EP3001502A1 - Panneau d'utilisation de dispositif d'antenne et dispositif d'antenne - Google Patents

Panneau d'utilisation de dispositif d'antenne et dispositif d'antenne Download PDF

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Publication number
EP3001502A1
EP3001502A1 EP13885195.1A EP13885195A EP3001502A1 EP 3001502 A1 EP3001502 A1 EP 3001502A1 EP 13885195 A EP13885195 A EP 13885195A EP 3001502 A1 EP3001502 A1 EP 3001502A1
Authority
EP
European Patent Office
Prior art keywords
extension portion
antenna
ground plane
connector
distal end
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13885195.1A
Other languages
German (de)
English (en)
Other versions
EP3001502A4 (fr
Inventor
Shinsuke Yukimoto
Ryo Saito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Materials Corp
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Mitsubishi Materials Corp
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Filing date
Publication date
Application filed by Mitsubishi Materials Corp filed Critical Mitsubishi Materials Corp
Publication of EP3001502A1 publication Critical patent/EP3001502A1/fr
Publication of EP3001502A4 publication Critical patent/EP3001502A4/fr
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H01Q5/371—Branching current paths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support

Definitions

  • the present invention relates to an antenna-device substrate and an antenna device which are capable of supporting multiple resonance frequencies.
  • antennas provided with a radiation electrode and a dielectric block or an antenna device using a switch and a controlled voltage source have been proposed for communication devices.
  • Patent Literature 1 which is conventional technology using a dielectric block, a composite antenna in which high efficiency is obtained by forming a radiation electrode on a resin molded body and further integrating a dielectric block using an adhesive is proposed.
  • Patent Literature 2 which is conventional technology using a switch and a controlled voltage source, an antenna device having a first radiation electrode, a second radiation electrode, and a switch interposed between a middle portion of the first radiation electrode and a base end portion of the second radiation electrode and configured to electrically connect or disconnect the second radiation electrode to or from the first radiation electrode is proposed.
  • a dielectric block for exciting the radiation electrode is used and designs of a dielectric block, a radiation electrode pattern, etc. are necessary for each device or antenna performance deteriorates according to design conditions or there is inconvenience in that the number of unstable factors increases.
  • the radiation electrode is formed on a surface of the resin molded body, it is necessary to design a radiation electrode pattern on the resin molded body, an antenna design and a metal mold design are necessary according to a communication device to be mounted or its use, and a significant increase in cost is caused.
  • the dielectric block and the resin molded body are integrated using an adhesive, there is inconvenience in that antenna performance is degraded or the number of unstable factors increases according to an adhesive condition (a thickness of an adhesive, an adhesive area, or the like) other than a Q value of the adhesive.
  • the present invention has been made in view of the aforementioned problems and an objective of the invention is to provide an antenna-device substrate and an antenna device that enable flexible adjustment of multiple resonance frequencies, can inexpensively and simply secure antenna performance according to each use or device, and enable reduction in size or thickness.
  • an antenna-device substrate includes an insulating substrate main body; and first to fourth elements patterned using metal foils on the substrate main body and a ground plane, wherein the first element extends to have a base end on which a power feeding point is provided in the vicinity of the ground plane and have a first connector to which a first passive element is contactable and an antenna element of a dielectric antenna in this order, wherein the second element extends to have a base end connected between the power feeding point of the first element and the first connector and have a second connector to which a second passive element is connectable in the middle, wherein the third element extends to have a base end to which the power feeding point is connected and have a third connector to which a third passive element is connectable in the middle, wherein the fourth element extends to have a base end connected between the power feeding point of the third element and the third connector and have a fourth connector to which a fourth passive element is connectable
  • the substrate can be provided with a multiple resonance (double to quadruple resonance) by effectively employing the stray capacitance between the antenna element of a loading element without self-resonance at a desired resonance frequency and each element.
  • a multiple resonance double to quadruple resonance
  • a design is possible within a plane of the substrate main body and thickness reduction is possible as compared with the case in which the conventional dielectric block or resin-molded body or the like is used and size reduction and high performance are also enabled by selecting the antenna element which is the dielectric antenna.
  • cost according to a metal mold, a design change, or the like is unnecessary and low cost can be implemented.
