WO2012090415A1 - アンテナ装置用基板およびアンテナ装置 - Google Patents
アンテナ装置用基板およびアンテナ装置 Download PDFInfo
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- WO2012090415A1 WO2012090415A1 PCT/JP2011/007020 JP2011007020W WO2012090415A1 WO 2012090415 A1 WO2012090415 A1 WO 2012090415A1 JP 2011007020 W JP2011007020 W JP 2011007020W WO 2012090415 A1 WO2012090415 A1 WO 2012090415A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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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
- H01Q5/10—Resonant antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
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- 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
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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
- H01Q5/314—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
- H01Q5/328—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 between a radiating element and ground
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
- H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
Definitions
- the present invention relates to a substrate for an antenna device capable of making a plurality of resonances and an antenna device including the same.
- Patent Document 1 proposes a composite antenna that achieves high efficiency by forming a radiation electrode on a resin molded body and further integrating the dielectric block with an adhesive.
- Patent Document 2 a first radiation electrode, a second radiation electrode, a middle portion of the first radiation electrode, and a base of the second radiation electrode are disclosed.
- An antenna device has been proposed that includes a switch that is interposed between the end portion and electrically connects or disconnects the second radiation electrode with the first radiation electrode.
- the antenna performance may be degraded or unstable depending on the adhesive conditions (adhesive thickness, adhesive area, etc.) in addition to the adhesive Q value.
- the number of elements increases.
- a configuration of a control voltage source, a reactance circuit, and the like are required to switch the resonance frequency with the switch.
- each device is complicated, there is no degree of freedom in design, and easy antenna adjustment is difficult.
- An object of the present invention is to provide a substrate for an antenna device and an antenna device that can be reduced in thickness.
- the substrate for an antenna device includes an insulating substrate body, and a first element, a second element, a third element, a ground plane, and a ground connection pattern, each of which is patterned with a metal foil on the substrate body.
- the first element has a feeding point at the base end, and a first connecting part to which the feeding-side passive element and the first passive element can be connected in the middle part and an antenna element of the dielectric antenna.
- the second element is extended in this order, and the second element is connected to the second passive element via the second connection part that can be connected between the power supply side passive element of the first element and the first connection part.
- a base end is connected and extends, and the third element is connected via a third connection portion to which a third passive element can be connected between the feeding-side passive element of the first element and the first connection portion.
- the base end is connected
- the ground connection pattern is connected to the ground plane and connected to the base end side of the connection portion of the second element and the third element of the first element via a ground-side passive element;
- the first element can generate a stray capacitance between the second element, a stray capacitance between the third element, and a stray capacitance between the ground plane, the second element,
- the first element, the second element, and the third element extend from the surface of the substrate main body to the back surface through a through hole.
- a pattern is formed. *
- the first element can generate the stray capacitance between the second element, the stray capacitance between the third element, and the stray capacitance between the ground plane and the second element.
- the antenna element of the loading element that does not self-resonate at a desired resonance frequency and the stray capacitance between each element are effectively used because it extends with an interval from the element, the third element, and the ground plane.
- double resonance two resonances, three resonances
- Each resonance frequency can be flexibly adjusted by selecting the antenna element and the first to third passive elements connected to the first to third connection parts (changing constants, etc.), and two resonances can be achieved according to the design conditions.
- an antenna device capable of three resonances can be obtained.
- each resonance frequency can be flexibly adjusted with a single antenna device board in the antenna configuration, so that the resonance frequency can be switched, and the adjustment location by passive elements etc. can be changed according to the application and equipment It has become.
- the bandwidth can be adjusted by setting the length and width of each element and each stray capacitance.
- it can be designed in the plane of the substrate body, and can be made thinner than when using a conventional dielectric block or resin molded body, and also by selecting an antenna element that is a dielectric antenna. , Downsizing and high performance are possible. Further, there is no need for costs due to molds, design changes, etc., and low costs can be realized.
- the design of the element having the pattern formed on the back surface also makes it possible to achieve both high performance and miniaturization of the antenna without increasing the area occupied by the antenna.
- a substrate for an antenna device wherein the first element has a surface linear portion patterned on the surface of the substrate body on the tip side of the antenna element and the surface.
- a tip loop portion formed in a loop shape with a back surface linear portion patterned on the back surface of the substrate body in a state of being connected to the linear portion via a through hole and folded back with respect to the front surface linear portion. It is characterized by that.
- the surface linear portion patterned on the surface of the substrate body and the surface linear portion are connected to the surface linear portion on the front end side from the antenna element through the through hole. Since it has a tip loop part formed in a loop shape with a back surface linear part patterned on the back side of the substrate body in the folded state, the impedance is lowered compared to the case where the tip is an open end. In addition, it is possible to increase the bandwidth by providing the folded portion.
- the back side as well as the back side are used to form a loop, allowing pattern formation with a high degree of design freedom without interfering with other elements on the front side, and radiation from the back side. Thus, a high gain can be achieved.
- the antenna device substrate wherein the first element extends from the feeding point in a direction away from the ground surface, and the first extension.
- a second extending portion extending in a direction along the ground surface from the distal end of the portion, and a base end shifted in a direction away from the ground surface from the distal end of the second extending portion via the first connection portion
- the substrate body has a fifth extending portion extending from the distal end of the fourth extending portion along the ground surface toward the first extending portion, and a base end of the fourth extending portion is the fifth extending portion.
