Fig. 1 shows the design architecture of the proposed
omnidirectional high-gain dual-mode dipole antenna. The
substrate was implemented using a single-sided FR4 plate
with a thickness of h = 0.8 mm, a dielectric constant ( ) of
4.4 and a loss tangent of 0.0245. The H-shaped dipole antenna
main body had a width of W = 53 mm and a length of L = 33
mm. The width of the central feeding pin was Wf = 1 mm, and
the dipole antenna main body had a width of W1= 3 mm. The
distance between the dipole antenna main body and the
reflective ground plane was L1= 21 mm, and the width of the
reflective ground plane was W2= 5 mm. Moreover, a 50Ω
micro-strip with a line width of 1.5 mm was coupled with the
dipole antenna main body as a feeding pin.
Fig.