WO2016075852A1 - Bandpass filter and wireless communication device - Google Patents

Bandpass filter and wireless communication device Download PDF

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Publication number
WO2016075852A1
WO2016075852A1 PCT/JP2015/004409 JP2015004409W WO2016075852A1 WO 2016075852 A1 WO2016075852 A1 WO 2016075852A1 JP 2015004409 W JP2015004409 W JP 2015004409W WO 2016075852 A1 WO2016075852 A1 WO 2016075852A1
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Prior art keywords
resonators
dielectric plate
bandpass filter
housing
band
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PCT/JP2015/004409
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French (fr)
Japanese (ja)
Inventor
宮本　貴裕
典久 城山
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日本電気株式会社
Ｎｅｃエンジニアリング株式会社
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Publication of WO2016075852A1 publication Critical patent/WO2016075852A1/en

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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
    • H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities

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  • the present invention relates to a bandpass filter and a radio communication device, and more particularly to a bandpass filter and a radio communication device capable of changing a pass band.
  • Patent Document 1 discloses a technique related to a bandpass filter that can change the passband.
  • a displaceable dielectric is disposed in a metal casing of a semi-coaxial band-pass filter, and the resonance frequency of the resonator is changed by moving the dielectric.
  • Patent Documents 2 to 4 also disclose techniques related to a bandpass filter that can change the passband.
  • a displaceable dielectric is disposed in a metal casing of a semi-coaxial bandpass filter, and the resonator is moved by moving the dielectric.
  • the resonance frequency is changed.
  • a dielectric member is disposed in each stage of a plurality of stages of semi-coaxial resonators, and a mechanism for simultaneously moving each separately provided dielectric member is provided. . For this reason, there has been a problem that the structure of the bandpass filter becomes complicated.
  • an object of the present invention is to simplify the structure of a bandpass filter in a bandpass filter that can change the passband.
  • the band-pass filter according to the present invention includes a conductive housing having a cavity inside, a plurality of conductive housings disposed inside the housing, one end connected to the housing and the other end being an open end. And a dielectric plate that extends in a direction in which the plurality of resonators are arranged, is adjacent to the plurality of resonators, and is capable of changing a relative position with respect to the plurality of resonators.
  • the wireless communication apparatus includes a transmission circuit that generates a transmission signal, a first bandpass filter that removes unnecessary frequency components from the transmission signal output from the transmission circuit, and the first bandpass filter.
  • An antenna for receiving the received signal, a second bandpass filter for removing unnecessary frequency components from the received signal received by the antenna, and the second bandpass A reception circuit that performs reception processing on a reception signal that has been processed by the filter, and at least one of the first and second bandpass filters is configured using the bandpass filter.
  • the present invention can simplify the structure of a bandpass filter in a bandpass filter whose passband can be changed.
  • FIG. 1 is a perspective view showing a bandpass filter according to a first exemplary embodiment.
  • FIG. 2 is a cross-sectional view taken along section line II-II in FIG.
  • FIG. 3 is a cross-sectional view taken along section line III-III in FIG. It is a perspective view which shows the other structural example of a resonator. It is a perspective view which shows the other structural example of a resonator.
  • FIG. 6 is a perspective view showing a bandpass filter according to a second exemplary embodiment.
  • FIG. 5 is a cross-sectional view taken along a cutting line VII-VII in FIG. 4.
  • FIG. 6 is a perspective view showing a bandpass filter according to a third embodiment.
  • FIG. 1 is a perspective view showing a bandpass filter according to a first exemplary embodiment.
  • FIG. 2 is a cross-sectional view taken along section line II-II in FIG.
  • FIG. 3 is a cross-sectional view taken along section line III-III
  • FIG. 6 is a top view showing a bandpass filter according to a third exemplary embodiment.
  • FIG. 6 is a front view showing a bandpass filter according to a third exemplary embodiment.
  • FIG. 8 is a cross-sectional view taken along a cutting line XI-XI in FIG. 7. It is a graph which shows the filter characteristic of a band pass filter.
  • It is a perspective view which shows the other structural example of a dielectric material board.
  • FIG. 1 is a perspective view showing a band-pass filter 1 according to the first embodiment.
  • 2 and 3 are cross-sectional views taken along section line II-II and section line III-III in FIG. 1, respectively.
  • the bandpass filter 1 according to the present embodiment includes a bandpass formed of a three-stage cavity resonator including three resonators 11_1 to 11_3 inside a housing 10. It is a filter.
  • a three-stage band-pass filter will be described as an example, but the number of stages of the band-pass filter according to the present embodiment may be any number as long as it is two or more.
  • the housing 10 is a conductive member having a cavity inside.
  • the housing 10 can be configured using a housing body having a recess that can accommodate the resonators 11_1 to 11_3 and the like, and a lid that covers the opening of the housing body.
  • the resonators 11_1 to 11_3 are disposed inside the housing 10. One end of each of the resonators 11_1 to 11_3 is connected (fixed) to the bottom surface of the housing 10. The other ends of the resonators 11_1 to 11_3 are open ends (that is, not in contact with other members).
  • the resonators 11_1 to 11_3 can be configured using a conductor or a dielectric.
  • the resonators 11_1 to 11_3 can be cylindrical.
  • the shape of the resonators 11_1 to 11_3 is not limited to a cylindrical shape.
  • a shape 17 in other words, a cylindrical shape with a part missing
  • a rectangular parallelepiped shape 18 including a cube
  • Partition portions 13a and 13b are arranged between the respective resonators 11_1 to 11_3. Specifically, a partition 13a is disposed between the resonator 11_1 and the resonator 11_2, and a partition 13b is disposed between the resonator 11_2 and the resonator 11_3.
  • the partition portions 13 a and 13 b partition a part of the internal space of the housing 10, and one side surface of the partition portions 13 a and 13 b may not be in contact with the housing 10.
  • each of the resonators 11_1 to 11_3 is provided in a cavity partitioned by the partition portions 13a and 13b, and each cavity in which each of the resonators 11_1 to 11_3 is provided is spatially continuous. ing.
  • a terminal (first terminal) 14a is electrically connected to the resonator 11_1 disposed on one end side of the housing 10.
  • a terminal (second terminal) 14b is electrically connected to the resonator 11_3 arranged on the other end side of the housing 10.
  • the terminals 14a and 14b are configured using conductive members, and the terminals 14a and 14b and the conductive members 15a and 15b configure a coaxial line.
  • the terminals 14a and 14b have a rectangular cross-sectional shape, but the terminals 14a and 14b may have any shape.
  • the dielectric plate 12 extends in the direction in which the plurality of resonators 11_1 to 11_3 are arranged (that is, the longitudinal direction of the housing 10), is adjacent to the plurality of resonators 11_1 to 11_3, and is connected to the plurality of resonators 11_1 to 11_3.
  • the relative position can be changed.
  • the dielectric plate 12 can be configured using alumina.
  • the dielectric plate 12 is disposed so that the side surface of the dielectric plate 12 faces the side surface of the resonators 11_1 to 11_3 (see particularly FIG. 3).
  • the dielectric plate 12 is moved in a direction perpendicular to the main surface (surface having the largest area) of the dielectric plate 12 (the direction of the arrow in FIG. 3), so that the relative position of the dielectric plate 12 with respect to the resonators 11_1 to 11_3 is increased.
  • the electromagnetic field distribution inside the housing 10 can be affected.
  • the pass band of the band pass filter 1 can be changed.
  • the pass band is a frequency band through which electromagnetic waves pass, and this frequency band is determined by the resonance frequency (peak) and the bandwidth.
  • the resonance frequency of the pass band of the bandpass filter 1 decreases. To do. Conversely, the farther away the dielectric plate 12 is from the open end side of the resonators 11_1 to 11_3 where the electric field is concentrated (the more the dielectric plate 12 moves downward), the more the resonance frequency of the pass band of the bandpass filter 1 becomes. Get higher.
  • a support rod (not shown) is attached to the dielectric plate 12, and the support plate is moved using a stepping motor (not shown) provided outside the bandpass filter 1, thereby moving the dielectric plate 12.
  • a stepping motor (not shown) provided outside the bandpass filter 1, thereby moving the dielectric plate 12.
  • a displaceable dielectric is disposed in a metal casing of a semi-coaxial bandpass filter, and the resonator is moved by moving the dielectric.
  • the resonance frequency of was changed.
  • a dielectric member is disposed in each stage of a plurality of stages of semi-coaxial resonators, and a mechanism for simultaneously moving each separately provided dielectric member is provided. . For this reason, there has been a problem that the structure of the bandpass filter becomes complicated.
  • the plurality of resonators 11_1 to 11_3 extend in the direction in which the resonators 11_1 to 11_3 are arranged (that is, the longitudinal direction of the housing 10), and are adjacent to the plurality of resonators 11_1 to 11_3.
  • the pass band of the bandpass filter 1 is changed by displacing the dielectric plate 12 arranged to do so. That is, in the bandpass filter 1 according to the present embodiment, since one dielectric plate 12 is arranged across the plurality of resonators 11_1 to 11_3, the structure of the bandpass filter can be simplified. it can.
  • the semi-coaxial band-pass filter as shown in FIGS. 1 to 3 has a property that the Q value is high.
  • the passband of the bandpass filter can be made variable without degrading the Q value of the bandpass filter. Can do.
  • the bandpass filter structure can be simplified in the bandpass filter that can change the passband.
  • FIG. 6 is a perspective view of the bandpass filter 2 according to the second embodiment.
  • 7 is a cross-sectional view taken along section line VII-VII in FIG.
  • the band-pass filter 2 according to the present embodiment is a band-pass configured by a three-stage cavity resonator including three resonators 11_1 to 11_3 inside a housing 10. It is a filter.
