A very small double C-patch antenna contained in a PCMCIA standard PC card

A very small size partially shorted double C-patch antenna on a truncated ground plane has been successfully integrated to a Personal Computer Memory Card International Association (PCMCIA) card. The antenna has the same performance and characteristics in free space and inside the PCMCIA slot in any personal computer. The card has a good reception sensitivity from any direction and regardless of its orientation. That is because the used partially shorted double C-patch antenna has isotropic radiation patterns and it is sensitive to both vertically and horizontally polarized radio waves. Furthermore, double C-patch antennas have an excellent performance beside the human body. Hence, the PCMCIA card has also a high reception sensitivity when it is hand-held and inside the operator´s pocket