Millimeter Wave Filtenna Array for 5G Communications

In this paper a
$1\times4$
antenna array with filtering characteristics for 5G millimeter wave (mm-Wave) communications is proposed. The element is composed of a single-port SIW cavity with a cross-shaped slot for couple feeding, and a double-layer patch, which is designed for band-stop feature. The simulation result indicates a pass-band(
$\mathrm{S}_{{11}} < -{10}\text{dB}$
of the antenna element ranges from 25.95 to 29.64 GHz. The average gain is 4.2dB in passband and less than -15dB in the
${32}\sim {34}\ \text{GHz}$
stop-band. On the basis of this element, a
$1\times 4$
antenna array is proposed. The 10dB maximum gain is obtained by in-phase excitation. Besides, by controlling the phases of excitation, a beam scanning of
$\pm 40^{\circ}$
with more than 8.5dB side-lobe suppression can be realized.