公开(公告)号：US20170300800A1

公开(公告)日：2017-10-19

申请号：US15641939

申请日：2017-07-05

Applicant: COMPOSECURE, LLC

Inventor： JOHN HERSLOW ,  MICHELE LOGAN ,  DAVID FINN

IPC: G06K19/077 ,  G01B7/06 ,  H01Q1/22 ,  H01Q7/00 ,  H01Q1/38

CPC classification number: G06K19/07722 ,  G01B7/06 ,  G06K19/07783 ,  H01Q1/2225 ,  H01Q1/38 ,  H01Q7/00 ,  Y10T29/49016

Abstract: In a smart card having an antenna structure and a metal layer, an insulator layer is formed between the antenna structure and the metal layer to compensate for the attenuation due to the metal layer. The thickness of the insulator layer affects the capacitive couplilng between the antenna structure and the metal layer and is selected to have a value which optimizes the transmission/reception of signals between the card and a card reader.