- the tip of the fourth extension Connected to the tip of the extension by a through hole, the tip of the fourth extension A sixth extending portion connected to the end by a through hole is provided on the back surface of the substrate body, and the second element extends from the tip of the second extending portion in the same direction as the second extending portion. And the third element extends in a direction along the ground surface from a base end shifted in a direction away from the ground surface from the distal end of the first extending portion via the fourth connecting portion. It is characterized by. *
- the second element extends from the tip of the second extending portion in the same direction as the second extending portion
- the third element extends from the tip of the second extending portion. Since it extends in the direction along the ground surface from the base end shifted in the direction away from the ground surface via the four connection portions, the stray capacitance between the second element and the fifth extension portion, and the second element , The stray capacitance between the second element and the antenna element, the stray capacitance between the second element and the ground plane, and the third element and the third extension. Stray capacitance between the second extension portion and the ground plane, and stray capacitance between the third element and the second extension portion. A high degree of freedom of adjustment of the frequency can be obtained. *
- the antenna device substrate according to the third aspect, wherein the third element is connected to the surface band-shaped portion patterned on the surface of the substrate body and the surface band-shaped portion through a through hole. And having a back surface belt-like portion patterned on the back surface of the substrate body so as to face the front surface belt-like portion. That is, in this antenna device substrate, the third element is connected to the surface belt-like portion patterned on the surface of the substrate body and the surface belt-like portion through a through hole, and is opposed to the surface belt-like portion on the back surface of the substrate body.
- the length of the entire third element is shortened by configuring the third element with the front and back surfaces of the front surface belt portion and the back surface belt portion on the back surface. be able to.
- the stray capacitance between the third extension and the third extension can be adjusted according to the shape of the back strip. In particular, the length of the back strip is maximized and the width is grounded. By spreading it to the surface side, the impedance becomes lower than that of the surface band-like portion, and the influence of interference on the resonance frequency related to the first element is reduced.
- the antenna device substrate according to any one of the first to fourth aspects, wherein the ground connection pattern is connected to a front end side of the feeding-side passive element of the first element.
- a passive element and a fifth passive element connected to the base end side, and an impedance matching circuit is configured by the feeding-side passive element, the fourth passive element, and the fifth passive element.
- the ground connection pattern includes the fourth passive element and the fifth passive element connected to both ends of the feed-side passive element, and the feed-side passive element, the fourth passive element, and the fifth passive element.
- the impedance matching circuit is constituted by the elements, even if the adjustment cannot be sufficiently performed only by setting the power supply side passive element, the power supply side passive element, the fourth passive element, and the fifth passive element constituting the so-called ⁇ -type matching circuit. Depending on the element setting, fine adjustment of the resonance frequency and adjustment of the impedance become possible.
- the third extending portion is formed so as to be able to generate a stray capacitance so as to face the tip of the third element. It is characterized by being a wide part. That is, in this antenna device substrate, since the third extending portion is a wide portion formed so as to be able to generate a stray capacitance facing the tip portion of the third element, It becomes easy to set the stray capacitance between the wide portion and the effective area of the entire antenna is widened, so that a wider band and higher gain can be obtained.
- An antenna device includes the antenna device substrate according to any one of the first to sixth aspects, wherein the first passive element, the second passive element, and the third passive element correspond to each other. It is connected to the 1st connection part, the 2nd connection part, and the 3rd connection part, It is characterized by the above-mentioned. That is, in this antenna device, the first passive element, the second passive element, and the third passive element are connected to the corresponding first connection portion, second connection portion, and third connection portion, respectively. By simply selecting the third passive element as appropriate, two resonances or three resonances can be achieved, and communication is possible at two or three resonance frequencies corresponding to each application or device.
- An antenna device includes the antenna device substrate according to any one of the first to sixth aspects, wherein the first passive element is connected to the first connection portion, and the second passive element is provided. And any one of the third passive elements is connected to the corresponding second connection portion or third connection portion, respectively. That is, in this antenna device, the first passive element is connected to the first connection portion, and either one of the second passive element and the third passive element is connected to the corresponding second connection portion or third connection portion, respectively. Therefore, two types of two-resonance can be achieved without using the second passive element or the third passive element.
- the present invention has the following effects.
- the first element is between the stray capacitance between the second element, the stray capacitance between the third element, and the ground plane. Since the second and third elements and the ground plane are spaced apart from each other so as to be able to generate the stray capacitance, it is possible to achieve double resonance (two resonances and three resonances). Further, by selecting the first to third passive elements to be connected to the first to third connection portions, each resonance frequency can be adjusted flexibly, and an antenna capable of making two resonances or three resonances according to design conditions An apparatus can be obtained, and miniaturization and high performance can be achieved.
- the antenna device substrate of the present invention and the antenna device including the substrate can easily achieve multiple resonances corresponding to various applications and devices, and can save space.
- FIG. 1 is a wiring diagram showing an antenna device substrate and an antenna device in an embodiment of the antenna device substrate and the antenna device according to the present invention.
- FIG. In this embodiment it is a top view which shows an antenna apparatus.
- it is a top view which shows the board
- it is a back view which shows the board
- they are a perspective view (a), a plan view (b), a front view (c), and a bottom view (d) showing an antenna element.
