Planar Dualband SIW Antenna for K Band and mm wave Radar Applications

In this communication, an Antenna with technology named Substrate Integrated Waveguide, loaded with modified bowtie shaped slot using microstrip wave port is designed and simulated. The basic rectangular cavity is achieved in accordance with technology called substrate integrated waveguide technology, it includes copper filled vias between ground plane and top layer of cavity. The overall structure with feeding component is incorporated in the same plane and optimized using software ANSYS HFSS. SIW and modified bowtie shaped resonator are included to improve gain, efficiency and also bandwidth of the proposed structure. The proposed structure uses substrate material as RT Duroid with εr = 2.2 of dimension 30×25×0.508 mm. The structure has two resonance frequencies i.e. 21 GHz and 23.7 GHz with peak gain value 8.06 dBi and 10.07 dBi respectively including efficiency of 90.1 % and 92.2 % respectively. The designed is suitable for K band applications (mm wave radar applications) and also for 5G mid band. The proposed antenna electrical size is 0.37 11×0.31 11×0.0064λ
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