Grounded antenna for a wireless communication device and method
DCFirst Claim
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1. A wireless communication device, comprising:
- a substrate;
a wireless communication chip positioned on said substrate;
a ground plane positioned on said substrate;
a first antenna operating at a first operating frequency and electrically coupled to said wireless communication chip by a coupling element, said first antenna also electrically coupled to said ground plane; and
said coupling element being arranged to act as a second antenna at a second operating frequency.
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Abstract
A wireless communication device includes an antenna for wireless communication with a remote interrogator. Several embodiments are disclosed to increase the options available to designers of wireless communication devices. In some embodiments, the antenna is a quarter wavelength long with one end of the antenna being grounded to provide desired impedance matching characteristics. The position of the ground plane relative to the antenna is also varied between embodiments. The connection from a wireless communication chip to the antenna is also varied between embodiments to provide alternate structures.
119 Citations
31 Claims
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1. A wireless communication device, comprising:
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a substrate;
a wireless communication chip positioned on said substrate;
a ground plane positioned on said substrate;
a first antenna operating at a first operating frequency and electrically coupled to said wireless communication chip by a coupling element, said first antenna also electrically coupled to said ground plane; and
said coupling element being arranged to act as a second antenna at a second operating frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of constructing a wireless communication device, comprising:
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creating an ground plane and at least one antenna component from a unitary piece of conductive foil;
creating a chip component comprising a feed line, a chip grounding line, and a wireless communication chip;
wrapping said ground plane and at least one antenna component around a substrate such that an antenna portion of said ground plane and at least one antenna component is positioned on a side opposite that where a ground plane portion of said ground plane and at least one antenna component is positioned; and
wrapping said chip component around said substrate such that the chip is grounded by the chip grounding line and coupled to said antenna component of said ground plane and at least one antenna portion by said feed line. - View Dependent Claims (17, 18, 19)
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20. A wireless communication device, comprising:
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a substrate;
a ground plane positioned on one side of the substrate;
a wireless communication chip electrically connected to said ground plane and proximate thereto;
a first antenna having a first end and a second end, said first end electrically connected to said ground plane, and said second end comprising an open circuit; and
the first antenna coupled to said wireless communication chip by a coupling element arranged to act as a second antenna. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification