Transponder Comprising an Electronic Memory Chip and Magnetic Circular Antenna

• US 20100052859A1
• Filed: 06/21/2007
• Published: 03/04/2010
• Est. Priority Date: 06/21/2006
• Status: Abandoned Application

• Current Assignee: DYNAMIC Systems GmbH
• Original Assignee: DYNAMIC Systems GmbH
• Inventors: Lossau, Harald
• Application Number:
  US12/305,435
• Publication Number:
  US 20100052859A1
• Time in Patent Office: Days
• US Class Current: 340/10.100
• CPC Class Codes: G06K 19/07749 the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
• CPC Class Codes: G06K 19/0776 the adhering arrangement being a layer of adhesive, so that the record carrier can function as a sticker
• CPC Class Codes: G06K 19/07786 the antenna being of the HF type, such as a dipole
• CPC Class Codes: H01Q 1/2208 associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems methods or arrangements for sensing record carriers, e.g. for reading patterns G06K7/00; record carrier for use with machines and with at least a part designed to carry digital markings G06K19/00
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

Abstract

In a transponder having an electronic memory chip and a magnetic ring antenna is provided that the ring antenna comprises an electrically conductive coil having at least one turn, and a capacitor, wherein the capacitor exhibits, as a dielectric, a thin insulator foil that simultaneously serves as a substrate foil for the coil and/or the chip.

Claims

1-49. -49. (canceled)

50. A transponder having an electronic memory chip and a magnetic ring antenna, wherein

the ring antenna comprises an electrically conductive coil having only one turn, and a capacitor, and

the transponder is configured for an operating frequency of at least 860 MHz for UHF or the microwave range.

51. The transponder according to claim 50, further comprising

a secondary antenna electrically coupled to the ring antenna via an insulator foil, wherein

the secondary antenna forms a dipole, patch or slot antenna.

52. The transponder according to claim 51, wherein the secondary antenna is electrically coupled to the ring antenna via substrate foil of the ring antenna.

53. The transponder according to claim 51, wherein the secondary antenna is present on a secondary-antenna substrate foil, and is electrically coupled to the ring antenna via the secondary-antenna substrate foil.

54. The transponder according to claim 51, wherein the insulator foil is a plastic foil, a polyester (PET) foil, a polyimide foil or a polypropylene (PP) foil.

55. The transponder according to claim 51, wherein the secondary antenna is formed by a gap in an otherwise contiguous metal layer.

56. The transponder according to claim 55, wherein the secondary antenna is formed by etching the gap out of a contiguous metal foil.

57. The transponder according to claim 55, wherein the secondary antenna is formed by printing a conductive paste.

58. The transponder according to claim 50, wherein the secondary antenna is part of an object to be marked.

59. The transponder according to claim 50, wherein the inductance of the coil is less than 1 μ

H and the circumference of the coil is less than 20 cm.

60. The transponder according to claim 50, wherein the capacity of the capacitor is selected from the range 0.1 pF to 20 pF, preferably from the range 0.5 pF to 5 pF.

61. The transponder according to claim 50, wherein the coil area A is less than 40 cm².

62. The transponder according claim 50, further comprising an adhesive layer for use with the transponder as a self-adhesive transponder label.

63. The transponder according to claim 50, wherein the coil is formed by a circuit path on a substrate foil.

64. The transponder according to claim 63, wherein the circuit path is formed by etching out of a contiguous metal foil or by printing a conductive paste.

65. A method for manufacturing a transponder, comprising:

providing and coupling an electronic memory chip with a magnetic ring antenna, which comprises an electrically conductive coil having only one turn, and a capacitor,

wherein the transponder is configured for an operating frequency of at least 860 MHz for UHF or the microwave range.

66. The method of claim 65, further comprising:

providing a secondary antenna that forms a dipole, patch or slot antenna, and

joining the transponder and the secondary antenna in such a way that the secondary antenna and the ring antenna are electrically coupled via an insulator foil.

67. The method according to claim 65, further comprising applying a transponder component electrically joined with the coil by welding or bonding.

68. The method according to claim 67, wherein the transponder component is applied such that it is coupled directly without a bridge to both ends of the coil.

69. The method according to claim 65, further comprising providing the transponder with a protective layer.

70. The method according to claim 69, further comprising forming the protective layer by an applied lacquer or plastic layer, or an appropriately comprehensive protective body.