- it is a wiring diagram which shows the stray capacitance which arises in the board
- it is a graph which shows the VSWR characteristic (voltage standing wave ratio) at the time of making it 3 resonance.
- it is a wiring diagram which shows the antenna apparatus which made 2 resonance by not using the 2nd passive element.
- it is a wiring diagram which shows the antenna apparatus which made the 2nd resonance without using the 3rd passive element.
- 4 is a graph showing a radiation pattern of an antenna device in an embodiment of the antenna device substrate and the antenna device according to the present invention.
- the antenna device substrate 1 includes an insulating substrate body 2, and a first element 3 and a second element each of which is formed by patterning a metal foil on the substrate body 2. 4, a third element 5, a ground plane GND, and a ground connection pattern 6. *
- the substrate body 2 is a general printed circuit board, and in this embodiment, a printed circuit board body made of a rectangular glass epoxy resin or the like is employed. Further, the ground plane GND is patterned on the back surface of the substrate body 2 with an antenna occupation area.
- the ground connection pattern 6 is patterned on the surface of the substrate body 2 and faces the ground surface GND on the back surface, and is electrically connected to each other through the through hole H.
- the ground surface GND may be formed on the surface of the substrate body 2. In this case, the ground connection pattern 6 is directly connected to the ground surface GND without passing through the through hole H, and the ground connection pattern 6 is formed integrally with the ground surface GND. *
- the first element 3 has a feeding point FP at the base end and a first connecting part C1 in which the feeding side passive element P0 and the first passive element P1 can be connected to an intermediate part and an antenna element AT of a dielectric antenna.
- the feeding point FP is connected to a high-frequency circuit (not shown) provided on the ground plane GND side of the substrate body 2.
- the second element 4 has a base end connected via a second connection part C2 to which the second passive element P2 can be connected between the power supply side passive element P0 of the first element 3 and the first connection part C1. It is extended. *
- the third element 5 has a base end connected via a third connection portion C3 to which the third passive element P3 can be connected between the power supply side passive element P0 of the first element 3 and the first connection portion C1. It is extended.
- the ground connection pattern 6 is connected to the ground plane GND, and the second element 4 and the third element 5 of the first element 3 through ground-side passive elements (fourth passive element P4 and fifth passive element P5). It is connected to the base end side rather than the connection part.
- at least one of the first element 3, the second element 4, and the third element 5 is patterned from the front surface to the back surface of the substrate body 2 through the through holes H. *
- the first element 3 includes a first extending portion E1 extending from the feeding point FP in a direction away from the ground surface GND, and a direction along the ground surface GND from the tip of the first extending portion E1 (adjacent ground surfaces A second extending portion E2 extending in an extending direction of the outer edge of the GND and extending in a direction perpendicular to the direction away from the ground surface GND, and the first connecting portion C1 from the distal end of the second extending portion E2.
- a third extending portion E3 connected to the antenna element AT extending in the direction along the ground surface GND from the base end shifted in the direction away from the ground surface GND and the tip of the antenna element AT A fourth extending portion E4 extending from the tip of the fourth extending portion E4 toward the ground surface GND, and a fifth extending portion E5 extending from the tip end of the fourth extending portion E4 toward the first extending portion E1 along the ground surface GND.
- a sixth extending portion E6 having a base end connected to the tip of the fifth extending portion E5 by a through hole H and a tip connected to the base end of the fourth extending portion E4 by a through hole H. 2 on the back.
- the first element 3 is connected to the front surface side of the antenna element AT on the surface linear portion patterned on the surface of the substrate body 2 and to the surface linear portion via a through hole.
- the front end loop portion is formed in a loop shape with a back surface linear portion patterned on the back surface of the substrate body 2.
- the fourth extending portion E4 and the fifth extending portion E5 are the front surface linear portions and the sixth extending portion E6 is the back surface linear portion, and the fourth extending portion E4 and the fifth extending portion
- the portion E5 and the sixth extending portion E6 constitute a substantially triangular tip loop portion.
- the connecting portion between the fifth extending portion E5 and the sixth extending portion E6 is a folded portion that is folded at an acute angle through the through hole H.
- a pattern is formed immediately above the sixth extending portion E6 so that the antenna element AT and the second element E7 are not located. That is, if the sixth extending portion E6 extends directly below the antenna element AT and the second element E7, the bandwidth may be reduced due to interference, and the antenna performance may be degraded.
- the sixth extending portion E6 is patterned with diagonal lines so as to avoid the antenna element AT, the second element 4, the fourth extending portion E4, and the fifth extending portion E5.
- a wide back surface portion E6a is formed in a pattern at a connection portion between the distal end of the sixth extending portion E6 and the base end of the fourth extending portion E4 via the through hole H.
- the wide back surface portion E6a has a rectangular shape facing the fourth extending portion E4 and having a long side along the extending direction of the fourth extending portion E4.
- the wide back surface portion E6a is in the open loop of the fourth extending portion E4 and the fifth extending portion E5 generated by the sixth extending portion E6, and has a small influence, so the fourth extending portion E4.
- the pattern is designed so as to extend from the base end side (antenna element AT side) to the tip direction.
- the second element 4 extends in the same direction as the second extending portion E2 from the tip of the second extending portion E2.
- the third element 5 extends in the direction along the ground surface GND from the base end shifted in the direction away from the ground surface GND from the tip of the first extending portion E1 via the third connection portion C3. It extends toward the existing part E3.