  • the antenna-device substrate comprises, in the first present invention, a first ground connector having a base end connected to the ground plane and a distal end connected to a base end side of the first element closer than a connection portion of the first element with the second element; a second ground connector having a base end separated from a position at which the first ground connector is connected and connected to the ground plane and a distal end connected to a base end side of the third element closer than a connection portion of the third element with the fourth element; and a connection pattern extending by connecting a distal end side of the first element further than a connection portion of the first element with the first ground connector and a distal end side of the third element further than a connection portion of the third element with the second ground connector, wherein an annular opening pattern portion among the connection pattern, the first element, and the third element is formed in the vicinity of the power feeding point.
  • the annular opening pattern portion among the connection pattern, the first element, and the third element is formed in the vicinity of the power feeding point in the antenna-device substrate, it is possible to reduce a bad influence from a capacitance occurring between peripheral components by a capacitance occurring within the opening pattern portion and implement high performance for each element. That is, the opening pattern portion can effectively make a flow of a high-frequency current from the power feeding point to elements of the side of the first element (including the second element) and the side of the third element (including the fourth element) with good balance. In particular, when a distance from a peripheral component is short due to size reduction or thickness reduction, it is possible to effectively achieve both size reduction and high performance.
  • the antenna-device substrate is characterized in that, in the first or second present invention, the first element includes a first extension portion extending from the power feeding point in one direction along the ground plane, a second extension portion extending from a distal end of the first extension portion away from the ground plane, and a third extension portion extending from a distal end of the second extension portion in a direction along the ground plane via the first connector and to which the antenna element extending in the same direction is connected, the second element includes a fourth extension portion extending from the distal end of the second extension portion in the same direction as that of the second extension portion via the second connector and a fifth extension portion extending from a distal end of the fourth extension portion to a side of the antenna element in a direction along the third extension portion, the third element includes a sixth extension portion extending from the power feeding point in another direction along the ground plane, a seventh extension portion extending from a distal end of the sixth extension portion away from the ground plane via the third connector, and an eighth extension portion extending from
  • the fourth element has the ninth extension portion and the tenth extension portion on the antenna-device substrate, stray capacitance between the first element and the ground plane, stray capacitance between the antenna element and the fifth extension portion, stray capacitance between the third extension portion and the fifth extension portion, stray capacitance between the fifth extension portion and the eighth extension portion, stray capacitance among the first extension portion, the sixth extension portion, and the eighth extension portion, stray capacitance between the seventh extension portion and the ninth extension portion, and stray capacitance between the tenth extension portion and the ground plane can occur and a high degree of freedom of adjustment at each resonance frequency can be obtained.
  • the antenna-device substrate according to a fourth present invention is characterized in that, in the third present invention, a base end side closer than a portion opposite to the antenna element of the fifth extension portion serves as a wide portion formed to be wider than a distal end side.
  • the base end side closer than the portion opposite to the antenna element of the fifth extension portion serves as the wide portion formed to be wider than the distal end side on the antenna-device substrate, it is possible to cause stray capacitance between the fifth extension portion and the third extension portion through the wide portion to effectively occur while securing the wide portion without interference with the antenna element and achieve a broad band and size reduction.
  • the antenna-device substrate according to a fifth present invention is characterized in that, in the third or fourth present invention, the first element includes an eleventh extension portion extending from a distal end of the third extension portion to the ground plane and a twelfth extension portion extending from a distal end of the eleventh extension portion to the first extension portion along the ground plane.
  • the first element has an eleventh extension portion extending from the distal end of the third extension portion to the ground plane and the twelfth extension portion extending from the distal end of the eleventh extension portion to the first extension portion along the ground plane on the antenna-device substrate, it is possible to cause stray capacitance between the twelfth extension portion and the third extension portion and stray capacitance between the twelfth extension portion and the ground plane to occur.
  • the antenna-device substrate according to a sixth present invention is characterized in that, in any one of the third to fifth present inventions, a thirteenth extension portion extending away from the ground plane is connected to a base end side of the tenth extension portion.
  • the thirteenth extension portion extending away from the ground plane is connected to the base end side of the tenth extension portion on the antenna-device substrate, it is possible to cause stray capacitance between the thirteenth extension portion and the seventh extension portion to occur and distribute a high-frequency current away from the ground plane through the thirteenth extension portion.
  • a space between the tenth extension portion and the thirteenth extension portion is empty, it is possible to secure a space or the like for fixing a screw of the substrate main body in the empty space.
  • the antenna-device substrate according to a seventh present invention is characterized in that, in any one of the third to sixth present inventions, the eighth extension portion includes a first rear-surface pattern portion patterned on a rear surface of the substrate main body connected to a front surface side via a through-hole and the first rear-surface pattern portion is widely formed toward the ground plane.
