Generally, a larger diameter antenna will give you broader band performance. That is, an
antenna that is large in diameter or flat and wide like the internal dipoles will give you much
better broadband performance than a thin stainless steel antenna. When a thin stainless steel
antenna is tuned to 127 MHz (roughly the middle of the aircraft band) the maximum broadband
performance it can give is around 5 MHz whereas larger diameter antennas can give broadband
performance over 10 MHz range.
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