I am the person that will be helping you today.
What is the distance between the router and the security camera?
I will be standing by, looking forward to your response.
The straight line distance between the router and camera is 150ft? Is the camera attached to a building with electricity?
Thank you for the update. In such cases, it is difficult to give the proper advice and suggestion if I don't fully understand the environment and how far away everything is. Is the camera only wireless capable? May I ask for the brand and model name of the camera?
Thank you very much for the update. In your case, you will be best off by using a wireless extender. The extender found at the following page will work for you: http://www.newegg.com/Product/Product.aspx?Item=N82E16833122671
The power of your router is probably rated at 60mw to 80mW. The extender that I linked above operates at the power of 700mW.
I look forward to hearing your feedback concerning whether or not your problem is fixed.
I hope to hear back that all is working. If this is so, please do not forget to rate my help on the top of this page (choose the number of stars and click the Submit button). If it is not, please respond below.
I will be standing by,Jason