WO2018092453A1 - FILTRE COMPOSITE DIÉLECTRIQUE, MODULE HAUTE FRÉQUENCE, CIRCUIT FRONTAL HAUTE FRÉQUENCE, DISPOSITIF DE COMMUNICATION ET SYSTÈME MIMO Massif - Google Patents

FILTRE COMPOSITE DIÉLECTRIQUE, MODULE HAUTE FRÉQUENCE, CIRCUIT FRONTAL HAUTE FRÉQUENCE, DISPOSITIF DE COMMUNICATION ET SYSTÈME MIMO Massif Download PDF

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Publication number
WO2018092453A1
WO2018092453A1 PCT/JP2017/036181 JP2017036181W WO2018092453A1 WO 2018092453 A1 WO2018092453 A1 WO 2018092453A1 JP 2017036181 W JP2017036181 W JP 2017036181W WO 2018092453 A1 WO2018092453 A1 WO 2018092453A1
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Prior art keywords
filter
dielectric
dielectric composite
composite filter
circuit
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PCT/JP2017/036181
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English (en)
Japanese (ja)
Inventor
克人 黒田
尾仲　健吾
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株式会社村田製作所
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Publication of WO2018092453A1 publication Critical patent/WO2018092453A1/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
    • H01P1/207—Hollow waveguide filters
    • H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
    • 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
    • H01P1/212—Frequency-selective devices, e.g. filters suppressing or attenuating harmonic frequencies
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/12—Hollow waveguides

Definitions

  • the present invention relates to a dielectric composite filter, a high frequency module, a high frequency front end circuit, a communication device, and a Massive MIMO system.
  • a dielectric waveguide filter provides a pass characteristic with extremely steep attenuation at the end of the pass band.
  • TE102 and TE201 since there are a plurality of higher order modes such as TE102 and TE201, suppression of spurious away from the passband is possible. It may not always be enough.
  • Spurious can be easily suppressed, for example, by adding a separate filter element.
  • the wiring conductor which is a wiring connecting the dielectric resonator and the separate filter element, is exposed to the space, the dielectric loss occurs due to radiation loss from the wiring conductor. There is a concern that the insertion loss of the body waveguide filter increases.
  • the present invention provides a dielectric composite filter with low insertion loss while suppressing spurious, a high-frequency module, a high-frequency front-end circuit, a communication device, and a Massive MIMO system using the dielectric composite filter.
  • a dielectric composite filter is formed by connecting a plurality of dielectric resonators, and converts a signal propagation mode into at least one dielectric resonator.
  • a waveguide filter provided with an input / output unit, a dielectric block connected to the dielectric resonator at one end, and a wiring formed on the surface of the dielectric block and extending from the input / output unit
  • a transmission line filter having a conductor.
  • the frequency characteristic of the waveguide filter can be supplemented by the transmission line filter.
  • the transmission line filter is connected to a dielectric resonator at one end where an input / output unit of the waveguide filter is provided, and is connected to the input / output unit by a wiring conductor formed on the surface of the dielectric block. Therefore, for example, compared to a case where a transmission line filter and a waveguide filter provided separately are connected by wiring, the wiring conductor can be significantly shortened, and radiation loss from the wiring conductor can be kept small. As a result, a dielectric composite filter having excellent frequency characteristics and low insertion loss can be obtained.
  • the transmission line filter may be a low pass filter.
  • the wiring conductor may have at least two or more portions having different widths that are dimensions in a direction orthogonal to the signal propagation direction in the wiring conductor.
  • the insufficient suppression of spurious due to the waveguide filter can be compensated by the transmission line filter which is a low-pass filter.
  • the transmission line filter may be a band elimination filter or a notch filter.
  • the wiring conductor may include a main conductor provided in a signal propagation direction and a plurality of open stubs branched from the main conductor.
  • a transmission line filter that is a band elimination filter or a notch filter.
  • the plurality of open stubs may include a first open stub extending to one side of the main conductor and a second open stub extending to the other side of the main conductor.
  • a conductor film may be formed on the surface of the transmission line filter opposite to the surface on which the wiring conductor is formed.
  • the wiring conductor of the transmission line filter is shielded by the conductor film, the radiation loss from the wiring conductor can be further reduced. As a result, the insertion loss of the dielectric composite filter is further reduced.
  • a conductor film is formed on the surface of the waveguide filter, and the conductor film formed on the opposite surface of the transmission line filter is a conductor film formed on the surface of the waveguide filter. There may be.
  • the wiring conductor and the input / output unit may be formed on the same surface of the dielectric composite filter.
  • the dielectric composite filter can be surface-mounted with the surface on which the wiring conductor and the input / output section are formed as the mounting surface, so the structure of the dielectric composite filter is simplified and the size is reduced. Is possible.
