Board-to-board radio frequency coaxial connector

A board-to-board radio frequency coaxial connector, comprising:

• an adapter;
• a clamping socket arranged at a first end of the adaptor and including:
• a first outer conductor;
• a first inner conductor arranged coaxially in the first outer conductor;
• and
• a first insulator arranged between the first inner conductor and the first outer conductor;
• and
• a fixed socket arranged at a second end of the adaptor and including:
• a second outer conductor;
• a second inner conductor arranged coaxially in the second outer conductor;
• and
• a second insulator arranged between the second inner conductor and the second outer conductor;
• wherein the adapter includes:
• a third outer conductor;
• a third inner conductor arranged coaxially in the third outer conductor;
• and
• two third insulators arranged at two ends of the third inner conductor, respectively, and sleeved on an outside of the third inner conductor, the two third insulators being arranged coaxially with the third inner conductor and between the third inner conductor and the third outer conductor, wherein each of the two third insulators includes:
• a body portion and an auxiliary portion arranged around the body portion, wherein a first through-hole is arranged between the body portion and the auxiliary portion, a second groove recesses inwardly from an outer circumferential surface of the body portion, a second through-hole is arranged at a center of the body portion and extends axially to arrange the third inner conductor in the second through-hole,
• wherein:
• two ends of the third outer conductor are electrically connected to the first outer conductor and the second outer conductor, respectively;
• and
• the two ends of the third inner conductor are electrically connected to the first inner conductor and the second inner conductor, respectively.