Tuning techniques for a slot antenna
First Claim
1. A device for identifying a container having a slot, comprising:
- a wireless communication device mounted on the container to communicate remotely information associated with the container;
a slot antenna formed by electronically associating said wireless communication device to the slot; and
a variable reactance element including sub-elements whose proximity changes as a function of changes in a width associated with the slot, thereby changing reactance characteristics of said slot antenna.
3 Assignments
0 Petitions
Accused Products
Abstract
A wireless communication device and method for identifying a container, or communication information about a container, using a slot in the container as an antenna. The device includes a wireless communication device for transmitting information regarding the container. The container includes an outer wall forming a rim and a slot between the rim edge and the outer wall that is circular and continues without boundaries. The wireless communication device is coupled to the slot to provide the slot antenna for communications. An impedance matching network is additionally provided to make the operating frequency of the slot substantially the same as the operating frequency of the wireless communication device. Alternatively, shorting posts may be placed in the slot to define boundaries of the slot to match the operating frequency of the slot to the operating frequency of the antenna. Variable impedance matching is provided between the wireless communication device and the slot.
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Citations
28 Claims
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1. A device for identifying a container having a slot, comprising:
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a wireless communication device mounted on the container to communicate remotely information associated with the container;
a slot antenna formed by electronically associating said wireless communication device to the slot; and
a variable reactance element including sub-elements whose proximity changes as a function of changes in a width associated with the slot, thereby changing reactance characteristics of said slot antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for identifying a container, comprising:
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a container having a slot;
a wireless communication device mounted on the container to communicate remotely information associated with the container;
a slot antenna formed by electronically associating said wireless communication device to said slot, said slot antenna having a variable impedance as a function of a width associated with the slot; and
an impedance matching network including a variable reactance element associated with said wireless communication device, said impedance matching network matching impedances between said slot antenna and said wireless communication device. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method of monitoring a container comprising:
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associating a wireless communication device with the container;
moving the container through at least one interrogation point containing an interrogation reader;
communicating monitoring information associated with the container between said wireless communication device and said interrogation reader through a slot antenna formed by a slot within the container; and
matching impedances between said slot antenna and said wireless communication device with an impedance matching network. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification