| 摘要 |
The present invention makes it possible to realize an antenna device and a portable radio set capable of greatly reducing the deterioration of antenna characteristics nearby a human body and thus, greatly reducing the deterioration of communication quality when an antenna element is retracted by electrically connecting first and second antenna elements to a balanced-to-unbalanced transform circuit by connection means when the first antenna element is retracted, supplying power to the first and second antenna elements from an unbalanced transmission line through balanced-to-unbalanced transform means for operating the first and second antenna elements as antennas, thereby in this case, preventing a leakage current from flowing to a ground member to which the unbalanced transmission line is grounded from the first and second antenna elements through the transmission in accordance with the balanced-to-unbalanced transform by the balanced-to-unbalanced transform means, and thereby preventing the ground member from operating as an antenna. <IMAGE> <IMAGE> |
