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In high-speed transmission circuits, signal integrity is an inevitable problem. This paper describes the air-isolated PCB connector design used in the aerospace electronic equipment. First based on the small size and light weight of aerospace electronic equipment and the combination of high-speed connector design method we proposed the concept of air-isolated. We study the factor impacting the high-speed connector signal integrity, including the cross-sectional distribution, spacing out, and the offset. According to frequency-domain and time-domain to simulate the high-speed connector models, the results showed that connector has been fully attained the crosstalk values les3% requirement in the 40 ps rise time at speeds ges5 Gbps.

In high-speed transmission circuits, signal integrity is an inevitable problem, a major factor caused PCB board signal integrity problems is impedance mismatch. This paper based on the theory of transmission lines, according to the coplanar waveguide (CPW) structure, designed a high-speed differential connector which was separated by air. And use 2D simulation software to analyse the differential pairspsila geometry and the relationship of frequency and differential impedance. Through the parameters optimization, and get a good cross-section structure. This structure design of the connector has the advantages of small size, light weight and good impedance matching.

This paper introduces the principle of EMI for high-power switching power supply and analyzes the coupling path of conducted interference. The models of circuit simulating are established by PSpice software. The analysis of simulating result and testing data are helpful for the design of switching power supplypsilas electromagnetic compatibility.