WO2013102967A1 - Dispositif d'antenne - Google Patents

Dispositif d'antenne Download PDF

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Publication number
WO2013102967A1
WO2013102967A1 PCT/JP2012/007683 JP2012007683W WO2013102967A1 WO 2013102967 A1 WO2013102967 A1 WO 2013102967A1 JP 2012007683 W JP2012007683 W JP 2012007683W WO 2013102967 A1 WO2013102967 A1 WO 2013102967A1
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WO
WIPO (PCT)
Prior art keywords
antenna
frequency
antenna device
modification
elements
Prior art date
Application number
PCT/JP2012/007683
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English (en)
Japanese (ja)
Inventor
佐藤　浩
小柳　芳雄
Original Assignee
パナソニック株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Priority to JP2013552339A priority Critical patent/JP5703450B2/ja
Publication of WO2013102967A1 publication Critical patent/WO2013102967A1/fr

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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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • 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

Definitions

  • the present invention relates to an antenna device suitable for use in a portable wireless terminal.
  • MIMO Multiple Input Multiple Multiple Output
  • Patent Document 1 discloses a technique for reducing the coupling by inserting a junction element between two antenna elements.
  • Patent Document 2 discloses a technique in which stub elements are arranged between antennas so that the antennas can be arranged close to each other.
  • the above-described MIMO communication is an effective means for improving the communication capacity
  • communication is performed at the same frequency using a plurality of antenna elements. Therefore, if the coupling between the antenna elements is not reduced, the antenna efficiency is degraded.
  • a desired communication capacity cannot be obtained due to an increase in the correlation coefficient. For example, as shown in FIG. 30, when two antenna elements 100 and 101 are arranged close to each other, for example, 40% of the energy emitted from the antenna element 100 is coupled to the adjacent antenna element 101 due to the coupling between the antenna elements. Will be absorbed. By reducing the coupling between the antenna elements, it becomes possible to release 80% of energy from the antenna element 100. Thus, antenna efficiency can be improved by reducing coupling between antenna elements. The communication capacity can be improved by improving the antenna efficiency.
  • the correlation coefficient between the antenna elements in the two antenna elements can be derived from the equation shown in FIG.
  • S parameters S12 and S21 each represent a connection. If this coupling (S12 and S21) is small, the correlation is low and the communication capacity is improved.
  • the coupling between the antenna elements there are (1) a method of increasing the distance between the antenna elements, and (2) a method of connecting the antenna elements using lumped constant components.
  • the method (1) it is difficult to fit in the casing of a small portable wireless terminal.
  • the coupling can be reduced, but a loss is generated due to the resistance of the lumped component, and the antenna efficiency is degraded accordingly.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide an antenna device that can reduce the coupling between antenna elements in a plurality of antenna elements, improve the efficiency of the antenna, and reduce the correlation coefficient.
  • the antenna device of the present invention includes a first radio circuit that operates at a first frequency, a first power feeding unit connected to the first radio circuit, a first antenna element fed from the first power feeding unit, A second radio circuit operating at the first frequency; a second power feeding unit connected to the second radio circuit; and a second antenna element fed from the second power feeding unit.
  • the antenna element includes a first element having an electrical length of ⁇ / 4 at the second frequency and a second element having an electrical length of ⁇ / 4 or 3 ⁇ / 4 at the third frequency, and the first element
  • the second element is electrically connected in the vicinity of the first power feeding unit, and the first power feeding unit is connected to the first antenna element via a first matching circuit unit for matching at the second frequency.
  • the second frequency is the first frequency.
  • the first frequency is higher than the third frequency
  • the second antenna element includes a third element having an electrical length of ⁇ / 4 at a fourth frequency
  • the third element and the fourth element are electrically connected in the vicinity of the second power feeding unit, and the second power feeding. Is connected to the second antenna element via a second matching circuit for matching at the fourth frequency, the fourth frequency being higher than the first frequency, and the first frequency
  • the frequency is higher than the fifth frequency.
  • the first and second antennas are separated by using a lumped constant component (component for reducing the coupling between the first and second antenna elements) or by separating the distance between the first and second antenna elements.