  • the eighth extension portion has the first rear-surface pattern portion patterned on the rear surface of the substrate main body connected to the front surface side via the through-hole and the first rear-surface pattern portion is widely formed toward the ground plane on the antenna-device substrate, it is possible to cause stray capacitance with the fourth extension portion to effectively occur without interfering with the fourth extension portion.
  • impedance is also lower than in the fourth extension portion and an influence of interference can be reduced according to stray capacitance with the first extension portion and the eighth extension portion.
  • the antenna-device substrate according to an eighth present invention is characterized in that, in the sixth present invention, the thirteenth extension portion includes a second rear-surface pattern portion patterned on a rear surface of the substrate main body connected to a front surface side via a through-hole and the second rear-surface pattern portion is widely formed toward the ground plane.
  • the thirteenth extension portion has the second rear-surface pattern portion patterned on the rear surface of the substrate main body connected to the front surface side via the through-hole and the second rear-surface pattern portion is widely formed toward the ground plane on the antenna-device substrate, it is possible to cause stray capacitance with the eighth extension portion or the ground plane by the pattern arrangement with the tenth extension portion to effectively occur.
  • the antenna-device substrate according to a ninth present invention is characterized in that, in the second present invention, a passive element for impedance adjustment is connected to each of the first ground connector and the second ground connector.
  • the passive element for impedance adjustment is connected to each of the first ground connector and the second ground connector on the antenna-device substrate, it is possible to perform impedance adjustment of each frequency band through a setting of the opening pattern portion and settings of two passive elements for impedance adjustment.
  • an antenna device comprises: the antenna-device substrate according to any one of the first to ninth present inventions, wherein the first passive element, the second passive element, the third passive element, and the fourth passive element are connected to the first, second, third, and fourth connectors corresponding thereto.
  • the first passive element, the second passive element, the third passive element, and the fourth passive element are connected to the first, second, third, and fourth connectors corresponding thereto on the antenna device, it is possible to achieve double to quadruple resonance by merely appropriately selecting the first to fourth passive elements and communication at two to four resonance frequencies corresponding to each use or device.
  • an antenna device comprises: the antenna-device substrate according to any one of the first to ninth present inventions, wherein the first passive element is connected to the first connector and wherein any one or two of the second passive element, the third passive element, and the fourth passive element are connected to the second, third, and fourth connectors corresponding thereto.
  • the first passive element is connected to the first connector and any one or two of the second passive element, the third passive element, and the fourth passive element are connected to the second, third, and fourth connectors corresponding thereto on the antenna device, double resonance in two types or triple resonance in three types is possible in a state in which any one or two of the second passive element, the third passive element, and the fourth passive element are not used.
  • the present invention accomplishes the following effects.
  • the first to fourth elements extend with gaps from the adjacent elements and the ground plane so that stray capacitance between adjacent elements and stray capacitance with the ground plane can occur according to the antenna-device substrate and the antenna device having the same according to the present invention, it is possible to perform multiple resonance (double to quadruple resonance). In addition, it is possible to flexibly adjust each resonance frequency and obtain the antenna device in which double to quadruple resonance is possible according to a design condition through selection of the first to fourth passive elements to be connected to the first to fourth connectors and enable size reduction and high performance.
  • the antenna-device substrate and the antenna device having the same according to the present invention can be easily provided with a multiple resonance characteristic corresponding to various uses or devices and save space.
  • the antenna-device substrate 1 in this embodiment includes an insulating substrate main body 2, a first element EL1, a second element EL2, a third element EL3, and a fourth element EL4 patterned by use of metal foils such as copper foils on the substrate main body 2 and a ground plane GND as illustrated in Figs. 1 to 4 .
  • ground plane GND a mounting region of a radio frequency (RF) circuit or the like is provided in the ground plane GND.
  • the ground plane GND is formed in a similar pattern corresponding to a front surface on a rear surface as well as the front surface of the substrate main body 2.
  • the first element EL1 extends to have a base end on which a power feeding point FP is provided in the vicinity of the ground plane GND and have a first connector C1 to which a first passive element P1 is contactable and an antenna element AT of a dielectric antenna in this order in the middle. Also, in this embodiment, as illustrated in Figs. 3 and 4 , the first passive element P1 is mounted on each of two first connectors C1 and two first passive elements P1 are connected in series.
  • the second element EL2 extends to have a base end connected between the power feeding point FP of the first element EL1 and the first connector C1 and have a second connector C2 to which a second passive element P2 is connectable in the middle.