  • the bandpass filter 2 according to the present embodiment is different in the configuration of the dielectric plate 22 from the bandpass filter 1 described in the first embodiment. Other than this, the configuration is the same as that of the bandpass filter 1 described in the first embodiment. Therefore, the same components are denoted by the same reference numerals, and redundant description is omitted.
  • the housing 10 is a conductive member having a cavity inside.
  • the housing 10 can be configured using a housing body having a recess that can accommodate the resonators 11_1 to 11_3 and the like, and a lid that covers the opening of the housing body.
  • the resonators 11_1 to 11_3 are disposed inside the housing 10.
  • the configurations of the resonators 11_1 to 11_3 are the same as those of the bandpass filter 1 described in the first embodiment.
  • the resonators 11_1 to 11_3 have a plate shape (that is, a plate shape in which the side surface facing the main surface of the dielectric plate 22 is the main surface). (Refer to the resonators 31_1 to 31_3 in FIG. 8).
  • the shapes of the resonators 11_1 to 11_3 are plate-like, the area of the surface facing the dielectric plate 22 can be increased, and the frequency variable amount can be increased.
  • Partition portions 13a and 13b are arranged between the respective resonators 11_1 to 11_3. Specifically, a partition 13a is disposed between the resonator 11_1 and the resonator 11_2, and a partition 13b is disposed between the resonator 11_2 and the resonator 11_3.
  • the dielectric plate 22 extends in the direction in which the plurality of resonators 11_1 to 11_3 are arranged (that is, the longitudinal direction of the housing 10), is adjacent to the plurality of resonators 11_1 to 11_3, and is connected to the plurality of resonators 11_1 to 11_3.
  • the relative position can be changed.
  • the dielectric plate 22 can be configured using alumina.
  • the dielectric plate 22 is disposed on the side surface side of the resonators 11_1 to 11_3 (see particularly FIG. 7).
  • the dielectric plate 22 is disposed so that the main surface (surface having the largest area) of the dielectric plate 22 faces the side surfaces (side surfaces of the cylinders) of the plurality of resonators 11_1 to 11_3. Then, by moving the dielectric plate 22 in the horizontal direction (the arrow direction in FIG. 7), the distance between the main surface of the dielectric plate 22 and the side surfaces of the plurality of resonators 11_1 to 11_3 is changed. 10 can influence the electromagnetic field distribution inside. Thereby, the pass band of the band pass filter 2 can be changed.
  • the resonance frequency of the pass band of the bandpass filter 2 decreases. Conversely, the farther away the dielectric plate 22 is from the side surfaces of the resonators 11_1 to 11_3 where the electric field is concentrated, the higher the resonance frequency of the pass band of the bandpass filter 2 becomes.
  • a support rod (not shown) is attached to the dielectric plate 22, and the support plate is moved using a stepping motor (not shown) provided outside the bandpass filter 2 to move the dielectric plate 22.
  • a stepping motor (not shown) provided outside the bandpass filter 2 to move the dielectric plate 22.
  • the plurality of resonators 11_1 to 11_3 extend in the direction in which the resonators 11_1 to 11_3 are arranged (that is, the longitudinal direction of the housing 10), and are disposed adjacent to the plurality of resonators 11_1 to 11_3.
  • the pass band of the band-pass filter 2 is changed by displacing the dielectric plate 22 thus formed. That is, in the band-pass filter 2 according to the present embodiment, since one dielectric plate 22 is arranged across the plurality of resonators 11_1 to 11_3, the structure of the band-pass filter can be simplified. it can.
  • the bandpass filter structure can be simplified in the bandpass filter that can change the passband.
  • FIGS. 8 to 10 are a perspective view, a top view, and a front view, respectively, showing the bandpass filter 3 according to the third embodiment.
  • FIG. 11 is a cross-sectional view taken along section line XI-XI in FIG.
  • the bandpass filter 3 according to the present embodiment includes a bandpass formed of a three-stage cavity resonator including three resonators 31_1 to 31_3 inside a housing 30. It is a filter.
  • a three-stage band-pass filter will be described as an example, but the number of stages of the band-pass filter according to the present embodiment may be any number as long as it is two or more.
  • the housing 30 is a conductive member having a cavity inside.
  • the housing 30 can be configured using a housing body having a recess that can accommodate the resonators 31_1 to 31_3 and the like, and a lid that covers the opening of the housing body.
  • the resonators 31_1 to 31_3 are disposed inside the housing 30. One end of each of the resonators 31_1 to 31_3 is connected (fixed) to the bottom surface of the housing 30. The other ends of the resonators 31_1 to 31_3 are open ends (that is, not in contact with other members).
  • the resonators 31_1 to 31_3 can be configured using a conductor or a dielectric.
  • the resonators 31_1 to 31_3 have a plate shape (that is, a plate shape in which the side surface facing the side surface of the dielectric plate 32 is the main surface).
  • the shapes of the resonators 31_1 to 31_3 may be cylindrical, the shape 17 obtained by cutting the column as shown in FIG. 4 into a half, or a rectangular parallelepiped shape 18 (as shown in FIG. Including a cube).
  • the cut surface of the shape 17 is disposed so as to face the dielectric plate 32, thereby reducing the area of the surface facing the dielectric plate 32. Can be increased.
  • Partition portions 33a and 33b are arranged between the respective resonators 31_1 to 31_3. Specifically, a partition 33a is disposed between the resonator 31_1 and the resonator 31_2, and a partition 33b is disposed between the resonator 31_2 and the resonator 31_3.
  • the partition portions 33 a and 33 b partition a part of the internal space of the housing 30, and one side surface and upper surface of the partition portions 33 a and 33 b are not in contact with the housing 30.
  • each of the resonators 31_1 to 31_3 is provided in a cavity partitioned by the partition portions 33a and 33b, and each cavity in which each of the resonators 31_1 to 31_3 is provided is spatially continuous. ing.
  • the housing 30 and the partition portions 33a and 33b may be integrally formed. That is, when forming the housing
  • the lines 34a and 34b and the conductive members 35a and 35b constitute a coaxial line.
  • the lines 34a and 34b have a rectangular cross-sectional shape, but the lines 34a and 34b may have any shape.
  • line 34a is bent in the L shape inside the housing
  • a part of the line 34a is disposed so as to face the main surface of the dielectric plate 32 (see FIG. 10).
  • a line (second line) 34 b is disposed at the other end of the housing 30.
  • the line 34 b is covered with a covering portion (insulating material) 35 b outside the housing 30.
  • line 34b is bent in the L shape inside the housing
  • the frequency of the bandpass filter 3 is changed by displacing the dielectric plate 32 by arranging a part of the lines 34a and 34b so as to face the main surface of the dielectric plate 32, the input line
  • the external Q values of the output lines 34a and 34b and the first stage resonator can be kept constant. Therefore, the frequency range that can be varied while keeping the bandwidth constant can be expanded.
  • the dielectric plate 32 extends in the direction in which the plurality of resonators 31_1 to 31_3 are arranged (that is, the longitudinal direction of the housing 30), is adjacent to the plurality of resonators 31_1 to 31_3, and is connected to the plurality of resonators 31_1 to 31_3.
  • the relative position can be changed.
  • the dielectric plate 32 can be configured using alumina.
  • the dielectric plate 32 is disposed on the side surface side of the resonators 31_1 to 31_3. That is, the dielectric plate 32 is disposed so that the side surface of the dielectric plate 32 faces the side surfaces of the plurality of resonators 31_1 to 31_3 (see particularly FIG. 11).
  • the electromagnetic field distribution inside the housing 30 can be affected. Thereby, the pass band of the band pass filter 3 can be changed.
  • the amount of change in bandwidth when the resonance frequency of the bandpass filter 3 changes can be reduced.
  • the coupling change between the resonators 31_1 to 31_3 when the resonance frequency of the bandpass filter 3 is changed is optimized by adjusting the notch amount of the dielectric plate 32.
  • the bandwidth of 3 can be kept constant.
  • the notches 37a and 37b are formed at corresponding positions between the respective resonators 31_1 to 31_3 (see particularly FIG. 11).
  • through holes 52a and 52b may be formed at positions corresponding to the respective resonators 31_1 to 31_3.
  • the cross-sectional shapes of the through holes 52a and 52b may be quadrangular, and the cross-sectional shapes of the through holes 56a and 56b may be circular as in the dielectric plate 32 ′′ shown in FIG.
  • the bandwidth is narrowed when the resonance frequency of the bandpass filter 3 is lowered, and the bandwidth is widened when the resonance frequency is raised.
  • the support rods 36 a and 36 b are attached to the dielectric plate 32, and the support rods 36 a and 36 b are displaced using a stepping motor (not shown) provided outside the bandpass filter 3, thereby allowing the dielectric plate 32 to move. Can be moved.
  • a stepping motor not shown
  • FIG. 12 is a graph showing the filter characteristics (simulation results) of the bandpass filter. As shown in FIG. 12, in the bandpass filter 3 according to the present embodiment, the resonance frequency of the bandpass filter can be made variable by about 700 MHz.
  • the plurality of resonators 31_1 to 31_3 extend in the direction in which the resonators 31_1 to 31_3 are arranged (that is, the longitudinal direction of the housing 30) and are arranged adjacent to the plurality of resonators 31_1 to 31_3.
  • the pass band of the bandpass filter 3 is changed by displacing the dielectric plate 32 that has been moved. That is, in the band-pass filter 3 according to the present embodiment, since one dielectric plate 32 is arranged across the plurality of resonators 31_1 to 31_3, the structure of the band-pass filter can be simplified. it can.
  • the bandpass filter structure can be simplified in the bandpass filter that can change the passband.
  • the case where one dielectric plate is disposed inside the housing has been described.
  • two dielectric plates are disposed inside the housing.
