Dual-Polarized/Dual-Band Antenna with Compact Size for GNSS and 5G NR Applications

A compact dual-band ring-slots with grounded-via integrated square-patch antenna is planned for circular/linear waves radiations. Four small unequal circular-ring-slots with grounded-via are integrated at the square patch corners for circularly polarized (CP) waves to reduce size of the antenna. These ring-slots with grounded-via offer compact antenna with CP radiation at the L-band. The antenna operates at the global navigation satellite system (GNSS) L1-band of 1.6 GHz with CP w and 2.07 GHz with a LP for 5G New Radio (NR) applications. An integrated ring-slot with via acts as a composite right/left-handed structure, so that the four-ring-slots with via can miniaturize the antenna structure at 1.6 GHz. The confirmed outcomes of a prototype antenna with size of 0.32λ
0
×0.32λ
0
×0.0264λ
0
(λ
0
is the free-space wavelength at 1.6 GHz) are: the bandwidth of 5.6% (1.585 GHz - 1.675 GHz) at the L-band and 0.75% (2.04GHz-2.07GHz) at the S-band for 10-dB return loss; 2.5% (1.59GHz-1.63GHz) at the L-band for 3-dB axial ratio (AR); peak gain of 4.9 dBic at 1.62 GHz and 4.0 dBi at 2.07 GHz.