Compact noise immune antenna for wireless device

A slot antenna for use in a wireless device, comprising:

• a conductive ground plane, the conductive ground plane defining a slot, the slot including a plurality of linear slot sections, the linear slot sections comprising;
• a first slot section formed in the ground plane and extending outwardly from an interior point of the ground plane, having a proximal end and a distal end;
• a second slot section formed in the ground plane perpendicular to the first slot section, the second slot section having a proximal end and a distal end, wherein the proximal end of the second slot section is connected to the distal end of the first slot section;
• a third slot section formed in the ground plane parallel to the first slot section and perpendicular to the second slot section, the third slot section having a proximal end and a distal end, wherein the proximal end of the third slot section is connected to the distal end of the second slot section;
• a fourth slot section formed in the ground plane parallel to the second slot section and perpendicular to the third slot section, the fourth slot section having a proximal end and a distal end, wherein the proximal end of the fourth slot section is connected to the distal end of the third slot section;
• and
• a fifth slot section formed in the ground plane parallel to the third slot section and perpendicular to the fourth slot section, the fifth slot section having a proximal end and a distal end, wherein the proximal end of the fifth slot section is connected to the distal end of the fourth slot section;
• and
• a metal trace on top of the ground plane and insulated therefrom, the metal trace extending horizontally across at least a portion of the slot and having a feed-point end and a termination end, wherein the metal trace is configured to supply excitation current to the slot antenna via the feed-point.