Abstract: This paper introduces an ADS-B antenna configuration analysis model. It is designed to determine ADS-B antenna deployment solutions that meet air traffic control requirements based on local circumstances. The model employs message decoding accuracy as an evaluation metric and takes into account factors such as aircraft quantity, radar/TCAS deployment status, and aircraft response/broadcast rates. It analyzes message decoding rates for directional and omnidirectional antenna configurations while verifying the model's accuracy. The correctness of the model is verified by the actual data, and the results are basically consistent with the theoretical model, which proves that the ADS-B antenna configuration analysis model is correct and effective.