context: It is also possible to use multiple active elements and combine them together with transmission lines to produce a similar system where the phases add up to reinforce the output. The antenna array and very similar reflective array antenna consist of multiple elements, often half-wave dipoles, spaced out on a plane and wired together with transmission lines with specific phase lengths to produce a single in-phase signal at the output. The log-periodic antenna is a more complex design that uses multiple in-line elements similar in appearance to the Yagi-Uda but using transmission lines between the elements to produce the output.
question: ఫేజ్ సిగ్నల్ (phase signal) లో సింగిల్ సృష్టించడానికి ఉపయోగించే అత్యంత సాధారణ మూలకం ఏమిటి?
answers: half-wave dipoles