Substrate integrated waveguide antennas/array for 60 GHz wireless communication systems

A single layer substrate integrated waveguide (SIW) antennas/array for high speed 60 GHz communications, are presented. SIW based single antenna element and then two 1× 4 array are designed. Two types of feeding networks are designed for the array; a classical approach of microstrip lines and complete SIW based design. A comparison between the resulted radiation characteristics is performed. The back radiation phenomena is found to be high in the case of microstrip lines feeding network. This effect is minimized by introducing a complete SIW based feeding network. The gain of SIW single antenna element is 6 dBi having radiation efficiency 80 %. A gain of 11.2 dBi is achieved for each array design and an efficiency of 76 % and 73 % is achieved for 1×4 array with microstrip feeding network and a complete SIW feeding network, respectively. A low loss/cost substrate, RT duroid 5880 is used in the proposed designs.