Proximity sensor antenna device and antenna structure thereof

A proximity sensor antenna device, comprising:

• an antenna structure, comprising:
• a first conductor having a feeding segment for connecting to a signal feeding cable, a coupling segment spaced apart from the feeding segment, and a direct current (DC) blocking unit connected between the feeding segment and the coupling segment;
• a high-frequency blocking unit connected to the coupling segment of the first conductor;
• and
• a second conductor spaced apart from the first conductor, wherein an end of the second conductor is connected to a ground, and the second conductor is provided without connecting any capacitance member and any inductance member;
• wherein the coupling segment of the first conductor is selectively in a coupling antenna mode and in a capacitance electrode mode;
• when the coupling segment is in the coupling antenna mode, the coupling segment is configured to couple with the second conductor through a radiofrequency signal;
• when the coupling segment is in the capacitance electrode mode, the coupling segment is configured to detect an external object, and a capacitance value between the coupling segment and the external object is variable according to a distance between the coupling segment and the external object;
• and
• a proximity sensor electrically connected to the high-frequency blocking unit, wherein the proximity sensor is electrically connected to the coupling segment of the first conductor via the high-frequency blocking unit.