  • the third element EL3 extends to have a base end to which the power feeding point FP is connected and have a third connector C3 to which a third passive element P3 is connectable in the middle. Also, in this embodiment, as illustrated in Figs. 3 and 4 , the third passive element P3 is mounted on each of two third connectors C3 and two third passive elements P3 are connected in series.
  • the fourth element EL4 extends to have a base end connected between the power feeding point FP of the third element EL3 and the third connector C3 and have a fourth connector C4 to which a fourth passive element P4 is connectable in the middle. Also, in this embodiment, as illustrated in Figs. 3 and 4 , the fourth passive element P4 is mounted on each of two fourth connectors C4 and two fourth passive elements P4 are connected in series.
  • the first passive element P1, the third passive element P3, and the fourth passive element P4 are used by combining two passive elements, but two passive elements having the same characteristic may be used or two passive elements having different characteristics may be used. In addition, one passive element or a combination of three or more passive elements may be used instead of a combination of two passive elements.
  • the first element EL1 has a first extension portion E1 extending from the power feeding point FP in one direction along the ground plane GND, a second extension portion E2 extending from a distal end of the first extension portion E1 away from the ground plane GND, and a third extension portion E3 extending from a distal end of the second extension portion E2 in a direction along the ground plane GND via the first connector C1 and to which the antenna element AT extending in the same direction is connected.
  • the direction along the ground plane GND is a direction along an edge side of an opposite ground plane GND.
  • the first extension portion E1 extends away from the ground plane GND after extending from the power feeding point FP in one direction along the ground plane GND, further extends in one direction along the ground plane GND, and extends in one direction along the ground plane GND as a whole while being bent in a crank shape.
  • the first element EL1 has an eleventh extension portion E11 extending from a distal end of the third extension portion E3 toward the ground plane GND and a twelfth extension portion E12 extending from a distal end of the eleventh extension portion E11 toward the first extension portion E1 along the ground plane GND. That is, the distal end side of the first element EL1 is bent by the eleventh extension portion E11 and the twelfth extension portion E12. Also, the eleventh extension portion E11 has a wide rectangular shape.
  • the second element EL2 has a fourth extension portion E4 extending from a distal end of the second extension portion E2 in the same direction as the second extension portion E2 via the second connector C2 and a fifth extension portion E5 extending from a distal end of the fourth extension portion E4 to a side of the antenna element AT in a direction along the third extension portion E3.
  • a base end side closer than a portion opposite to the antenna element AT of the fifth extension portion E5 serves as a wide portion E5a formed to be wider than a distal end side.
  • the third element EL3 has a sixth extension portion E6 extending from the power feeding point FP in another direction along the ground plane GND, a seventh extension portion E7 extending from a distal end of the sixth extension portion E6 away from the ground plane GND via the third connector C3, and an eighth extension portion E8 extending from a distal end of the seventh extension portion E7 toward the fourth extension portion E4 in a direction along the ground plane GND.
  • the sixth extension portion E6 extends away from the ground plane GND after extending from the power feeding point FP in the other direction along the ground plane GND, further extends in the other direction along the ground plane GND, and extends in the other direction along the ground plane GND as a whole while being bent in the crank shape.
  • base end portions (the first extension portion E1 and the sixth extension portion E6) of the first element EL1 and the third element EL3 are extended in opposite direction each other from the power feeding point FP.
  • the eighth extension portion E8 has a first rear-surface pattern portion R1 patterned on a rear surface of the substrate main body 2 connected to a front surface side via a through-hole H, and the first rear-surface pattern portion R1 is widely formed toward the ground plane GND. Also, the first rear-surface pattern portion R1 is connected to the eighth extension portion E8 of the front surface side through the through-hole H on an end portion side of the substrate main body 2.
  • the fourth element EL4 has a ninth extension portion E9 having a distal end connected to the middle of the seventh extension portion E7 and extending with a gap from the seventh extension portion E7 in the same direction and a tenth extension portion E10 extending from a distal end of the ninth extension portion E9 away from the seventh extension portion E7.
  • the thirteenth extension portion E13 extending away from the ground plane GND is connected to a base end side of the tenth extension portion E10.
  • the thirteenth extension portion E13 has a second rear-surface pattern portion R2 patterned on a rear surface of the substrate main body 2 connected to the front surface side via the through-hole H, and the second rear-surface pattern portion R2 is widely formed toward the ground plane GND. Also, the second rear-surface pattern portion R2 is connected to the thirteenth extension portion E13 of the front surface side through the through-hole H on an end portion side of the substrate main body 2.