- the third element 5 is connected to the surface belt-like portion 5a patterned on the surface of the substrate body 2 and the surface belt-like portion 5a through a through hole H, and is opposed to the surface belt-like portion 5a on the back surface of the substrate body 2. It has the back surface belt-shaped part 5b by which pattern formation was carried out.
- the ground connection pattern 6 includes a fourth passive element P4 connected to the front end side of the power supply side passive element P0 of the first element 3 and a fifth passive element P5 connected to the base end side.
- An impedance matching circuit is configured by P0, the fourth passive element P4, and the fifth passive element P5. *
- the third extending portion E3 is a wide portion formed to face the tip of the third element 5 so as to generate stray capacitance.
- the third extending portion E3, which is a wide portion, has a rectangular shape in which the line width is set larger than the portions such as the second element 4 and the fifth extending portion E5.
- the three elements 5 are arranged to face the tip side.
- the second extending portion E2 and the fourth extending portion E4 are also wide portions. *
- the first element 3 can generate the stray capacitance between the second element 4, the stray capacitance between the third element 5, and the stray capacitance between the ground plane GND and the second element 3.
- the element 4, the third element 5, and the ground plane GND are extended at intervals. That is, as shown in FIG. 6, the stray capacitance Ca between the second element 4 and the fifth extending portion E5, the stray capacitance Cb between the second element 4 and the fourth extending portion E4, The stray capacitance Cd between the second element 4 and the antenna element AT, the stray capacitance Cf between the second element 4 and the ground plane GND, and the stray capacitance between the third element 5 and the third extending portion E3.
- Cg, stray capacitance Ch between the third element 5 and the second extending portion E2, and stray capacitance Ci between the second extending portion E2 and the ground plane GND can be generated.
- the thickness of the substrate body 2 is increased when extending toward the third extending part E3.
- interference occurs in the band of the lowest resonance frequency f1, which needs to be considered. That is, by making the back surface belt-like portion 5b wider in the direction toward the second extending portion E2, the impedance becomes lower than that of the front surface belt-like portion 5a, and the influence of interference is reduced.
- the stray capacitance between the back strip 5b and the second extending portion E2 is effectively generated by the stray capacitance due to the thickness of the substrate body 2 and the dielectric constant. Therefore, it is effective to design the length of the back surface strip portion 5b so that the length of the front surface strip portion 5a is maximized and the width is extended to the second extending portion E2.
- the antenna element AT is a loading element that does not self-resonate at a desired resonance frequency, and is a chip antenna in which a conductor pattern 22 such as Ag is formed on the surface of a dielectric 21 such as ceramics as shown in FIG. is there.
- a conductor pattern 22 such as Ag is formed on the surface of a dielectric 21 such as ceramics as shown in FIG. is there.
- elements having different lengths, widths, conductor patterns 22 and the like may be selected according to the setting of the resonance frequency and the like, and the same element may be selected. *
- the antenna device 10 of the present embodiment includes the antenna device substrate 1, and the first passive element P1, the second passive element P2, and the third passive element P3 correspond to each other. It is connected to the first connection part C1, the second connection part C2, and the third connection part C3.
- the feed-side passive element P0, the fourth passive element P4, and the fifth passive element P5 constituting the impedance matching circuit are preferably set as follows.
- impedance adjustment of the first and second resonance frequencies f1 and f2 can be performed by changing the constant of the fourth passive element P4.
- impedance adjustment of the second and third resonance frequencies f2 and f3 can be performed by changing the constant of the fifth passive element P5 or the like.
- the impedances of the second and third resonance frequencies f2 and f3 can be adjusted by changing the constant of the fourth passive element P4.
- the first resonance frequency f1 is in a low frequency band among the three resonance frequencies, and is determined by the first element 3, the antenna element AT, the first passive element P1, the feed-side passive element P0, and the stray capacitance. Is done.
- the second resonance frequency f2 is an intermediate frequency band among the three resonance frequencies, and is determined by the second element 4, the second passive element P2, the power supply side passive element P0, and the stray capacitance.
- the third resonance frequency f3 is in a high frequency band among the three resonance frequencies, and is determined by the third element 5, the third passive element P3, the feeding-side passive element P0, and the stray capacitance. . Further, final impedance adjustment is performed for each resonance frequency by controlling the flow of the high-frequency current flowing on the ground plane GND side using the fourth passive element P4 and the fifth passive element P5.
- these resonance frequencies will be described in more detail.
- the frequencies of the first resonance frequency f1 are the lengths of the second extending portion E2, the third extending portion E3, the fourth extending portion E4, and the fifth extending portion E5. And the sixth extending portion E6 can be set and adjusted.
- the broadening of the first resonance frequency f1 is set by the lengths and widths of the second extending portion E2, the third extending portion E3, the fourth extending portion E4, and the fifth extending portion E5. be able to.
- the impedance adjustment of the first resonance frequency f1 can be performed by setting each of the stray capacitances Ca, stray capacitance Cb, stray capacitance Cd, stray capacitance Ce, and stray capacitance Ci. Furthermore, the final frequency adjustment can be flexibly performed by selecting the first passive element P1 and the power supply side passive element P0. *
- the final impedance adjustment can be flexibly performed by selecting the fourth passive element P4 and the fifth passive element P5.
