Circularly Arranged Six Element Cavity Backed SIW Arc Shape Slot Antenna

In this research work, cavity backed antenna (CBA) with arc shape slot and circularly arranged six element cavity backed arc shape slot antenna are proposed by incorporating Substrate Integrated Waveguide (SIW) technology. Initially, a single element CBA having arc shaped slot in opposite layer to feedline, is considered. The cavity boundaries are constructed with the technique used under SIW technology. The antenna offered high gain and low cross polarization (X-Pol) behavior in operating frequency bands. The designed cavity backed SIW arc shape antenna offers twin operational band in the operating frequency range of 10.12 GHz to 10.34 GHz (1
^st
band) and 13.58 GHz to 13.96 GHz (2
^nd
band). The found mid operating frequencies are 10.21 GHz, and 13.79 GHz, while at mid operating frequencies achieved antenna gain is 12.01 dBi and 12.50 dBi, respectively in the direction of intended communication. Furthermore, six elements circularly arranged assembly is created such that arc slots are oriented along the transversal direction along with longitudinal orientation to feedline (tapered microstrip line). The design of circularly arranged six element CBA achieves a greater bandwidth, enhanced gain and overall reduced amount of cross polarization value. The designed array of the cavity backed SIW are shape slot antenna also offers twin band outcome in the operating radio frequency (RF) band of 10.26 GHz to 10.61 GHz (1
^st
band) and 13.71 GHz to 14.16 GHz (2
^nd
band), and the achieved mid operating frequencies are 10.41 GHz and 13.96 GHz, respectively. At these frequencies antenna gain is 20.10 dBi and 20.50 dBi, in the direction of communication. The proposed model has achieved an overall antenna efficiency of 93%.