor 14.
  • the capacitance (capacitance C2) formed between the lowermost electrode 4b among the electrodes and the lowermost electrode 5b among the second internal electrodes adjacent to the electrode 4b, the first external electrode 2 and the second An electrical circulation path including the external electrode 3 is formed.
  • the resonator 100 includes a first internal electrode 4 and a second internal electrode 5 which are a plurality of plate electrodes arranged in parallel to each other via a spacer 6 which is an insulator, and even-numbered first electrodes of the plurality of plate electrodes.
  • 1 is a first external electrode 2 that is a first connection electrode electrically connected to the internal electrode 4, and a second connection electrode that is electrically connected to odd-numbered second internal electrodes 5 of a plurality of plate electrodes.
  • the electrode surfaces of the first external electrode 2 and the second external electrode 3 are formed perpendicular to the electrode surfaces of the plurality of plate electrodes. Further, the electrode surfaces of the plurality of flat plate electrodes are arranged so as to be substantially parallel to the magnetic field lines generated when a current flows through the conductor 14.
  • the resonator 100 includes a first comb electrode composed of a plurality of first internal electrodes 4 and a first external electrode 2 parallel to each other, a plurality of second internal electrodes 5 and a second external electrode 3 parallel to each other. And a second comb-type electrode.
  • the electrode surface of the uppermost layer electrode 4a of the first comb-shaped electrode and the electrode surface of the uppermost layer electrode 5a of the second comb-shaped electrode are formed so as to face each other in parallel at a predetermined interval. Thereby, an electrostatic capacitance (capacitance C1) is formed between the two.
  • the electrode surface of the lowermost electrode 4b of the first comb-shaped electrode and the electrode surface of the lowermost electrode 5b of the second comb-shaped electrode are formed so as to face each other in parallel with a predetermined interval. Thereby, electrostatic capacitance (capacitance C2) is formed between both.
  • the electrode surfaces of the first comb-type electrode and the second comb-type electrode are arranged so as to be substantially parallel to the lines of magnetic force generated when a current flows through the conductor 14.
  • the resonance circuit mainly composed of the capacitance (capacitance) generated between the stacked electrodes since the resonance circuit mainly composed of the capacitance (capacitance) generated between the stacked electrodes is used, the capacitance included in the resonance circuit can be made relatively large. Therefore, the device size for obtaining the necessary resonance characteristics can be reduced as compared with the configuration in which the ring pattern is periodically arranged as in the split ring resonator. As a result, a negative dielectric constant can be realized with a smaller device.
  • FIG. 6 is a schematic external view of a resonance device 200 including a plurality of resonators 100.
  • a resonance apparatus 200 is configured by periodically arranging a plurality of the resonators 100 described above (five in FIG. 6) along the conductor 14.
  • the electrode surfaces of the first internal electrode 4 (FIG. 2) and the second internal electrode 5 (FIG. 2) constituting each resonator 100 are substantially parallel to the magnetic field lines of the magnetic field. Placed in.
  • the electrode surfaces of the first external electrode 2 (FIG. 2) and the second external electrode 3 (FIG. 2) are also arranged so as to be substantially parallel to the magnetic field lines of the magnetic field.
  • each resonator 100 Since the configuration of each resonator 100 is the same as the configuration described above, detailed description will not be repeated.
  • FIG. 7 is a diagram showing an example of frequency characteristics of the attenuation amount of the current flowing through the conductor 14 in the resonance device 200 shown in FIG. Note that the change characteristics shown in FIG. 7 are calculated by simulation.
  • resonant apparatus 200 has a resonance point in the vicinity of 6.5 GHz to 7.0 GHz, and the passing wave is greatly attenuated in this frequency region.
  • the characteristics (typically necessary attenuation) of the substrate can be changed depending on the number of resonators arranged on the substrate. Therefore, it is possible to easily configure a substrate that realizes an optimal negative dielectric constant according to the application to which it is applied.
  • the configuration of the multilayer capacitor having the same width at the connection surface between the internal electrode and the external electrode is illustrated.
  • the width of the external electrode may be reduced. Good.
  • FIG. 8 is a schematic external view of the multilayer capacitor 20 used in the resonator according to the modification.
  • multilayer capacitor 20 includes a plurality of first internal electrodes 4 and a plurality of second internal electrodes 5 that are alternately arranged to face each other via spacers, and each of first internal electrodes 4.
  • a first external electrode 2 # that is electrically connected and a second external electrode 3 # that is electrically connected to each of the second internal electrodes 5 are included.
  • the width of the first external electrode 2 # is narrower than the width of the first internal electrode 4, and the second internal electrode 5 and the first external electrode 2 #
