Hard wired -Wireless-Hard wired

Hello smart friends,

Basically this is what I would like to do. Can I have a hard wired “antenna” on one building that sends the signal to the “target” antenna on the target building that then comes out of that antenna via hard wired Ethernet connection to the target computer? I am most concerned with maintaining speed and bandwidth, cost is second to speed. I understand hardwired is always best, but that’s not an option. ( building is 40 ft away) thank you very much for any suggestions