JP4770655B2 - Wireless IC device - Google Patents
Wireless IC device Download PDFInfo
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- JP4770655B2 JP4770655B2 JP2006247267A JP2006247267A JP4770655B2 JP 4770655 B2 JP4770655 B2 JP 4770655B2 JP 2006247267 A JP2006247267 A JP 2006247267A JP 2006247267 A JP2006247267 A JP 2006247267A JP 4770655 B2 JP4770655 B2 JP 4770655B2
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- Prior art keywords
- wireless
- inductance
- electromagnetic coupling
- power supply
- radiation plate
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Description
複数の電磁結合モジュールと、該複数の電磁結合モジュールが搭載されている放射板と、を備え、
前記電磁結合モジュールは、無線ICチップと該無線ICチップに接続され、所定の共振周波数を有する共振回路を含む給電回路を有する給電回路基板とで構成されており、
前記各給電回路基板に設けたそれぞれの共振回路は、共振周波数が互いに異なっていること、
を特徴とする。 In order to achieve the above object, the present invention provides:
A plurality of electromagnetic coupling modules; and a radiation plate on which the plurality of electromagnetic coupling modules are mounted.
The electromagnetic coupling module is connected to the wireless IC chip and the wireless IC chip, which is composed of a feed circuit board having a feed circuit including a resonant circuit having a predetermined resonant frequency,
Resonance circuits provided on the power supply circuit boards have different resonance frequencies,
It is characterized by.
本発明に係る無線ICデバイスの第1実施例を図1及び図2に、第1実施例の変形例を図3に、第2実施例を図4及び図5示す。図1及び図4は無線ICデバイスの平面状態を示し、図2は図1のA−A断面を示し、図5は図4のB−B断面を示している。 (Refer to FIGS. 1 to 5 of the first and second embodiments of the wireless IC device)
1 and 2 show a wireless IC device according to a first embodiment of the present invention, FIG. 3 shows a modification of the first embodiment, and FIGS. 4 and 5 show a second embodiment. 1 and 4 show the planar state of the wireless IC device, FIG. 2 shows the AA cross section of FIG. 1, and FIG. 5 shows the BB cross section of FIG.
図6の斜視図に、電磁結合モジュール1A,1Bにおける無線ICチップ5と給電回路基板10との接続形態を示す。図6(A)は無線ICチップ5の裏面及び給電回路基板10の表面に、それぞれ、入出力端子7a,17aを設けたものである。図6(B)は他の接続形態を示し、無線ICチップ5の裏面及び給電回路基板10の表面に、それぞれ、入出力端子7a,17aに加えて、グランド端子7b,17bを設けたものである。但し、給電回路基板10のグランド端子17bは終端しており、給電回路基板10の他の素子に接続されているわけではない。 (Refer to Fig. 6 for connection form of electromagnetic coupling module)
The perspective view of FIG. 6 shows a connection form between the wireless IC chip 5 and the power supply circuit board 10 in the electromagnetic coupling modules 1A and 1B. In FIG. 6A, input / output terminals 7a and 17a are provided on the back surface of the wireless IC chip 5 and the front surface of the power supply circuit board 10, respectively. FIG. 6B shows another connection mode, in which ground terminals 7b and 17b are provided in addition to the input / output terminals 7a and 17a on the back surface of the wireless IC chip 5 and the front surface of the feeder circuit board 10, respectively. is there. However, the ground terminal 17b of the power feeding circuit board 10 is terminated and is not connected to other elements of the power feeding circuit board 10.