  • the coupling between the first and second antenna elements can be reduced without connecting the elements.
  • the first and second antenna elements can be arranged close to each other without arranging the stub between the first and second antenna elements, and the cost for the stub can be reduced. That is, the coupling can be reduced at a lower cost and with a lower loss than in the past. As a result, the antenna efficiency can be improved and the correlation coefficient can be reduced.
  • the second frequency and the fourth frequency are equal, and the third frequency and the fifth frequency are equal.
  • the coupling between antenna elements in a plurality of antenna elements can be reduced, the efficiency of the antenna can be improved, and the correlation coefficient can be reduced.
  • FIG. 1 Schematic diagram showing the basic configuration of the antenna device according to the first embodiment of the present invention.
  • the perspective view which shows the specific structure of the antenna apparatus of FIG. (A), (b) The figure which shows the frequency characteristic of the antenna apparatus of FIG. The figure which shows the formula of Y12 component of an admittance matrix
  • the schematic diagram which shows the basic composition of the example which enlarged the difference of the branch element length in each of the 1st antenna element and the 2nd antenna element of the antenna apparatus of FIG. (A), (b) The figure which shows the frequency characteristic at the time of enlarging the difference of branch element length in each of the 1st antenna element of the antenna apparatus of FIG. 1, and a 2nd antenna element.
  • the perspective view which shows the specific structure of the modification 1-1 of the antenna apparatus of FIG.
  • the perspective view which shows the specific structure of the modification 1-2 of the antenna apparatus of FIG. The perspective view which shows the specific structure of the modification 1-3 of the antenna apparatus of FIG.
  • the perspective view which shows the specific structure of the modification 1-4 of the antenna apparatus of FIG. The perspective view which shows the specific structure of the modification 1-5 of the antenna apparatus of FIG.
  • the perspective view which shows the specific structure of the modification 1-6 of the antenna apparatus of FIG. The perspective view which shows the specific structure of the modification 1-7 of the antenna apparatus of FIG.
  • the perspective view which shows the specific structure of the modification 1-8 of the antenna apparatus of FIG. The perspective view which shows the specific structure of the modification 1-9 of the antenna apparatus of FIG.
  • the perspective view which shows the specific structure of the modification 1-11 of the antenna apparatus of FIG. The perspective view which shows the specific structure of the modification 1-12 of the antenna apparatus of FIG.
  • the perspective view which shows the specific structure of the modification 1-13 of the antenna apparatus of FIG. Schematic diagram showing the basic configuration of the antenna device according to the second embodiment of the present invention.
  • the figure which shows the frequency characteristic of the antenna apparatus of FIG. FIG. 22A is a diagram in which the frequency characteristics of (a) and the frequency characteristics of (b) are superimposed.
  • FIG. 7 is a perspective view showing an overview of a portable wireless terminal using an application example of the antenna device of FIG. The figure for demonstrating the problem in the conventional antenna device The figure which shows the formula of the correlation coefficient between the antenna elements in two antenna elements
  • FIG. 1 is a schematic diagram showing a basic configuration of an antenna apparatus according to Embodiment 1 of the present invention.
  • an antenna device 1 according to the present embodiment includes a first radio circuit 2 that operates at a first frequency f1, a first feeding unit 3 connected to the first radio circuit 2, and a first feeding unit.
  • a first matching circuit unit 4 connected to 3 and a first antenna element 5 having a branching element fed from the first feeding unit 3 via the first matching circuit unit 4 and having different long and short sides.
  • a second radio circuit 6 that operates at the first frequency f1, a second power feeding unit 7 connected to the second radio circuit 6, a second matching circuit unit 8 connected to the second power feeding unit 7, A second antenna element 9 that is fed from the second feeding section 7 via the second matching circuit section 8 and has branching elements having different long sides and short sides.
  • the first antenna element 5 includes a first element (short-side branching element) 51 having an electrical length of ⁇ / 4 at the second frequency f2, and a second element having an electrical length of 3 ⁇ / 4 at the third frequency f3. (Long side branch element) 52.
  • the first element 51 and the second element 52 are electrically connected in the vicinity of the first power feeding unit 3.
