Portable radio apparatus

A portable radio apparatus comprising:

• a first housing;
• a first circuit board disposed within the first housing;
• a second housing;
• a second circuit board disposed within the second housing;
• a radio circuit disposed on one of the first circuit board and the second circuit board;
• a third housing disposed between the first housing and the second housing;
• a first hinge part which couples the first housing and the third housing so as to be rotatable about a first rotation axis;
• a second hinge part which couples the second housing and the third housing so as to be rotatable about a second rotation axis perpendicular to the first rotation axis, which comprises an electrically conductive member, and which is hollow;
• a connection cable which is inserted into the second hinge part, and which electrically connects the first circuit board and the second circuit board;
• and
• an antenna element disposed within the third housing,
• wherein the antenna element and the second hinge part are connected such that the second hinge part functions as a ground of the antenna element, and
• wherein the portable radio apparatus further comprises an electrically conductive connection member electrically connecting the ground of the antenna element and a ground of the second circuit board.