Development of Jerusalem Cross type Rasorber for Wide-Angle Rasorbing

In recent years, to expand the wireless communication quality, metasurfaces are widely developed. Several kinds of metasurfaces are proposed. One of a unique metasurface is a Rasorber. The rasorber is a structure that acts as an electromagnetic wave absorber at some frequencies, and act as a transmits radio waves at other frequencies, and acts as a reflector at other frequencies. Rasorber can be used to prevent information leakage by attaching it to inside of room windows. However, Rasorber which developed in the past does not have good oblique incident characteristics. In this study, a Rasorber with good oblique incident characteristics was developed. From the results, the developed Rasorber has good oblique incident characteristics comparing with conventional Rasorbers. The Developed Rasorber has same characteristics for incident angle from 0 degrees to 75 degrees.