  • the input / output unit may be provided at a corner of the dielectric resonator at the one end.
  • the radiation loss from the wiring conductor is further suppressed, and the insertion loss of the dielectric composite filter is further reduced.
  • the dielectric composite filter may further include a dielectric resonator connected to a dielectric resonator at the other end of the waveguide filter.
  • the transmission line filter may be a low pass filter, and the dielectric resonator connected to the dielectric resonator at the other end may be a band elimination filter.
  • the dielectric resonator connected to the dielectric resonator at the other end functions as a band elimination filter, so that a steeper attenuation can be obtained at the passband end of the dielectric composite filter.
  • a high-frequency module includes the above-described dielectric composite filter, and a substrate on which a connection electrode having the same shape as a wiring conductor of the dielectric composite filter is formed. The wiring conductor and the connection electrode of the substrate are combined.
  • a high-frequency front-end circuit includes the above-described dielectric composite filter connected to an antenna element, a transmission amplifier circuit that amplifies a high-frequency transmission signal to be transmitted to the antenna element, and reception by the antenna element.
  • a reception amplifier circuit that amplifies the received high-frequency received signal, a transmission amplifier circuit, the reception amplifier circuit, and a switch circuit that switches connection between the dielectric composite filter.
  • a high-frequency front-end circuit includes a transmission amplifier circuit that amplifies a high-frequency transmission signal output from an RF signal processing circuit, and a reception amplifier circuit that amplifies a high-frequency reception signal and outputs the amplified signal to the RF signal processing circuit And the above-mentioned dielectric composite filter disposed between the RF signal processing circuit and the transmission amplifier circuit or between the RF signal processing circuit and the reception amplifier circuit.
  • a communication apparatus is connected to an antenna element, and amplifies a high-frequency signal transmitted and received by the antenna element.
  • the communication apparatus is connected to the high-frequency front-end circuit and the high-frequency front-end circuit.
  • An RF signal processing circuit that performs signal processing including frequency conversion between a high-frequency signal and a baseband signal, and a baseband signal processing circuit that is connected to the RF signal processing circuit and performs signal processing on the baseband signal.
  • a Massive MIMO system includes an antenna including a plurality of patch antennas arranged in a matrix and the above-described dielectric composite filter for each patch antenna.
  • a dielectric composite filter with low insertion loss while suppressing spurious, and a high-frequency front-end circuit, a communication device, and a Massive MIMO system using the dielectric composite filter are obtained. It is done.
  • FIG. 1 is a perspective view showing a structure of a dielectric composite filter according to Embodiment 1.
  • FIG. FIG. 2 is a plan view of a substrate on which the dielectric composite filter according to Embodiment 1 is mounted.
  • FIG. 3 is a graph showing the characteristics of the dielectric composite filter according to the first embodiment.
  • FIG. 4 is a perspective view showing the structure of the dielectric composite filter according to the second embodiment.
  • FIG. 5 is a graph showing the characteristics of the dielectric composite filter according to the second embodiment.
  • FIG. 6 is a perspective view showing a structure of a dielectric composite filter according to a comparative example of the second embodiment.
  • FIG. 7 is a graph showing characteristics of the transmission line filter according to the comparative example of the second embodiment.
  • FIG. 8 is a perspective view showing the structure of the dielectric composite filter according to the third embodiment.
  • FIG. 9 is a perspective view showing the structure of another dielectric composite filter according to the third embodiment.
  • FIG. 10 is an exploded perspective view showing the structure of the dielectric composite filter according to the fourth embodiment.
  • FIG. 11 is a perspective view showing the structure of the dielectric composite filter according to the fourth embodiment.
  • FIG. 12 is an exploded perspective view showing the structure of another dielectric composite filter according to the fifth embodiment.
  • FIG. 13A is a circuit diagram showing a high-frequency front-end circuit and a communication device according to Embodiment 6.
  • FIG. 13B is a circuit diagram showing a high-frequency front-end circuit according to Modification 1 of Embodiment 6.
  • FIG. 13A is a circuit diagram showing a high-frequency front-end circuit and a communication device according to Embodiment 6.
  • FIG. 13B is a circuit diagram showing a high-frequency front-end circuit according to Modification 1 of Embodiment
  • FIG. 13C is a circuit diagram showing a high-frequency front-end circuit according to Modification 2 of Embodiment 6.
  • FIG. 14A is a circuit diagram showing a Massive MIMO system according to Embodiment 7.
  • FIG. 14B is a plan view of the antenna device of the Massive MIMO system according to Embodiment 7.
  • FIG. 1 is a perspective view showing an example of the structure of the dielectric composite filter according to the first embodiment.
  • the dielectric composite filter 1 includes a waveguide filter 10 and a transmission line filter 21.
