The effect of embroidery parameters on the signal transmission performance of microstrip line

With the rapid development of embroidered electronics, the research on microstrip lines as important connecting devices is crucial. Although the proposed research has explored the influence of embroidery parameters on some electrical properties of embroidered electronics, it is difficult to design and fabricate embroidered microstrip lines (EMLs) with specific transmission performance based on existing research. Therefore, in order to better design and fabricate EMLs with good transmission performance, the effect of embroidery parameters on their transmission performance needs further exploration. In this work, relevant models to simulate their transmission performance was proposed. Firstly, considering the cases where the conductive yarn is only distributed on the fabric surface as well as in both the surface and the thickness direction of the fabric, two geometry models are constructed to simulate the path of the conductive yarn in the embroidered conductor strip. Based on this, the transmission performances of the EML are simulated and analyzed. Then, two different sets of embroidered conductor strips were manufactured to fabricate microstrip line, and their transmission performance was tested to verify the rationality and accuracy of the above simulation model. Finally, based on simulation analysis and experimental testing, the influence of stitch spacing and stitch length on the transmission performance of EMLs are investigated, and the prediction bias of the models is analyzed. It is believed that the proposed model will provide a theoretical basis for the design of EMLs.