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Development of millimeter-wave planar antennas using low-loss materials

Ito, Naoki*; Mase, Atsushi*; Kogi, Yuichiro*; Seko, Noriaki; Tamada, Masao; Shimazu, Hiroshi*; Sakata, Eiji*

As the importance of advanced millimeter-wave diagnostics increases, the fabrications of high-performance devices and components become essential. This paper describes the development of millimeter-wave planar antennas using low-loss fluorine substrates. The problems to be solved for the present purpose are the low degree of adhesion between copper foil and fluorine substrate and the accuracy of device pattern using conventional fabrication techniques. In order to solve these problems, surface treatment of fluorine films and a fabrication method using Electro-Fine-Forming (EF2) are proposed. In order to confirm the performance of the treated films, microstrip lines (MSL) and the planar patch antennas with low-sidelobe level in E-plane are designed and fabricated on the conventional fluorine substrates and on the grafted-PTFE (Polytetrafluoroethylene) films.

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Category:Physics, Applied

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