ここで、900MHz帯の高周波信号で動作する電磁結合モジュール1Bの給電回路基板10の詳細な構成を説明する。この給電回路基板10において、図7に等価回路として示すように、給電回路16は互いに磁界結合するインダクタンス素子L1,L2を備え、インダクタンス素子L1はキャパシタンス素子C1a,C1bを介して無線ICチップ5と接続する給電端子19a,19b(図6(A)の入出力端子17a,17aに相当する)に接続され、かつ、インダクタンス素子L1はインダクタンス素子L2とキャパシタンス素子C2a,C2bを介して並列に接続されている。換言すれば、給電回路16は、インダクタンス素子L1とキャパシタンス素子C1a,C1bとからなるLC直列共振回路と、インダクタンス素子L2とキャパシタンス素子C2a,C2bとからなるLC直列共振回路を含んで構成されており、各共振回路は図7のMで示される相互インダクタンスによって結合されている。そして、インダクタンス素子L1,L2の双方が前記放射板51と磁気的に結合している。 (Refer to the first example of the power supply circuit board, FIGS. 7 to 10)
Here, a detailed configuration of the power supply circuit board 10 of the electromagnetic coupling module 1B that operates with a high-frequency signal in the 900 MHz band will be described. In the feeder circuit board 10, as shown as an equivalent circuit in FIG. 7, the feeder circuit 16 includes inductance elements L1 and L2 that are magnetically coupled to each other. The inductance element L1 is connected to the wireless IC chip 5 via the capacitance elements C1a and C1b. The power supply terminals 19a and 19b to be connected (corresponding to the input / output terminals 17a and 17a in FIG. 6A) are connected, and the inductance element L1 is connected in parallel via the inductance element L2 and the capacitance elements C2a and C2b. ing. In other words, the power feeding circuit 16 includes an LC series resonance circuit including an inductance element L1 and capacitance elements C1a and C1b, and an LC series resonance circuit including an inductance element L2 and capacitance elements C2a and C2b. Each resonance circuit is coupled by a mutual inductance indicated by M in FIG. Both the inductance elements L1 and L2 are magnetically coupled to the radiation plate 51.
次に、13.5MHz帯の高周波信号で動作する電磁結合モジュール1Aの給電回路基板10の詳細な構成を説明する。この給電回路基板10において、図11に等価回路として示すように、給電回路16は互いに磁界結合(符号Mで示す)するインダクタンス素子L1,L2を備え、インダクタンス素子L1は一端がキャパシタンス素子C1及び接続用電極131aを介して無線ICチップ5と接続されるとともに、キャパシタンス素子C2を介してインダクタンス素子L2の一端と接続されている。また、インダクタンス素子L1,L2の他端はそれぞれ接続用電極131bを介して無線ICチップ5と接続されている。換言すれば、給電回路16は、インダクタンス素子L1とキャパシタンス素子C1とからなるLC直列共振回路と、インダクタンス素子L2とキャパシタンス素子C2とからなるLC直列共振回路を含んで構成されており、インダクタンス素子L1,L2の双方が前記放射板51と磁気的に結合している。 (Refer to the second example of the power supply circuit board, FIG. 11 and FIG. 12)
Next, a detailed configuration of the power supply circuit board 10 of the electromagnetic coupling module 1A that operates with a high frequency signal in the 13.5 MHz band will be described. In the power supply circuit board 10, as shown as an equivalent circuit in FIG. 11, the power supply circuit 16 includes inductance elements L1 and L2 that are magnetically coupled to each other (indicated by a symbol M), and one end of the inductance element L1 is connected to the capacitance element C1. It is connected to the wireless IC chip 5 via the electrode 131a, and is connected to one end of the inductance element L2 via the capacitance element C2. The other ends of the inductance elements L1 and L2 are connected to the wireless IC chip 5 via connection electrodes 131b, respectively. In other words, the power feeding circuit 16 includes an LC series resonance circuit composed of an inductance element L1 and a capacitance element C1, and an LC series resonance circuit composed of an inductance element L2 and a capacitance element C2, and the inductance element L1. , L2 are magnetically coupled to the radiation plate 51.
なお、本発明に係る無線ICデバイスは前記実施例に限定するものではなく、その要旨の範囲内で種々に変更することができる。 (Other examples)
The wireless IC device according to the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the gist thereof.
