Flexible curtain antenna for reading RFID tags

• US 20040004577A1
• Filed: 04/24/2003
• Published: 01/08/2004
• Est. Priority Date: 04/29/2002
• Status: Abandoned Application

• Current Assignee: Marconi Communications, Inc. (Marconi Holdings Company Limited)
• Original Assignee: Marconi Communications, Inc. (Marconi Holdings Company Limited)
• Inventors: Forster, Ian J.
• Application Number:
  US10/422,610
• Publication Number:
  US 20040004577A1
• Time in Patent Office: Days
• US Class Current: 343/866
• CPC Class Codes: G06K 7/10336 the antenna being of the near field type, inductive coil
• CPC Class Codes: H01Q 1/085 Flexible aerials; Whip aerials with a resilient base
• CPC Class Codes: H01Q 1/20 Resilient mountings
• CPC Class Codes: H01Q 1/2216 used in interrogator/reader equipment
• CPC Class Codes: H01Q 1/36 Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewithH01Q1/08, H01Q1/14 take precedence
• 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 1/44 using equipment having another main function to serve additionally as an antenna , e.g. means for giving an antenna an aesthetic aspectH01Q1/27 - H01Q1/34 take precedence
• CPC Class Codes: H01Q 21/06 Arrays of individually energised antenna units similarly polarised and spaced apart
• CPC Class Codes: H01Q 21/061 Two dimensional planar arrays
• CPC Class Codes: H01Q 21/08 the units being spaced along or adjacent to a rectilinear path waveguide fed H01Q21/0037
• CPC Class Codes: H01Q 3/24 varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
• 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

A flexible curtain antenna comprised of one or more panels containing at least one conductor antenna. The conductors in the panels are coupled to a transmission device, such as an interrogation reader, to form an antenna. The panels are attached to a mounting structure. The curtain antenna is designed so that objects can pass through the panels. As objects containing wireless communication devices pass through the panels, the panels come into close proximity to the wireless communication devices on the objects. The interrogation reader uses the panels as antennas to establish communication with the wireless communication devices on the objects to retrieve information about the objects. This information can be further communicated to a reporting system and/or a remote system using either a wired or wireless connection.

Claims

1. A curtain antenna capable of communicating with a wireless communication device on an object passing through the antenna, comprising:

a horizontal mounting structure; and

a plurality of panels containing an antenna and hanging from said mounting structure and capable of moving in any direction in a conical area relative to said mounting structure;

said at least one of said plurality of panels is capable of communicating with the wireless communication device and moving about the object as it passes through said plurality of panels.

2. The antenna of claim 1, wherein at least one of said plurality of panels comprises a pole antenna.

3. The antenna of claim 1, wherein at least one of said plurality of panels comprises a slot antenna.

4. The antenna of claim 2, wherein said pole antenna comprises a loop antenna.

5. The antenna of claim 4, wherein said loop antenna has one turn.

6. The antenna of claim 4, wherein said loop antenna has a plurality of turns.

7. The antenna of claim 4, wherein said loop antenna is comprised of a link chain.

8. The antenna of claim 4, wherein said loop antenna comprises more than one loop antenna.

9. The antenna of claim 1, wherein said plurality of panels is comprised of plastic.

10. The antenna of claim 1, wherein said plurality of panels are substantially transparent.

11. The antenna of claim 1, wherein said plurality of panels comprises four or more panels.

12. The antenna of claim 1, wherein said antenna is tuned to radiate energy at frequencies comprised from the group consisting of around about 125 kHz, around about 13.56 MHz, and around about 2.45 GHz.

13. The antenna of claim 1, further comprising a left vertical structure attached to the left side of the horizontal mounting structure and a right vertical structure attached to the right side of the horizontal mounting structure to form a portal for the objects to pass through.

122. The method of claim 118, further comprising reporting information about said wireless communication device interrogated by said interrogation reader to a reporting system.

123. The method of claim 122, further comprising reporting said information from said reporting system to a remote system.

14. A curtain antenna capable of communicating with a wireless communication device on an object passing through the antenna, comprising:

a mounting structure;

a plurality of wedge-shaped panels attached to said mounting structure wherein each of said plurality of wedge-shaped panels contain an antenna and are interlocked with each other in their resting position; and

wherein at least one of said plurality of panels is capable of communicating with the wireless communication device and moving about the object as it passes through said plurality of panels.

