Design Of 230MHz RF Transceiver System For Electric Power Information Acquisition

Electricity information collection system is an important part of smart grid,mainly to achieve the power user information acquisition,real-time monitoring of electricity,so the choice of reliable communication technology plays a very important role on smart grid.Wireless communication is the foundation of the smart grid,223?231 MHz is a special frequency band for the power information collection system,which is divided into the National Radio Administration committee.The performance of 223?231MHz power acquisition system is of great significance for real-time and accurate acquisition of power information.This thesis studies the design of radio frequency transceiver system for 223-231 MHz power information collection.This research can not only provide communication solutions for smart grid,but also promote the development of smart grid.According to the requirements of the national grid,this thesis designs a miniaturized and low-power RF transceiver system based on 4FSK.In this thesis,zero if technology is used to simplify system structure,and chip with high integration is used to reduce system volume.The system consists of a control circuit,a modulation and demodulation circuit,a radio frequency conversion circuit,a power amplifier,a low-noise amplifier,and a power supply section.This thesis first introduces the design scheme of the system,the implementation of key technology analysis,and design considerations of the description of the system design index,the test results of the system are given,the results show that the maximum output power is greater than 33dBm,the digital frequency offset is 2.5kHz,the sensitivity is better than-107dBm,the absolute value of carrier tolerance less than 500Hz,spurious RF components are less than 5 ?W,adjacent channel power is better than 45dBc.And with a good EMC performance,meeting the national grid for the design of the request.The RF transceiver system of 223-231MHz designed in this thesis has been widely used in Kaixian of Chongqing.The performance of this system is stable and good application results have been achieved.It provides important technical support for the construction of smart grid.