Amateur Extra › E9 Antennas and Transmission Lines › E9H11
E9H11
What feature of a cardioid pattern antenna makes it useful for direction-finding antennas?
Pick an answer to check it.
Answer: B. A single null
A cardioid pattern has a single, deep null. Pointing that null at a signal shows its direction without ambiguity.
Tip: Cardioid: one null for DF.