RegisterYagi antenna, reflector, directorYagi antenna consists of a single active element and several passive ones. The role of the active element is usually played by a symmetric (or folded) dipole operating in one-quarter-wavelength resonance. Passive elements are dipoles without the excitation gap. One passive element, which is longer than the active one, is positioned behind the active element and plays the role of the reflector. The other passive elements are shorter than the active one, are positioned in front of the active element, and are called directors. Back
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