Development ofRF transceiver with small antenna

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Along with explosive spread mobile phone, wireless LAN, and such as satellite broadcasting, the rapid development of broadband, the need for high-speed wireless data communication is growing rapidly. Asa problem in the wireless communication device, it is difficult to realize miniaturization of the passive device such as antenna and bandpass filter. Moreover, it is difficult to fabricate miniaturized on-chip impedance matching circuit. In order to solve these problems, miniaturized antenna and CMOS RF front-end chip with impedance matching circuit were designed and fabricated, and tested.