2.4GHz Zigbee数传模块传输距离的估算方法

采用802.15.4a信道损耗模型，探讨了2.4GHz Zigbee射频模块辐射传输损耗的分析方法，分析了影响传输距离的因素，推导了最大传输距离的估算公式．针对设计的Zigbee射频模块具体电路，对传输损耗和最大传输距离进行了分析计算，并作了实验测试，估算误差小于10％，符合工程应用要求，可作为2.4GHz Zigbee射频数传模块的设计和工程应用传输距离估算的理论依据．

Estimation method for the transmission distance for the 2.4 GHz Zigbee application

It is a troublesome matter for a Zigbee designer that using the general wireless channel model to estimate transmission distance results in lager errors. By the 802.15.4a channel model, the analytical methods of 2.4GHz Zigbee RF module radiation transmission loss is discussed; the factors that affect the transmission distance are analyzed, and the estimation formula for the maximum transmission distance is derived. For the Zigbee RF module specific circuit designed, the transmission loss and the largest transmission distance are calculated and through the experimental test, the estimated error is less than 10％, which is in line with the requirements of engineering applications, and it can be used as the theoretical basis for 2.4GHz Zigbee RF module design and engineering applications to estimate the transmission distance.