Research Of Signal Integrity For Wireless Data Transmission System

With the improvement of circuit speed and chip processing technology.the impact of interconnect channels on the signal becomes more apparent,the signal distortion will affect the circuit function.As a direct consequence of improved manufacturing methods,Signal Integrity will become an increasing problem for even the lowest cost chips.If Signal Integrity effects are not taken into account right at the beginning,products will fail.With the rapid development of wireless communication technology,wireless technology has been widely used in many fields.Wireless data transmission technology has the advantages of low cost,convenience,high stability and reliability,and can meet the needs of various fields.The Signal Integrity of wireless data transmission system is the basis of ensuring the stability of the system.Therefore,it has important significance to research the Signal Integrity of the system.Based on the above considerations,this paper takes the nRF series wireless transceiver module of Nordic company as the object,using advanced simulation software to complete its Signal Integrity analysis.The main work of this paper is as follows:According to the theory of Signal Integrity,this paper deeply studies the factors that affect the Signal Integrity of the system.Using the model to explore the high speed system in the presence of reflection,crosstalk and other phenomena,verify the solution of the Signal Integrity.In this paper,wireless chip nRF24LU1 works in 2.4GHz~2.5GHz ISM band is selected as the research object and analyze the peripheral circuits of wireless digital transmission system design.Using the simulation software such as Ansoft HFSS to establish 2.4GHz1/4 wavelength antenna model,complete simulation analysis.Search the Signal integrity of principle diagram,printed circuit board,Simulation software Designer Hyperlynx,Altium have been applied to analyze key network.Finally,complete the search of nRF24LU1 wireless module PCB electromagnetic compatibility.The test result shows that the electromagnetic compatibility of nRF24LU1 wireless data transmission module is good,the PCB crosstalk is in the acceptable range.