  • the 1st electric power feeding part 3 is connected to the 1st antenna element 5 via the 1st matching circuit part 4 matched with the 2nd frequency f2.
  • the second frequency f2 is higher than the first frequency f1, and the first frequency f1 is higher than the third frequency f3.
  • the second antenna element 9 includes a third element (short-side branching element) 91 having an electrical length of ⁇ / 4 at a fourth frequency f4 and a fourth element having an electrical length of 3 ⁇ / 4 at a fifth frequency f5. (Long side branch element) 92.
  • the third element 91 and the fourth element 92 are electrically connected in the vicinity of the second power feeding unit 7.
  • the 2nd electric power feeding part 7 is connected to the 2nd antenna element 9 via the 2nd matching circuit part 8 matched with the 4th frequency f4.
  • the fourth frequency f4 is higher than the first frequency f1, and the first frequency f1 is higher than the fifth frequency f5.
  • the first element 51 and the third element 91 have the same electrical length
  • the second element 52 and the fourth element 92 have the same electrical length.
  • the frequency f2 and the fourth frequency f4 are equal
  • the third frequency f3 and the fifth frequency f5 are equal.
  • the first element 51 and the second element 52, and the third element 91 and the fourth element 92 can have the same electrical length.
  • the electrical length of the first element 51 and the second element 52 may be ⁇ / 4
  • the electrical length of the third element 91 and the fourth element 92 may be ⁇ / 4.
  • FIG. 2 is a perspective view showing a specific configuration of the antenna device 1 according to the present embodiment.
  • first, second radio circuits 2, 6 and first, second are formed on the surface side of a substrate 14 comprising a rectangular plate-like dielectric 12 and a metal plate 13 laminated on the upper and lower surfaces of the right end portion thereof.
  • Feeders 3 and 7 are mounted, and first and second antenna elements 5 and 9 are patterned on the exposed portion of the dielectric 12 on the surface side of the substrate 14.
  • the first and second power feeding portions 3 and 7 and the base end portions of the first and second antenna elements 5 and 9 (the connecting portion of the two elements is referred to as the base end portion).
  • the first and second matching circuit sections 4 and 8 are mounted therebetween.
  • a desired frequency that is, the first frequency f1
  • Resonance is generated on the low frequency side and the high frequency side.
  • FIG. 3A shows the frequency characteristic (two-dot chain line) of the real part (Re) of the Y12 component (mS) of the admittance matrix and the frequency characteristic of the imaginary part (Im) of the Y12 component (mS) of the admittance matrix ( (Solid line).
  • the second frequency f2 of the first element 51 and the fourth frequency f4 of the third element 91 both have the same resonance frequency.
  • the third frequency f3 of the second element 52 and the fifth frequency f5 of the fourth element 92 both have the same resonance frequency.
  • the lengths of the elements 51, 52, 91, 92 of the first antenna element 5 and the second antenna element 9 are finely adjusted, and at a desired frequency, ⁇ 10 mS ⁇ Re (Y12) ⁇ + 10 mS and ⁇ 5 mS ⁇ Im ( Y12) ⁇ + 5 mS.
  • (B) of FIG. 3 is a frequency characteristic of the S parameter (S12) representing the coupling.
  • the real part (Re) of the Y12 component (mS) of the admittance matrix is substantially 0 (zero) at the first frequency f1
  • the imaginary of the Y12 component (mS) of the admittance matrix is substantially 0 (zero) at the first frequency f1.
  • the real part of the Y12 component (mS) of the admittance matrix becomes substantially 0 (zero) at the first frequency f1, and the admittance
  • the imaginary part of the Y12 component (mS) of the matrix is substantially 0 (zero).
  • FIG. 4 is a diagram showing an expression of the Y12 component of the admittance matrix.
  • ⁇ is amplitude
  • ⁇ is phase
  • e is the base of natural logarithm.
  • FIG. 5 is a schematic diagram showing a basic configuration of an example in which the difference in branch element length is increased in each of the first antenna element 5 and the second antenna element 9.
  • the second element 52 of the first antenna element 5 is lengthened, the first element 51 is shortened to increase the difference, the third element 91 of the second antenna element 9 is shortened, and the fourth element The element 92 is lengthened to increase the difference.
  • the fourth element The element 92 is lengthened to increase the difference.
  • the tip portions of the second element 52 and the fourth element 92 are bent inward at right angles.
  • the first and second radio circuits 2 and 6 and the first and second matching circuit units 4 and 8 are omitted.
  • FIGS. 6A and 6B are diagrams showing frequency characteristics when the difference in branch element length is increased in each of the first antenna element 5 and the second antenna element 9.
  • FIG. 6A shows the frequency characteristic (two-dot chain line) of the real part (Re) of the Y12 component (mS) of the admittance matrix and the frequency characteristic of the imaginary part (Im) of the Y12 component (mS) of the admittance matrix ( (B) in FIG. 6 is a frequency characteristic of the S parameter (S12) representing the coupling.
