An ISGW-based 5G millimeter wave ultra-bandwidth, high-gain fractal magnetic dipole antenna

For 5G millimeter wave communication, we propose an electromagnetic dipole fractal antenna with ultra-bandwidth and high gain based on integrated substrate gap waveguide (ISGW) structure. It is composed of a fractal metal patch and ISGW. The aim of the fractal antenna is to alter the current path and hence increase the bandwidth. The microstrip line is encapsulated between an ideal magnetic conductor and an ideal electrical conductor in an electromagnetic bandgap structure designed to achieve low insertion loss and improve antenna gain. The fabricated antenna achieves an impedance bandwidth of about 47.7% and an average gain of 9 dB at 24.72~40.20 GHz. And the antenna is based on the ISGW structure, which has the advantages of a simple and compact structure as well as a wide frequency coverage, which makes it perfect for modern millimeter wave communication.