This paper has prepared a three-dimensional periodic structure frequency selective fabric (3D FSF) based on U velvet by velvet weaving method, with the silver yarns as the conductive material. Compared with the planar dipole periodic structure with the same U velvet bottom length size, the U velvet of the 3D FSF is extended in the two ends of the dipole along the Z direction and has double frequency resonance in the 2~18 GHz. With the increase of the U velvet bottom length, the resonant frequency moves to the lower frequency. The number of U connectings does not affect the resonant frequency with the same bottom length. The resonance peak of the sample with silver fiber as the conductive material is sharper than that of the sample with stainless steel fiber as conductive material. For further study, a cross-shaped 3D FSF made of clustered U velvet unit is proposed. It is demonstrated that the design and control of the 3D FSF is very flexible.

U-taped velvet fabric  /  3D periodic structure  /  frequency selective fabric  /  3D textile