  • the waveguide filter 10 is formed by connecting a plurality of dielectric resonators 12 to 15.
  • the waveguide filter 10 is formed by covering a substantially rectangular parallelepiped dielectric block 40 provided with a plurality of grooves 40a and 40b with a conductive film 50, and a region divided by the grooves 40a and 40b is a dielectric resonator 12. Functions as ⁇ 15.
  • the dielectric block 40 is made of, for example, a dielectric material such as crystal or ceramic, and the grooves 40a and 40b are provided by machining using, for example, a wire saw.
  • the conductive film 50 is formed, for example, by applying and baking a conductive paste containing silver. In FIG. 1, a conductive film 50 is formed in a hatched area on the surface of the dielectric block 40, and the dielectric block 40 is exposed in a white area. Although not shown in FIG. 1, the conductive coating 50 is also formed on the back side and left side surfaces of the dielectric block 40.
  • the dielectric resonators 12 and 15 at both ends are provided with input / output units 18 and 19 for converting a signal propagation mode between a TE (Transverse Electric) mode and a TEM (Transverse ElectroMagnetic) mode, respectively.
  • TE Transverse Electric
  • TEM Transverse ElectroMagnetic
  • the TE mode and the TEM mode are signal propagation modes inside and outside the waveguide filter 10, respectively.
  • the transmission line filter 21 includes a dielectric block connected to the dielectric resonator 12 and a wiring conductor 53 formed on the surface of the dielectric block and extending from the input / output unit 18.
  • the dielectric block constituting the transmission line filter 21 is one end portion divided by the groove 40 b of the dielectric block 40. That is, the transmission line filter 21 and the waveguide filter 10 are integrally formed using a single dielectric block 40.
  • the term “wiring conductor 53” extending from the input / output unit 18 means that the wiring conductor 53 is a part of the conductive coating 50 and is connected to a portion of the conductive coating 50 that constitutes the input / output unit 18. It may mean that.
  • the wiring conductor 53 has a plurality of portions having different widths, and a region where the conductive coating 50 is not disposed is provided around the wiring conductor 53.
  • the width of the wiring conductor 53 refers to a dimension in a direction orthogonal to the signal propagation direction in the wiring conductor 53.
  • the transmission line filter 21 functions as a low-pass filter.
  • the wiring conductor 53 may be formed by applying and baking a conductive paste containing silver.
  • the wiring conductor 53 and the input / output unit 18 are formed on the same surface of the dielectric block 40 constituting the dielectric composite filter 1 (the surface shown on the front side in FIG. 1).
  • the dielectric composite filter 1 is mounted on the substrate on the surface.
  • this surface is referred to as a mounting surface.
  • a conductive coating 51 is formed on the surface of the transmission line filter 21 opposite to the surface on which the wiring conductor 53 is formed (the back side surface in FIG. 1).
  • the conductive film 51 (including the wiring conductor 53) formed on the surface of the transmission line filter 21 may be the same conductor film as the conductive film 51 formed on the surface of the waveguide filter 10.
  • FIG. 2 is a plan view showing an example of a substrate 80 on which the dielectric composite filter 1 is mounted. The broken line represents the mounting position of the dielectric composite filter 1.
  • a conductive foil 81 is laid on the substrate 80.
  • the substrate 80 is made of, for example, a resin such as epoxy or phenol, and the conductor foil 81 is made of, for example, a copper foil.
  • the conductor foil 81 is disposed in a region indicated by oblique lines on the surface of the substrate 80 and is not disposed in a white region.
  • the conductor foil 81 extends from a corresponding position of the input / output unit 18 of the dielectric composite filter 1 and constitutes a connection electrode 82 having the same shape as the wiring conductor 53. Further, a coplanar line 83 connected to the connection electrode 82 and a coplanar line 84 extending from a corresponding position of the input / output unit 19 of the dielectric composite filter 1 are configured. Other portions of the conductor foil 81 constitute a ground plane.
  • connection electrode 82 of the substrate 80 and the wiring conductor 53 of the dielectric composite filter 1 are joined by a conductive joining material such as solder to constitute the high frequency module 8.
  • An application circuit using the high-frequency module 8 inputs and outputs signals to the dielectric composite filter 1 via the coplanar lines 83 and 84 of the substrate 80.
  • the fact that the wiring conductor 53 and the connection electrode 82 have the same shape is not limited to the fact that the shape of the wiring conductor 53 and the shape of the connection electrode 82 are exactly the same.
  • a shape having the same design and including a manufacturing error may be included in the same shape.
  • shapes having overlapping regions that can be joined to each other through a conductive bonding material such as solder may be included in the same shape.
  • FIG. 3 is a graph showing an example of pass characteristics (frequency dependence of insertion loss) of the dielectric composite filter 1.
