Is Antenne der, die or das?

The correct German article for Antenne is die. The noun Antenne is Feminine. So you always say: die Antenne. Learn the article together with the noun — German nouns don't follow predictable gender rules most of the time.

The plural of Antenne is: die Antennen. In the plural, every German noun takes the article "die". So: die Antennen. Example: ein Antenne → zwei Antennen.

Correct: die Antennen. The form "die Antennes" is wrong. The plural of die Antenne is die Antennen. In the nominative plural, you always use the article "die".

die Antenne follows the four German cases. Nominative: die Antenne, Accusative: die Antenne, Dative: der Antenne, Genitive: der Antenne. In plural: die Antennen / den Antennen. Learn these forms together with the noun.

The genitive singular of die Antenne is: der Antenne. The genitive plural is der Antennen. German uses the genitive to express possession or belonging. Example: die Farbe der Antenne.

The dative plural of Antenne is: den Antennen. In German, dative plural nouns usually end in "-n". So you say: "mit den Antennen". Use this case after prepositions like mit, von, bei, zu.

Antenne ends in -e. German nouns with this ending are almost always feminine. Nouns ending in -e are often feminine (die), especially two-syllable words. That's why the article for Antenne is die.

Antenne is a noun and must be capitalized in German. You'll find example sentences above for each case. The article die stays the same in nominative singular but changes in other cases. Practice declension in your own sentences.

Yes, Antenne is a noun (also called a substantive). German nouns are always capitalized. The article for Antenne is die. Every German noun has a fixed article you must memorize.