Collocated MIMO Traveling wave SIW Slot Array Antennas for Millimeter Waves

Asim Ghalib, Mohammad S. Sharawi, Raj Mittra, Hussein Attia, Atif Shamim

Research output: Contribution to journalArticlepeer-review


This paper presents, a novel 4-element collocated traveling wave substrate integrate wave guide (SIW) multiple-input-multiple-output (MIMO) antenna covering millimeter wave (mm-wave) bands (28-32 GHz). The antenna has exhibits a matching bandwidth of more than 4 GHz, and a measured gain of 15 dBi. The MIMO antenna elements are collocated, thus significantly reducing the size of the proposed design. To spatially isolate the beams (obtain lower correlation coefficient) of the MIMO antenna elements, the beams are oriented in different directions. The slots within each SIW array are designed to provide tilted beams ,thus eliminating the need for a beam switching network. Four distinct beams are formed towards±10o and ±30o. The dimensions of the 4-element MIMO SIW design is 68×30.68×0.5 mm3. The proposed antenna has high gain,more compact size, simpler feeding and enhanced MIMO capability compared to other SIW antennas proposed in the literature.
Original languageEnglish (US)
JournalIET Microwave Antennas and Propagation
StatePublished - Oct 2020


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