A novel split ring slot antenna with multiband characteristics based on SIW

A novel split ring slot antenna with multiband characteristics is proposed in this paper. The antenna consists of a split ring slot and a ring slot on top surface as the radiator. A novel split ring slot antenna is proposed to realize polarized radiation based on the SIW cavity. Three patch-like radiation patterns and one monopolar radiation pattern at four different frequencies are excited by the single fed antenna. In addition, each operating frequency can be individually adjusted by the ring slot. Moreover, simulated results exhibit that the antenna achieves a maximum gain of 9.2dB in operating frequency with reflection coefficient less than -22.7dB. Its performance is obviously better than other designs, the proposed antenna has features of simple structure and multiband characteristics.