15. The antenna of claim 14, wherein at least one of said plurality of wedge-shaped panels comprises a pole antenna.

16. The antenna of claim 14, wherein at least one of said plurality of wedge-shaped panels comprises a slot antenna.

17. The antenna of claim 15, wherein said pole antenna comprises a loop antenna.

18. The antenna of claim 17, wherein said loop antenna has one turn.

19. The antenna of claim 17, wherein said loop antenna has a plurality of turns.

20. The antenna of claim 17, wherein said loop antenna is comprised of a link chain.

21. The antenna of claim 17, wherein said pole antenna comprises more than one loop antenna.

22. The antenna of claim 14, wherein said plurality of wedge-shaped panels is comprised of plastic.

23. The antenna of claim 14, wherein said plurality of wedge-shaped panels are substantially transparent.

24. The antenna of claim 14, wherein said plurality of wedge-shaped panels comprises four or more panels.

25. The antenna of claim 14, wherein said antenna is tuned to radiate energy at frequencies comprised from the group consisting of around about 125 kHz, around about 13.56 MHz, and around about 2.45 GHz.

26. An interrogation system for interrogating a wireless communication device on an object, comprising:

an antenna, comprising a plurality of panels hanging from a horizontal mounting structure, said plurality of panels capable of moving in any direction in a conical area relative to said horizontal mounting structure; and

an interrogation reader coupled to said antenna to allow at least one of said plurality of panels to communicate with the wireless communication device and move about the object as it passes through said plurality of panels.

27. The system of claim 26, wherein said interrogation reader is adapted to receive communications at more than one frequency from the wireless communication device.

28. The system of claim 26, wherein said interrogation reader detects a mismatch in one of said plurality of panels when the object comes into close proximity to said one of said plurality of panels wherein said interrogation reader communicates with the wireless communication device on the object when said proximity sensor detects the object.

29. The system of claim 26, further comprising a proximity sensor coupled to said interrogation reader wherein said interrogation reader communicates with the wireless communication device on the object when said proximity sensor detects the object.

30. The system of claim 26, wherein at least one of said plurality of panels comprises a pole antenna.

31. The system of claim 26, wherein at least one of said plurality of panels comprises a slot antenna.

32. The system of claim 30, wherein said pole antenna comprises a loop antenna.

33. The system of claim 32, wherein said loop antenna has one turn.

34. The system of claim 32, wherein said loop antenna has a plurality of turns.

35. The system of claim 32, wherein said loop antenna is comprised of a link chain.

36. The system of claim 32, wherein said loop antenna comprises more than one loop antenna.

37. The system of claim 26, wherein said plurality of panels is comprised of plastic.

38. The system of claim 26, wherein said plurality of panels are substantially transparent.

39. The system of claim 26, wherein said plurality of panels comprises eight or more panels.

40. The system of claim 26, wherein said antenna is tuned to radiate energy at frequencies comprised from the group consisting of around about 125 kHz, around about 13.56 MHz, and around about 2.45 GHz.

41. The system of claim 26, wherein the communications received by said plurality of panels from said wireless communication device are multiplexed into said interrogation reader.

42. The system of claim 26, wherein said interrogation reader communicates with said wireless communication device to obtain information about the object.

43. The system of claim 42, wherein said information is comprised from the group consisting of the object size, height, width, metal content, identification, date of manufacture, lot number, and expiration date.

44. The system of claim 26, further comprising a reporting system that receives communication from said interrogation reader interrogated by said interrogation reader from said wireless communication device.

45. The system of claim 44, further comprising a remote system that receives communication regarding said wireless communication device from said reporting system.

46. The system of claim 26, further comprising a remote system that receives communication from said interrogation reader interrogated by said interrogation reader from said wireless communication device.

47. The system of claim 26, further comprising an gas source under control of the interrogation reader that exerts air into said plurality of panels wherein said plurality of panels each contain one or more holes to exert the gas onto the objects as the objects pass through said plurality of panels to reduce force exerted by said plurality of panels on the objects.

48. The system of claim 47, wherein said gas is comprised of air.

49. The system of claim 26, further comprising an insecticide inside said plurality of panels each containing one or more holds that exerts said insecticide onto the objects as the objects pass through said plurality of panels.

50. An interrogation system for interrogating a wireless communication device on an object, comprising:

an antenna, comprising a plurality of wedge-shaped panels attached to a mounting structure wherein each of said wedge-shaped panels contain an antenna and interlock with each other in their resting position; and

an interrogation reader coupled to said antenna to allow at least one of said plurality of panels to communicate with the wireless communication device and move about the object as it passes through said plurality of panels.

