Printed Folded Dipole with Groundplane
Image of the Printed Folded Dipole with Groundplane.

The printed folded dipole with groundplane is a simple planar structure, slightly smaller in size when compared to its wire counterpart. It is mainly used in mass-production electronics where the antenna must be etched onto the same substrate as the electronic components.

This antenna is designed to have an input impedance of 100 Ω and achieves an impedance bandwidth of approximately 10 %. It radiates a somewhat modified omnidirectional pattern due to the presence of the substrate and groundplane with a peak gain of approximately 2 dBi.

Typical gain at the center frequency
Typical reflection coefficient versus frequency