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This paper presents a compact triple and wide band RF antenna with ultra-thin size based on PIFA structure, which covers the GSM/DCS/RFID/TD-SCDMA/WLAN services at the same time. The proposed RF antenna occupies a total volume of only 32×25×3.4mm3. A novel inverted “Z” shape slot structure is used for the first time in antenna design, it is proved to be more suitable for overall network matching of...