Design formulas for an asymmetric coplanar strip folded dipole

The planar folded dipole is an appealing choice as a radiating element due to the properties that it can be constructed using printed circuit technology and its input impedance can be adjusted over a wide range of values. The input impedance of this type of antenna depends on three quantities: the impedance of the transmission line mode, the impedance of the dipole mode, and the impedance step-up ratio. The solution to three problems associated with these three quantities is developed and design formulas for a planar folded dipole are presented.