wireless router operation in a confined space. RF reflections?

[kevin.zamora]

Our company has an 802.11g/n receiver that needs to be tested. We intend to test it with a wireless router in a confined space (metal enclosure) to prevent RF emissions from escaping and interfering with other equipment.  The receiver may be placed very close to the router and I'm concerned about 1) Reflections within the metal enclosure hampering operations as well as 2) Overpowering the receiver. 

What material should I line my enclosure with to prevent reflections? 

Is there a preferred router that you recommend? Would a unidirectional attenna be the best? Should I set the power level to the lowest possible?  

Thanks for any suggestions.

[Leo Laohoo]

What material should I line my enclosure with to prevent reflections?
Would a unidirectional attenna be the best?
Should I set the power level to the lowest possible?

A directional antenna with a very sharp frontal lobe.  If the distance is short (and the client doesn't move), you may want to lower the power of the AP.  Set the power to the lowest possible and crank it up one-at-a-time until the signal strengths go up.  

Is there a preferred router that you recommend?

Depends on what you are doing.  If you want to just test the RF receiver then buying a router is "over the top".  I'd just get a plain 802.11 a/b/g/n AP.