  • the configuration of the first embodiment described above and the configuration of the second embodiment may be combined. That is, the dielectric plate 12 and the dielectric plate 22 (see the second embodiment) may be disposed inside the housing 10 of the bandpass filter 1 described in the first embodiment. If two dielectric plates are arranged inside the housing in this way, the structure of the bandpass filter is slightly complicated. However, by arranging two dielectric plates, the passband of the bandpass filter can be adjusted over a wide range. Will be able to.
  • notches and through holes may be provided in the dielectric plates 12 and 22 of the bandpass filters 1 and 2 described in the first and second embodiments (see FIGS. 11, 13, and 14). .
  • a wireless communication device 60 illustrated in FIG. 15 includes a transmission circuit 61, an antenna 62, a reception circuit 63, a bandpass filter 64, a circulator 65, and a bandpass filter 66.
  • the band-pass filters 64 and 66 the band-pass filters 1 to 3 according to the present invention described above can be used.
  • the transmission circuit 61 generates a transmission signal and supplies the generated transmission signal to the band pass filter 64.
  • the band pass filter 64 removes unnecessary frequency components included in the transmission signal, and supplies the circulator 65 with the transmission signal after removing unnecessary frequency components.
  • the circulator 65 outputs the transmission signal supplied from the bandpass filter 64 to the antenna 62.
  • the antenna 62 wirelessly transmits the transmission signal supplied from the circulator 65.
  • the received signal received by the antenna 62 is supplied to the band pass filter 66 via the circulator 65.
  • the band pass filter 66 removes unnecessary frequency components included in the reception signal, and supplies the reception signal after removing unnecessary frequency components to the reception circuit 63.
  • the reception circuit 63 performs reception processing such as demodulation processing on the reception signal supplied from the bandpass filter 66 to obtain predetermined information.
  • the configuration of the wireless communication device 60 can be simplified.
  • the bandpass filters 1 to 3 according to the present invention even when a plurality of bandpass filters are required, a single bandpass filter can be used.

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  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

The bandpass filter (1) according to the present invention is provided with: an electroconductive housing (10) having an internal cavity; a plurality of resonators (11_1-11_3) disposed in the housing (10), each having one end connected to the housing (10) and the other end being an open end; and a dielectric plate (12) for which the relative position thereof in relation to the plurality of resonators (11_1-11_3) can be changed, the dielectric plate extending in the direction in which the plurality of resonators (11_1-11_3) are aligned and being disposed so as to be adjacent to the plurality of resonators (11_1-11_3).

Description

バンドパスフィルタ、及び無線通信装置BANDPASS FILTER AND RADIO COMMUNICATION DEVICE
　本発明はバンドパスフィルタ、及び無線通信装置に関し、特に通過帯域を変更可能なバンドパスフィルタ、及び無線通信装置に関する。 The present invention relates to a bandpass filter and a radio communication device, and more particularly to a bandpass filter and a radio communication device capable of changing a pass band.
　マイクロ波、ミリ波帯を用いて送受信を行う無線通信システムにおいては、所定の周波数帯域の信号のみを通過させ、不要な周波数成分を除去するためにバンドパスフィルタが用いられる。特許文献１には、通過帯域を変更することができるバンドパスフィルタに関する技術が開示されている。特許文献１に開示されている技術では、半同軸型のバンドパスフィルタの金属筐体内に、変位可能な誘電体を配置し、この誘電体を動かすことによって共振器の共振周波数を変化させている。また、特許文献２乃至４にも、通過帯域を変更可能なバンドパスフィルタに関する技術が開示されている。 In a wireless communication system that performs transmission and reception using a microwave and millimeter wave band, a band-pass filter is used to pass only a signal in a predetermined frequency band and remove unnecessary frequency components. Patent Document 1 discloses a technique related to a bandpass filter that can change the passband. In the technique disclosed in Patent Document 1, a displaceable dielectric is disposed in a metal casing of a semi-coaxial band-pass filter, and the resonance frequency of the resonator is changed by moving the dielectric. . Patent Documents 2 to 4 also disclose techniques related to a bandpass filter that can change the passband.
特許第４１７８２６４号公報Japanese Patent No. 4178264 特開２０１１－００９８０６号公報JP 2011-009806 A 特開２００６－２３７８２４号公報JP 2006-237824 A 特開２００６－１２１４６３号公報JP 2006-121463 A
　背景技術で説明したように、特許文献１に開示されている技術では、半同軸型のバンドパスフィルタの金属筐体内に、変位可能な誘電体を配置し、この誘電体を動かすことによって共振器の共振周波数を変化させている。しかしながら、特許文献１にかかるバンドパスフィルタでは、複数段の半同軸共振器の各々の段に誘電体部材を各々配置し、別個に設けられた各々の誘電体部材を同時に動かす機構を設けている。このため、バンドパスフィルタの構造が複雑になるという問題があった。 As described in the background art, in the technique disclosed in Patent Document 1, a displaceable dielectric is disposed in a metal casing of a semi-coaxial bandpass filter, and the resonator is moved by moving the dielectric. The resonance frequency is changed. However, in the bandpass filter according to Patent Document 1, a dielectric member is disposed in each stage of a plurality of stages of semi-coaxial resonators, and a mechanism for simultaneously moving each separately provided dielectric member is provided. . For this reason, there has been a problem that the structure of the bandpass filter becomes complicated.
　上記課題に鑑み本発明の目的は、通過帯域を変更可能なバンドパスフィルタにおいて、バンドパスフィルタの構造を簡素化することである。 In view of the above problems, an object of the present invention is to simplify the structure of a bandpass filter in a bandpass filter that can change the passband.
　本発明にかかるバンドパスフィルタは、内部に空胴を有する導電性の筐体と、前記筐体の内部に配置され、一端が前記筐体に接続され他端が開放端となっている複数の共振体と、前記複数の共振体が並んでいる方向に延び、前記複数の共振体と隣接するように配置され、前記複数の共振体に対する相対的な位置を変更可能な誘電体板と、を備える。 The band-pass filter according to the present invention includes a conductive housing having a cavity inside, a plurality of conductive housings disposed inside the housing, one end connected to the housing and the other end being an open end. And a dielectric plate that extends in a direction in which the plurality of resonators are arranged, is adjacent to the plurality of resonators, and is capable of changing a relative position with respect to the plurality of resonators. Prepare.
　本発明にかかる無線通信装置は、送信信号を生成する送信回路と、前記送信回路から出力された送信信号から不要な周波数成分を除去する第１のバンドパスフィルタと、前記第１のバンドパスフィルタで処理された後の送信信号を送信すると共に、受信信号を受信するアンテナと、前記アンテナで受信した受信信号から不要な周波数成分を除去する第２のバンドパスフィルタと、前記第２のバンドパスフィルタで処理された後の受信信号に対して受信処理を実施する受信回路と、を備え、前記第１および第２のバンドパスフィルタの少なくとも一方は、上記のバンドパスフィルタを用いて構成されている。 The wireless communication apparatus according to the present invention includes a transmission circuit that generates a transmission signal, a first bandpass filter that removes unnecessary frequency components from the transmission signal output from the transmission circuit, and the first bandpass filter. An antenna for receiving the received signal, a second bandpass filter for removing unnecessary frequency components from the received signal received by the antenna, and the second bandpass A reception circuit that performs reception processing on a reception signal that has been processed by the filter, and at least one of the first and second bandpass filters is configured using the bandpass filter. Yes.
　本発明により、通過帯域を変更可能なバンドパスフィルタにおいて、バンドパスフィルタの構造を簡素化することができる。 The present invention can simplify the structure of a bandpass filter in a bandpass filter whose passband can be changed.
実施の形態１にかかるバンドパスフィルタを示す斜視図である。1 is a perspective view showing a bandpass filter according to a first exemplary embodiment. 図１の切断線ＩＩ－ＩＩにおける断面図である。FIG. 2 is a cross-sectional view taken along section line II-II in FIG. 図１の切断線ＩＩＩ－ＩＩＩにおける断面図である。FIG. 3 is a cross-sectional view taken along section line III-III in FIG. 共振体の他の構成例を示す斜視図である。It is a perspective view which shows the other structural example of a resonator. 共振体の他の構成例を示す斜視図である。It is a perspective view which shows the other structural example of a resonator. 実施の形態２にかかるバンドパスフィルタを示す斜視図である。FIG. 6 is a perspective view showing a bandpass filter according to a second exemplary embodiment. 図４の切断線ＶＩＩ－ＶＩＩにおける断面図である。FIG. 5 is a cross-sectional view taken along a cutting line VII-VII in FIG. 4. 実施の形態３にかかるバンドパスフィルタを示す斜視図である。FIG. 6 is a perspective view showing a bandpass filter according to a third embodiment. 実施の形態３にかかるバンドパスフィルタを示す上面図である。FIG. 6 is a top view showing a bandpass filter according to a third exemplary embodiment. 実施の形態３にかかるバンドパスフィルタを示す正面図である。FIG. 6 is a front view showing a bandpass filter according to a third exemplary embodiment. 図７の切断線ＸＩ－ＸＩにおける断面図である。FIG. 8 is a cross-sectional view taken along a cutting line XI-XI in FIG. 7. バンドパスフィルタのフィルタ特性を示すグラフである。It is a graph which shows the filter characteristic of a band pass filter. 誘電体板の他の構成例を示す斜視図である。It is a perspective view which shows the other structural example of a dielectric material board. 誘電体板の他の構成例を示す斜視図である。It is a perspective view which shows the other structural example of a dielectric material board. 本発明にかかるバンドパスフィルタを備える無線通信装置を示す図である。It is a figure which shows a radio | wireless communication apparatus provided with the band pass filter concerning this invention.
