A novel concept of SIW cavity-backed dual inverted edge curved L slots antenna array withthe defective ground plane is proposed in this paper. A linearly placed six-element inverteddual L slots array antenna is designed separated by a distance of 0.55λ_g to achieve highgain. Each pair of slots is separated by a column of the vias to form sub-cavities and thoseare fed individually. Defective ground structure (DGS) is introduced at the ground plane tomanage the propagation of wave to the last slots in the array. The slots are enclosed by aSIW cavity of height 0.24λ_g in a single substrate. A measured peak gain of 8 dBi is achievedat 14.29 GHz. The antenna shows a front-to-back ratio of 24.9 dB. The design is also comparedwith various aspects to show the advantages of each element introduced in the design.The validity of the design is proved by the good agreement between the simulated and measuredresults. This novel design can be used to achieve the performance requirement of a satelliteantenna working in Ku band.
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