A typical Anchor-Shaped Narrowband SIW based Circular Cavity-backed Slot Antenna for Indoor/Outdoor WLAN Applications

In this paper, a low profile substrate integrated waveguide (SIW) based circular cavity-backed antenna with slot is delineated and fabricated to operate in U-NII-2C band at a frequency of 5.49 GHz. A typical anchor-shaped slot is encompassed on the centre of the ground plane of the proposed antenna for radiation purpose. A gain of 3.6 dBi is obtained, portraying a narrow bandwidth of 70 MHz. Fabrication of parent antenna is done on Arlon AD270 substrate in the dominant TM010 mode. Parametric studies are performed with respect to return loss and gain of antenna. Simulations on the proposed design are performed in ANSYS make HFSS v15.0 and the antenna parameters are measured experimentally. The measured results show similar behavior to the simulated ones.