| 摘要 |
PROBLEM TO BE SOLVED: To provide merchandise for improving the protection and sensitivity of electromagnetic waves from portable telephone. SOLUTION: A radio wave reflection panel 1 of an open/close type or slide type is attached to the portable telephone. Then, a thin film 3 is formed on one side of that reflection panel 1. Besides, the material or thickness of the thin film 3 is calculated so as to strengthen a frequency band to be used for the portable telephone corresponding to resonant vibrations, surface acoustic wave device and interference. When the thin film 3 is defined as an outer layer, as an inside layer, an inside layer 4 of metal, alloy, metal oxide, inorganic or carbonaceous material is formed with the different material or molecular structure from that of thin film 3. On the opposite side of the reflection panel 1 on the side of the thin film 3, a speaker 2 is installed. |
