Spacecraft Re-Entry: High Freq Comm & Plasma Frequency

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Communication blackouts during spacecraft re-entry occur due to high-density plasma that forms around the vehicle, preventing radio waves from penetrating. The plasma frequency is a critical factor, as it determines which frequencies can pass through. Higher frequency communication has been suggested as a potential solution, but practical limitations and the physics of plasma interactions complicate this approach. The discussion highlights the need for further research into alternative communication methods that could mitigate the blackout issue. Understanding plasma behavior and its impact on communication is essential for improving spacecraft re-entry technology.
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I recently read about the communication blackout during a spacecraft re-entry.. The reason given was the high density plasma formed whose plasma frequency is such that the communication waves do not penetrate it. Why don't we use a higher frequency for communication which is sufficient to pass through the plasma?
 
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