  • FIG. 3 shows the simulation results of the pass characteristics of the waveguide filter 10 and the transmission line filter 21 separated from the dielectric composite filter 1 and the pass characteristics of the dielectric composite filter 1 as a whole. The loss is shown normalized to 0 dB.
  • the transmission line filter 21 can supplement the frequency characteristics of the waveguide filter 10. Specifically, insufficient transmission of spurious due to the waveguide filter 10 is compensated by the transmission line filter 21 that is a low-pass filter.
  • the transmission line filter 21 is connected to the dielectric resonator 12 having the input / output unit 18 of the waveguide filter 10 and is connected to the input / output unit 18 by a wiring conductor 53 formed on the surface of the dielectric block.
  • the wiring conductor 53 can be significantly shortened, and radiation loss from the wiring conductor 53 can be kept small.
  • the radiation loss from the wiring conductor 53 can be reduced by shielding the wiring conductor 53 with the conductive coating 50.
  • the dielectric composite filter 1 having excellent frequency characteristics and low insertion loss can be obtained.
  • the dielectric resonator 12 of the waveguide filter 10 and the transmission line filter 21 are connected to each other and can be integrally formed from a single dielectric block 40.
  • integrally forming the waveguide filter 10 and the transmission line filter 21 from a single dielectric block 40 the manufacturing process of the dielectric composite filter 1 is simplified, and variations in frequency characteristics are also suppressed.
  • the dielectric composite filter 1 can be surface-mounted with the same surface as a mounting surface. This simplifies the structure of the dielectric composite filter 1 and enables downsizing.
  • the radiation loss from the wiring conductor 53 is further reduced, and the insertion loss of the dielectric composite filter 1 is further reduced.
  • Embodiment 2 In Embodiment 1, although the transmission line filter 21 which functions as a low-pass filter was illustrated, a transmission line filter is not restricted to a low-pass filter. In the second embodiment, a dielectric composite filter in which the transmission line filter is a band elimination filter or a notch filter will be described.
  • FIG. 4 is a perspective view showing an example of the structure of the dielectric composite filter according to the second embodiment.
  • the dielectric composite filter 2 shown in FIG. 4 is configured by replacing the transmission line filter 21 of the dielectric composite filter 1 of FIG. Since the other components of the dielectric composite filter 2 are the same as those of the dielectric composite filter 1, the same reference numerals are given and description thereof is omitted.
  • the transmission line filter 22 includes a dielectric block connected to the dielectric resonator 12 and a wiring conductor 54 formed on the surface of the dielectric block and extending from the input / output unit 18.
  • the dielectric block constituting the transmission line filter 22 is one end portion divided by the groove 40 b of the dielectric block 40. That is, the transmission line filter 22 and the waveguide filter 10 are integrally formed using a single dielectric block 40.
  • the wiring conductor 54 has a main conductor 56 provided in the signal propagation direction in the wiring conductor 54 and a plurality of open stubs 57 and 58 branched from the main conductor 56. A region where the coating 50 is not disposed is provided. Thereby, the transmission line filter 22 functions as a band elimination filter or a notch filter.
  • the wiring conductor 54 and the input / output unit 18 are formed on the mounting surface of the dielectric composite filter 2 (the surface shown on the front side in FIG. 4).
  • FIG. 5 is a graph showing an example of the pass characteristic of the dielectric composite filter 2.
  • FIG. 5 shows the simulation results of the pass characteristics of the waveguide filter 10 and the transmission line filter 22 separated from the dielectric composite filter 2 and the pass characteristics of the dielectric composite filter 2 as a whole. The loss is shown normalized to 0 dB.
  • the radiation loss from the wiring conductor 54 can be kept small.
  • the dielectric composite filter 2 having excellent frequency characteristics and low insertion loss can be obtained.
  • FIG. 6 is a perspective view showing an example of the structure of the dielectric composite filter according to the comparative example of the second embodiment.
  • the dielectric composite filter 3 shown in FIG. 6 is configured by replacing the transmission line filter 22 of the dielectric composite filter 2 of FIG. Since the other components of the dielectric composite filter 3 are the same as those of the dielectric composite filter 2, the same reference numerals are given and description thereof is omitted.
  • the transmission line filter 23 is configured by changing the open stub 58 of the transmission line filter 22 to an open stub 59 extending to the same side as the open stub 57 of the main conductor 56.
  • FIG. 7 is a graph showing an example of pass characteristics of the transmission line filters 22 and 23.
  • FIG. 7 shows the simulation results of the transmission characteristics of the transmission line filters 22 and 23 separated from the dielectric composite filters 2 and 3, respectively, with the minimum loss within the display range normalized to 0 dB.