  • the antenna-device substrate 1 includes a first ground connector G1 having a base end connected to the ground plane GND and a distal end connected to a base end side of the first element EL1 closer than a connection portion of the first element EL1 with the second element EL2; a second ground connector G2 having a base end separated from a position at which the first ground connector G1 is connected and connected to the ground plane GND and a distal end connected to a base end side of the third element EL3 closer than a connection portion of the third element EL3 with the fourth element EL4; and a connection pattern L1 extending by connecting a distal end side of the first element EL1 further than a connection portion of the first element EL1 with the first ground connector G1 and a distal end side of the third element EL3 further than a connection portion of the third element EL3 with the second ground connector G2.
  • an annular opening pattern portion S1 among the connection pattern L1, the first element EL 1, and the third element EL3 is formed in the vicinity of the power feeding point FP. That is, the opening pattern portion S1 having an approximately rectangular shape that extends along the ground plane GND is configured by parts of the first extension portion E1 and the sixth extension portions E6 bent in the crank shape and the connection pattern L1.
  • a fifth passive element P5 which is a passive element for impedance adjustment is connected to the first ground connector G1 and a sixth passive element P6 which is a passive element for impedance adjustment is connected to the second ground connector G2.
  • the ground plane GND and the first element EL1 are directly connected by only the fifth passive element P5 and the fifth passive element P5 itself functions as the first ground connector G1.
  • the ground plane GND and the third element EL3 are directly connected by only the sixth passive element P6, and the sixth passive element P6 itself functions as the second ground connector G2.
  • the substrate main body 2 is a general printed circuit board.
  • a main body of the printed circuit board formed of a rectangular glass epoxy resin or the like is adopted.
  • dimensions of the substrate main body 2 of this embodiment are a longitudinal direction: 110 mm, a lateral direction: 52 mm, and a thickness: 1.0 mm.
  • dimensions of the antenna region (including a part of the ground plane GND below the fourth element EL4) on the substrate main body 2 are a longitudinal direction of the substrate main body 2: 11 mm and a lateral direction of the substrate main body 2: 35 mm.
  • the power feeding point FP is connected to the power feeding point of a high-frequency circuit (not illustrated) via a power feeding means such as a coaxial cable.
  • a power feeding means such as a coaxial cable.
  • various structures such as a coaxial cable, a connector such as a receptacle, a connection structure having a contact point of a plate spring shape, a connection structure having a contact point of a pin probe shape or a pin shape, a connection structure using a soldering land, etc. can be adopted.
  • a ground line of the coaxial cable is connected to a base end side of the ground plane GND and a core wire of the coaxial cable is connected to the power feeding point FP.
  • the antenna element AT is a loading element without self-resonance at a desired resonance frequency, and, for example, is a chip antenna in which a conductor pattern 102 is formed, for example, of Ag, on the surface of a dielectric block 101 such as a ceramic as illustrated in Fig. 5 .
  • a dielectric block 101 such as a ceramic as illustrated in Fig. 5 .
  • elements different in a length, a width, a conductor pattern 102, etc. thereof may be selected or the same element may be selected.
  • the dimensions of the antenna element AT of this embodiment are a width: 10.5 mm, a depth: 3.0 mm, and a height: 0.8 mm.
  • inductors, condensers, or resistors are adopted for the first passive element P1 to the sixth passive element P6.
  • the elements from the first element EL1 to the fourth element EL4 extend with gaps from the adjacent elements and the ground plane GND so that stray capacitance between adjacent elements and stray capacitance with the ground plane GND can occur.
  • a capacitance Cd is also generated by the
  • the antenna device 10 of this embodiment includes the antenna-device substrate 1, and the first passive element P1, the second passive element P2, the third passive element P3, and the fourth passive element P4 are connected to the first connector C1, the second connector C2, the third connector C3, and the fourth connector C4 corresponding thereto, respectively.
  • the antenna device 10 of this embodiment has multiple resonance frequencies at four frequencies, i.e., a first resonance frequency f1, a second resonance frequency f2, a third resonance frequency f3, and a fourth resonance frequency f4.
  • the first resonance frequency f1 is that of a low frequency band (for example, a 920 MHz band) among the four resonance frequencies, and is determined by the antenna element AT and a length of the first element EL1 (the first extension portion E1, the second extension portion E2, the eleventh extension portion E11, and the twelfth extension portion E12).