- the resonance frequency, bandwidth, and impedance can be flexibly adjusted by “length and width of each element length”, “each passive element”, “antenna element AT”, and “stray capacitance between each element”. is there. That is, the first resonance frequency f1 is adjusted mainly at the portion indicated by the broken line A1 in FIG. *
- the frequency of the second resonance frequency f2 can be set and adjusted by the lengths of the second extending portion E2 and the second element 4. Further, the broadening of the second resonance frequency f2 can be set by the lengths and widths of the second extending portion E2 and the second element 4.
- the impedance adjustment of the second resonance frequency f2 can be performed by setting each of the stray capacitance Ca, the stray capacitance Cb, the stray capacitance Cd, the stray capacitance Cf, and the stray capacitance Ci. Furthermore, the final frequency adjustment can be flexibly performed by selecting the second passive element P2 and the power supply side passive element P0. *
- the final impedance adjustment can be flexibly performed by selecting the fourth passive element P4 and the fifth passive element P5.
- the resonance frequency, bandwidth, and impedance can be flexibly adjusted by “the length and width of each element length”, “each passive element”, and “the stray capacitance between each element”. That is, the second resonance frequency f2 is adjusted mainly at the portion of the dashed-dotted line A2 in FIG. *
- the frequency of the third resonance frequency f3 can be set and adjusted by the length of the third element 5 (the front surface strip portion 5a and the back surface strip portion 5b). Further, the broadening of the third resonance frequency f3 can be set by the length and width of the second extending portion E2 and the second element 4. *
- the impedance adjustment of the third resonance frequency f3 can be performed by setting each of the stray capacitance Cg, stray capacitance Ch, and stray capacitance Ci. Furthermore, the final frequency adjustment can be flexibly performed by selecting the third passive element P3 and the power supply side passive element P0.
- the final impedance adjustment can be flexibly performed by selecting the fourth passive element P4 and the fifth passive element P5.
- the resonance frequency, bandwidth, and impedance can be flexibly adjusted by “the length and width of each element length”, “each passive element”, and “the stray capacitance between each element”. That is, the third resonance frequency f3 is adjusted mainly at a portion indicated by a two-dot chain line A3 in FIG. *
- the antenna occupation area (installation area allowed for the antenna device 10) A4 on the substrate body 2 is preferably larger as antenna characteristics, and the other configurations are preferably set under the following conditions. That is, it is desirable to set a long distance from the ground plane GND to the upper end (third element 5) of the antenna device substrate 1 in terms of stray capacitance. Also, it is desirable that the width of the antenna size (the distance from the base end of the second extending portion E2 to the outer edge of the fourth extending portion E4) is wider because of the stray capacitance. *
- the distance from the ground surface GND to the fifth extending portion E5 is longer.
- the width of the fourth extending portion E4 is desirably wide, and the length and width of the third extending portion E3 of the wide portion are desirably long or wide.
- the length and width of the second extending portion E2 be longer or wider.
- the size of the substrate body 2 in the direction along the first extending portion E1 is preferably about one-fourth of the wavelength to be used. It is also possible to shorten the second element 4 by changing the second element 4 to an antenna element (so-called chip antenna) of a dielectric antenna extending in the same direction. *
- the antenna device 10 of this embodiment it is possible to change the resonance frequency in consideration of the influence around the antenna (peripheral parts, human body, etc.). That is, it is possible to change the adjustment location of the second resonance frequency f2 and the adjustment location of the third resonance frequency f3 flexibly by changing the selection and setting of the antenna element AT and each passive element according to the application. It is. That is, by setting the portion of the alternate long and short dash line A2 for adjusting the second resonance frequency f2 and the portion of the alternate long and two short dashes line A3 for adjusting the third resonance frequency f3, the first portion of the alternate long and short dash line A2 3 and the second resonance frequency f2 can be adjusted at the portion of the two-dot chain line A3.
- the antenna device substrate 1 and the antenna device 10 of the present embodiment not only the above-described three resonances but also two resonances are possible.
- the antenna device 10 of the present embodiment is used for the same model, and it is desired to use it at two resonances at the present stage and to use it at three resonances in the future. Even in such a case, the antenna device substrate 1 can be made to have two resonances and three resonances.
- the method of making the two resonances there are two methods: a method of not using the second passive element P2 as shown in FIG. 8, and a method of not using the third passive element P3 as shown in FIG. There are different ways to deal with it. Since the frequency band in that case can be individually adjusted as described above, it can be designed flexibly in a desired frequency band. *
- the first element 3 has the stray capacitance between the second element 4, the stray capacitance between the third element 5, and the ground plane. Since it is spaced from the second element 4, the third element 5 and the ground plane GND so as to be able to generate a stray capacitance with the GND, the loading element does not self-resonate at a desired resonance frequency.
- the antenna element AT and the stray capacitance between each element it is possible to achieve double resonance (two resonances, three resonances).
- Each resonance frequency can be flexibly adjusted by selecting the first to third passive elements P1 to P3 connected to the antenna element AT and the first to third connection parts C1 to C3 (changing constants, etc.).
- An antenna device capable of achieving two resonances or three resonances according to conditions can be obtained.
- each resonance frequency can be flexibly adjusted with one antenna device substrate 1 due to the antenna configuration, so that the resonance frequency can be changed, and the adjustment location by a passive element or the like can be changed according to the application or device. It has become.
