| 摘要 |
PROBLEM TO BE SOLVED: To obtain a measuring jig which eliminates a need of a radio-wave absorbing material and by which the radiation transmission power of an antenna can be measured simply and precisely by a method wherein a receiving antenna is situated so as to be parallel and close to an external antenna at a portable telephone. SOLUTION: A box-shaped cap structure 8 at a jig 100 comprises a hole 5 through which an external antenna 7 at a portable telephone 6 is passed. A receiving antenna 1 is attached to a prescribed position at the structure 8 in such a way that it is parallel and close to the antenna 7 when the surface of the telephone 6 is covered with the structure 8. In addition, one end of a coaxial cable 4 is connected to the power receiving terminal 2 of the antenna 1, and the cable is connected to an external apparatus by a connector 3 which is provided at its other end. The jig 100 is mounted on, and attached to, the telephone 6, the antenna 7 is pulled so as to be extended, and the telephone 6 is set to a receiving state. At this time, the transmission power of the antenna which is radiated to the air via the antenna 7 is input to a measuring device via the antenna 1 and the terminal 2. At this time, since the antennas 1, 7 are situated so as to be parallel and close, the influence of reflected waves is eliminated even when a radio-wave absorbing material is not used, and the transmission power can be measured simply and precisely. |