  • the bandwidth widening of the first resonance frequency f1 is determined by lengths and widths of the twelfth extension portion E12, the eleventh extension portion E11, and the third extension portion E3.
  • impedance at the first resonance frequency f1 is determined by the stray capacitances Ca to Cd.
  • the final adjustment of the first resonance frequency f1 can be flexibly adjusted using the first passive element P1.
  • the first resonance frequency f1 is mainly adjusted by a part surrounded by a broken line A1 in Fig. 2 .
  • the resonance frequency, the bandwidth, and the impedance can be flexibly adjusted according to settings of the length and width of the first element EL1, the first passive element P1, the antenna element AT, and each stray capacitance described above.
  • the third resonance frequency f3 is determined by lengths of the first extension portion E1, the second extension portion E2, the fourth extension portion E4, and the fifth extension portion E5.
  • the bandwidth widening of the third resonance frequency f3 is determined by lengths and widths of the first extension portion E1, the second extension portion E2, the fourth extension portion E4, and the fifth extension portion E5.
  • the impedance at the third resonance frequency f3 is determined by the stray capacitances Cd, Cc, Cf, and Cg.
  • the final adjustment of the third resonance frequency f3 can be flexibly adjusted using the second passive element P2.
  • the third resonance frequency f3 is mainly adjusted by a part surrounded by a dash-dot line A3 in Fig. 2 .
  • the resonance frequency, the bandwidth, and the impedance can be flexibly adjusted according to settings of the length and width of the first extension portion E1, the second extension portion E2, and the second element EL2, the second passive element P2, and each stray capacitance described above.
  • the fourth resonance frequency f4 is determined by lengths of the eighth extension portion E8 and the seventh extension portion E7.
  • the bandwidth widening of the fourth resonance frequency f4 is determined by lengths and widths of the eighth extension portion E8 and the seventh extension portion E7.
  • the impedance at the fourth resonance frequency f4 is determined by the stray capacitances Cd, Cg, Ch, and Ci.
  • the final adjustment of the fourth resonance frequency f4 can be flexibly adjusted using the third passive element P3.
  • the fourth resonance frequency f4 is mainly adjusted by a part surrounded by a dash-double-dot line A4 in Fig. 2 .
  • the resonance frequency, the bandwidth, and the impedance can be flexibly adjusted according to settings of the length and width of the third element EL3 (the seventh extension portion E7 and the eighth extension portion E8), the third passive element P3, and each stray capacitance described above.
  • the second resonance frequency f2 is determined by lengths of the seventh extension portion E7, the thirteenth extension portion E13, the tenth extension portion E10, and the ninth extension portion E9.
  • the bandwidth widening of the second resonance frequency f2 is determined by lengths and widths of the seventh extension portion E7, the thirteenth extension portion E13, the tenth extension portion E10, and the ninth extension portion E9.
  • the impedance at the second resonance frequency f2 is determined by the stray capacitances Cd, Ci, Cj, and Ck.
  • the final adjustment of the second resonance frequency f2 can be flexibly adjusted using the fourth passive element P4.
  • the second resonance frequency f2 is mainly adjusted by a part surrounded by a broken line A2 in Fig. 2 .
  • the resonance frequency, the bandwidth, and the impedance can be flexibly adjusted according to settings of lengths and widths of the seventh extension portion E7, the thirteenth extension portion E13, the tenth extension portion E10, and the ninth extension portion E9, the fourth passive element P4, and each stray capacitance described above.
  • the opening pattern portion S1 is provided in the vicinity of the power feeding point FP in this embodiment, and a high-frequency current can effectively flow from the power feeding point FP to the left and right elements according to the opening pattern portion S1.
  • the stray capacitance occurs in the fourth extension portion E4 when the first rear-surface pattern portion R1 is designed, the stray capacitance is not effectively used according to a thickness of the substrate main body 2 in an extension direction of the fourth extension portion E4 and the fourth extension portion E4 may be interfered with.
  • impedance in any direction toward the opening pattern portion S1 is lower than that of the fourth extension portion E4 and an influence of interference is small according to a capacitance of the side of the opening pattern portion S1.
  • a design in which a width corresponding to the eighth extension portion E8 is set as a maximum width and the first rear-surface pattern portion R1 extends from an end portion side of the substrate main body 2 in an extension direction of the fourth extension portion E4 is effective.
  • stray capacitance with the eighth extension portion E8 or the ground plane GND by the pattern arrangement with the tenth extension portion E10 occurs for the thirteenth extension portion E13.
