Extra exam question E9H09

WhyA single-turn, terminated loop such as a pennant antenna creates a cardioid radiation pattern. A single-turn, terminated loop antenna, like a pennant antenna, produces a cardioid radiation pattern, a single main lobe with one deep null opposite it, a useful, unambiguous directional pattern for receiving applications, answer A. It isn't bidirectional, omnidirectional, or hyperbolic, those describe patterns produced by different antenna types or configurations.