×

Contactless payment card reader with a frusto-conical operating volume

  • US 7,520,435 B2
  • Filed: 07/15/2005
  • Issued: 04/21/2009
  • Est. Priority Date: 07/15/2004
  • Status: Expired due to Fees
First Claim
Patent Images

1. A reader arrangement for reading contactless payment cards, the reader comprising:

  • an RF antenna circuit; and

    a landing plane positioned at a fixed distance from the RF antenna, wherein the RF antenna circuit is configured to generate a magnetic field Hov in a frusto-conical shaped operating volume, wherein the landing plane forms the smaller diameter base of the frusto-conical shaped operating volume, wherein the magnetic field Hov in the frusto-conical shaped operating volume is specified to power and communicate with the contactless payment cards placed in the frusto-conical shaped operating volume, wherein the frusto-conical shaped operating volume comprises;

    a frusto cone having an axial length S1, a small base diameter D1 and a large base diameter D2; and

    a cylindrical section having a diameter D2 and an axial length S2, wherein the RF antenna has a diameter of about 7 cms, wherein the landing plane is positioned at a fixed distance of about 15 cms from the RF antenna, and wherein the parameters S1, S2, D1 and D2 have nominal values of about 1, 3, 3 and 5 cms, respectively.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×