Patient device having an antenna array with polarization diversity

A patient device comprising:

• at least one E-field antenna;
• an H-field antenna;
• a transmitter/receiver device coupled with the at least one E-field antenna and the H-field antenna;
• a planar circuit board;
• wherein the H-field antenna is structured as a frame antenna, wherein a main axis of the at least one E-field antenna forms an angle of less than 30 degrees to a normal line of an area generated by the frame antenna;
• wherein the at least one E-field antenna is attached at the center of an edge of a circuit board and the frame antenna is attached in a lower region of the circuit board perpendicular to the two surfaces of the circuit board, wherein the frame antenna is made from a rigid conductive material;
• a controller;
• a tunable adaptation network that can be tuned by the controller;
• and,
• wherein the tunable adaptation network comprises
• at least three capacitors having capacitance values that increase in binary values with respect to one another wherein the at least three capacitors are configured to be switched in parallel to provide an antenna capacitance,
• a varactor diode coupled with said the at least one E-field antenna and the H-field antenna wherein said varactor diode is configured to fine tune said antenna capacitance,
• wherein the controller is configured to connect one or more of the at least three capacitors with at least one of the at least one E-field antenna and the H-field antenna, and to electrically insulate remaining capacitors from at least one of the at least one E-field antenna and the H-field antenna.