The Omni-directional Dipole Antenna Structure and Design

TLDR: In this article, a low profile microstrip planar dipole antenna with tapered balun was designed and the antenna exhibits 421 MHz for VSWR = 2 bandwidths.

Abstract: The design relates generally to the field on antennas and more specifically, to a low profile linear polarized H-shape dipole antenna. The antenna includes a printed circuit board that has a dielectric substrate provided with H-shape face and one dipole element formed on the dielectric substrate. The printed circuit board is also provided with a balance to unbalanced feed network that is operatively connected to the H-shape dipole arm element. In this design, the H-shape dipole antenna fed network with tapered balun is studied. The design and experimental results of low profile microstrip planar dipole antenna with tapered balun shows fairly good performances in this paper. The feed network of the design with wider bandwidth and lower power loss tapered microstrip line to overlap coplanar stripline (CPS) transition that provided unbalanced to balanced line with balanced equal power output of phase. The achieved planar dipole antenna exhibits 421 MHz for VSWR = 2 bandwidths. Full-wave EM analyses shows good agreement with those experimental data.