Design of Slotted Substrate Integrated Waveguide Antenna for Ka-band Automotive Wireless Communication

In this paper, a slotted multi-input-multi-output (MIMO) substrate integrated waveguide (SIW) antenna is presented for mm wave frequency bands and 5G wireless applications. The proposed design resonates in n257 frequency band dedicated for 5G communication according to 3<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">rd</sup> generation partnership project (3GPP). The presented antenna design exhibits excellent impedance matching of -29 dB with the gain of about 8.5 dB. Also, the antenna covers required impedance bandwidth of 500 MHz with mutual coupling of about -35 dB. Further, in the context of beamforming feature, the proposed design achieves the ±15° with the progressive phase shift of feeds of the antenna structure and also the design demonstrates the excellent performance in terms of diversity parameters. The proposed design is suitable for various 5G automotive use cases with the calculated data rate according to link budget calculations.