＜実施の形態１＞
　以下、図面を参照して本発明の実施の形態について説明する。
　図１は、実施の形態１にかかるバンドパスフィルタ１を示す斜視図である。図２及び図３はそれぞれ、図１の切断線ＩＩ－ＩＩおよび切断線ＩＩＩ－ＩＩＩにおける断面図である。図１～図３に示すように、本実施の形態にかかるバンドパスフィルタ１は、筐体１０の内部に３つの共振体１１_１～１１_３を備える３段の空胴共振器で構成されたバンドパスフィルタである。なお、以下では３段のバンドパスフィルタを一例として説明するが、本実施の形態にかかるバンドパスフィルタの段数は２段以上であれば何段でもよい。 <Embodiment 1>
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing a band-pass filter 1 according to the first embodiment. 2 and 3 are cross-sectional views taken along section line II-II and section line III-III in FIG. 1, respectively. As shown in FIGS. 1 to 3, the bandpass filter 1 according to the present embodiment includes a bandpass formed of a three-stage cavity resonator including three resonators 11_1 to 11_3 inside a housing 10. It is a filter. In the following, a three-stage band-pass filter will be described as an example, but the number of stages of the band-pass filter according to the present embodiment may be any number as long as it is two or more.
　筐体１０は、内部に空胴を有する導電性の部材である。例えば、筐体１０は、共振体１１_１～１１_３等を収納可能な凹部を有する筐体本体と、当該筐体本体の開口部をカバーする蓋体とを用いて構成することができる。 The housing 10 is a conductive member having a cavity inside. For example, the housing 10 can be configured using a housing body having a recess that can accommodate the resonators 11_1 to 11_3 and the like, and a lid that covers the opening of the housing body.
　共振体１１_１～１１_３は、筐体１０の内部に配置されている。各々の共振体１１_１～１１_３の一端は筐体１０の底面に接続（固定）されている。各々の共振体１１_１～１１_３の他端は開放端（つまり、他の部材と接していない）となっている。例えば、共振体１１_１～１１_３は導体または誘電体を用いて構成することができる。また、例えば共振体１１_１～１１_３は円柱状とすることができる。なお、共振体１１_１～１１_３の形状は円柱状に限定されることはなく、例えば、図４に示すような円柱を半分に切断した形状１７（換言すると、一部が欠けた円柱状）や図５に示すような直方体状１８（立方体を含む）としてもよい。 The resonators 11_1 to 11_3 are disposed inside the housing 10. One end of each of the resonators 11_1 to 11_3 is connected (fixed) to the bottom surface of the housing 10. The other ends of the resonators 11_1 to 11_3 are open ends (that is, not in contact with other members). For example, the resonators 11_1 to 11_3 can be configured using a conductor or a dielectric. Further, for example, the resonators 11_1 to 11_3 can be cylindrical. Note that the shape of the resonators 11_1 to 11_3 is not limited to a cylindrical shape. For example, a shape 17 (in other words, a cylindrical shape with a part missing) such as that shown in FIG. A rectangular parallelepiped shape 18 (including a cube) as shown in FIG.
　各々の共振体１１_１～１１_３の間には、仕切り部１３ａ、１３ｂが配置されている。具体的には、共振体１１_１と共振体１１_２との間には仕切り部１３ａが配置され、共振体１１_２と共振体１１_３との間には仕切り部１３ｂが配置されている。ここで、仕切り部１３ａ、１３ｂは、筐体１０の内部空間の一部を仕切っており、仕切り部１３ａ、１３ｂの一方の側面は筐体１０と接していなくてもよい。換言すると、各々の共振体１１_１～１１_３は仕切り部１３ａ、１３ｂで仕切られた空胴に設けられており、各々の共振体１１_１～１１_３が設けられている各々の空胴は空間的に連続している。なお、本実施の形態にかかるバンドパスフィルタ１では、必ずしも仕切り部１３ａ、１３ｂを設ける必要はなく、適宜、省略してもよい。 Partition portions 13a and 13b are arranged between the respective resonators 11_1 to 11_3. Specifically, a partition 13a is disposed between the resonator 11_1 and the resonator 11_2, and a partition 13b is disposed between the resonator 11_2 and the resonator 11_3. Here, the partition portions 13 a and 13 b partition a part of the internal space of the housing 10, and one side surface of the partition portions 13 a and 13 b may not be in contact with the housing 10. In other words, each of the resonators 11_1 to 11_3 is provided in a cavity partitioned by the partition portions 13a and 13b, and each cavity in which each of the resonators 11_1 to 11_3 is provided is spatially continuous. ing. In addition, in the band pass filter 1 concerning this Embodiment, it is not necessary to necessarily provide the partition parts 13a and 13b, and may be abbreviate | omitted suitably.
　筐体１０の一方の端部側に配置された共振体１１_１には端子（第１の端子）１４ａが電気的に接続されている。また、筐体１０の他方の端部側に配置された共振体１１_３には端子（第２の端子）１４ｂが電気的に接続されている。端子１４ａ、１４ｂは導電性の部材を用いて構成されており、端子１４ａ、１４ｂおよび導電性の部材１５ａ、１５ｂは同軸線路を構成している。図１では端子１４ａ、１４ｂは矩形断面形状を有しているが、端子１４ａ、１４ｂの形状は任意の形状とすることができる。 A terminal (first terminal) 14a is electrically connected to the resonator 11_1 disposed on one end side of the housing 10. A terminal (second terminal) 14b is electrically connected to the resonator 11_3 arranged on the other end side of the housing 10. The terminals 14a and 14b are configured using conductive members, and the terminals 14a and 14b and the conductive members 15a and 15b configure a coaxial line. In FIG. 1, the terminals 14a and 14b have a rectangular cross-sectional shape, but the terminals 14a and 14b may have any shape.
　誘電体板１２は、複数の共振体１１_１～１１_３が並んでいる方向（つまり、筐体１０の長手方向）に延び、複数の共振体１１_１～１１_３と隣接し、複数の共振体１１_１～１１_３に対する相対的な位置を変更可能に配置されている。例えば、誘電体板１２はアルミナを用いて構成することができる。図１～図３に示すバンドパスフィルタ１では、誘電体板１２は、誘電体板１２の側面が共振体１１_１～１１_３の側面と対向するように配置されている（特に、図３参照）。そして、誘電体板１２の主面（面積が最も大きい面）と垂直な方向（図３の矢印方向）に誘電体板１２を動かして、共振体１１_１～１１_３に対する誘電体板１２の相対的な位置を変更することで、筐体１０の内部における電磁界分布に影響を与えることができる。これにより、バンドパスフィルタ１の通過帯域を変更することができる。ここで、通過帯域とは電磁波が通過する周波数帯域であり、この周波数帯域は共振周波数（ピーク）と帯域幅によって決定される。 The dielectric plate 12 extends in the direction in which the plurality of resonators 11_1 to 11_3 are arranged (that is, the longitudinal direction of the housing 10), is adjacent to the plurality of resonators 11_1 to 11_3, and is connected to the plurality of resonators 11_1 to 11_3. The relative position can be changed. For example, the dielectric plate 12 can be configured using alumina. In the band-pass filter 1 shown in FIGS. 1 to 3, the dielectric plate 12 is disposed so that the side surface of the dielectric plate 12 faces the side surface of the resonators 11_1 to 11_3 (see particularly FIG. 3). Then, the dielectric plate 12 is moved in a direction perpendicular to the main surface (surface having the largest area) of the dielectric plate 12 (the direction of the arrow in FIG. 3), so that the relative position of the dielectric plate 12 with respect to the resonators 11_1 to 11_3 is increased. By changing the position, the electromagnetic field distribution inside the housing 10 can be affected. Thereby, the pass band of the band pass filter 1 can be changed. Here, the pass band is a frequency band through which electromagnetic waves pass, and this frequency band is determined by the resonance frequency (peak) and the bandwidth.
　例えば、電界が集中している共振体１１_１～１１_３の開放端側に誘電体板１２が近づくほど（誘電体板１２が上方に移動するほど）、バンドパスフィルタ１の通過帯域の共振周波数が低下する。逆に、電界が集中している共振体１１_１～１１_３の開放端側から誘電体板１２が遠ざかるほど（誘電体板１２が下方に移動するほど）、バンドパスフィルタ１の通過帯域の共振周波数が高くなる。 For example, as the dielectric plate 12 approaches the open ends of the resonators 11_1 to 11_3 where the electric field is concentrated (as the dielectric plate 12 moves upward), the resonance frequency of the pass band of the bandpass filter 1 decreases. To do. Conversely, the farther away the dielectric plate 12 is from the open end side of the resonators 11_1 to 11_3 where the electric field is concentrated (the more the dielectric plate 12 moves downward), the more the resonance frequency of the pass band of the bandpass filter 1 becomes. Get higher.
　例えば、誘電体板１２に支持棒（不図示）を取り付け、この支持棒をバンドパスフィルタ１の外に設けられたステッピングモータ（不図示）を用いて変位させることで、誘電体板１２を移動させることができる。 For example, a support rod (not shown) is attached to the dielectric plate 12, and the support plate is moved using a stepping motor (not shown) provided outside the bandpass filter 1, thereby moving the dielectric plate 12. Can be made.
　背景技術で説明したように、特許文献１に開示されている技術では、半同軸型のバンドパスフィルタの金属筐体内に、変位可能な誘電体を配置し、この誘電体を動かすことによって共振器の共振周波数を変化させていた。しかしながら、特許文献１にかかるバンドパスフィルタでは、複数段の半同軸共振器の各々の段に誘電体部材を各々配置し、別個に設けられた各々の誘電体部材を同時に動かす機構を設けている。このため、バンドパスフィルタの構造が複雑になるという問題があった。 As described in the background art, in the technique disclosed in Patent Document 1, a displaceable dielectric is disposed in a metal casing of a semi-coaxial bandpass filter, and the resonator is moved by moving the dielectric. The resonance frequency of was changed. However, in the bandpass filter according to Patent Document 1, a dielectric member is disposed in each stage of a plurality of stages of semi-coaxial resonators, and a mechanism for simultaneously moving each separately provided dielectric member is provided. . For this reason, there has been a problem that the structure of the bandpass filter becomes complicated.
