suppression

Cette dernière antenne offre une bonne suppression de l'onde du ciel.

(countable, uncountable) The act or instance of suppressing.
(countable, uncountable) The state of being suppressed.
(countable, uncountable) A process in which a person consciously excludes anxiety-producing thoughts, feelings, or memories.
(countable, uncountable) The entirety of acts aimed at stopping or preventing the enemy to execute such unwanted activities like firing, regrouping, observation or others.
(countable, uncountable) A subconscious adaptation by a person's brain to eliminate the symptoms of disorders of binocular vision such as strabismus, convergence insufficiency and aniseikonia.