Amateur Extra › E9 Antennas and Transmission Lines › E9B04
E9B04
What is the front-to-back ratio of the radiation pattern shown in Figure E9-2?
Pick an answer to check it.
Answer: B. 28 dB
In Figure E9-2 the main lobe is at 0 dB and the strongest response toward the rear is about 28 dB down. That gives a 28 dB front-to-back ratio.
Tip: Compare main lobe peak to rear.