　これに対して本実施の形態にかかるバンドパスフィルタ１では、複数の共振体１１_１～１１_３が並んでいる方向（つまり、筐体１０の長手方向）に延び、複数の共振体１１_１～１１_３と隣接するように配置された誘電体板１２を変位させることで、バンドパスフィルタ１の通過帯域を変更している。つまり、本実施の形態にかかるバンドパスフィルタ１では、複数の共振体１１_１～１１_３に渡って１枚の誘電体板１２を配置する構成としているので、バンドパスフィルタの構造を簡素化することができる。 In contrast, in the band-pass filter 1 according to the present embodiment, the plurality of resonators 11_1 to 11_3 extend in the direction in which the resonators 11_1 to 11_3 are arranged (that is, the longitudinal direction of the housing 10), and are adjacent to the plurality of resonators 11_1 to 11_3. The pass band of the bandpass filter 1 is changed by displacing the dielectric plate 12 arranged to do so. That is, in the bandpass filter 1 according to the present embodiment, since one dielectric plate 12 is arranged across the plurality of resonators 11_1 to 11_3, the structure of the bandpass filter can be simplified. it can.
　また、図１～図３に示すような半同軸型のバンドパスフィルタはＱ値が高いという性質を備える。本実施の形態にかかる発明では、この半同軸型のバンドパスフィルタに誘電体板１２を設けることで、バンドパスフィルタのＱ値を劣化させることなく、バンドパスフィルタの通過帯域を可変にすることができる。 In addition, the semi-coaxial band-pass filter as shown in FIGS. 1 to 3 has a property that the Q value is high. In the invention according to the present embodiment, by providing the dielectric plate 12 to this semi-coaxial bandpass filter, the passband of the bandpass filter can be made variable without degrading the Q value of the bandpass filter. Can do.
　以上で説明した本実施の形態にかかる発明により、通過帯域を変更可能なバンドパスフィルタにおいて、バンドパスフィルタの構造を簡素化することができる。 With the invention according to the present embodiment described above, the bandpass filter structure can be simplified in the bandpass filter that can change the passband.
＜実施の形態２＞
　次に、本発明の実施の形態２について説明する。
　図６は、実施の形態２にかかるバンドパスフィルタ２を示す斜視図である。図７は、図６の切断線ＶＩＩ－ＶＩＩにおける断面図である。図６、図７に示すように、本実施の形態にかかるバンドパスフィルタ２は、筐体１０の内部に３つの共振体１１_１～１１_３を備える３段の空胴共振器で構成されたバンドパスフィルタである。なお、本実施の形態にかかるバンドパスフィルタ２は、実施の形態１で説明したバンドパスフィルタ１と比べて、誘電体板２２の構成が異なる。これ以外は実施の形態１で説明したバンドパスフィルタ１と同様であるので、同一の構成要素には同一の符号を付し重複した説明は省略する。 <Embodiment 2>
Next, a second embodiment of the present invention will be described.
FIG. 6 is a perspective view of the bandpass filter 2 according to the second embodiment. 7 is a cross-sectional view taken along section line VII-VII in FIG. As shown in FIGS. 6 and 7, the band-pass filter 2 according to the present embodiment is a band-pass configured by a three-stage cavity resonator including three resonators 11_1 to 11_3 inside a housing 10. It is a filter. Note that the bandpass filter 2 according to the present embodiment is different in the configuration of the dielectric plate 22 from the bandpass filter 1 described in the first embodiment. Other than this, the configuration is the same as that of the bandpass filter 1 described in the first embodiment. Therefore, the same components are denoted by the same reference numerals, and redundant description is omitted.
　筐体１０は、内部に空胴を有する導電性の部材である。例えば、筐体１０は、共振体１１_１～１１_３等を収納可能な凹部を有する筐体本体と、当該筐体本体の開口部をカバーする蓋体とを用いて構成することができる。 The housing 10 is a conductive member having a cavity inside. For example, the housing 10 can be configured using a housing body having a recess that can accommodate the resonators 11_1 to 11_3 and the like, and a lid that covers the opening of the housing body.
　共振体１１_１～１１_３は、筐体１０の内部に配置されている。共振体１１_１～１１_３の構成については実施の形態１で説明したバンドパスフィルタ１の場合と同様である。なお、本実施の形態にかかるバンドパスフィルタ２では、共振体１１_１～１１_３の形状を板状（つまり、誘電体板２２の主面と対向している側面が主面となっている板状）としてもよい（図８の共振体３１_１～３１_３参照）。共振体１１_１～１１_３の形状を板状とした場合は、誘電体板２２と対向する面の面積を増やすことができ、周波数可変量を増やすことができる。 The resonators 11_1 to 11_3 are disposed inside the housing 10. The configurations of the resonators 11_1 to 11_3 are the same as those of the bandpass filter 1 described in the first embodiment. In the bandpass filter 2 according to the present embodiment, the resonators 11_1 to 11_3 have a plate shape (that is, a plate shape in which the side surface facing the main surface of the dielectric plate 22 is the main surface). (Refer to the resonators 31_1 to 31_3 in FIG. 8). When the shapes of the resonators 11_1 to 11_3 are plate-like, the area of the surface facing the dielectric plate 22 can be increased, and the frequency variable amount can be increased.
　各々の共振体１１_１～１１_３の間には、仕切り部１３ａ、１３ｂが配置されている。具体的には、共振体１１_１と共振体１１_２との間には仕切り部１３ａが配置され、共振体１１_２と共振体１１_３との間には仕切り部１３ｂが配置されている。 Partition portions 13a and 13b are arranged between the respective resonators 11_1 to 11_3. Specifically, a partition 13a is disposed between the resonator 11_1 and the resonator 11_2, and a partition 13b is disposed between the resonator 11_2 and the resonator 11_3.
　誘電体板２２は、複数の共振体１１_１～１１_３が並んでいる方向（つまり、筐体１０の長手方向）に延び、複数の共振体１１_１～１１_３と隣接し、複数の共振体１１_１～１１_３に対する相対的な位置を変更可能に配置されている。例えば、誘電体板２２はアルミナを用いて構成することができる。本実施の形態にかかるバンドパスフィルタ２では、誘電体板２２は共振体１１_１～１１_３の側面側に配置されている（特に、図７参照）。換言すると、誘電体板２２は、当該誘電体板２２の主面（面積が最も大きい面）が複数の共振体１１_１～１１_３の側面（円柱の側面）と対向するように配置されている。そして、誘電体板２２を横方向（図７の矢印方向）に動かして、誘電体板２２の主面と複数の共振体１１_１～１１_３の側面との間の距離を変更することで、筐体１０の内部における電磁界分布に影響を与えることができる。これにより、バンドパスフィルタ２の通過帯域を変更することができる。 The dielectric plate 22 extends in the direction in which the plurality of resonators 11_1 to 11_3 are arranged (that is, the longitudinal direction of the housing 10), is adjacent to the plurality of resonators 11_1 to 11_3, and is connected to the plurality of resonators 11_1 to 11_3. The relative position can be changed. For example, the dielectric plate 22 can be configured using alumina. In the band-pass filter 2 according to the present embodiment, the dielectric plate 22 is disposed on the side surface side of the resonators 11_1 to 11_3 (see particularly FIG. 7). In other words, the dielectric plate 22 is disposed so that the main surface (surface having the largest area) of the dielectric plate 22 faces the side surfaces (side surfaces of the cylinders) of the plurality of resonators 11_1 to 11_3. Then, by moving the dielectric plate 22 in the horizontal direction (the arrow direction in FIG. 7), the distance between the main surface of the dielectric plate 22 and the side surfaces of the plurality of resonators 11_1 to 11_3 is changed. 10 can influence the electromagnetic field distribution inside. Thereby, the pass band of the band pass filter 2 can be changed.
　例えば、電界が集中している共振体１１_１～１１_３の側面に誘電体板２２が近づくほど、バンドパスフィルタ２の通過帯域の共振周波数が低下する。逆に、電界が集中している共振体１１_１～１１_３の側面から誘電体板２２が遠ざかるほど、バンドパスフィルタ２の通過帯域の共振周波数が高くなる。 For example, as the dielectric plate 22 approaches the side surfaces of the resonators 11_1 to 11_3 where the electric field is concentrated, the resonance frequency of the pass band of the bandpass filter 2 decreases. Conversely, the farther away the dielectric plate 22 is from the side surfaces of the resonators 11_1 to 11_3 where the electric field is concentrated, the higher the resonance frequency of the pass band of the bandpass filter 2 becomes.
　例えば、誘電体板２２に支持棒（不図示）を取り付け、この支持棒をバンドパスフィルタ２の外に設けられたステッピングモータ（不図示）を用いて変位させることで、誘電体板２２を移動させることができる。 For example, a support rod (not shown) is attached to the dielectric plate 22, and the support plate is moved using a stepping motor (not shown) provided outside the bandpass filter 2 to move the dielectric plate 22. Can be made.
　本実施の形態にかかるバンドパスフィルタ２では、複数の共振体１１_１～１１_３が並んでいる方向（つまり、筐体１０の長手方向）に延び、複数の共振体１１_１～１１_３と隣接するように配置された誘電体板２２を変位させることで、バンドパスフィルタ２の通過帯域を変更している。つまり、本実施の形態にかかるバンドパスフィルタ２では、複数の共振体１１_１～１１_３に渡って１枚の誘電体板２２を配置する構成としているので、バンドパスフィルタの構造を簡素化することができる。 In the band-pass filter 2 according to the present embodiment, the plurality of resonators 11_1 to 11_3 extend in the direction in which the resonators 11_1 to 11_3 are arranged (that is, the longitudinal direction of the housing 10), and are disposed adjacent to the plurality of resonators 11_1 to 11_3. The pass band of the band-pass filter 2 is changed by displacing the dielectric plate 22 thus formed. That is, in the band-pass filter 2 according to the present embodiment, since one dielectric plate 22 is arranged across the plurality of resonators 11_1 to 11_3, the structure of the band-pass filter can be simplified. it can.