  • a design in which a width corresponding to the thirteenth extension portion E13 is set as a maximum width and the second rear-surface pattern portion R2 extends from an end portion side of the substrate main body 2 in a direction toward the tenth extension portion E10 is effective.
  • the thirteenth extension portion E13 is combined with the tenth extension portion E10 and has an orthogonal pattern arrangement.
  • this thirteen extension portion E13 is patterned in only the horizontal direction (the extension direction of the tenth extension portion E10), a degree of freedom of the design is low because it is necessary to design the stray capacitance with the eighth extension portion E8 in consideration of the stray capacitance with the ground plane GND. Thus, further size reduction is difficult.
  • the ground plane GND can be disposed up to the vicinity of the tenth extension portion E10 and other parts (a button/switch, a microphone, a flexible printed circuit (FPC), etc.) for use in the device can be mounted, leading to size reduction of the device.
  • the fifth extension portion E5 has a pattern arrangement using stray capacitance with the antenna element AT, but it is necessary to reduce an antenna region when the entire size reduction is considered and the arrangements of the fifth extension portion E5 and the antenna element AT are important.
  • the wide portion E5a it is preferable to designate the wide portion E5a by widening a pattern width of the side of the fifth extension portion E5 of a part in which stray capacitance Cf between the third extension portion E3 and the fifth extension portion E5 occurs and form an efficient pattern arrangement.
  • the wide portion E5a has a chamfered shape (a triangular shape or a trapezoidal shape) rather than a square shape in consideration of an influence of the stray capacitance Cc between the antenna element AT and the fifth extension portion E5, so that it is possible to control a high-frequency current flowing through the fifth extension portion E5 while effectively using the stray capacitance.
  • the substrate 1 can be provided with a multiple resonance (double to quadruple resonance) by effectively employing the stray capacitance between the antenna element AT of a loading element without self-resonance at a desired resonance frequency and each element.
  • each resonance frequency it is possible to flexibly adjust each resonance frequency and obtain the antenna device 10 in which double to quadruple resonance is possible according to design conditions through selection (a constant change or the like) of the antenna element AT and the first to fourth passive elements P1 to P4 to be connected to the first to fourth connectors C1 to C4.
  • the replacement of the resonance frequency is possible and an adjustment position based on a passive element or the like can change according to the use or device.
  • a design is possible within a plane of the substrate main body 2 and thickness reduction is possible as compared with the case in which the conventional dielectric block or resin molded body or the like is used and size reduction and high performance are also enabled by selecting the antenna element AT which is the dielectric antenna.
  • cost according to a mold, a design change, or the like is unnecessary and low cost can be implemented.
  • the annular opening pattern portion S1 among the connection pattern L1, the first element EL1, and the third element EL3 is formed in the vicinity of the power feeding point FP, it is possible to reduce a bad influence from a capacitance occurring between peripheral components by the capacitance Cd occurring within the opening pattern portion S1 and implement high performance for each element.
  • a base end side closer than a portion opposite to the antenna element AT of the fifth extension portion E5 serves as the wide portion E5a formed to be wider than a distal end side, it is possible to cause stray capacitance between the fifth extension portion E5 and the third extension portion E3 to effectively occur through the wide portion E5a while securing the wide portion E5a without interference with the antenna element AT and achieve a broad band and size reduction.
  • the thirteenth extension portion E13 extending away from the ground plane GND is connected to the base end side of the tenth extension portion E10, it is possible to cause stray capacitance Ci between the thirteenth extension portion E13 and the seventh extension portion E7 to occur and distribute a high-frequency current away from the ground plane GND through the thirteenth extension portion E13.
  • a space between the tenth extension portion E10 and the thirteenth extension portion E13 is empty, it is possible to secure a space or the like for fixing a screw of the substrate main body 2 in the empty space.
  • the eighth extension portion E8 has the first rear-surface pattern portion R1 connected to the front surface side via the through-hole H and patterned on a rear surface of the substrate main body 2, and the first rear-surface pattern portion R1 is widely formed toward the ground plane GND, it is possible to cause stray capacitance with the fourth extension portion E4 to effectively occur without interfering with the fourth extension portion E4.
  • the first rear-surface pattern portion R1 is widely formed toward the ground plane GND, impedance is also lower than with the fourth extension portion E4 and an influence of interference can also be reduced according to the stray capacitance Ch with the opening pattern portion S1 (the first extension portion E1 and the eighth extension portion E8).
