Low-pass and high-absorption electromagnetic functional layer

• Main Authors: WANG JIAFU, QU SHAOBO, DU HONGLIANG, ZHANG JIEQIU, MA HUA, PANG YONGQIANG
• Format: Patent
• Language: English
• Published: 03.02.2016
• Subjects: ANTENNAS, i.e. RADIO AERIALS; BASIC ELECTRIC ELEMENTS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; PRINTED CIRCUITS; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE; WAVEGUIDES

The invention discloses a low-pass and high-absorption electromagnetic functional layer, which comprises a low-pass and high-resistance frequency selection surface and a wave absorption unit array, wherein the low-pass and high-resistance frequency selection surface comprises metal structure unit arrays which are etched on two surfaces of a dielectric substrate and are different in structure size; the periods p of the unit arrays are 10.0mm to 20.0mm; metal structure units have rotation symmetry; the frequency selection characteristics of the metal structure units are irrelevant to the polarized direction of an incident wave; the metal structure units on two surfaces are different in size; the wave absorption unit array is a periodic array which comprises square or round sheets which are fabricated by magnetic loss radar wave-absorbing materials or resistance type wave-absorbing materials; the wave absorption unit array has broadband wave absorption performance on a high-frequency band; the sizes of wave absorption units are smaller than those of the metal structure units; and each wave absorption unit is adhered to one side of each metal structure unit with a relatively small size of the low-pass and high-resistance frequency selection surface. The obtained material is small in insertion loss, small in thickness, flexible in design and low in cost.