　以上で説明した本実施の形態にかかる発明により、通過帯域を変更可能なバンドパスフィルタにおいて、バンドパスフィルタの構造を簡素化することができる。 With the invention according to the present embodiment described above, the bandpass filter structure can be simplified in the bandpass filter that can change the passband.
＜実施の形態３＞
　次に、本発明の実施の形態３について説明する。
　図８～図１０はそれぞれ、実施の形態３にかかるバンドパスフィルタ３を示す斜視図、上面図、及び正面図である。図１１は、図８の切断線ＸＩ－ＸＩにおける断面図である。図８～図１１に示すように、本実施の形態にかかるバンドパスフィルタ３は、筐体３０の内部に３つの共振体３１_１～３１_３を備える３段の空胴共振器で構成されたバンドパスフィルタである。なお、以下では３段のバンドパスフィルタを一例として説明するが、本実施の形態にかかるバンドパスフィルタの段数は２段以上であれば何段でもよい。 <Embodiment 3>
Next, a third embodiment of the present invention will be described.
8 to 10 are a perspective view, a top view, and a front view, respectively, showing the bandpass filter 3 according to the third embodiment. FIG. 11 is a cross-sectional view taken along section line XI-XI in FIG. As shown in FIGS. 8 to 11, the bandpass filter 3 according to the present embodiment includes a bandpass formed of a three-stage cavity resonator including three resonators 31_1 to 31_3 inside a housing 30. It is a filter. In the following, a three-stage band-pass filter will be described as an example, but the number of stages of the band-pass filter according to the present embodiment may be any number as long as it is two or more.
　筐体３０は、内部に空胴を有する導電性の部材である。例えば、筐体３０は、共振体３１_１～３１_３等を収納可能な凹部を有する筐体本体と、当該筐体本体の開口部をカバーする蓋体とを用いて構成することができる。 The housing 30 is a conductive member having a cavity inside. For example, the housing 30 can be configured using a housing body having a recess that can accommodate the resonators 31_1 to 31_3 and the like, and a lid that covers the opening of the housing body.
　共振体３１_１～３１_３は、筐体３０の内部に配置されている。各々の共振体３１_１～３１_３の一端は筐体３０の底面に接続（固定）されている。各々の共振体３１_１～３１_３の他端は開放端（つまり、他の部材と接していない）となっている。例えば、共振体３１_１～３１_３は導体または誘電体を用いて構成することができる。本実施の形態にかかるバンドパスフィルタ３では、共振体３１_１～３１_３の形状を板状（つまり、誘電体板３２の側面と対向している側面が主面となっている板状）としている。このように共振体３１_１～３１_３の形状を板状とすることで、誘電体板３２と対向する面の面積を増やすことができ、周波数可変量を増やすことができる（特に、図１１参照）。 The resonators 31_1 to 31_3 are disposed inside the housing 30. One end of each of the resonators 31_1 to 31_3 is connected (fixed) to the bottom surface of the housing 30. The other ends of the resonators 31_1 to 31_3 are open ends (that is, not in contact with other members). For example, the resonators 31_1 to 31_3 can be configured using a conductor or a dielectric. In the bandpass filter 3 according to the present embodiment, the resonators 31_1 to 31_3 have a plate shape (that is, a plate shape in which the side surface facing the side surface of the dielectric plate 32 is the main surface). Thus, by making the shapes of the resonators 31_1 to 31_3 into a plate shape, the area of the surface facing the dielectric plate 32 can be increased, and the frequency variable amount can be increased (particularly, refer to FIG. 11).
　なお、本実施の形態においても、共振体３１_１～３１_３の形状は円柱状としてもよく、また、図４に示すような円柱を半分に切断した形状１７や図５に示すような直方体状１８（立方体を含む）としてもよい。図４に示すような円柱を半分に切断した形状１７とした場合は、形状１７の切断面が誘電体板３２と対向するように配置することで、誘電体板３２と対向する面の面積を増やすことができる。 Also in the present embodiment, the shapes of the resonators 31_1 to 31_3 may be cylindrical, the shape 17 obtained by cutting the column as shown in FIG. 4 into a half, or a rectangular parallelepiped shape 18 (as shown in FIG. Including a cube). In the case of the shape 17 obtained by cutting the cylinder as shown in FIG. 4 into half, the cut surface of the shape 17 is disposed so as to face the dielectric plate 32, thereby reducing the area of the surface facing the dielectric plate 32. Can be increased.
　各々の共振体３１_１～３１_３の間には、仕切り部３３ａ、３３ｂが配置されている。具体的には、共振体３１_１と共振体３１_２との間には仕切り部３３ａが配置され、共振体３１_２と共振体３１_３との間には仕切り部３３ｂが配置されている。ここで、仕切り部３３ａ、３３ｂは、筐体３０の内部空間の一部を仕切っており、仕切り部３３ａ、３３ｂの一方の側面および上面は筐体３０と接していない。換言すると、各々の共振体３１_１～３１_３は仕切り部３３ａ、３３ｂで仕切られた空胴に設けられており、各々の共振体３１_１～３１_３が設けられている各々の空胴は空間的に連続している。 Partition portions 33a and 33b are arranged between the respective resonators 31_1 to 31_3. Specifically, a partition 33a is disposed between the resonator 31_1 and the resonator 31_2, and a partition 33b is disposed between the resonator 31_2 and the resonator 31_3. Here, the partition portions 33 a and 33 b partition a part of the internal space of the housing 30, and one side surface and upper surface of the partition portions 33 a and 33 b are not in contact with the housing 30. In other words, each of the resonators 31_1 to 31_3 is provided in a cavity partitioned by the partition portions 33a and 33b, and each cavity in which each of the resonators 31_1 to 31_3 is provided is spatially continuous. ing.
　なお、本実施の形態にかかるバンドパスフィルタ３では、必ずしも仕切り部３３ａ、３３ｂを設ける必要はなく、適宜、省略してもよい。また、本実施の形態にかかるバンドパスフィルタ３では、筐体３０と仕切り部３３ａ、３３ｂとを一体で形成してもよい。つまり、筐体３０を形成する際に、仕切り部３３ａ、３３ｂが同時に形成されるようにしてもよい。 In addition, in the band pass filter 3 concerning this Embodiment, it is not necessary to necessarily provide the partition parts 33a and 33b, and may be abbreviate | omitted suitably. Moreover, in the band pass filter 3 according to the present embodiment, the housing 30 and the partition portions 33a and 33b may be integrally formed. That is, when forming the housing | casing 30, you may make it form the partition parts 33a and 33b simultaneously.
　線路３４ａ、３４ｂおよび導電性の部材３５ａ、３５ｂは同軸線路を構成している。図８では線路３４ａ、３４ｂは矩形断面形状を有しているが、線路３４ａ、３４ｂの形状は任意の形状とすることができる。また、線路３４ａは筐体３０の内部においてＬ字状に屈曲しており、先端部が筐体３０の側面に接続されている（図９参照）。このとき、線路３４ａの一部は、誘電体板３２の主面と対向するように配置される（図１０参照）。同様に、筐体３０の他端には線路（第２の線路）３４ｂが配置されている。線路３４ｂは、筐体３０の外部において被覆部（絶縁材料）３５ｂによって被覆されている。また、線路３４ｂは筐体３０の内部においてＬ字状に屈曲しており、先端部が筐体３０の側面に接続されている（図９参照）。このとき、線路３４ｂの一部は、誘電体板３２の主面と対向するように配置される（図１０参照）。 The lines 34a and 34b and the conductive members 35a and 35b constitute a coaxial line. In FIG. 8, the lines 34a and 34b have a rectangular cross-sectional shape, but the lines 34a and 34b may have any shape. Moreover, the track | line 34a is bent in the L shape inside the housing | casing 30, and the front-end | tip part is connected to the side surface of the housing | casing 30 (refer FIG. 9). At this time, a part of the line 34a is disposed so as to face the main surface of the dielectric plate 32 (see FIG. 10). Similarly, a line (second line) 34 b is disposed at the other end of the housing 30. The line 34 b is covered with a covering portion (insulating material) 35 b outside the housing 30. Moreover, the track | line 34b is bent in the L shape inside the housing | casing 30, and the front-end | tip part is connected to the side surface of the housing | casing 30 (refer FIG. 9). At this time, a part of the line 34b is disposed so as to face the main surface of the dielectric plate 32 (see FIG. 10).
　このように、線路３４ａ、３４ｂの一部が誘電体板３２の主面と対向するように配置することで、誘電体板３２を変位させてバンドパスフィルタ３の周波数を変更した際に、入出力の線路３４ａ、３４ｂと初段の共振器との外部Ｑ値を一定に保つことができる。よって、帯域幅を一定に保ちながら可変できる周波数範囲を拡大することができる。 Thus, when the frequency of the bandpass filter 3 is changed by displacing the dielectric plate 32 by arranging a part of the lines 34a and 34b so as to face the main surface of the dielectric plate 32, the input line The external Q values of the output lines 34a and 34b and the first stage resonator can be kept constant. Therefore, the frequency range that can be varied while keeping the bandwidth constant can be expanded.