71. A transponder having an electronic memory chip and a magnetic ring antenna, wherein

the ring antenna comprises an electrically conductive coil having at least one turn, and a capacitor, and wherein

the capacitor exhibits, as a dielectric, a thin insulator foil that simultaneously serves as a substrate foil for the coil and/or the chip, and

the transponder further comprises a secondary antenna that is electrically coupled to the ring antenna via an insulator foil, wherein

the secondary antenna forms a dipole, patch or slot antenna.

72. The transponder according to claim 71, wherein the insulator foil is a plastic foil, a polyester (PET) foil, a polyimide foil or a polypropylene (PP) foil.

73. The transponder according to claim 71, wherein the entire transponder is assembled on the insulator foil.

74. The transponder according to claim 71, wherein the coil and the memory chip are assembled on opposing surfaces of the insulator foil.

75. The transponder according to claim 71, further comprising a second insulator foil joined with the first insulator foil in such a way that the coil is wrapped between the two insulator foils.

76. The transponder according to claim 71, wherein the secondary antenna is electrically coupled to the ring antenna via the substrate foil of the ring antenna.

77. The transponder according to claim 71, wherein the secondary antenna is present on a secondary-antenna substrate foil, and is electrically coupled to the ring antenna via this secondary-antenna substrate foil.

78. The transponder according to claim 71, wherein the secondary antenna is present on a secondary-antenna substrate foil in the form of a plastic foil, a polyester (PET) foil, a polyimide foil or a polypropylene (PP) foil.

79. The transponder according to claim 71, wherein the secondary antenna is formed by a gap in an otherwise contiguous metal layer.

80. The transponder according to claim 79, the secondary antenna is formed by etching the gap out of a contiguous metal foil.

81. The transponder according to claim 79, wherein the secondary antenna is formed by printing a conductive paste.

82. The transponder according to claim 71, wherein the secondary antenna is part of an object to be marked.

83. The transponder according to claim 71, wherein the transponder is configured for an operating frequency above 10 MHz.

84. The transponder according to claim 71, wherein the thickness of the insulator foil serving as a dielectric is below about 50 μ

m.

85. The transponder according to claim 71, wherein the transponder is functional in the case of a planar insulator foil serving as a dielectric, and the antenna coil is arranged parallel to the insulator foil.

86. The transponder according to claim 71, wherein the insulator foil serving as a dielectric does not lie parallel to the area spanned by the antenna, but rather protrudes out from it.

87. The transponder according to claim 86, wherein the insulator foil serving as a dielectric is rolled up to form a closed tube along whose circumference the coil runs.

88. The transponder according to claim 86, wherein the circuit paths are formed such that the resonance frequency of the antenna does not shift due to positioning imprecisions when rolling up.

89. The transponder according to claim 86, wherein the circuit paths are formed such that, when rolling up, the resonance frequency of the transponder can be tuned through specific positioning of the sub-regions lying on top of one another.

90. The transponder according to claim 71, wherein the coil area A is less than 40 cm².

91. The transponder according to claim 71, wherein an adhesive layer is provided for the use of the transponder as a self-adhesive transponder label.

92. The transponder according to claim 71, wherein the coil is formed by a circuit path on a substrate foil.

93. The transponder according to claim 92, wherein the circuit path is formed by etching out of a contiguous metal foil or by printing a conductive paste.

94. The transponder according to claim 71, in which the number of turns of the coil is less than 20.

95. A method for manufacturing a transponder, comprising:

providing a transponder, having an electronic memory chip and a magnetic ring antenna, that is applied on a thin insulator foil,

providing a secondary antenna that forms a dipole, patch or slot antenna, preferably on a secondary-antenna substrate foil, and

joining the transponder and the secondary antenna in such a way that the secondary antenna and the ring antenna are electrically coupled via the thin insulator foil and/or the secondary-antenna substrate foil.

96. The method according to claim 95, further comprising providing the secondary antenna as part of an object to be marked.

97. The method according to claim 95, further comprising coupling an electronic memory chip with a magnetic ring antenna, wherein the ring antenna is developed having an electrically conductive coil having at least one turn and having a capacitor, and wherein the transponder is designed for an operating frequency of at least 860 MHz for UHF or the microwave range.

98. The method according to claim 95, further comprising applying a transponder component electrically joined with the coil by welding or bonding.

99. The method according to claim 98, wherein the coil comprises only one turn, and the transponder component is applied such that it is coupled directly without a bridge to both ends of the coil.

100. The method according to claim 95, further comprising providing the transponder with a protective layer.

101. The method according to claim 100, further comprising forming the protective layer by an applied lacquer or plastic layer, or an appropriately comprehensive protective body.