- the design can be made in the plane of the substrate body 2, and the thickness can be reduced as compared with the case where a conventional dielectric block or resin molding is used, and the antenna element AT which is a dielectric antenna is selected. This also enables downsizing and higher performance. Further, there is no need for costs due to molds, design changes, etc., and low costs can be realized.
- the antenna device substrate 1 at least one of the first element 3, the second element 4, and the third element 5 is patterned from the front surface to the back surface of the substrate body 2 through the through holes H.
- the design of the elements patterned on the back surface as well as the front surface of the substrate body 2 makes it possible to achieve both high performance and downsizing of the antenna without increasing the area occupied by the antenna.
- the surface linear portion patterned on the surface of the substrate body 2 is connected to the front surface side of the antenna element AT through the through hole H and folded with respect to the surface linear portion. It has a tip loop portion (fourth extending portion E4, fifth extending portion E5 and sixth extending portion E6) formed in a loop shape with a back surface linear portion patterned on the back surface of the substrate body 2. Therefore, the impedance can be lowered as compared with the case where the tip is an open end, and a wider band can be achieved by providing a folded portion.
- the back side as well as the back side are used to form a loop, allowing pattern formation with a high degree of design freedom without interfering with other elements on the front side, and radiation from the back side. Thus, a high gain can be achieved.
- the third element 5 is connected to the surface belt-like portion 5a patterned on the surface of the substrate body 2 and the surface belt-like portion 5a through the through hole H, and is opposed to the surface belt-like portion 5a on the back surface of the substrate body 2. Since the back surface band-shaped portion 5b is patterned, the third element 5 is configured by the front and back surfaces of the front surface belt-shaped portion 5a and the back surface back-band portion 5b. The length can be shortened. Further, the stray capacitance Cg with the third extending portion E3 can be adjusted according to the shape of the back surface strip portion 5b, and in particular, the length of the third element 5 is maximized and the length of the front surface strip portion 5a is maximized. By expanding the width to the ground plane GND side, the impedance becomes lower than that of the surface band portion 5a, and the influence of interference on the resonance frequency related to the first element 3 is reduced. *
- the ground connection pattern 6 includes a fourth passive element P4 and a fifth passive element P5 connected to both ends of the power supply side passive element P0, and the power supply side passive element P0, the fourth passive element P4, and the fifth passive element. Since the impedance matching circuit is configured by P5, even if the adjustment cannot be sufficiently performed only by the setting of the power supply side passive element P0, the power supply side passive element P0, the fourth passive element P4, and the so-called ⁇ -type matching circuit By setting the fifth passive element P5, the resonance frequency can be finely adjusted and the impedance can be adjusted. *
- the third extending portion E3 is a wide portion formed so as to be able to generate the stray capacitance Cg facing the tip portion of the third element 5, the tip portion and the wide portion of the third element 5
- the stray capacitance Cg can be easily set, and the effective area of the entire antenna is widened, so that a wider band and higher gain can be obtained.
- the antenna device 10 of the present embodiment includes the antenna device substrate 1, and the first passive element P1, the second passive element P2, and the third passive element P3 correspond to the corresponding first connection portion C1, second Since it is connected to the connection part C2 and the third connection part C3, two resonances or three resonances can be realized by simply selecting the first to third passive elements P1 to P3 as appropriate. Or communication is possible at three resonance frequencies.
- first passive element P1 is connected to the first connection part C1
- second passive element P2 and the third passive element P3 is connected to the corresponding second connection part C2 or third connection part C3, respectively. Since they are connected, two types of two-resonance can be achieved without using the second passive element P2 or the third passive element P3.
- the extending direction of the first extending portion E1 is the X direction
- the extending direction of the second extending portion E2 is the Y direction
- the direction perpendicular to the ground plane GND is the direction perpendicular to the surface
- vertical polarization with respect to the YZ plane was measured.
- each passive element used an inductor for each of the first passive element P1: 4.7 nH
- the second passive element P2 5.6 nH
- the third passive element P3 10 nH.
- an inductor of the fourth passive element P4: 6.8 nH and a capacitor of the fifth passive element P5: 0.5 pF were used, and an inductor of the feed side passive element P0: 1.2 nH was used.
- FIG. 10A shows a radiation pattern at the first resonance frequency f1 in the 800 MHz band, the first resonance frequency f1: 871 MHz, VSWR: 1.71, and bandwidth (VSWR ⁇ 3). ): 85 MHz.
- FIG. 10B is a radiation pattern at the second resonance frequency f2 in the 1575 MHz band. The second resonance frequency f2 is 1569 MHz, VSWR is 1.57, and the bandwidth (VSWR). ⁇ 3): 86 MHz.
- FIG. 10C shows a radiation pattern at the third resonance frequency f3 in the 2000 MHz band, the third resonance frequency f3: 2005 MHz, VSWR: 1.72, and the bandwidth (VSWR). ⁇ 3): 214 MHz.
- nearly omnidirectional antenna characteristics are obtained for the 800 MHz band and 1575 MHz band, and antenna characteristics having directivity in the 90-degree direction are obtained for the 2000 MHz band. *
- this invention is not limited to the said embodiment, A various change can be added in the range which does not deviate from the meaning of this invention.
- one passive element is mounted on each connection portion, but the number is not limited to one, and a plurality of passive elements may be mounted.
- the first to third passive elements may be mounted in series or in parallel.