  • the transmission line filter 23 has a smaller attenuation than the transmission line filter 22 at a frequency of 38 GHz or more corresponding to spurious. This is thought to be because the open stubs are connected to the same side of the main conductor and coupling occurs between the open stubs, thereby reducing the attenuation.
  • the transmission line filter 22 that opens the open stubs 57 and 58 to both sides of the main conductor 56 is more than the transmission line filter 23 that opens the open stubs 57 and 59 only to one side of the main conductor 56. It can be said that it is excellent.
  • the dielectric composite filter formed by connecting the transmission line filter to one end of the waveguide filter is illustrated, but the dielectric composite filter is not limited to this example.
  • a dielectric composite filter in which a dielectric resonator is further connected to the other end of the waveguide filter will be described.
  • FIG. 8 is a perspective view showing an example of the structure of the dielectric composite filter according to the third embodiment.
  • the dielectric composite filter 4 shown in FIG. 8 is different from the dielectric composite filter 1 of FIG. 1 in that the waveguide filter 11 is changed, and a transmission line filter 21 and a dielectric are formed at one end and the other end of the waveguide filter 11.
  • the body resonators 31 are connected to each other.
  • the waveguide filter 11 is configured by adding a dielectric resonator 16 to the waveguide filter 10. Since the other components of the dielectric composite filter 4 are the same as those of the dielectric composite filter 1, the same reference numerals are given and description thereof is omitted.
  • the dielectric resonator 31 is connected to the dielectric resonator 15.
  • the dielectric resonator 31 is an end portion divided by the groove 40 c of the dielectric block 40. That is, the dielectric resonator 31 and the waveguide filter 11 are integrally formed using a single dielectric block 40.
  • the dielectric resonator 31 functions as a band elimination filter and further improves the frequency characteristics of the dielectric composite filter 4 by giving large attenuation to the frequency in the vicinity of the pass band.
  • FIG. 9 is a perspective view showing an example of the structure of another dielectric composite filter according to the third embodiment.
  • the dielectric composite filter 5 shown in FIG. 9 is configured by replacing the transmission line filter 21 of the dielectric composite filter 4 of FIG. Since the other components of the dielectric composite filter 5 are the same as those of the dielectric composite filter 4, the same reference numerals are given and description thereof is omitted. Also in the dielectric composite filter 5, the frequency characteristics are improved by the dielectric resonator 31 as in the case of the dielectric composite filter 4.
  • the dielectric composite filter according to Embodiment 4 is a dielectric composite filter formed by bonding a first part and a second part of a dielectric composite filter provided separately.
  • FIG. 10 is an exploded perspective view showing an example of the structure of the dielectric composite filter according to the fourth embodiment.
  • the dielectric composite filter 6 includes a first portion 61 and a second portion 62.
  • the first portion 61 and the second portion 62 are shown as seen from different viewpoints.
  • the dielectric composite filter 6 corresponds to a portion composed of the transmission line filter 22 and the waveguide filter 11 in the dielectric composite filter 5 of FIG.
  • the constituent elements of the dielectric composite filter 6 are denoted by the same reference numerals as the corresponding constituent elements of the dielectric composite filter 5.
  • the first portion 61 is formed by connecting the transmission line filter 22 and the dielectric resonators 12 and 13a.
  • the first portion 61 is formed by covering a substantially rectangular parallelepiped dielectric block 41 provided with a plurality of grooves 41a and 41b with a conductive film 51, and a region divided by the grooves 41a and 41b is the transmission line filter 22, dielectric It functions as the body resonators 12 and 13a.
  • the transmission line filter 22 is provided with a wiring conductor 54 similar to that shown in FIG.
  • the second portion 62 is formed by connecting the dielectric resonators 14a, 16, and 15.
  • the second portion 62 is formed by covering a substantially rectangular parallelepiped dielectric block 42 provided with a plurality of grooves 42 a with a conductive film 52, and regions divided by the grooves 42 a are used as dielectric resonators 14 a, 16, and 15. Function.
  • the dielectric resonators 13 a and 14 a are provided with coupling windows 51 a and 52 a through which electromagnetic waves can pass through the dielectric resonators 13 and 14 of the dielectric composite filter 5.
  • the coupling windows 51a and 52a are formed by not disposing the conductive films 51 and 52.
  • the dielectric composite filter 6 is configured by bonding the first portion 61 and the second portion 62 with, for example, an adhesive.
  • FIG. 11 is a perspective view showing an example of the dielectric composite filter 6 after the first portion 61 and the second portion 62 are bonded together.
  • Dielectric resonators 13a and 14a are coupled via coupling windows 51a and 52a.
  • the dielectric composite filter 6 functions substantially the same as the portion constituted by the transmission line filter 22 and the waveguide filter 11 of the dielectric composite filter 5 of FIG. To do.
