expression, noun
elephant cage; Wullenweber antenna
Literally 'elephant cage', but also a nickname for the Wullenweber antenna, a large circular antenna array used for radio direction finding. The technical sense is domain-specific.
動物園で象の檻の前で立ち止まった。
I stopped in front of the elephant cage at the zoo.
その基地には巨大な象の檻アンテナが設置されていた。
A huge Wullenweber antenna was installed at the base.