  • FIG. 6B it can be seen that the S parameter (S12) representing the coupling at the first frequency f1 has a wider bandwidth than the case of FIG. You can see)
  • the first antenna element 5 is electrically connected to the first element 51 having the electrical length of ⁇ / 4 at the second frequency f2 and the third frequency f3.
  • the second element 52 having a length of 3 ⁇ / 4 has a two-branch shape, the first element 51 and the second element 52 are electrically connected in the vicinity of the first power feeding unit 3, and the first power feeding unit 3 is connected to the second frequency. It is connected to the first antenna element 5 via the first matching circuit section 4 to be matched at f2, the second frequency f2 is set to be higher than the first frequency f1, and the first frequency f1 is set to the third frequency f3.
  • the second antenna element 9 has a higher frequency
  • the second element 9 has a third element 91 having an electrical length of ⁇ / 4 at the fourth frequency f4 and a second element 92 having an electrical length of 3 ⁇ / 4 at the fifth frequency f5.
  • the third shape Element 91 and fourth element 92 are electrically connected in the vicinity of second power feeding portion 7, and second antenna element 9 is passed through second matching circuit portion 8 for matching second power feeding portion 7 at fourth frequency f4.
  • the fourth frequency f4 is higher than the first frequency f1, and the first frequency f1 is higher than the fifth frequency f5, so that the first and second antenna elements 5 and 9 are connected to each other.
  • the first and first antennas can be connected without separating the antenna elements 5 and 9 using lumped constant components (components for reducing the coupling between the first and second antenna elements 5 and 9).
  • the low coupling between the two antenna elements 5 and 9 can be achieved.
  • the 1st, 2nd antenna elements 5 and 9 can be arrange
  • the first and second antenna elements 5 and 9 are arranged in parallel to the longitudinal direction of the substrate 14, and the first element 51 and the third element 91 have the same electrical length.
  • the second element 52 and the fourth element 92 have the same electrical length, the invention is not limited to such a branched structure, and various patterns are conceivable. Hereinafter, various modified examples having different patterns will be described.
  • FIG. 7 is a perspective view showing a specific configuration of an antenna device 20 which is a modified example 1-1 of the antenna device 1 of FIG.
  • the antenna device 20 of Modification 1-1 has first and second antenna elements 5B and 9B arranged in the short direction of the substrate 14.
  • the branch structures of the first and second antenna elements 5B and 9B are the same as those of the antenna device 1 of FIG. That is, the first antenna element 5B includes a first element 51B and a second element 52B, and the second antenna element 9B includes a first element 91B and a second element 92B. Even with such a branched structure, the same effect as the antenna device 1 of FIG. 1 can be obtained.
  • FIG. 8 is a perspective view showing a specific configuration of an antenna device 21 which is a modified example 1-2 of the antenna device 1 of FIG.
  • the antenna device 21 of Modification 1-2 employs a structure in which the longer element is branched from the middle of the shorter element. That is, in the first antenna element 5C, the second element 52C is branched from the middle of the first element 51C, and in the second antenna element 9C, the fourth element 92C is branched from the middle of the third element 91C. Yes. Even with such a branched structure, the same effect as the antenna device 1 of FIG. 1 can be obtained.
  • FIG. 9 is a perspective view showing a specific configuration of an antenna device 22 which is a modified example 1-3 of the antenna device 1 of FIG.
  • an antenna device 22 of Modification 1-3 has first and second antenna elements 5D and 9D arranged in the short direction of the substrate 14, and further, the antenna device of Modification 1-2 described above.
  • a structure in which the longer element is branched from the middle of the shorter element is employed. That is, in the first antenna element 5D, the second element 52D is branched from the middle of the first element 51D, and in the second antenna element 9D, the fourth element 92D is branched from the middle of the third element 91D. Yes. Even with such a branched structure, the same effect as the antenna device 1 of FIG. 1 can be obtained.
  • FIG. 10 is a perspective view showing a specific configuration of an antenna device 23 which is a modified example 1-4 of the antenna device 1 of FIG.
  • an antenna device 23 of Modification 1-4 is obtained by replacing the first antenna element 5 of the antenna device 1 according to Embodiment 1 (see FIG. 2) with a commercially available chip antenna 16. Even if the first antenna element 5 is replaced with the chip antenna 16, the same effect as the antenna device 1 of FIG. 1 can be obtained.