  • the transmission line filter in the dielectric composite filter 6 is not limited to the transmission line filter 22, and for example, the transmission line filter 21 of FIG. 8 may be used.
  • the dielectric composite filter 6 functions substantially the same as the portion constituted by the transmission line filter 21 and the waveguide filter 11 of the dielectric composite filter 4 of FIG.
  • FIG. 12 is an exploded perspective view showing an example of the structure of another dielectric composite filter according to the fourth embodiment. As shown in FIG. 12, the dielectric composite filter 7 is configured by bonding the first portion 71 and the second portion 72 together.
  • a desired attenuation pole is added by providing coupling windows 51 b and 52 b in the dielectric resonators 12 a and 16 a.
  • the dielectric composite filter formed by bonding a plurality of parts provided separately is not limited to the above example.
  • the third portion and the fourth portion may be further bonded to the invisible surface on the side.
  • a dielectric having a two-story structure in which the first portion 61 and the second portion 62 are located in the first layer including the mounting surface, and the third portion and the fourth portion are located in the second layer above the mounting surface.
  • a body composite filter is constructed. In such a dielectric composite filter, for example, the arrangement of the coupling window is changed and added so that a signal is transmitted in the order of the first portion 61, the third portion, the fourth portion, and the second portion 62.
  • FIG. 13A is a circuit diagram showing the high-frequency front-end circuit 110 and its peripheral circuits according to the sixth embodiment.
  • a high-frequency front-end circuit 110 an antenna element 150, an RF signal processing circuit 191 and a baseband signal processing circuit 192 are shown.
  • the high-frequency front end circuit 110 includes filters 161, 162, and 163, a switch circuit 170, a power amplifier circuit 181, and a low noise amplifier circuit 182.
  • the power amplifier circuit 181 is a transmission amplification circuit that amplifies the high-frequency transmission signal output from the RF signal processing circuit 191 and outputs the amplified signal to the antenna element 150 via the switch circuit 170 and the filter 161.
  • the low noise amplifier circuit 182 is a reception amplification circuit that amplifies a high-frequency signal that has passed through the antenna element 150, the filter 161, and the switch circuit 170 and outputs the amplified signal to the RF signal processing circuit 191.
  • the filter 161 is an antenna filter that is connected to the antenna element 150 and selectively allows high-frequency signals in the transmission band and the reception band to pass therethrough, for example.
  • the filter 162 is an interstage filter that is disposed between the power amplifier circuit 181 and the RF signal processing circuit 191 and selectively passes a high-frequency signal in the transmission band.
  • the filter 163 is an interstage filter that is disposed between the low noise amplifier circuit 182 and the RF signal processing circuit 191 and selectively passes a high frequency signal in the reception band.
  • the switch circuit 170 is a switch that switches connection between the antenna element 150 and the transmission signal path and the reception signal path.
  • the RF signal processing circuit 191 processes the high-frequency reception signal input from the antenna element 150 via the reception signal path by down-conversion or the like, and the baseband signal processing circuit 192 generates the reception signal generated by the signal processing. Output to.
  • the RF signal processing circuit 191 is, for example, an RFIC (Radio Frequency Integrated Circuit). Further, the RF signal processing circuit 191 performs signal processing on the transmission signal input from the baseband signal processing circuit 192 by up-conversion or the like, and outputs the high-frequency transmission signal generated by the signal processing to the power amplifier circuit 181.
  • the signal processed by the baseband signal processing circuit 192 is used, for example, for displaying an image as an image signal or for calling as an audio signal.
  • the high-frequency front end circuit 110 may include other circuit elements between the filters 161, 162, and 163, the switch circuit 170, the power amplifier circuit 181, and the low noise amplifier circuit 182.
  • the dielectric composite filters according to the first to fourth embodiments can be used as the filters 161, 162, and 163.
  • the filters 161, 162, and 163 achieve a small insertion loss while suppressing spurious, so that a high-frequency front-end circuit having excellent high-frequency characteristics can be realized.
  • FIG. 13B is a circuit diagram showing the high-frequency front end circuit 110B according to the first modification of the sixth embodiment.
  • the high frequency front end circuit 110 ⁇ / b> B includes filters 161, 162 and 163, a power amplifier circuit 181, a low noise amplifier circuit 182, a circulator 171, and a switch circuit 172.
  • the high-frequency front end circuit 110B according to this modification is different from the high-frequency front end circuit 110 in the configuration for switching between the transmission signal path and the reception signal path.
  • the description of the same configuration as that of the high-frequency front end circuit 110 will be omitted, and a description will be given focusing on different configurations.