　誘電体板３２は、複数の共振体３１_１～３１_３が並んでいる方向（つまり、筐体３０の長手方向）に延び、複数の共振体３１_１～３１_３と隣接し、複数の共振体３１_１～３１_３に対する相対的な位置を変更可能に配置されている。例えば、誘電体板３２はアルミナを用いて構成することができる。図８～図１１に示すバンドパスフィルタ３では、誘電体板３２は共振体３１_１～３１_３の側面側に配置されている。つまり、誘電体板３２は、当該誘電体板３２の側面が複数の共振体３１_１～３１_３の側面と対向するように配置されている（特に、図１１参照）。そして、誘電体板３２の主面と垂直な方向（図１０の矢印方向）に誘電体板３２を移動することで、筐体３０の内部における電磁界分布に影響を与えることができる。これにより、バンドパスフィルタ３の通過帯域を変更することができる。 The dielectric plate 32 extends in the direction in which the plurality of resonators 31_1 to 31_3 are arranged (that is, the longitudinal direction of the housing 30), is adjacent to the plurality of resonators 31_1 to 31_3, and is connected to the plurality of resonators 31_1 to 31_3. The relative position can be changed. For example, the dielectric plate 32 can be configured using alumina. In the bandpass filter 3 shown in FIGS. 8 to 11, the dielectric plate 32 is disposed on the side surface side of the resonators 31_1 to 31_3. That is, the dielectric plate 32 is disposed so that the side surface of the dielectric plate 32 faces the side surfaces of the plurality of resonators 31_1 to 31_3 (see particularly FIG. 11). Then, by moving the dielectric plate 32 in a direction perpendicular to the main surface of the dielectric plate 32 (in the direction of the arrow in FIG. 10), the electromagnetic field distribution inside the housing 30 can be affected. Thereby, the pass band of the band pass filter 3 can be changed.
　例えば、電界が集中している共振体３１_１～３１_３の開放端に誘電体板３２が近づくほど（誘電体板３２が上方に移動するほど）、バンドパスフィルタ３の通過帯域の共振周波数が低下する。逆に、電界が集中している共振体３１_１～３１_３の開放端から誘電体板３２が遠ざかるほど（誘電体板３２が下方に移動するほど）、バンドパスフィルタ３の通過帯域の共振周波数が高くなる。 For example, the closer the dielectric plate 32 is to the open ends of the resonators 31_1 to 31_3 where the electric field is concentrated (the more the dielectric plate 32 moves upward), the lower the resonance frequency in the pass band of the bandpass filter 3 is. . Conversely, the farther away the dielectric plate 32 is from the open ends of the resonators 31_1 to 31_3 where the electric field is concentrated (the more the dielectric plate 32 moves downward), the higher the resonance frequency of the pass band of the bandpass filter 3 becomes. Become.
　このとき、誘電体板３２に切り欠き部３７ａ、３７ｂを形成することで、バンドパスフィルタ３の共振周波数が変化した際の帯域幅の変化量を少なくすることができる。つまり、バンドパスフィルタ３の共振周波数を変化させた際の各々の共振体３１_１～３１_３の間の結合変化を、誘電体板３２の切り欠き量を調整して最適化することで、バンドパスフィルタ３の帯域幅を一定に保つことができる。 At this time, by forming the notches 37a and 37b in the dielectric plate 32, the amount of change in bandwidth when the resonance frequency of the bandpass filter 3 changes can be reduced. In other words, the coupling change between the resonators 31_1 to 31_3 when the resonance frequency of the bandpass filter 3 is changed is optimized by adjusting the notch amount of the dielectric plate 32. The bandwidth of 3 can be kept constant.
　例えば、切り欠き部３７ａ、３７ｂは、各々の共振体３１_１～３１_３の間に対応する位置に形成する（特に図１１参照）。また、図１３に示す誘電体板３２’のように、各々の共振体３１_１～３１_３の間に対応する位置に貫通孔５２ａ、５２ｂを形成してもよい。図１３に示すように、貫通孔５２ａ、５２ｂの断面形状を四角形としてもよく、また、図１４に示す誘電体板３２’’のように貫通孔５６ａ、５６ｂの断面形状を円形としてもよい。 For example, the notches 37a and 37b are formed at corresponding positions between the respective resonators 31_1 to 31_3 (see particularly FIG. 11). Further, as in the dielectric plate 32 'shown in FIG. 13, through holes 52a and 52b may be formed at positions corresponding to the respective resonators 31_1 to 31_3. As shown in FIG. 13, the cross-sectional shapes of the through holes 52a and 52b may be quadrangular, and the cross-sectional shapes of the through holes 56a and 56b may be circular as in the dielectric plate 32 ″ shown in FIG.
　なお、誘電体板３２に切り欠き部３７ａ、３７ｂを設けない場合は、バンドパスフィルタ３の共振周波数が下がると帯域幅が狭くなり、また共振周波数が上がると帯域幅が広くなる。 In the case where the notches 37a and 37b are not provided in the dielectric plate 32, the bandwidth is narrowed when the resonance frequency of the bandpass filter 3 is lowered, and the bandwidth is widened when the resonance frequency is raised.
　例えば、誘電体板３２に支持棒３６ａ、３６ｂを取り付け、この支持棒３６ａ、３６ｂをバンドパスフィルタ３の外に設けられたステッピングモータ（不図示）を用いて変位させることで、誘電体板３２を移動させることができる。 For example, the support rods 36 a and 36 b are attached to the dielectric plate 32, and the support rods 36 a and 36 b are displaced using a stepping motor (not shown) provided outside the bandpass filter 3, thereby allowing the dielectric plate 32 to move. Can be moved.
　図１２は、バンドパスフィルタのフィルタ特性（シミュレーション結果）を示すグラフである。図１２に示すように、本実施の形態にかかるバンドパスフィルタ３では、バンドパスフィルタの共振周波数を約７００ＭＨｚ程度可変にすることができる。 FIG. 12 is a graph showing the filter characteristics (simulation results) of the bandpass filter. As shown in FIG. 12, in the bandpass filter 3 according to the present embodiment, the resonance frequency of the bandpass filter can be made variable by about 700 MHz.
　本実施の形態にかかるバンドパスフィルタ３では、複数の共振体３１_１～３１_３が並んでいる方向（つまり、筐体３０の長手方向）に延び、複数の共振体３１_１～３１_３と隣接するように配置された誘電体板３２を変位させることで、バンドパスフィルタ３の通過帯域を変更している。つまり、本実施の形態にかかるバンドパスフィルタ３では、複数の共振体３１_１～３１_３に渡って１枚の誘電体板３２を配置する構成としているので、バンドパスフィルタの構造を簡素化することができる。 In the band-pass filter 3 according to the present embodiment, the plurality of resonators 31_1 to 31_3 extend in the direction in which the resonators 31_1 to 31_3 are arranged (that is, the longitudinal direction of the housing 30) and are arranged adjacent to the plurality of resonators 31_1 to 31_3. The pass band of the bandpass filter 3 is changed by displacing the dielectric plate 32 that has been moved. That is, in the band-pass filter 3 according to the present embodiment, since one dielectric plate 32 is arranged across the plurality of resonators 31_1 to 31_3, the structure of the band-pass filter can be simplified. it can.
　以上で説明した本実施の形態にかかる発明により、通過帯域を変更可能なバンドパスフィルタにおいて、バンドパスフィルタの構造を簡素化することができる。 With the invention according to the present embodiment described above, the bandpass filter structure can be simplified in the bandpass filter that can change the passband.
　なお、上記で説明した実施の形態１乃至３では、筐体の内部に１枚の誘電体板を配置した場合について説明したが、本発明では、筐体の内部に２枚の誘電体板を配置してもよい。例えば、上記で説明した実施の形態１の構成と実施の形態２の構成とを組み合わせてもよい。つまり、実施の形態１で説明したバンドパスフィルタ１の筐体１０の内部に、誘電体板１２と誘電体板２２（実施の形態２参照）とを配置してもよい。このように筐体の内部に２枚の誘電体板を配置するとバンドパスフィルタの構造が若干複雑になるが、２枚の誘電体板を配置することでバンドパスフィルタの通過帯域を広範囲に調整することができるようになる。 In the first to third embodiments described above, the case where one dielectric plate is disposed inside the housing has been described. However, in the present invention, two dielectric plates are disposed inside the housing. You may arrange. For example, the configuration of the first embodiment described above and the configuration of the second embodiment may be combined. That is, the dielectric plate 12 and the dielectric plate 22 (see the second embodiment) may be disposed inside the housing 10 of the bandpass filter 1 described in the first embodiment. If two dielectric plates are arranged inside the housing in this way, the structure of the bandpass filter is slightly complicated. However, by arranging two dielectric plates, the passband of the bandpass filter can be adjusted over a wide range. Will be able to.
　また、本発明では、実施の形態１、２で説明した構成と実施の形態３で説明した構成とを組み合わせてもよい。例えば、実施の形態１および実施の形態２で説明したバンドパスフィルタ１、２の誘電体板１２、２２に切り欠き部や貫通孔を設けてもよい（図１１、図１３、図１４参照）。 In the present invention, the configuration described in the first and second embodiments and the configuration described in the third embodiment may be combined. For example, notches and through holes may be provided in the dielectric plates 12 and 22 of the bandpass filters 1 and 2 described in the first and second embodiments (see FIGS. 11, 13, and 14). .
　次に、図１５を用いて本発明にかかるバンドパスフィルタを備える無線通信装置について説明する。図１５に示す無線通信装置６０は、送信回路６１、アンテナ６２、受信回路６３、バンドパスフィルタ６４、サーキュレータ６５、及びバンドパスフィルタ６６を備える。バンドパスフィルタ６４、６６には、上記で説明した本発明にかかるバンドパスフィルタ１～３を用いることができる。 Next, a wireless communication apparatus including a bandpass filter according to the present invention will be described with reference to FIG. A wireless communication device 60 illustrated in FIG. 15 includes a transmission circuit 61, an antenna 62, a reception circuit 63, a bandpass filter 64, a circulator 65, and a bandpass filter 66. As the band- pass filters 64 and 66, the band-pass filters 1 to 3 according to the present invention described above can be used.
