Patent ID: 6781508
Filing Date: 2004-08-24
Classification: G01S,G06K,H01Q,Y10T

Abstract:
A method of manufacturing a radio frequency data communications device, for use with a remote interrogator unit, the method comprising:providing an RFID integrated circuit, including a package housing transponder circuitry, and supporting the integrated circuit on a substrate, the integrated circuit being configured to transmit, in response to an interrogation signal from a remote interrogator, a responsive signal which includes identification information; securing an antenna on the substrate external of the transponder circuitry and electrically coupling the antenna to the integrated circuit, the antenna having a length, and a width transverse to the length; purposefully reducing the sensitivity of the transponder circuitry of the integrated circuit by trimming the antenna to reduce the width of at least a portion of a section at a location along the length of the antenna, while the antenna is on the substrate; and supporting a battery from the substrate and coupling the battery to the integrated circuit, wherein reducing the sensitivity of the transponder circuitry comprises setting a range of twenty feet for the transponder circuitry, increasing duration of an interval during which the transponder circuitry is not able to detect a wake-up signal and conserving battery power.