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Development of millimeter-wave antenna with electrically low-loss property by using radiation induced grafting techniqueSep. 4, 2006JAEA (Japan Atomic Energy Agency) [President Yuichi Tonozuka], KHM (Kyusyu Hitachi Maxell LTD.), [President Masahiko Ochiai] successfully developed millimeter-wave antenna by surface modification of the fluorine plastic film with radiation induced graft polymerization of hydrophilic monomer. This modified surface improved the peel strength between fluorine plastic and spattered cupper layer. The peel strength became 2.5 times of untreated one as shown Fig.1. In the emerging application of flat millimeter-wave antenna to satellite communications and imaging diagnostics, the high-performance millimeter-wave planar antennas will play an important role. Previously, the fluorine resin was used as an antenna substrate.However, it is not enough strong in the adhesion between the copper layer and the fluorine substrate. The adhesion between fluorine resin [poly(tetrafluoroethylene)(PTFE)] and copper can be substantially improved by graft copolymerization of acrylic acid monomers. In the future, the novel antenna can be applied not only the demand for high frequency telecommunications field but also medical field such as medical check with non destructive equipment (Fig.2).  •Development of the millimeter-wave antennas with low loss electrical property. |