  • the width of the second external electrode 3 # is narrower than the width of the second internal electrode 5 at the connection surface with the 2 external electrode 3 #.
  • the inductance generated in the first external electrode 2 # and the second external electrode 3 # can be increased by narrowing the line width of the first external electrode 2 # and the second external electrode 3 #. Therefore, in the resonance circuit as shown in FIG. 3, since the capacitance (C1 + C2) necessary for generating the same resonance frequency is small, the internal electrode can be made smaller, and as a result, the entire multilayer capacitor can be reduced in size. Can be
  • the functional substrate according to the present invention is such that the above-described resonator is disposed on the substrate or is formed in the substrate. Depending on how the resonators are arranged, the substrate can have various types of functions.
  • FIG. 9A and 9B are diagrams illustrating a first arrangement example of the resonators.
  • FIG. 9A is a top view of the arranged resonators.
  • FIG. 9B is a horizontal sectional view of the resonator 100.
  • all the resonators 100 are arranged in the same direction. That is, all the resonators 100 are arranged so that the longitudinal directions of the first internal electrode 4 and the second internal electrode 5 are in the same direction (the vertical direction in FIG. 9A).
  • the resonance frequency of the resonator 100 is 3 GHz.
  • the substrate on which the resonator is arranged in this way passes all the current flowing in the left-right direction in FIG. 9A.
  • the 3 GHz component of the current flowing in the vertical direction in FIG. 9A is not passed. That is, this substrate functions as a directional filter. Since each resonator uses a multilayer capacitor that has directionality to current, directionality also appears in the filter function of the substrate.
  • the substrate having the first arrangement example has a directional filter function. However, depending on the application, there is a case where it is not desired to give directionality to the filter function of the substrate.
  • Such a substrate can be realized by the arrangement of the resonators.
  • FIG. 10 is a diagram illustrating a second arrangement example of the resonators.
  • half of the resonators 100 are arranged such that the longitudinal directions of the first internal electrode 4 and the second internal electrode 5 are in the left-right direction in FIG.
  • the remaining half of the resonators 100 are arranged such that the longitudinal directions of the first internal electrode 4 and the second internal electrode 5 are in the vertical direction of FIG.
  • the resonance frequency of the resonator 100 is 3 GHz.
  • the substrate on which the resonator is arranged as shown in FIG. 10 does not pass the 3 GHz component with respect to the current flowing in either the horizontal direction or the vertical direction in FIG.
  • the resonators are divided into two groups having different directions of the resonators included by 90 degrees, and both groups are mixed and arranged at an appropriate interval, thereby eliminating the directionality of the filter characteristics of the substrate. Can do.
  • complex filter characteristics can be realized by using a plurality of types of resonators each having a different resonance frequency.
  • FIG. 11 is a diagram illustrating a third arrangement example of the resonators.
  • the resonators 100 and the resonators 100 # having frequency characteristics different from those of the resonators 100 are alternately arranged.
  • the resonator 100 is arranged such that the longitudinal directions of the first internal electrode 4 and the second internal electrode 5 are in the vertical direction of FIG.
  • Resonator 100 # is arranged such that the longitudinal directions of first internal electrode 4 and second internal electrode 5 are in the horizontal direction of FIG.
  • the resonance frequencies of the resonator 100 and the resonator 100 # are 3 GHz and 5 GHz, respectively.
  • the substrate on which the resonator is arranged does not pass the 3 GHz component of the current in the left-right direction. Further, the 5 GHz component of the current in the vertical direction is not passed.
  • the substrate can be provided with a filter for removing a specific frequency component of the current. Since the substrate itself has a filter function, it is not necessary to mount a filter on the substrate, and the entire circuit can be downsized.
  • multilayer capacitors such as multilayer ceramic capacitors are generally less expensive than filters. Even if the multilayer capacitor is disposed on the entire substrate, the entire circuit may be cheaper than the conventional configuration.
  • Multilayer capacitors can be selected from a huge variety of commonly distributed types, so if you use the board according to this embodiment, you do not need to make custom products that match the characteristics of each model. The period can be shortened and the cost can be reduced.
  • the arrangement of the resonators can be devised to give the substrate a function as a duplexer.
  • FIG. 12 is a diagram illustrating a fourth arrangement example of the resonators.
  • Resonator 100 is arranged in the left half of FIG. 12, and resonator 100 # is arranged in the right half.
  • the resonator 100 and the resonator 100 # are both arranged such that the longitudinal directions of the first internal electrode 4 and the second internal electrode 5 are in the left-right direction in FIG.
