Optically-readable electromagnetic antenna

Optically-readable electromagnetic antenna for an electronic device, the antenna comprising:

• a) a substrate having a selected antenna region;
• b) a first conductive element having a first color disposed over the substrate in a first portion of the selected antenna region;
• c) a second conductive element having a second color different from the first color and disposed over the substrate in a second portion of the selected antenna region, the second portion at least partially overlapping the first portion so that the first and the second conductive elements are electrically connected;
• and
• d) a feed line electrically connecting the first or the second conductive element to the electronic device;
• e) wherein the first and the second portions together define an optically-readable pattern.