Design of a Reference Dipole-Loop Antenna Array at 28 GHz

This paper proposes an array antenna at 28 GHz that can be used to measure polarimetric omni-directional pathloss. The array consists of a printed microstrip dipole and loop with an integrated tapered balun structure. The design and experimental results of low profile microstrip dipole and loop antenna show wideband matching and radiation performance. Over 6 GHz of -10 dB impedance matching bandwidth has been achieved for the dipole, whereas the loop shows 0.2 GHz ranging from 27.9 to 28.1 GHz. A fairly good agreement between the simulated and measured radiation pattern validates our simulation method. The omni-directional behaviors of both dipole and loop make it suitable as a reference antenna for over-the-air antenna testing at 28 GHz.