This letter presented a novel low-profile method to improve the bidirectional gain of a #dual-#element #folded #dipole #antenna (#DFDA). The proposed technique employs surface current distribution conditioning using integrated parasitic elements while preserving the radiators. The authors introduce a middle layer consisting of a 1-D array of metal strips embedded between the upper and lower surfaces of the dipole, called #midstrips. The midstrips are designed as parallel resonators and play the key role of current polarizing of the dipole currents. At the presence of the midstrips, the cross currents on the dipole surface are polarized out of phase and cancel each other, improving radiation-polarization purity consequently. The co- components are changed from a distributed form to a triple current form, which leads to the excitation of a new resonance. The geometric-progression-based array factor is extracted to model the gain enhancement mathematically. ---- Ali Heidari, Reza Zaker, Ali Kheirdoost
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https://lnkd.in/eApxXiBm
a beautiful illustration 😍