- SYMBOLS 1 Antenna device board
- E4 Fourth extending part
- E5 Fifth extending part
- E6 Sixth extending part
- FP Feeding point
- GND Ground plane
- H Through hole
- P0 Passive side passive element
- P2 ... 2nd passive element P3 ... 3rd passive element
- P4 ... 4th passive element ground side passive element
- P5 ... 5th passive element ground side passive element
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Abstract
Description
のいずれかのアンテナ装置用基板を備え、前記第1受動素子、前記第2受動素子および前記第3受動素子が、それぞれ対応する前記第1接続部、前記第2接続部および前記第3接続部に接続されていることを特徴とする。 すなわち、このアンテナ装置では、第1受動素子、第2受動素子および第3受動素子が、それぞれ対応する第1接続部、第2接続部および第3接続部に接続されているので、第1~第3受動素子を適宜選択するだけで2共振化または3共振化でき、用途や機器毎に対応した2つまたは3つの共振周波数で通信が可能である。
帯状部5bと第2延在部E2との間の浮遊容量は、基板本体2の厚みおよび誘電率による浮遊容量により、効果的に発生する。したがって、裏面帯状部5bの長さは、表面帯状部5aの長さを最大として、幅を第2延在部E2側に延ばす設計が有効である。
が開放端とされる場合に比べてインピーダンスを下げることができると共に、折り返し部を設けることで広帯域化を図ることができる。また、表面だけでなく裏面も利用してループ状となっているため、表面側の他のエレメントに干渉せずに高い設計自由度を有してパターン形成可能であると共に、裏面からも放射可能になり、高利得化を図ることができる。
Claims (12)
- 絶縁性の基板本体と、 該基板本体にそれぞれ金属箔でパターン形成された第1エレメント、第2エレメント、第3エレメント、グランド面およびグランド接続パターンとを備え、 前記第1エレメントが、基端に給電点が設けられていると共に中間部に給電側受動素子と第1受動素子が接続可能な第1接続部と誘電体アンテナのアンテナ素子とをこの順に有して延在し、 前記第2エレメントが、前記第1エレメントの前記給電側受動素子と前記第1接続部との間に第2受動素子が接続可能な第2接続部を介して基端が接続されて延在し、 前記第3エレメントが、前記第1エレメントの前記給電側受動素子と前記第1接続部との間に第3受動素子が接続可能な第3接続部を介して基端が接続されて延在し、 前記グランド接続パターンが、前記グランド面に接続されていると共にグランド側受動素子を介して前記第1エレメントの前記第2エレメントおよび第3エレメントの接続部分よりも基端側に接続され、 前記第1エレメントが、前記第2エレメントとの間の浮遊容量と、前記第3エレメントとの間の浮遊容量と、前記グランド面との間の浮遊容量とを発生可能に、前記第2エレメント、前記第3エレメントおよび前記グランド面に対して間隔を空けて延在し、 前記第1エレメント、第2エレメントおよび前記第3エレメントの少なくとも一つが、スルーホールを介して前記基板本体の表面から裏面にわたってパターン形成されていることを特徴とするアンテナ装置用基板。
- 請求項1に記載のアンテナ装置用基板において、 前記第1エレメントが、前記アンテナ素子より先端側に、前記基板本体の表面にパターン形成された表面線状部と該表面線状部にスルーホールを介して接続され前記表面線状部に対して折り返した状態で前記基板本体の裏面にパターン形成された裏面線状部とでループ状に形成された先端ループ部を有していることを特徴とするアンテナ装置用基板。
- 請求項2に記載のアンテナ装置用基板において、 前記第1エレメントが、前記グランド面から離間する方向に前記給電点から延びる第1延在部と、該第1延在部の先端から前記グランド面に沿った方向へ延びる第2延在部と、該第2延在部の先端から前記第1接続部を介して前記グランド面から離間する方向にずれた基端から前記グランド面に沿った方向へ延びて同方向に延在する前記アンテナ素子に接続された第3延在部と、前記アンテナ素子の先端から前記グランド面に向かって延びる第4延在部と、該第4延在部の先端から前記グランド面に沿って前記第1延在部に向かって延びる第5延在部とを前記基板本体の表面に有していると共に、基端が該第5延在部の先端にスルーホールで接続され先端が前記第4延在部の基端にスルーホールで接続された第6延在部を前記基板本体の裏面に有し、 前記第2エレメントが、前記第2延在部の先端から該第2延在部と同方向に延びており、 前記第3エレメントが、前記第1延在部の先端から前記第4接続部を介して前記グランド面から離間する方向にずれた基端から前記グランド面に沿った方向へ延びていることを特徴とするアンテナ装置用基板。
- 請求項3に記載のアンテナ装置用基板において、 前記第3エレメントが、前記基板本体の表面にパターン形成された表面帯状部と該表面帯状部にスルーホールを介して接続され前記基板本体の裏面に前記表面帯状部に対向してパターン形成された裏面帯状部とを有していることを特徴とするアンテナ装置用基板。
- 請求項1または2に記載のアンテナ装置用基板において、 前記グランド接続パターンが、前記第1エレメントの前記給電側受動素子の先端側に接続された第4受動素子および基端側に接続された第5受動素子を有し、前記給電側受動素子、前記第4受動素子および前記第5受動素子によりインピーダンスの整合回路が構成されていることを特徴とするアンテナ装置用基板。
- 請求項3に記載のアンテナ装置用基板において、 前記第3延在部が、前記第3エレメントの先端部に対向して浮遊容量を発生可能に形成された幅広部とされていることを特徴とするアンテナ装置用基板。
- 請求項1または2に記載のアンテナ装置用基板を備え、 前記第1受動素子、前記第2受動素子および前記第3受動素子が、それぞれ対応する前記第1接続部、前記第2接続部および前記第3接続部に接続されていることを特徴とするアンテナ装置。
- 請求項1または2に記載のアンテナ装置用基板を備え、 前記第1受動素子が、前記第1接続部に接続され、 前記第2受動素子および前記第3受動素子のいずれか一方が、それぞれ対応する前記第2接続部または前記第3接続部に接続されていることを特徴とするアンテナ装置。
