I sign up citywide Wi-Fi high speed internet service. Signal is OK. But connection often drops. My laptop comes with wireless network card. But I don’t see connection to allow me to change or connect antenna. What can I do to improve reception of the signal and prevent dropped connection? (Of course, I can’t do too much about weak signal besides complaining to service provider). I’m looking for product that I can plug into USB port and improve the reception of the signal. And it must be cheap, easy to install