  • a signal line branched into two branch lines passes.
  • the main line of the signal line passes on the boundary between the area where the resonator 100 is disposed and the area where the resonator 100 # is disposed. Therefore, the signal flowing through this signal line does not resonate with the resonator.
  • Each of the two branch lines is along the horizontal direction of FIG. 12, that is, the direction parallel to the longitudinal direction of the internal electrode.
  • the resonance frequency of the resonator 100 is 3 GHz and the resonance frequency of the resonator 100 # is 5 GHz.
  • the resonance frequency of the resonator 100 # is 5 GHz.
  • FIG. 13 shows another arrangement example of the substrate functioning as a duplexer.
  • FIG. 13 is a diagram illustrating a fifth arrangement example of the resonators.
  • the resonator 100 is arranged in the upper half of FIG. 13, and the resonator 100 # is arranged in the lower half.
  • the resonator 100 and the resonator 100 # are both arranged such that the longitudinal directions of the first internal electrode 4 and the second internal electrode 5 are the left-right direction in FIG.
  • a signal line having two branch lines passes through the substrate shown in FIG.
  • the main lines of the signal lines are arranged along the vertical direction in FIG. 13, that is, the direction in which resonance does not occur.
  • One branch line (referred to as a first branch line) passes over an area where the resonator 100 is disposed.
  • the direction of the first branch line is the left-right direction of FIG.
  • Another branch line (referred to as a second branch line) passes over the area where resonator 100 # is disposed.
  • the direction of the second branch line is the left-right direction of FIG.
  • the resonance frequency of the resonator 100 is 3 GHz and the resonance frequency of the resonator 100 # is 5 GHz.
  • this board also functions as a duplexer, like the board shown in FIG.
  • FIGS. 14A and 14B are perspective views of the substrate.
  • FIG. 14A is a perspective view of a substrate 310 in which the resonator 100 is periodically and two-dimensionally incorporated.
  • the arrangement of the resonator 100 shows the same arrangement method as in FIG. A conductor 14 is disposed on the layer where the resonator 100 is disposed.
  • Half of the resonators 100 are arranged such that the longitudinal directions of the first internal electrode 4 and the second internal electrode 5 are in the x direction of FIG. 14A.
  • the remaining half of the resonators 100 are arranged such that the longitudinal directions of the first internal electrode 4 and the second internal electrode 5 are in the y direction of FIG. 14A.
  • FIG. 14B shows a perspective view of a substrate 410 in which the resonator 100 is periodically and three-dimensionally incorporated.
  • the resonators in any layer show the same arrangement method as in FIG.
  • the arrangement of the resonators may be changed depending on the layer. For example, by making the arrangement of the resonators near the front surface of the substrate different from the arrangement of the resonators near the back surface, the filter characteristics on the front surface and the filter characteristics on the back surface are different (for example, the resonance frequency is different, The substrate can be manufactured (for example, the directionality of the filter is different).
  • the resonator 100 is intentionally drawn so that it can be easily understood. Actually, a substrate material such as a resin exists between the resonators 100. The internal electrodes of the resonator 100 are also drawn so as to be intentionally visible.
  • the configuration in which the resonator using the multilayer capacitor is used as the metamaterial has been described.
  • the configuration of the metamaterial is not limited to this.
  • a split ring resonator as disclosed in Document 1 may be used as a metamaterial.
  • Two-dimensional split ring resonators generally have a direction for current sensitivity that does not cause resonance if the magnetic field lines come from the plane containing the resonator. Therefore, if the configuration described above is used, a substrate circuit having a filter function and a duplexer function can be realized using a split ring resonator.

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  • Electromagnetism (AREA)
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Abstract

La présente invention concerne une pluralité de résonateurs (100) qui sont agencés sur un substrat. Chacun des résonateurs (100) résonne lors de la réception d’une onde électromagnétique générée lorsqu’un courant prédéterminé circule autour du résonateur. En outre, chacun des résonateurs (100) présente une direction différente de sensibilité au courant. Chacun des résonateurs (100) est agencé dans la direction pour entraîner une résonance pour une onde électromagnétique entraînée par un courant qui passe sur le substrat.
PCT/JP2009/054862 2008-04-18 2009-03-13 Substrat fonctionnel WO2009128310A1 (fr)

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JP2010508151A JP5218551B2 (ja) 2008-04-18 2009-03-13 機能基板

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JP2008109368 2008-04-18
JP2008-109368 2008-04-18

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WO2009128310A1 true WO2009128310A1 (fr) 2009-10-22

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Cited By (2)

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