Sorry, but the previous person does not understand the difference between 802.11B and Broadband Cell technology.(G3)
The reason why I know so much about this subject is that I live in a remote area away from any standard broadband delivery methods.
There are many vendors who sell cell yagi antennas. You may want to go to http://www.wpsantennas.com
There are many pre-amplifiers/amplifiers for cell carriers. Verizon is CDMA. You can get a 20db preamp to increase your recieve signal. You would also hit the cell tower harder. As you may or may not know, the more gain that an antenna has, the more narrow the beamwidth is. You can buy a field strength meter that will cover the 1.9 Ghz range and find the maximum signal coming off of the cell tower.(lock down the yagi in that position. Take the feedline down into a G3 router (MB8000) that turns G3 into WI-Fi(802.11b/g) and then you can plug the PCMCIA card into the router and connect the antenna either into the amp/preamp or straight into the PCMCIA card.
This would allow you to connect wirelessly through your laptop and have a seamless connectivity to your G3 connection.
This is a good solution, but not an inexpensive one.
Feel free to look up my call and send me a personal e-mail if you have any specific questions.
I personally have this setup. It works, but do not expect a "cheap" solution.