  • the circulator 171 has an antenna-side terminal, a transmission-side terminal, and a reception-side terminal. During reception, the circulator 171 selectively propagates a reception signal from the antenna element 150 to the reception signal path, and at the time of transmission, the antenna element 150 is transmitted from the transmission signal path. This is a circuit element that selectively propagates a transmission signal to.
  • the switch circuit 172 is a switch for switching the connection between the circulator 171 and the reception signal path.
  • the receiving side terminal of the circulator 171 is terminated with a terminating resistor (50 ⁇ ).
  • the reception side terminal of the circulator 171 is connected to the low noise amplifier circuit 182.
  • the high-frequency front end circuit 110B is applied as a time division duplex front-end circuit.
  • the dielectric composite filters according to the first to fourth embodiments can be used as the filters 161, 162, and 163.
  • FIG. 13C is a circuit diagram showing a high-frequency front-end circuit 110C according to the second modification of the sixth embodiment.
  • the high frequency front end circuit 110 ⁇ / b> C includes a duplexer 164, filters 162 and 163, a power amplifier circuit 181, a low noise amplifier circuit 182, and an isolator 173.
  • the high-frequency front end circuit 110C according to this modification is different from the high-frequency front end circuit 110 in the configuration for switching between the transmission signal path and the reception signal path.
  • the description of the same configuration as that of the high-frequency front end circuit 110 will be omitted, and a description will be given focusing on different configurations.
  • the duplexer 164 has an antenna terminal, a transmission side terminal, and a reception side terminal, has a transmission filter between the antenna terminal and the transmission side terminal, and has a reception filter between the antenna terminal and the reception side terminal. Have.
  • the isolator 173 is a circuit element that is disposed between the transmission-side terminal of the duplexer 164 and the power amplifier circuit 181 and propagates a transmission signal in one direction from the power amplifier circuit 181 to the duplexer 164.
  • the isolator 173 can be realized, for example, by terminating one terminal among the three terminals of the circulator by 50 ⁇ .
  • the high frequency front end circuit 110C is applied as a front end circuit of a frequency division duplex system.
  • the dielectric composite filter according to the first to fourth embodiments can be used as the transmission-side filter and the reception-side filter of the duplexer 164 and the filters 162 and 163.
  • the phantom cell is a network configuration that separates a control signal for ensuring communication stability between a macro cell in a low frequency band and a small cell in a high frequency band and a data signal that is a target of high-speed data communication.
  • Each phantom cell is provided with a Massive MIMO antenna device.
  • the Massive MIMO system is a technique for improving transmission quality in a millimeter wave band or the like, and controls the directivity of the antenna element by controlling a signal transmitted from each antenna element.
  • the Massive MIMO system uses a large number of antenna elements, and therefore can generate a sharp directional beam.
  • By increasing the directivity of the beam it is possible to fly radio waves to some extent even in a high frequency band, and it is possible to reduce the interference between cells and increase the frequency utilization efficiency.
  • FIG. 14A is a circuit diagram showing a Massive MIMO system according to Embodiment 7.
  • FIG. 14B is a plan view of the antenna device of the Massive MIMO system according to Embodiment 7.
  • the antenna device 111 shown in FIG. 14B is used in the Massive MIMO system shown in FIG. 14A.
  • the antenna device 111 includes a plurality of patch antennas 112 arranged in a matrix.
  • FIG. 14A is a diagram illustrating a configuration of a high-frequency front-end circuit 110A including the antenna device 111.
  • This high-frequency front end circuit 110A is a Massive MIMO system according to the present embodiment.
  • the patch antenna 112 is connected with band-pass filters 161a, 161b and 161c.
  • a switch circuit 170a is connected between the filter 161a, the power amplifier circuit 181a, and the low noise amplifier circuit 182a.
  • a switch circuit 170b is connected between the filter 161b, the power amplifier circuit 181b, and the low noise amplifier circuit 182b.
  • a switch circuit 170c is connected between the filter 161c, the power amplifier circuit 181c, and the low noise amplifier circuit 182c.
  • the low noise amplifier circuits 182a, 182b, and 182c are connected to the baseband signal processing circuit 192.
  • a band pass filter 162a and a mixer 194a are connected between the baseband signal processing circuit 192 and the power amplifier circuit 181a.
  • a band-pass filter 162b and a mixer 194b are connected between the baseband signal processing circuit 192 and the power amplifier circuit 181b.
  • a band-pass filter 162c and a mixer 194c are connected between the baseband signal processing circuit 192 and the power amplifier circuit 181c.
  • a local oscillator 193 is connected to the mixers 194a, 194b and 194c. The local oscillator 193 outputs, to the mixers 194a to 194c, a reference frequency for up-conversion to a high frequency and down-conversion to a low frequency in the mixers 194a to 194c.
  • Filters 161a to 161c pass the transmission / reception frequency band and remove other frequency components.