- 前記グランド接続パターンが、前記第1エレメントの前記給電側受動素子の先端側に接続された第4受動素子および基端側に接続された第5受動素子を有し、前記給電側受動素子、前記第4受動素子および前記第5受動素子によりインピーダンスの整合回路が構成されていることを特徴とする請求項1または2に記載のアンテナ装置用基板を備え、 前記第1受動素子、前記第2受動素子および前記第3受動素子が、それぞれ対応する前記第1接続部、前記第2接続部および前記第3接続部に接続されていることを特徴とするアンテナ装置。
- 前記グランド接続パターンが、前記第1エレメントの前記給電側受動素子の先端側に接続された第4受動素子および基端側に接続された第5受動素子を有し、前記給電側受動素子、前記第4受動素子および前記第5受動素子によりインピーダンスの整合回路が構成されていることを特徴とする請求項1または2に記載のアンテナ装置用基板を備え、前記第1受動素子が、前記第1接続部に接続され、 前記第2受動素子および前記第3受動素子のいずれか一方が、それぞれ対応する前記第2接続部または前記第3接続部に接続されていることを特徴とするアンテナ装置。
- 前記第3延在部が、前記第3エレメントの先端部に対向して浮遊容量を発生可能に形成された幅広部とされていることを特徴とする請求項3に記載のアンテナ装置用基板を備え、 前記第1受動素子、前記第2受動素子および前記第3受動素子が、それぞれ対応する前記第1接続部、前記第2接続部および前記第3接続部に接続されていることを特徴とするアンテナ装置。
- 前記第3延在部が、前記第3エレメントの先端部に対向して浮遊容量を発生可能に形成された幅広部とされていることを特徴とする請求項3に記載のアンテナ装置用基板を備え、前記第1受動素子が、前記第1接続部に接続され、 前記第2受動素子および前記第3受動素子のいずれか一方が、それぞれ対応する前記第2接続部または前記第3接続部に接続されていることを特徴とするアンテナ装置。
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US13/993,175 US9203145B2 (en) | 2010-12-28 | 2011-12-15 | Antenna-device substrate and antenna device |
EP11852628.4A EP2660931B1 (en) | 2010-12-28 | 2011-12-15 | Substrate for antenna device and antenna device |
KR1020137016686A KR101831477B1 (ko) | 2010-12-28 | 2011-12-15 | 안테나 장치용 기판 및 안테나 장치 |
CN201180062692.7A CN103299483B (zh) | 2010-12-28 | 2011-12-15 | 天线装置用基板及天线装置 |
HK13112022.2A HK1184914A1 (en) | 2010-12-28 | 2013-10-24 | Substrate for antenna device and antenna device |
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JP2010293924A JP5645121B2 (ja) | 2010-12-28 | 2010-12-28 | アンテナ装置用基板およびアンテナ装置 |
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CN (1) | CN103299483B (ja) |
HK (1) | HK1184914A1 (ja) |
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EP3001502A4 (en) * | 2013-05-20 | 2017-01-18 | Mitsubishi Materials Corporation | Antenna device use board and antenna device |
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JP6032001B2 (ja) * | 2012-12-27 | 2016-11-24 | 三菱マテリアル株式会社 | アンテナ装置 |
TWI581500B (zh) * | 2013-01-21 | 2017-05-01 | Mitsubishi Materials Corp | Antenna device |
TWI578614B (zh) * | 2013-05-21 | 2017-04-11 | Mitsubishi Materials Corp | Antenna device substrate and antenna device |
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US11831090B2 (en) * | 2020-06-16 | 2023-11-28 | Apple Inc. | Electronic devices with display-overlapping antennas |
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- 2011-12-15 WO PCT/JP2011/007020 patent/WO2012090415A1/ja active Application Filing
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EP2660931B1 (en) | 2019-02-06 |
HK1184914A1 (en) | 2014-01-30 |
TW201242165A (en) | 2012-10-16 |
EP2660931A4 (en) | 2017-07-12 |
US20130265207A1 (en) | 2013-10-10 |
CN103299483A (zh) | 2013-09-11 |
KR101831477B1 (ko) | 2018-02-22 |
US9203145B2 (en) | 2015-12-01 |
KR20140004665A (ko) | 2014-01-13 |
CN103299483B (zh) | 2015-05-20 |
TWI532251B (zh) | 2016-05-01 |
JP2012142775A (ja) | 2012-07-26 |
EP2660931A1 (en) | 2013-11-06 |
JP5645121B2 (ja) | 2014-12-24 |
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