Gain and directivity enhancment of microstrip patch antenna using frequency selective surface

In this present work, a microstrip patch antenna (MPA) using frequency selective surface (FSS) is proposed. The FSS acts as a reflection plane which is loaded onto a microstrip patch antenna to improve the performance of antenna. The single-layer FSS (SL-FSS) and double-layer FSS (DL-FSS) are respectively loaded onto the C-band microstrip patch antenna. After loading the FSS as the reflection plane, the gain is increased by 1.45dB and 3.97dB respectively and the directivity is also improved. The proposed antenna is designed to operate at the resonant frequency of 5.2 GHz. The antenna is simulated in HFSS using FR-4 substrate with a dielectric constant of 4.4, thickness of 0.8mm and loss tangent of 0.02. The proposed antenna can be used in WLAN applications.