  • the switch circuits 170a to 170c switch between a transmission signal and a reception signal.
  • the filters 162a to 162c pass the frequency band of the transmission signal and remove other frequency components.
  • the dielectric composite filters 161a to 161c and 162a to 162c can be used as the filters 161a to 161c and 162a to 162c.
  • the filters 161a to 161c connected to the patch antenna 112 may be arranged on the back surface of the substrate on which the patch antenna 112 is formed. Thereby, the antenna device 111 including the patch antenna 112 with the filters 161a to 161c is configured.
  • the filters 161a to 161c and 162a to 162c achieve a small insertion loss while suppressing spurious, so that a Massive MIMO system having excellent high-frequency characteristics can be realized. Is possible.
  • the present invention is not limited to individual embodiments. Unless it deviates from the gist of the present invention, the embodiment in which various modifications conceived by those skilled in the art have been made in the present embodiment, and forms constructed by combining components in different embodiments are also applicable to one or more of the present invention. It may be included within the scope of the embodiments.
  • the present invention can be widely used in communication devices such as millimeter wave mobile communication systems and massive MIMO systems as dielectric composite filters with low insertion loss while suppressing spurious.
  • Dielectric Composite Filter 8 High Frequency Module 10, 11 Waveguide Filter 12-16, 12a-14a, 16a, 31 Dielectric Resonator 18, 19 Input / Output Unit 21-23 Transmission Line Filter 40-42 Dielectric Block 40a, 40b, 40c, 41a, 41b, 42a Groove 50-52 Conductive coating 51a, 51b, 52a, 52b Coupling window 53, 54 Wiring conductor 56 Main conductor 57-59 Open stub 80 Substrate 81 Conductive foil 82 Connection electrode 83, 84 Coplanar lines 110, 110A to 110C High-frequency front end circuit 111 Antenna device 112 Patch antenna 150 Antenna element 161, 161a to 161c, 162, 162a to 162c, 163 Filter 164 Duplexer 1 0,170a ⁇ 170c, 172 switching circuit 171 circulator 173 isolators 181,181a ⁇ 181c power amplifier circuit 182,182a ⁇ 182c low-noise amplifier circuit

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Abstract

La présente invention concerne un filtre composite diélectrique (1) comprenant : un filtre de guide d'ondes (10) qui est formé par couplage d'une pluralité de résonateurs diélectriques (12-15), et dans lequel une partie d'entrée/sortie (18) pour convertir un mode de propagation de signal est disposée au moins dans le résonateur diélectrique (12) à une extrémité; et un filtre de ligne de transmission (21) qui comprend un bloc diélectrique couplé au résonateur diélectrique (12), et un conducteur de câblage (53) formé sur la surface du bloc diélectrique et s'étendant à partir de la partie d'entrée/sortie (18). À titre d'exemple, le filtre de ligne de transmission (21) peut être un filtre passe-bas, et le conducteur de câblage (53) peuvent avoir au moins deux parties ayant des largeurs différentes, chaque largeur étant une taille dans une direction orthogonale à la direction de propagation de signal du conducteur de câblage (53).
PCT/JP2017/036181 2016-11-18 2017-10-04 FILTRE COMPOSITE DIÉLECTRIQUE, MODULE HAUTE FRÉQUENCE, CIRCUIT FRONTAL HAUTE FRÉQUENCE, DISPOSITIF DE COMMUNICATION ET SYSTÈME MIMO Massif WO2018092453A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023276879A1 (fr) * 2021-07-02 2023-01-05 株式会社村田製作所 Dispositif de filtre, dispositif d'antenne et module d'antenne

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6150303U (fr) * 1984-09-07 1986-04-04
JPH11312902A (ja) * 1998-04-30 1999-11-09 Murata Mfg Co Ltd 誘電体フィルタ、送受共用器および通信機
JP2016171557A (ja) * 2015-03-13 2016-09-23 東光株式会社 誘電体導波管の入出力構造、誘電体導波管の実装構造、誘電体導波管フィルタおよびＭａｓｓｉｖｅＭＩＭＯシステム

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6150303U (fr) * 1984-09-07 1986-04-04
JPH11312902A (ja) * 1998-04-30 1999-11-09 Murata Mfg Co Ltd 誘電体フィルタ、送受共用器および通信機
JP2016171557A (ja) * 2015-03-13 2016-09-23 東光株式会社 誘電体導波管の入出力構造、誘電体導波管の実装構造、誘電体導波管フィルタおよびＭａｓｓｉｖｅＭＩＭＯシステム

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023276879A1 (fr) * 2021-07-02 2023-01-05 株式会社村田製作所 Dispositif de filtre, dispositif d'antenne et module d'antenne

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