Patent
Radio frequency identification transponder having a high gain antenna configuration
Michael John Brady,Dah-Weih Duan,Venkata Kodukula,Rene D. Martinez,Paul A. Moskowitz,Philip Murphy +5 more
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TLDR
In this paper, a radio frequency identification transponder has a high gain antenna for increased range and a horn antenna providing increased gain and directivity, while a patch antenna provides increased gain, and circular polarization.Abstract:
A radio frequency identification transponder has a high gain antenna for increased range. In an embodiment, the radio frequency transponder has a reflector to increase its operative range. A system of one or more reflectors is operatively associated with a transponder and may be formed out of any sort of radio frequency reflective material. The reflector system can enhance reception or transmission of radio waves by or from the transponder. The reflector system may also be used to provide for selective coupling of the radio frequency transponder with a base station, user- or vehicle-supported reader, or the like based on relative orientation. In addition, the reflector system may be used to selectively reflect particular radio waves. In another embodiment, the radio frequency transponder has a horn antenna providing increased gain and directivity. In yet another embodiment, the radio frequency transponder has a patch antenna providing increased gain and circular polarization. The patch antenna may further comprise a patch antenna array, a multi-layer patch or a dipole comprised of patch elements.read more
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References
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Patent
Radio frequency circuit and memory in thin flexible package
TL;DR: In this paper, a thin and flexible radio frequency (RF) tag that comprises a semiconductor circuit that has logic, memory, and radio frequency circuits, connected to an antenna with all interconnections placed on a single plane of wiring without crossovers.
Patent
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Michael John Brady,Thomas Anthony Cofino,Harley Kent Heinrich,Glen Walden Johnson,Paul A. Moskowitz,George Frederick Walker +5 more
TL;DR: In this article, a sensor system (1000) comprises a tag (100) consisting of at least one radio-frequency chip (130) having a memory element, an antenna (140) disposed in electrical communication with output terminals of the chip and a non-conductive coating (115) disposed upon a surface of the tag.
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