  • FIG. 11 is a perspective view showing a specific configuration of an antenna device 24 which is a modified example 1-5 of the antenna device 1 of FIG.
  • an antenna device 24 of Modification 1-5 is obtained by replacing the first antenna element 5B of the antenna device 20 of Modification 1-1 (see FIG. 7) with a commercially available chip antenna 16.
  • the arrangement direction of the chip antenna 16 is the short direction of the substrate 14 as in the arrangement direction of the first antenna element 5B. Even if the first antenna element 5B is replaced with the chip antenna 16, the same effect as the antenna device 1 of FIG. 1 can be obtained.
  • FIG. 12 is a perspective view showing a specific configuration of an antenna device 25 which is a modified example 1-6 of the antenna device 1 of FIG.
  • an antenna device 25 of Modification 1-6 is obtained by replacing the first antenna element 5C of the antenna device 21 of Modification 1-2 (see FIG. 8) with a commercially available chip antenna 16.
  • the arrangement direction of the chip antenna 16 is the longitudinal direction of the substrate 14 similarly to the arrangement direction of the first antenna element 5C. Even if the first antenna element 5C is replaced with the chip antenna 16, the same effect as the antenna device 1 of FIG. 1 can be obtained.
  • FIG. 13 is a perspective view showing a specific configuration of an antenna device 26 which is a modified example 1-7 of the antenna device 1 of FIG.
  • an antenna device 26 of Modification 1-7 is obtained by replacing the first antenna element 5D of the antenna device 22 of Modification 1-3 described above (see FIG. 9) with a commercially available chip antenna 16.
  • the arrangement direction of the chip antenna 16 is the short direction of the substrate 14 in the same manner as the arrangement direction of the first antenna element 5D. Even if the first antenna element 5D is replaced with the chip antenna 16, the same effect as the antenna device 1 of FIG. 1 can be obtained.
  • FIG. 14 is a perspective view showing a specific configuration of an antenna device 27 which is a modified example 1-8 of the antenna device 1 of FIG.
  • an antenna device 27 of Modification 1-8 is configured such that each of the second element 52 and the fourth element 92 of the antenna device 1 (see FIG. 2) according to Embodiment 1 described above has a meander shape. is there.
  • “5E” for the first antenna element “51E” for the first element, “52E” for the second element, and “9E” for the second antenna element.
  • “91E” is attached to the third element
  • “92E” is attached to the fourth element.
  • the electrical lengths of the second element 52E and the fourth element 92E are longer than the electrical lengths of the second element 52 and the fourth element 92 of the antenna device 1, respectively. Even if each of the second element 52E and the fourth element 92E has a meander shape, the same effect as the antenna device 1 of FIG. 1 can be obtained.
  • FIG. 15 is a perspective view showing a specific configuration of an antenna device 28 which is a modified example 1-9 of the antenna device 1 of FIG.
  • the antenna device 28 of Modification 1-9 has a meander shape in each of the second element 52C and the fourth element 92C of the antenna device 21 (see FIG. 8) of Modification 1-2. is there.
  • “5F” for the first antenna element “51F” for the first element, “52F” for the second element, and “9F” for the second antenna element.
  • “91F” is attached to the third element
  • “92F” is attached to the fourth element.
  • the electrical lengths of the second element 52F and the fourth element 92F are longer than the electrical lengths of the second element 52C and the fourth element 92C of the antenna device 21, respectively. Even if each of the second element 52F and the fourth element 92F has a meander shape, the same effect as the antenna device 1 of FIG. 1 can be obtained.
  • FIG. 16 is a perspective view showing a specific configuration of an antenna device 29 which is a modified example 1-10 of the antenna device 1 of FIG.
  • an antenna device 29 of Modification 1-10 is configured so that the length of the first antenna element 5 of the antenna device 1 according to Embodiment 1 (see FIG. 2) is shorter than that of the second antenna element 9. It is asymmetrical. That is, the length of the first element 51 of the first antenna element 5 is shorter than the length of the third element 91 of the second antenna element 9, and the length of the second element 52 of the first antenna element 5 is set to the second antenna element. 9 is made shorter than the length of the fourth element 92.
  • “5G” is attached to the first antenna element
  • 51G is attached to the first element
  • 52G is attached to the second element.
  • the second frequency f2 and the fourth frequency f4 become different values (f2 ⁇ f4), Further, since the third frequency f3 and the fifth frequency f5 have different values (f3 ⁇ f5), there are four resonance points. However, there is no change in the first frequency f1.
  • four resonance points are obtained. The obtained effect is the same as that of the antenna device 1 of FIG. .
  • FIG. 17 is a perspective view showing a specific configuration of an antenna device 30 which is a modified example 1-11 of the antenna device 1 of FIG.
  • the antenna device 30 of Modification 1-11 includes the second antenna element 9 of the antenna device 1 (see FIG. 2) according to Embodiment 1 described above and the antenna device of Modification 1-1 described above.
  • first antenna elements 5B are combined to be asymmetric in different directions. That is, the second antenna element 9 is arranged in the longitudinal direction of the substrate 14 and the first antenna element 5B is arranged in the short direction of the substrate 14.
  • the lengths of the first element 51B, the second element 52B, the third element 91, and the fourth element 92 are the same as those of the antenna device 30 of Modification 1-11. Since they are different, there are four resonance points. However, the first frequency f1 does not change. By changing the length of each of the first element 51B, the second element 52B, the third element 91, and the fourth element 92, four resonance points are obtained. The obtained effect is the same as that of the antenna device 1 of FIG. .
  • FIG. 18 is a perspective view showing a specific configuration of an antenna device 31 which is a modified example 1-12 of the antenna device 1 of FIG.
  • an antenna device 31 of Modification 1-12 has a length of the first antenna element 5C of the antenna device 21 of Modification 1-2 described above (see FIG. 8) shorter than that of the second antenna element 9C. It is asymmetrical. That is, the length of the first element 51C of the first antenna element 5C is shorter than the length of the third element 91C of the second antenna element 9C, and the length of the second element 52C of the first antenna element 5C is set to the second antenna element. This is shorter than the length of the 9C fourth element 92C.
  • “5H” is attached to the first antenna element
  • 51H is attached to the first element
  • 52H is attached to the second element.
  • the third frequency f3 and the fifth frequency f5 become different values (f3 ⁇ f5), Further, since the second frequency f2 and the fourth frequency f4 have different values (f2 ⁇ f4), there are four resonance points. However, there is no change in the first frequency f1.
  • four resonance points are obtained, but the obtained effect is the same as that of the antenna device 1 of FIG. .
  • FIG. 19 is a perspective view showing a specific configuration of an antenna device 32 which is a modified example 1-13 of the antenna device 1 of FIG.
  • an antenna device 32 includes a second antenna element 9C of the antenna device 21 (see FIG. 8) which is the above-described modification example 1-2, and an antenna device 22 (see FIG. 9) which is the above-described modification example 1-3. )
  • the first antenna element 5D Of the first antenna element 5D to make the directions different asymmetrical. That is, the second antenna element 9C is arranged in the longitudinal direction of the substrate 14, and the first antenna element 5D is arranged in the short direction of the substrate 14.
  • the antenna device 29 see FIG.
  • the antenna device 32 of Modification 1-13 also includes the first element 51D, the second element 52D, the third element 91C, and the fourth element 92C. Since each length is different, there are four resonance points. However, there is no change in the first frequency f1. By changing the length of each of the first element 51D, the second element 52D, the third element 91C, and the fourth element 92C, four resonance points are obtained. The obtained effect is the same as that of the antenna device 1 of FIG. .
  • FIG. 20 is a schematic diagram showing a basic configuration of an antenna apparatus according to Embodiment 2 of the present invention.
  • the radio circuit and the matching circuit unit are omitted, but these are the same as those of the antenna device 1 according to the first embodiment described above.
  • the antenna device 40 includes first and second antenna elements 41 and 42 having a three-branch structure.
  • the first antenna element 41 includes a first element 410, a second element 411, and a third element 412
  • the second antenna element 42 includes a fourth element 420, a fifth element 421, and a sixth element 422. Yes.
  • the length relationship of each element is such that the first element 410 ⁇ the second element 411 ⁇ the third element 412, and the second antenna element 42 has the fourth element 420 ⁇ The fifth element 421 ⁇ the sixth element 422. In this case, when the difference in element length is increased, the band is widened, and when it is decreased, the band is narrowed.
  • the difference in length between the first element 410 and the second element 411 and the fourth element 420 and the fifth element 421 is large, and the second element 411 and the third element 412 and The difference in length between the fifth element 421 and the sixth element 422 is reduced.
  • FIG. 21 is a perspective view showing a specific configuration of the antenna device 40 according to the present embodiment.
  • first and second radio circuits 2 and 6 and first and second power feeding units 3 and 7 are mounted on the surface of the substrate 14 on the metal plate 13 side.
