A Dual-Band Stacked Slotted Circular Patch Antenna for 5G Millimeter-Wave Applications

In this study, a stacked slotted circular patch (stacked SCP) antenna is presented for millimeter-wave (mmWave) applications. Substrate integrated waveguide (SIW) coupling slot is adopted for antenna excitation and two metallized vias are added for impedance matching improvement. A cross slot is etched on each circular patch which has a 45-degree inclination angle with the coupling slot. Dual-band radiation response (24-27.9 GHz and 37.9-44.8 GHz -10 dB |S
11
| passband) can be realized. An antenna prototype is fabricated and measured. The measured results are in accordance with the expected results. This compact antenna element can be easily integrated with the mmWave front end and is a promising candidate for fifth-generation (5G) mmWave applications, since the multiband requirement is presently given more attention for 5G communication systems and so on.