Rfid near field meanderline-like microstrip antenna

Details Rfid near field meanderline-like microstrip antenna Rfid near field meanderline-like microstrip antenna

H - Electricity

01

Q

H01Q 1/36 (2006.01) H01Q 1/22 (2006.01) H01Q 1/38 (2006.01) H01Q 9/06 (2006.01)

Patent

CA 2586061

A near field meanderline like antenna assembly is disclosed which is configured to read an RFID label. The antenna is configured as a single and continuous conductor and is configured to extend from one end of a substrate forming a feed point to another end of a substrate forming a termination point. The termination point is connected to a ground through a resistor and the conductor is configured to direct current in two dimensions along the conductor. A localized E field directs a current distribution along an effective length of the antenna corresponding to a half-wave to a full-wave structure.

L'invention concerne un système d'antenne en champ proche de type serpentin, conçu pour permettre la lecture d'une étiquette d'identification par radiofréquence (RFID). Cette antenne se présente sous forme d'un seul conducteur continu, s'étendant d'une extrémité du substrat formant un point d'alimentation à une autre extrémité du substrat formant un point de sortie. Le point de sortie est raccordé à une masse par l'intermédiaire d'une résistance, et le conducteur est conçu pour diriger le courant dans deux dimensions le long du conducteur. Un champ E localisé produit une répartition du courant sur une longueur efficace de l'antenne correspondant à une structure demi-onde à pleine onde.

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