Design And Implementation Of The Wireless Transceiver System Of The Model Airplane Based On Radio Frequency Chip A7105

Model airplanes have gained more and more attention as a kind of aircraft without manpower driving. Wireless transceiver system is the most important part of communication equipments in model airplanes. In this article, a design and implementation process of a2.4GHz model aircraft wireless transceiver system based on radio frequency chip A7105have been introduced. According to wireless transceiver system design requirements, selecting radio frequency chip A7105as the core module of the radio frequency end. Analyzing the chip internal modules and parameters, and calculating the signal power gain of transmission link. Sending the chip internal modules parameters to ADS software for system level simulation, and confirmed the calculation results of the transmission link power gain. Simulating and optimizing the transmitter PCB antenna based on HFSS software to improving the antenna resonance frequency and the antenna impedance.The schematic diagram and PCB layout of transceiver system have been designed based on Protel99SE software. The radio frequency chip A7105and micro control unit WT69P5are combined as a core which is surrounded by power circuits, crystal oscillator circuits, control circuits and other peripheral circuits. The part of surrounding Radio frequency chip A7015is radio frequency end circuit, and the other which surrounding the MCU WT69P5is baseband signal processing circuit. PCB layout and routing is rationally designed according to mechanical properties, electromagnetic characteristics, electrical characteristics and other realistic factors. Using vector network analyzer to test PCB antenna and analyzing the performance characteristics. The circuit objects can be applied in model airplane wireless communication after testing.