| 摘要 |
<p>PURPOSE: To improve division efficiency of frequency in a frequency transponder by detecting electromagnetic radiation of a first set frequency and transmitting electromagnetic radiation of a second set frequency which is quotient obtained by dividing this frequency. CONSTITUTION: A transponder provided with an active strip 10 of an amorphous magnetic material and a three-pole strip 12 of a magnetic material is provided in a tag 14. When the active strip 10 is turned into a vice magnetically so that it is in a scope of set magnetic field strength, the active strip 10 is a thin and long ribbon of a magnetostrictive amorphous magnetic material which partitions mechanical resonance frequency of magnetism of a second set frequency depending on dimension of a ribbon, has single axis anisotropy in the horizontal direction, and has magnetism hold force of low saturation so that it responds to excitation due to electromagnetic radiation of the first set frequency by transmitting electromagnetic radiation of the second set frequency. The amorphous magnetic material is selected from a group including Fe40 , Ni38 , Mo4 , B18 , Fe82 , B12 , Si6 , etc.</p> |