51. The system of claim 50, wherein said interrogation reader is adapted to receive communications at more than one frequency from the wireless communication device.

52. The system of claim 50, wherein said interrogation reader detects a mismatch in one of said plurality of wedge-shaped panels when the object comes into close proximity to said one of said plurality of wedge-shaped panels wherein said interrogation reader communicates with the wireless communication device on the object when said proximity sensor detects the object.

53. The system of claim 50, further comprising a proximity sensor coupled to said interrogation reader wherein said interrogation reader communicates with the wireless communication device on the object when said proximity sensor detects the object.

54. The system of claim 50, wherein at least one of said plurality of wedge-shaped panels comprises a pole antenna.

55. The system of claim 50, wherein at least one of said plurality of panels comprises a slot antenna.

56. The system of claim 54, wherein said pole antenna comprises a loop antenna.

57. The system of claim 56, wherein said loop antenna has one turn.

58. The system of claim 56, wherein said loop antenna has a plurality of turns.

59. The system of claim 56, wherein said loop antenna is comprised of a link chain.

60. The system of claim 56, wherein said loop antenna comprises more than one loop antenna.

61. The system of claim 50, wherein said plurality of wedge-shaped panels is comprised of plastic.

62. The system of claim 50, wherein said plurality of wedge-shaped panels are substantially transparent.

63. The system of claim 50, wherein said plurality of wedge-shaped panels comprises eight or more panels.

64. The system of claim 50, wherein said antenna is tuned to radiate energy at frequencies comprised from the group consisting of around about 125 kHz, around about 13.56 MHz, and around about 2.45 GHz.

65. The system of claim 50, wherein the communications received by said plurality of wedge-shaped panels from said wireless communication device are multiplexed into said interrogation reader.

66. The system of claim 50, wherein said interrogation reader communicates with said wireless communication device to obtain information about the object.

67. The system of claim 66, wherein said information is comprised from the group consisting of the object size, height, width, metal content, identification, date of manufacture, lot number, and expiration date.

68. The system of claim 50, further comprising a reporting system that receives communication from said interrogation reader interrogated by said interrogation reader from said wireless communication device.

69. The system of claim 68, further comprising a remote system that receives communication regarding said wireless communication device from said reporting system.

70. The system of claim 50, further comprising a remote system that receives communication from said interrogation reader interrogated by said interrogation reader from said wireless communication device.

71. The system of claim 50, further comprising an gas source under control of the interrogation reader that exerts air into said plurality of wedge-shaped panels wherein said plurality of wedge-shaped panels each contain one or more holes to exert the gas onto the objects as the objects pass through said plurality of wedge-shaped panels to reduce force exerted by said plurality of wedge-shaped panels on the objects.

72. The system of claim 71, wherein said gas is comprised of air.

73. The system of claim 50, further comprising an insecticide inside said plurality of wedge-shaped panels each containing one or more holds that exerts said insecticide onto the objects as the objects pass through said plurality of wedge-shaped panels.

74. A communication system, comprising:

an antenna, comprising a plurality of panels hanging from a mounting structure and capable of moving in any direction in a conical area relative to said mounting structure;

a transportation device containing at least one object containing a wireless communication device; and

an interrogation reader coupled to said antenna to allow at least one of said plurality of panels to communicate with the wireless communication device on said at least one object and move about the object as said transportation device passes through said plurality of panels.

75. The system of claim 74, wherein said transportation device is comprised from the group consisting of an assembly line, forklift truck, a crane, an automobile, and a motorcycle.

76. The system of claim 74, wherein said transportation device comprises a pallet that holds said object that contains said wireless communication device.

77. The system of claim 74, wherein said plurality of panels are capable of communicating with said wireless communication device affixed on any surface of said object.

78. The system of claim 74, wherein said at least one object is comprised from the group consisting of a container, a pallet, a beverage can, and a beer-keg.

79. The system of claim 74, wherein said interrogation reader is adapted to receive communications at more than one frequency from said wireless communication device.

80. The system of claim 74, wherein said antenna is adapted to receive communications at more than one frequency from said wireless communication device.

81. The system of claim 74, wherein said interrogation reader detects a mismatch in one of said plurality of panels when said at least one object comes into close proximity to said one of said plurality of panels wherein said interrogation reader communicates with the wireless communication device on said at least one object when said proximity sensor detects said at least one object.

82. The system of claim 74, further comprising a proximity sensor coupled to said interrogation reader wherein said interrogation reader communicates with said wireless communication device when said proximity sensor detects said object.

