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Haruo MATSUMOTO Tadahiro YORITA Youhei ISHIKAWA Toshio NISHIKAWA
A miniaturized antenna duplexer for 800 MHz band cellular portable telephone terminal was developed by using copper-plated rectangular coaxial dielectric resonators. The duplexer with mechanically stable construction is realized and available to surface mount devices. The volume is 3.7 cc about one half of the volume of a conventional dielectric duplexer for E-TACS.