Rf / Microwave Transceiver System

Communication is the tremendous power that drives the civilization, advancement and development of society. Communication has a lot of kinds such as wire communication, wireless communication, microwave communication, optical-network communication . Today , with the rapid development of tele-communication technologies , microwave communication becomes the indispensable part to our life.In the field of today's wireless communication, a new trend is the technology of direct RF modulation. In this construct, there has few complicated parts for once convert, such as image frequency filter and surface sound filter, and so on. Comparing with other wireless transmitter, it is small and low-cost ,and its circuit design is simple. Besides, it has wideband operating frequency, excellent amplitude balance and low phase error, so the future for its application is bright.The project about RF/microwave transmitter system adopts this configuration. In this system, baseband signal can be modulated into RF signal directly, accordingly, the signal received can be demodulated into baseband signal too. Meanwhile, the scheme also adopts the technologies about quadrature convert and integrated PLL in order to more integrated, smaller and stronger capability of anti-jamming.The following is my work for the project:(1) Introducing the general situation and developing trend of microwave communication technologies and RF technologies.(2) Introducing some configurations in the transmitter systems of microwave communication, analyzing the communication link, and researching standards in front end.(3) Researching the common and important modulation and demodulation technologies of microwave communication, mainly including PSK and QAM. Analyzing the principle and the realization of PPL.(4) Expounding the process of PCB design and the signal integrality.(5) Presenting the whole design scheme of the RF/microwave transmitter system. Using the AD8349 of ADI which is a quadrature modulator, the AD8132 of ADI which can supply differential drive singal of baseband, the ADF4360-2 of ADI and the P89LPC932 of Philips which supply the carrier signal; Accordingly, using the SP1925 of MITEL which is a quadrature demodulator, the SP5769 of ZARLINK and the P89LPC932 which supply the local oscillating signal.