5…無線ICチップ
10…給電回路基板
16…給電回路
L1,L2…インダクタンス素子
C1a,C1b,C2a,C2b,C1,C2…キャパシタンス素子
51…放射板
51a…非磁性体層
51b…磁性体層
52…空隙 DESCRIPTION OF SYMBOLS 1A, 1B ... Electromagnetic coupling module 5 ... Wireless IC chip 10 ... Feeding circuit board 16 ... Feeding circuit L1, L2 ... Inductance element C1a, C1b, C2a, C2b, C1, C2 ... Capacitance element 51 ... Radiation plate 51a ... Nonmagnetic material Layer 51b ... Magnetic layer 52 ... Air gap
Claims (10)
- 複数の電磁結合モジュールと、該複数の電磁結合モジュールが搭載されている放射板と、を備え、
前記電磁結合モジュールは、無線ICチップと該無線ICチップに接続され、所定の共振周波数を有する共振回路を含む給電回路を有する給電回路基板とで構成されており、
前記各給電回路基板に設けたそれぞれの共振回路は、共振周波数が互いに異なっていること、
を特徴とする無線ICデバイス。 A plurality of electromagnetic coupling modules; and a radiation plate on which the plurality of electromagnetic coupling modules are mounted.
The electromagnetic coupling module is connected to the wireless IC chip and the wireless IC chip, which is composed of a feed circuit board having a feed circuit including a resonant circuit having a predetermined resonant frequency,
Resonance circuits provided on the power supply circuit boards have different resonance frequencies,
A wireless IC device characterized by the above. - 前記放射板が金属材からなることを特徴とする請求項1に記載の無線ICデバイス。 The wireless IC device according to claim 1, wherein the radiation plate is made of a metal material.
- 前記放射板が非磁性体層と磁性体層とからなることを特徴とする請求項1又は請求項2に記載の無線ICデバイス。 The wireless IC device according to claim 1, wherein the radiation plate includes a nonmagnetic material layer and a magnetic material layer.
- 前記非磁性体層は前記電磁結合モジュールを搭載する側に配置されていることを特徴とする請求項3に記載の無線ICデバイス。 4. The wireless IC device according to claim 3, wherein the non-magnetic layer is disposed on a side on which the electromagnetic coupling module is mounted.
- 前記放射板は前記複数の電磁結合モジュールのうち少なくとも一つと接しないように前記電磁結合モジュールの周囲に環状の空隙を有することを特徴とする請求項4に記載の無線ICデバイス。 The wireless IC device according to claim 4, wherein the radiation plate has an annular gap around the electromagnetic coupling module so as not to contact at least one of the plurality of electromagnetic coupling modules.
- 前記給電回路基板はインダクタンス素子を含む給電回路を備えていることを特徴とする請求項1ないし請求項5のいずれかに記載の無線ICデバイス。 6. The wireless IC device according to claim 1, wherein the power supply circuit board includes a power supply circuit including an inductance element.
- 前記給電回路は前記インダクタンス素子を含む複数の共振回路を備えていることを特徴とする請求項6に記載の無線ICデバイス。 The wireless IC device according to claim 6, wherein the power feeding circuit includes a plurality of resonance circuits including the inductance element.
- 前記複数の共振回路はインダクタンス素子とキャパシタンス素子とで構成されていることを特徴とする請求項7に記載の無線ICデバイス。 The wireless IC device according to claim 7, wherein the plurality of resonance circuits include an inductance element and a capacitance element.
- 前記給電回路基板は複数の非磁性体層又は磁性体層を積層してなる多層基板であり、
前記キャパシタンス素子と前記インダクタンス素子は前記多層基板の表面及び/又は内部に形成されていること、
を特徴とする請求項6ないし請求項8のいずれかに記載の無線ICデバイス。 The feeder circuit board is a multilayer board formed by laminating a plurality of nonmagnetic layers or magnetic layers,
The capacitance element and the inductance element are formed on a surface and / or inside of the multilayer substrate;
The wireless IC device according to claim 6, wherein: - 前記共振回路はコイル状電極で形成されたインダクタンス素子を含むことを特徴とする請求項7ないし請求項9のいずれかに記載の無線ICデバイス。 The wireless IC device according to claim 7, wherein the resonance circuit includes an inductance element formed of a coiled electrode.
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