　送信回路６１は送信信号を生成し、生成した送信信号をバンドパスフィルタ６４に供給する。バンドパスフィルタ６４は、送信信号に含まれる不要な周波数成分を除去し、不要な周波数成分を除去した後の送信信号をサーキュレータ６５に供給する。サーキュレータ６５は、バンドパスフィルタ６４から供給された送信信号をアンテナ６２に出力する。アンテナ６２は、サーキュレータ６５から供給された送信信号を無線送信する。 The transmission circuit 61 generates a transmission signal and supplies the generated transmission signal to the band pass filter 64. The band pass filter 64 removes unnecessary frequency components included in the transmission signal, and supplies the circulator 65 with the transmission signal after removing unnecessary frequency components. The circulator 65 outputs the transmission signal supplied from the bandpass filter 64 to the antenna 62. The antenna 62 wirelessly transmits the transmission signal supplied from the circulator 65.
　また、アンテナ６２で受信した受信信号は、サーキュレータ６５を介してバンドパスフィルタ６６に供給される。バンドパスフィルタ６６は、受信信号に含まれる不要な周波数成分を除去し、不要な周波数成分を除去した後の受信信号を受信回路６３に供給する。受信回路６３は、バンドパスフィルタ６６から供給された受信信号に対して復調処理等の受信処理を実施して、所定の情報を取得する。 The received signal received by the antenna 62 is supplied to the band pass filter 66 via the circulator 65. The band pass filter 66 removes unnecessary frequency components included in the reception signal, and supplies the reception signal after removing unnecessary frequency components to the reception circuit 63. The reception circuit 63 performs reception processing such as demodulation processing on the reception signal supplied from the bandpass filter 66 to obtain predetermined information.
　このとき、バンドパスフィルタ６４、６６に本発明にかかるバンドパスフィルタ１～３を用いることで、無線通信装置６０の構成を簡素化することができる。また、本発明にかかるバンドパスフィルタ１～３を用いることで、複数のバンドパスフィルタが必要な場合であっても１つのバンドパスフィルタを用いて構成することができる。 At this time, by using the band-pass filters 1 to 3 according to the present invention for the band- pass filters 64 and 66, the configuration of the wireless communication device 60 can be simplified. In addition, by using the bandpass filters 1 to 3 according to the present invention, even when a plurality of bandpass filters are required, a single bandpass filter can be used.
　以上、実施の形態を参照して本願発明を説明したが、本願発明は上記によって限定されるものではない。本願発明の構成や詳細には、発明のスコープ内で当業者が理解し得る様々な変更をすることができる。 The present invention has been described above with reference to the embodiment, but the present invention is not limited to the above. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the invention.
　この出願は、２０１４年１１月１０日に出願された日本出願特願２０１４－２２７６７５を基礎とする優先権を主張し、その開示の全てをここに取り込む。 This application claims priority based on Japanese Patent Application No. 2014-227675 filed on November 10, 2014, the entire disclosure of which is incorporated herein.
１、２、３　バンドパスフィルタ
１０　筐体
１１_１～１１_３　共振体
１２　誘電体板
１３ａ、１３ｂ　仕切り部
１４ａ、１４ｂ　端子
１５ａ、１５ｂ　導電性の部材
２２　誘電体板
３０　筐体
３１_１～３１_３　共振体
３２　誘電体板
３３ａ、３３ｂ　仕切り部
３４ａ、３４ｂ　線路
３５ａ、３５ｂ　導電性の部材
３６ａ、３６ｂ　支持棒
３７ａ、３７ｂ　切り欠き部 1, 2, 3 Bandpass filter 10 Housing 11_1 to 11_3 Resonator 12 Dielectric plates 13a and 13b Partition portions 14a and 14b Terminals 15a and 15b Conductive member 22 Dielectric plate 30 Housing 31_1 to 31_3 Resonator 32 Dielectric Body plates 33a, 33b Partitions 34a, 34b Lines 35a, 35b Conductive members 36a, 36b Support rods 37a, 37b Notch

Claims (11)

  1. 　内部に空胴を有する導電性の筐体と、
    　前記筐体の内部に配置され、一端が前記筐体に接続され他端が開放端となっている複数の共振体と、
    　前記複数の共振体が並んでいる方向に延び、前記複数の共振体と隣接するように配置され、前記複数の共振体に対する相対的な位置を変更可能な誘電体板と、を備える、
    　バンドパスフィルタ。     A conductive housing with a cavity inside;
    A plurality of resonators disposed inside the housing, having one end connected to the housing and the other end being an open end;
    A dielectric plate that extends in a direction in which the plurality of resonators are arranged, is disposed adjacent to the plurality of resonators, and is capable of changing a relative position with respect to the plurality of resonators;
    Bandpass filter.
  2. 　前記誘電体板は、当該誘電体板の側面が前記複数の共振体の側面と対向するように配置され、
    　前記誘電体板の主面と垂直な方向に前記誘電体板を移動することで通過帯域を変更する、
    　請求項１に記載のバンドパスフィルタ。     The dielectric plate is disposed such that a side surface of the dielectric plate faces a side surface of the plurality of resonators,
    Changing the passband by moving the dielectric plate in a direction perpendicular to the main surface of the dielectric plate;
    The band-pass filter according to claim 1.
  3. 　前記誘電体板は、当該誘電体板の主面が前記複数の共振体の側面と対向するように配置され、
    　前記誘電体板の主面と前記複数の共振体の側面との距離を変更することで通過帯域を変更する、
    　請求項１に記載のバンドパスフィルタ。     The dielectric plate is disposed such that a main surface of the dielectric plate faces a side surface of the plurality of resonators,
    Changing the passband by changing the distance between the main surface of the dielectric plate and the side surfaces of the plurality of resonators;
    The band-pass filter according to claim 1.
  4. 　前記複数の共振体は円柱状である、請求項１乃至３のいずれか一項に記載のバンドパスフィルタ。 The bandpass filter according to any one of claims 1 to 3, wherein the plurality of resonators are cylindrical.
  5. 　前記複数の共振体は一部が欠けた円柱状または直方体状である、請求項１乃至３のいずれか一項に記載のバンドパスフィルタ。 The band-pass filter according to any one of claims 1 to 3, wherein each of the plurality of resonators has a columnar shape or a rectangular parallelepiped shape with a part missing.
  6. 　前記複数の共振体は、前記誘電体板の側面と対向している前記側面が主面となっている板状である、請求項２に記載のバンドパスフィルタ。 The band-pass filter according to claim 2, wherein the plurality of resonators have a plate shape in which the side surface facing the side surface of the dielectric plate is a main surface.
  7. 　前記筐体の一端に配置された第１の線路と、
    　前記筐体の他端に配置された第２の線路と、を備え、
    　前記第１の線路の一部および前記第２の線路の一部は、前記誘電体板の主面と対向するように配置されている、
    　請求項２または６に記載のバンドパスフィルタ。     A first line disposed at one end of the housing;
    A second line disposed at the other end of the housing,
    A part of the first line and a part of the second line are arranged to face the main surface of the dielectric plate;
    The band pass filter according to claim 2 or 6.
  8. 　前記誘電体板は、前記複数の共振体の間に対応する位置に切り欠き部を有する、請求項１乃至７のいずれか一項に記載のバンドパスフィルタ。 The bandpass filter according to any one of claims 1 to 7, wherein the dielectric plate has a notch at a position corresponding to the plurality of resonators.
  9. 　前記誘電体板は、前記複数の共振体の間に対応する位置に貫通孔を有する、請求項１乃至７のいずれか一項に記載のバンドパスフィルタ。 The bandpass filter according to any one of claims 1 to 7, wherein the dielectric plate has a through hole at a position corresponding to the plurality of resonators.
  10. 　前記複数の共振体の間に仕切り部が配置されている、請求項８または９に記載のバンドパスフィルタ。 The bandpass filter according to claim 8 or 9, wherein a partition portion is disposed between the plurality of resonators.
  11. 　送信信号を生成する送信回路と、
    　前記送信回路から出力された送信信号から不要な周波数成分を除去する第１のバンドパスフィルタと、
    　前記第１のバンドパスフィルタで処理された後の送信信号を送信すると共に、受信信号を受信するアンテナと、
    　前記アンテナで受信した受信信号から不要な周波数成分の信号を除去する第２のバンドパスフィルタと、
    　前記第２のバンドパスフィルタで処理された後の受信信号に対して受信処理を実施する受信回路と、を備え、
    　前記第１および第２のバンドパスフィルタの少なくとも一方は、請求項１乃至１０のいずれか一項に記載のバンドパスフィルタを用いて構成されている、
    　無線通信装置。     A transmission circuit for generating a transmission signal;
    A first bandpass filter for removing unnecessary frequency components from a transmission signal output from the transmission circuit;
    An antenna for transmitting a transmission signal after being processed by the first bandpass filter and receiving a reception signal;
    A second bandpass filter for removing signals of unnecessary frequency components from the received signal received by the antenna;
    A receiving circuit that performs a receiving process on the received signal after being processed by the second bandpass filter,
    At least one of the first and second bandpass filters is configured using the bandpass filter according to any one of claims 1 to 10.
    Wireless communication device.
PCT/JP2015/004409 2014-11-10 2015-08-31 Bandpass filter and wireless communication device WO2016075852A1 (en)

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JP2014227675 2014-11-10

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050212623A1 (en) * 2003-03-18 2005-09-29 Filtronic Comtek Oy Resonator filter
JP2014086839A (en) * 2012-10-23 2014-05-12 Nec Engineering Ltd Tunable band pass filter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050212623A1 (en) * 2003-03-18 2005-09-29 Filtronic Comtek Oy Resonator filter
JP2014086839A (en) * 2012-10-23 2014-05-12 Nec Engineering Ltd Tunable band pass filter

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