Planar antenna unit applied to 5G millimeter wave dual frequency bands and array thereof

The invention discloses a planar antenna unit and array applied to 5G millimeter wave dual frequency bands. Comprising a first dielectric substrate 1, a second radiation patch 2, a third feed line structure 3, a fourth defected ground structure 4, a fifth radiation patch 5, a sixth radiation patch 6, a seventh radiation patch 7, an eighth radiation patch 8, a ninth feed network 9, a tenth defected ground structure 10 and an eleventh dielectric substrate 11. And the second radiation patch is obtained by Boolean operation of three ellipses with different long and short axis ratios. The planar antenna unit comprises a second radiation patch which is connected with a third feeder line structure and is printed on the upper surface of the first dielectric substrate, and a fourth defected ground structure is printed on the lower surface of the first dielectric substrate. According to the array, fifth to eighth radiation patches are linearly arranged, are connected with a ninth feed network and are printed on the upp