LIQUID CRYSTAL BASED FREQUENCY RECONFIGURABLE PRS ANTENNA SYSTEM

摘要

A liquid crystal-based variable frequency PRS antenna system according to an embodiment includes: a patch antenna outputting a radio wave of a variable frequency; A screen disposed on the same plane as the patch antenna; A partial reflection surface (PRS) including a liquid crystal that is spaced apart from the screen and the patch antenna by a predetermined distance and whose dielectric constant changes according to an applied voltage; And a control unit for applying a voltage to the partial reflection surface to adjust the dielectric constant of the liquid crystal, wherein the control unit includes the liquid crystal so that a distance between the screen and the partial reflection surface becomes a resonance length according to a frequency change of the radio wave. It is characterized by adjusting the permittivity of. According to the embodiment, by adjusting the dielectric constant of the liquid crystal and the reflection coefficient of the PRS in response to a frequency change, an antenna system capable of operating for multiple frequencies and having stable beam output and high gain characteristics can be implemented.