Rat-Race Power Divider/Combiner for 5G Application Using Substrate Integrated Gap Waveguide

In this paper, a rat-race coupler based on Substrate Integrated Gap Waveguide technology (SIGW) is designed and simulated. To achieve a good performance for SIGW structure, a proper unit-cell in range of 16-40 GHz, which is completely convenient for 5G application, is designed. The proposed rat-race coupler has lower leakage and loss, in comparison to conventional ones. This coupler has a center frequency and bandwidth of 31GHz and 19.34%, respectively; which is calculated by considering |S
₁₁
| <; -10 dB. The coupler has also 0.5 dB tolerance in balance power-dividing at practical spectrum.