Wireless PCI adapter signal problem

[SpaceJellyDonut]

Hey guys!

 

So i have an old D-link 150Mbps PCI adapter in my pc that has a full 100% signal strength and 150Mbps connection about 70% of the time i use it. The other 30% of the time i use it, it goes down to between 1 Mbps and at most 30 Mbps. The times it does that i can basically not use the internet which i need for work, every page just keeps loading forever or timing out.

 

The adapter is a pretty old one that i got out of a box at a internship i had last year (i did get permission), and it only has one antenna. Could the adapter be showing it's age or is it just getting bad reception because of the one antenna? The router it connects to is pretty close so I'm almost positive it's not the one antenna's fault. And my phone which i use at the same spot always gets 100% signal and never does this.

 

What would you guys recommend? I can either get a higher gain antenna with a extender cable which i can then put on my desk instead of having it under the desk where it is now?

My local computer shop also has a 300 Mbps TP-Link PCI Adapter card with two antenna as well as a a few USB adapters(I'm not sure about their signal strength though as they have internal antenna?).

 

Any suggestions?