Abstract: To realize a hermetic connector structure with a high product yield at a low cost, which prevents leakage certainly. A hole is formed in a partition in an insulating connector base portion, and a conductive portion is adhered to the surface of the partition and formed as an integrated member covering the hole.

Abstract: To realize a hermetic connector structure with a high product yield at a low cost, which prevents leakage certainly. A hole is formed in a partition in an insulating connector base portion, and a conductive portion is adhered to the surface of the partition and formed as an integrated member covering the hole.

Abstract: A portable radio device antenna apparatus has a retractable antenna element mounted on the casing of a radio device. The antenna element includes a straight element having an electrical length of .lambda./2 and a helical coil having an electrical length of .lambda./4 and attached to the upper end of the straight element. The casing contains an impedance matching circuit having a pair of terminals and serving to perform impedance matching of the straight element. When the straight element is pulled out from the casing, a feeding metal piece connected to a radio circuit and a lower connection metal piece connected to one terminal of the impedance matching circuit are simultaneously connected to the short-circuit metal fixture of the antenna element, and an upper connection metal piece connected to the other terminal of the impedance matching circuit is brought into contact with the straight element.