High gain antipodal fermi-linear tapered slot antenna (AFLTSA) array fed by SIW for MMW applications

A 32.5 GHz antipodal fermi-linear tapered slot antenna (AFLTSA) 1×8 array for millimeter wave applications is presented in this paper. The substrate integrated waveguide (SIW) feeding structure is used to excite this proposed antenna. The proposed antenna has a sine corrugation to improve the radiation characteristics of the antenna. The simulated results of the single element yields a wide bandwidth between 30-40 GHz with a high gain of 12.15 dB and a side lobe level better than 17.85 dB in E-plane. This antenna is further simulated for 1×8 antenna array which yields a high gain of 20.1 dB with a side lobe level better than 22.5 dB in E-plane. The objective of this work is to have a high gain and lowside lobe level for this proposed array structure. The work is simulated using AnsoftHFSS and CST Microwave Studio software.