  • the first and second antenna elements 41 and 42 are patterned on the surface of the dielectric 12 constituting the substrate 14 in the longitudinal direction of the substrate 14.
  • the first and second matching circuit portions 4 and 8 are provided between the first and second feeding portions 3 and 7 and the base end portions of the first and second antenna elements 41 and 42. Has been implemented.
  • FIG. 22 (a) and 22 (b) are diagrams illustrating frequency characteristics of the antenna device 40 according to the present embodiment.
  • (A) of the same figure is a frequency characteristic of the real part (Re) of Y12 component (mS) of an admittance matrix.
  • (b) of the figure is a frequency characteristic of the imaginary part (Im) of the Y12 component (mS) of the admittance matrix.
  • FIG. 23 is a diagram in which the frequency characteristics of (a) and (b) of FIG. 22 are superimposed.
  • the second frequency f2 of the first element 410 and the fifth frequency f5 of the fourth element 420 are both the same resonance frequency
  • the third frequency f3 of the second element 411 and the sixth frequency f5 of the fifth element 421 are the same.
  • Both the frequencies f6 have the same resonance frequency
  • the fourth frequency f4 of the third element 412 and the seventh frequency f7 of the sixth element 422 both have the same resonance frequency.
  • FIG. 24 is a diagram showing the frequency characteristics of the S parameter (S12) representing coupling.
  • the real part (Re) of the Y12 component (mS) of the admittance matrix is substantially equal to the first frequency f1 (1.5 GHz) and two frequencies of 2.5 GHz. 0 (zero, mS). That is, the real part (Re) of the Y12 component (mS) of the admittance matrix becomes approximately 0 (zero) at two frequencies of 1.5 GHz and 2.5 GHz of the first frequency f1.
  • Im (Y12) 0 is obtained only by the antenna shape.
  • the three-branch structure can cope with a reduction in coupling between two frequencies (1.5 GHz and 2.5 GHz).
  • FIGS. 25A and 25B are diagrams showing conditions of the real part (Re) and imaginary part (Im) of the Y12 component (mS) of the admittance matrix, and FIG. 25A shows the condition of the real part (Re).
  • (B) are conditions for the imaginary part (Im).
  • the real part (Re) needs to satisfy ⁇ 10 mS ⁇ Re (Y12) ⁇ + 10 mS
  • the imaginary part (Im) needs to satisfy the condition ⁇ 5 mS ⁇ Im (Y12) ⁇ + 5 mS. There is. By satisfying these conditions, the coupling between the first antenna element 41 and the second antenna element 42 can be reduced.
  • FIG. 26 is a perspective view showing a specific configuration of an antenna device 43 which is a modified example 2 of the antenna device 40 of FIG.
  • the antenna device 43 of Modification 2 in the first antenna element 41B, the second element 411B branches from the middle of the first element 410B, and further the third element 412B branches from the middle of the second element 411B.
  • the second antenna element 42B employs a three-branch structure in which the fifth element 421B branches from the middle of the fourth element 420B, and the sixth element 422B branches from the middle of the fifth element 421B. . Even with such a three-branch structure, the same effect as the antenna device 1 of FIG. 1 can be obtained.
  • FIG. 27 is a perspective view showing an overview of a portable wireless terminal using the antenna device 1 according to the first embodiment.
  • the first antenna element 5 and the second antenna element 9 are arranged close to each other in the lateral direction of the casing at the right corner of the upper portion of the casing.
  • FIG. 28 is a perspective view showing an overview of a portable wireless terminal using the antenna device 20 (see FIG. 7) of Modification 1-1.
  • the first antenna element 5B and the second antenna element 9B are arranged close to each other at the center of the upper part of the housing.
  • the 1st antenna element 5B and the 2nd antenna element 9B are arrange
  • FIG. 29 is a perspective view showing an overview of a portable wireless terminal using an application example of the antenna device 20 (see FIG. 7) of Modification 1-1.
  • the portable wireless terminal 62 shown in the figure is obtained by reversing the arrangement directions of the first antenna element 5B and the second antenna element 9B of the antenna device 20 of Modification 1-1. That is, the first antenna element 5B and the second antenna element 9B are arranged in the facing direction.
  • the present invention can reduce the coupling between antenna elements in a plurality of antenna elements, and has the effect of improving the efficiency of the antenna and reducing the correlation coefficient. Applicable.
  • Second wireless circuit First matching circuit unit 5 , 5B, 5C, 5D, 5E, 5F, 5G, 5H, 41, 41B First antenna element 6 Second wireless circuit 7 Second feeding unit 8 Second matching circuit unit 9, 9B, 9C, 9D, 9E, 9F, 42, 42B Second antenna element 12 Dielectric 13 Metal plate 14 Substrate 16 Chip antenna 51, 51B, 51C, 51D, 51E, 51F, 51G, 51H, 410, 410B First element 52, 52B, 52C, 52D, 52E, 52F, 52G, 52H, 411, 411B Second element 60, 61, 62 Portable wireless terminal 91, 91B, 91C, 91D, 91E, 91F, 412, 412B 3 element 92,92B, 92C, 92D, 92E, 92F, 420,420B fourth element 421,421B

