I want to know the answer to the following question:
What is the most common element used to create a single in phase signal?
All the background I'm provided with is that "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.". Is that enough to answer the question?
Answer: yes