  • the thirteenth extension portion E13 has the second rear-surface pattern portion R2 connected to the front surface side via the through-hole H and patterned on the rear surface of the substrate main body 2, and the second rear-surface pattern portion R2 is widely formed toward the ground plane GND, it is possible to cause stray capacitance with the eighth extension portion E8 or stray capacitance with the ground plane GND by the pattern arrangement with the tenth extension portion E10 to effectively occur. Therefore, it is possible to further achieve both high performance and size reduction of an antenna without widening an antenna occupancy area by adopting the first rear-surface pattern portion R1 or the second rear-surface pattern portion R2.
  • passive elements (the fifth passive element P5 and the sixth passive element P6) for impedance adjustment are connected to the first ground connector G1 and the second ground connector G2 respectively, it is possible to perform impedance adjustment of each frequency band through a setting of the opening pattern portion S1 and settings of two passive elements for impedance adjustment.
  • the first passive element P1, the second passive element P2, the third passive element P3, and the fourth passive element P4 are connected to the first connector C1, the second connector C2, the third connector C3, and the fourth connector C4 corresponding thereto in the antenna device 10 of this embodiment, it is possible to achieve double to quadruple resonances by merely appropriately selecting the first to fourth passive elements P1 to P4 and communication at two to four resonance frequencies corresponding to each use or device.
  • two first passive elements P1 an inductor of 3.3 nH and an inductor of 10 nH (an inductor of 13 nH in total)
  • a second passive element P2 8.2 nH
  • a third passive element P3 an inductor of 4.7 nH and an inductor of 5.6 nH (an inductor of 10 nH in total)
  • two fourth passive elements P4 an inductor of 5.6 nH and an inductor of 12 nH (an inductor of 18 nH in total) were used.
  • a condenser of 0.5 pF was used as the fifth passive element P5 and an inductor of 8.2 nH was used as the sixth passive element P6.
  • a direction toward the ground plane GND in which the second extension portion E2 extended was designated as an X direction
  • a direction opposite to the extension direction of the third extension portion E3 was designated as a Y direction
  • a direction perpendicular to the front surface of the substrate main body 2 was designated as a Z direction.
  • an antenna element is provided in the first element, but the antenna element may also be provided in another element.
  • the antenna element may be connected to the fifth extension portion, the eighth extension portion, the thirteenth extension portion, and the tenth extension portion.
  • a maximum of quadruple resonance is implemented in the present invention, but it is possible to cope with double or triple resonance according to presence and absence of each passive element for frequency bands other than a lowest frequency band using the antenna element.

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EP13885195.1A 2013-05-20 2013-05-20 Panneau d'utilisation de dispositif d'antenne et dispositif d'antenne Withdrawn EP3001502A4 (fr)

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PCT/JP2013/003195 WO2014188467A1 (fr) 2013-05-20 2013-05-20 Panneau d'utilisation de dispositif d'antenne et dispositif d'antenne

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EP3001502A4 EP3001502A4 (fr) 2017-01-18

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EP (1) EP3001502A4 (fr)
KR (1) KR101992517B1 (fr)
CN (1) CN105164856B (fr)
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KR20060119914A (ko) * 2003-09-01 2006-11-24 마츠시타 덴끼 산교 가부시키가이샤 안테나 모듈
ATE534165T1 (de) * 2006-07-13 2011-12-15 Murata Manufacturing Co Drahtlose kommunikationsvorrichtung
JP2010081000A (ja) 2008-09-24 2010-04-08 Murata Mfg Co Ltd 複合アンテナ
JP5187515B2 (ja) * 2008-10-24 2013-04-24 株式会社村田製作所 アンテナ装置及び無線通信機
JP5131481B2 (ja) 2009-01-15 2013-01-30 株式会社村田製作所 アンテナ装置及び無線通信機
JP5656108B2 (ja) * 2010-10-15 2015-01-21 三菱マテリアル株式会社 アンテナ装置用基板およびアンテナ装置
JP5645121B2 (ja) * 2010-12-28 2014-12-24 三菱マテリアル株式会社 アンテナ装置用基板およびアンテナ装置

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CN105164856B (zh) 2017-12-15
CN105164856A (zh) 2015-12-16
EP3001502A4 (fr) 2017-01-18
KR20160009568A (ko) 2016-01-26
HK1216565A1 (zh) 2016-11-18
KR101992517B1 (ko) 2019-06-24
WO2014188467A1 (fr) 2014-11-27

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