Manufacturing Technique for Passive RFID Tags with Microstrip Antennas

University of Kansas
posted on 01/12/2006

A microstrip WID tag is comprised of an antenna, matching circuit, integrated circuit (IC), substrate, and ground plane. For low manufacturing cost, the antenna, matching circuit, and IC are all on the same plane. The ground plane is separated by the substrate. Using a microstrip antenna, one can construct an RFID tag that works on otherwise difficult-to-tag materials such as metal or water."

Suggested Uses

The initial use of this tag would initially be in items that are traditionally difficult or impossible to tag, such as metal objects. At volume, it could actually be competitive with general-purpose tags. Microstrip antennas can provide higher theoretical performance(since they radiate only in one hemisphere), and probably higher real performance, since they have a ground plane that isolate the antenna from the item being tagged. The tag may find acceptance in mainstream applications as a "universal" tag that works on anything. Companies are always looking for that "universal" tag to simplify their WID implementations, and a cost-effective "universal" tag could sell in very high volumes.

Innovation Details

Detailed Description

A microstrip WID tag is comprised of an antenna, matching circuit, integrated circuit(IC), substrate, and ground plane. For low manufacturing cost, the antenna, matching circuit, and IC are all on the same plane. The ground plane is separated by the substrate.Using a microstrip antenna, one can construct an RFID tag that works on otherwise difficult-to-tag materials such as metal or water.

File Number: KUCR # 2006 FY 09 IT

Other Information: *State of Development* Available for license

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This innovation currently is not available for online licensing. Please contact Keith Braman at University of Kansas for more information.

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