Answer: directional

AnswerCrossword Clue
directionalsuitable for detecting the direction from which radio signals come or for sending out radio signals in one direction only
directionalRelating to, denoting, or designed for the projection, transmission, or reception of light, radio, or sound waves in or from a particular direction or directions
directionalRelating to or indicating the direction in which someone or something is situated, moving, or developing
directionalHaving a particular direction of motion, progression, or orientation