83. The system of claim 74, further comprising a reporting system that receives communication from said interrogation reader interrogated by said interrogation reader from said wireless communication device.

84. The system of claim 83, further comprising a remote system that receives communication regarding said wireless communication device from said reporting system.

85. The system of claim 74, further comprising a remote system that receives communication from said interrogation reader interrogated by said interrogation reader from said wireless communication device.

86. A communication system, comprising:

an antenna, comprising a plurality of wedge-shaped panels attached to a mounting structure wherein said wedge-shaped panels each contain an antenna and interlock with each other;

a transportation device containing at least one object containing a wireless communication device; and

an interrogation reader coupled to said antenna to allow at least one of said plurality of panels to communicate with the wireless communication device on said at least one object and move about the object as said transportation device passes through said plurality of panels.

87. The system of claim 86, wherein said transportation device is comprised from the group consisting of an assembly line, a forklift truck, a crane, an automobile, and a motorcycle.

88. The system of claim 86, wherein said transportation device comprises a pallet that holds said object that contains said wireless communication device.

89. The system of claim 86, wherein said plurality of wedge-shaped panels are capable of communicating with said wireless communication device affixed on any surface of said object.

90. The system of claim 86, wherein said at least one object is comprised from the group consisting of a container, a pallet, a beverage can, and a beer-keg.

91. The system of claim 86, wherein said interrogation reader is adapted to receive communications at more than one frequency from said wireless communication device.

92. The system of claim 86, wherein said antenna is adapted to receive communications at more than one frequency from said wireless communication device.

93. The system of claim 86, wherein said interrogation reader detects a mismatch in one of said plurality of wedge-shaped panels when said at least one object comes into close proximity to said one of said plurality of wedge-shaped panels wherein said interrogation reader communicates with the wireless communication device on said at least one object when said proximity sensor detects said at least one object.

94. The system of claim 86, further comprising a proximity sensor coupled to said interrogation reader wherein said interrogation reader communicates with said wireless communication device when said proximity sensor detects said object.

95. The system of claim 86, further comprising a reporting system that receives communication from said interrogation reader interrogated by said interrogation reader from said wireless communication device.

96. The system of claim 95, further comprising a remote system that receives communication regarding said wireless communication device from said reporting system.

97. The system of claim 86, further comprising a remote system that receives communication from said interrogation reader interrogated by said interrogation reader from said wireless communication device.

98. A communication system, comprising:

an antenna, comprising a plurality of wedge-shaped panels attached to said mounting structure wherein each of said plurality of wedge-shaped panels contain an antenna and are interlocked with each other in their resting position;

an object containing a wireless communication device; and

an interrogation reader coupled to said antenna to allow at least one of said plurality of panels to communicate with the wireless communication device on the object and move about the object as said antenna moves through the object.

99. A method of constructing a curtain antenna that is capable of communicating with a wireless communication device on an object that passes through the antenna, comprising the steps of:

placing an antenna inside each of a plurality of panels; and

attaching said plurality of panels to a horizontal mounting structure so that said panels hang down from said mounting structure and so that each of said plurality of panels is capable of moving in any direction in a conical area relative to said mounting structure.

100. The method of claim 99, wherein said placing comprises placing a plurality of loop antennas inside each of said plurality of panels.

101. The method of claim 99, further comprising attaching said horizontal mounting structure on a transportation device.

102. The method of claim 99, further comprising coupling said plurality of panels to an interrogation reader.

103. The method of claim 99, wherein said placing comprises placing a loop antenna with more than one turn inside each of said plurality of panels.

104. The method of claim 103, further comprising a reporting system that receives communication from said interrogation reader interrogated by said interrogation reader from said wireless communication device.

105. The method of claim 104, further comprising a remote system that receives communication regarding said wireless communication device from said reporting system.

106. The method of claim 102, further comprising a remote system that receives communication from said interrogation reader interrogated by said interrogation reader from said wireless communication device.

107. A method of constructing a curtain antenna that is capable of communicating with a wireless communication device on an object that passes through the antenna, comprising the steps of:

placing an antenna inside each of a plurality of wedge-shaped panels; and

attaching said wedge-shaped plurality of panels to a mounting structure so that said panels interlock with each other in their resting position so that each of said plurality of wedge-shaped panels is capable of moving about the object as it passes through said mounting structure.

108. The method of claim 107, wherein said placing comprises placing a plurality of loop antennas inside each of said plurality of wedge-shaped panels.

109. The method of claim 107, further comprising attaching said mounting structure on a transportation device.

110. The method of claim 107, further comprising coupling said plurality of wedge-shaped panels to an interrogation reader.

