Research on Undersampling Application on Narrowband Antenna in Planner Near-field Measurement

Based on Planer near-field translation theory and Nyquisty sampling theory, this paper studies the influence of sampling spacing on the result in planar near-field measurement by means of theoretical analysis and simulation, and acquires some laws and useful results, and proves the applicability and correctness of Nyquisty undersampling method in narrowband antenna measurement. The test efficiency can be effectively improved by increasing sampling spacing.