A mobile node, wherein the mobile node has a front facing surface and a rear facing surface, the mobile node comprising: a first antenna configured to communicate with a wireless network and a second antenna configured to communicate with a wireless network, wherein the first antenna and the second antenna are not directly connected, wherein the first antenna and the second antenna are positioned on the rear facing surface and/or on an outer edge of the mobile node, a first data line coupled to the first antenna and a second data line coupled to the second antenna, and a pair of ground traces (711, 721), the pair of ground traces being positioned between the front facing surface and the rear facing surface, wherein one of the pair of ground traces is coupled to the first data line and the other of the pair of ground traces is coupled to the second data line; wherein, the mobile node further comprises: a printed circuit board positioned between the front facing surface and the rear facing surface, and a first ground trace and a second ground trace positioned on, and/or embedded in, the mobile node front facing surface and/or positioned on the printed circuit board, wherein the first ground trace is electrically coupled to one of the pair of ground traces (711, 721) and the second ground trace is electrically coupled to the other of the pair of ground traces (711, 721), the first ground trace and the second ground trace are positioned substantially between projections of the first data line and the second data line in a plane parallel to the front facing surface, a portion of the first ground trace is substantially parallel to a portion of the second ground trace, the first ground trace and the second ground trace are coupled magnetically but are not electrically shorted, the parallel portions of the first ground trace and the second ground trace are separated by a distance in a range from about five millimeters to about 0.1 millimeters, wherein the position of the ground traces (712, 722) are such that a current passing through the ground traces (712, 722) moves in loops in a horizontal plane parallel with a front facing of mobile node and the direction of current loops in the first ground trace is clockwise, while the direction of current loops in the second ground trace is counter-clockwise. a first antenna configured to communicate with a wireless network and a second antenna configured to communicate with a wireless network, wherein the first antenna and the second antenna are not directly connected, wherein the first antenna and the second antenna are positioned on the rear facing surface and/or on an outer edge of the mobile node, a first data line coupled to the first antenna and a second data line coupled to the second antenna, and a pair of ground traces (711, 721), the pair of ground traces being positioned between the front facing surface and the rear facing surface, wherein one of the pair of ground traces is coupled to the first data line and the other of the pair of ground traces is coupled to the second data line; wherein, the mobile node further comprises: a printed circuit board positioned between the front facing surface and the rear facing surface, and a first ground trace and a second ground trace positioned on, and/or embedded in, the mobile node front facing surface and/or positioned on the printed circuit board, wherein the first ground trace is electrically coupled to one of the pair of ground traces (711, 721) and the second ground trace is electrically coupled to the other of the pair of ground traces (711, 721), the first ground trace and the second ground trace are positioned substantially between projections of the first data line and the second data line in a plane parallel to the front facing surface, a portion of the first ground trace is substantially parallel to a portion of the second ground trace, the first ground trace and the second ground trace are coupled magnetically but are not electrically shorted, the parallel portions of the first ground trace and the second ground trace are separated by a distance in a range from about five millimeters to about 0.1 millimeters, wherein the position of the ground traces (712, 722) are such that a current passing through the ground traces (712, 722) moves in loops in a horizontal plane parallel with a front facing of mobile node and the direction of current loops in the first ground trace is clockwise, while the direction of current loops in the second ground trace is counter-clockwise.