In addition, antennas tuned to the right plasma densities can be sensitive to lower radio frequencies while remaining unresponsive to the higher frequencies used by most radars.

• 此外，天线的电浆密度如果调整适当，可使它对较低的无线电波频率相当灵敏，对大多数雷达使用的较高频率则仍然没有反应。