One dimensional phase conjugating/retrodirective mirror in millimeter-wave band

In this work, it was verified that a phase conjugating/retrodirective mirror which has been used in optical system can be realized in millimeter wave band. After explaining the concept and reflecting condition of a phase conjugating mirror, the mirror was designed from the design methodology of a Rotman lens and examined the phase conjugating capability in the simulation. The reflected pattern shows good radiation pattern between ±12°. This characteristic is useful in millimeter-wave band for many applications such as communications, imaging, sensing, and RF power delivering.