reverse polarity

polarity	connector:antenna	connector:device
standard	male inner thread center pin	female outer thread center socket
reverse	male inner thread center socket	female outer thread center pin

One standard and one reverse polarity connector does not allow the signal to pass through.

standard polarity + standard polarity: mechanically and electromagnetically
standard polarity + reverse polarity: either mechanically or electromagnetically
reverse polarity + standard polarity: either electromagnetically or mechanically
reverse polarity + reverse polarity: mechanically and electromagnetically

wall power plugs and sockets worldwide