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

Dispositif d'antenne comprenant : un premier circuit sans fil (2) fonctionnant à une première fréquence (f1); une première unité d'alimentation électrique (3) connectée au premier circuit sans fil (2); une première section de circuit d'adaptation (4) connectée à la première unité d'alimentation électrique (3); un premier élément d'antenne (5) alimenté par la première unité d'alimentation électrique (3), et comportant un premier élément (51) d'une longueur électrique de λ/4 à une deuxième fréquence (f2) et un deuxième élément (52) d'une longueur électrique de 3λ/4 à une troisième fréquence (f3); un second circuit sans fil (6) fonctionnant à la première fréquence (f1); une seconde unité d'alimentation électrique (7) connectée au second circuit sans fil (6); une seconde section de circuit d'adaptation (8) connectée à la seconde unité d'alimentation électrique (7); et un deuxième élément d'antenne (9) alimenté par la seconde unité d'alimentation électrique (7), et comportant un troisième élément (91) d'une longueur électrique de λ/4 à une quatrième fréquence (f4) et un quatrième élément (92) d'une longueur électrique de 3λ/4 à une cinquième fréquence (f5), où f3 < f1 < f2, et f5 < f1 < f4.
PCT/JP2012/007683 2012-01-06 2012-11-29 Dispositif d'antenne WO2013102967A1 (fr)

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JP2012-001309 2012-01-06

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JP2015154471A (ja) * 2014-02-19 2015-08-24 日本アンテナ株式会社 アンテナ装置
WO2020075732A1 (fr) * 2018-10-10 2020-04-16 株式会社フェニックスソリューション Étiquette rf à incorporer dans un pneu, et pneu à étiquette rf
JP2021002254A (ja) * 2019-06-24 2021-01-07 株式会社梅垣ラベルサービス Ｒｆタグラベル及びｒｆタグラベル付きゴム系製品

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TWI738343B (zh) 2020-05-18 2021-09-01 為昇科科技股份有限公司 蜿蜒天線結構

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WO2002089249A1 (fr) * 2001-04-23 2002-11-07 Yokowo Co., Ltd. Antenne a large bande pour communication de service mobile
JP2007300398A (ja) * 2006-04-28 2007-11-15 Ntt Docomo Inc マルチバンドアンテナおよびマルチバンドマルチアンテナ
JP2009267686A (ja) * 2008-04-24 2009-11-12 Panasonic Corp 携帯無線機

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US20130057446A1 (en) * 2010-05-17 2013-03-07 Panasonic Corporation Antenna device and portable wireless terminal equipped with the same

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WO2002089249A1 (fr) * 2001-04-23 2002-11-07 Yokowo Co., Ltd. Antenne a large bande pour communication de service mobile
JP2007300398A (ja) * 2006-04-28 2007-11-15 Ntt Docomo Inc マルチバンドアンテナおよびマルチバンドマルチアンテナ
JP2009267686A (ja) * 2008-04-24 2009-11-12 Panasonic Corp 携帯無線機

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015154471A (ja) * 2014-02-19 2015-08-24 日本アンテナ株式会社 アンテナ装置
WO2020075732A1 (fr) * 2018-10-10 2020-04-16 株式会社フェニックスソリューション Étiquette rf à incorporer dans un pneu, et pneu à étiquette rf
JP2021002254A (ja) * 2019-06-24 2021-01-07 株式会社梅垣ラベルサービス Ｒｆタグラベル及びｒｆタグラベル付きゴム系製品
JP7410488B2 (ja) 2019-06-24 2024-01-10 株式会社Uls Ｒｆタグラベル及びｒｆタグラベル付きゴム系製品

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