111. The method of claim 107, wherein said placing comprises placing a loop antenna with more than one turn inside each of said plurality of wedge-shaped panels.

112. A method of communicating with a wireless communication device on an object, comprising:

passing the object through an antenna comprised of a plurality of panels hanging from a horizontal mounting structure wherein said plurality of panels are capable of moving about the object in any direction in a conical area relative to said mounting structure; and

interrogating the wireless communication device on the object as the object passes through said plurality of panels.

113. The method of claim 112, wherein said interrogating comprises interrogating at more than one frequency to communicate with the wireless communication device.

114. The method of claim 112, further comprising sensing the object before interrogating the wireless communication device on the object.

115. The method of claim 112, further comprising multiplexing communications received by said plurality of panels from the wireless communication device.

116. The method of claim 112, further comprising exerting a gas onto the object as it passes through said plurality of panels to reduce the force exerted by said plurality of panels on the object.

117. The method of claim 112, further comprising exerting an insecticide onto the object as it passes through said plurality of panels to protect the object from insects.

118. A method of communicating with a wireless communication device on an object, comprising:

passing the object through an antenna comprised of a plurality of wedge-shaped panels attached to a mounting structure that interlock with each other in their resting position wherein said panels are capable of moving about the object as the object passes through said plurality of wedge-shaped panels; and

interrogating the wireless communication device on the object as the object passes through said plurality of wedge-shaped panels.

119. The method of claim 118, wherein said interrogating comprises interrogating at more than one frequency to communicate with the wireless communication device.

120. The method of claim 118, further comprising sensing the object before interrogating the wireless communication device on the object.

121. The method of claim 118, further comprising multiplexing communications received by said plurality of wedge-shaped panels from the wireless communication device.

124. The method of claim 118, further comprising reporting information about said wireless communication device interrogated by said interrogation reader to a remote system.

125. The method of claim 118, further comprising exerting a gas onto the object as it passes through said plurality of wedge-shaped panels to reduce the force exerted by said plurality of wedge-shaped panels on the object.

126. The method of claim 118, further comprising exerting an insecticide onto the object as it passes through said plurality of wedge-shaped panels to protect the object from insects.

127. A method of communicating with a wireless communication device on an object, comprising:

passing an antenna that is comprised of a plurality of panels hanging from a horizontal mounting structure through the object wherein said plurality of panels are capable of moving about the object in any direction in a conical area relative to said mounting structure; and

interrogating the wireless communication device on the object as said plurality of panels moves through the object.

128. The method of claim 127, further comprising sensing the object before interrogating the wireless communication device on the object.

129. The method of claim 127, further comprising multiplexing communications received by said plurality of panels from the wireless communication device.

130. The method of claim 127, further comprising reporting information about said wireless communication device interrogated by said interrogation reader to a reporting system.

131. The method of claim 130, further comprising reporting said information from said reporting system to a remote system.

132. The method of claim 127, further comprising reporting information about said wireless communication device interrogated by said interrogation reader to a remote system.

133. The method of claim 127, further comprising exerting a gas onto the object as it passes through said plurality of panels to reduce the force exerted by said plurality of panels on the object.

134. The method of claim 127, further comprising exerting an insecticide onto the object as it passes through said plurality of panels to protect the object from insects.

135. A method of communicating with a wireless communication device on an object, comprising:

passing an antenna that is comprised of a plurality of wedge-shaped panels attached to a mounting structure that interlock with each other in their resting position wherein said plurality of wedge-shaped panels are capable of moving about the object as the object passes through said plurality of wedge-shaped panels; and

interrogating the wireless communication device on the object as said plurality of panels moves through the object.

136. The method of claim 135, further comprising sensing the object before interrogating the wireless communication device on the object.

137. The method of claim 135, further comprising multiplexing communications received by said plurality of wedge-shaped panels from the wireless communication device.

138. The method of claim 135, further comprising reporting information about said wireless communication device interrogated by said interrogation reader to a reporting system.

139. The method of claim 138, further comprising reporting said information from said reporting system to a remote system.

140. The method of claim 135, further comprising reporting information about said wireless communication device interrogated by said interrogation reader to a remote system.

141. The method of claim 135, further comprising exerting a gas onto the object as it passes through said plurality of wedge-shaped panels to reduce the force exerted by said plurality of wedge-shaped panels on the object.

142. The method of claim 135, further comprising exerting an insecticide onto the object as it passes through said plurality of wedge-shaped panels to protect the object from insects.