Compact Double Folded Quarter Mode Substrate Integrate Waveguide Filtering Antenna with Triangle Sierpinski Fractal for 5G Application

A compact double folded quarter mode substrate integrate waveguide (DFQMSIW) filtering antenna with triangle sierpinski fractal is designed and proposed in this paper. The combination of double folded substrate integrate waveguide (DFSIW) and quarter mode substrate integrate waveguide (QMSIW) miniaturizes the proposed structure. By adding a three-order triangle sierpinski fractal structure on the top metal layer, the presented antenna has a good filtering characteristic. The simulated return loss of this filtering antenna is -19.66dB and the maximum gain of 5.16 dB in the frequency band (7.65GHz-7.9GHz) is realized, which makes it a good candidate for the wireless communication systems for 5G application.