Ultra-Low Profile, Compact Quasi-Yagi Antenna Suitable for IoT Application

The ultra-low-profile dualband planar quasiyagi (QY) antenna is proposed and investigated their bandwidth as well as gain characteristics which suitable for IoT application. The special characteristics of this antenna are encompassed 0.17λ×0.13λ radiating patch, as well as the ground plane, which has been reduced. The substrates comprise manually copper laminated thickness 1.25 mm and dielectric substrate εr is 4.5. Measurement results of input ports return loss (S11) represent the high peak of dual-band 27.78% from 0.8 GHz to 1.05 GHz and 23.4% obtained from 2.1 GHz to 2.65 GHz. The antennas maximum gain found 4.95 dBi and 7.26 dBi in correspondence to the lower and upper band, respectively. Excellent performance horizontal polarized broadside radiation characteristics with proper impedance matching, improve gain assures the proposed antenna promising candidate for IoT applications