Hey guys title says it all. I'm Looking to wrap a cylinder with the antenna to effectively pick up an rfid tag coming from any direction without degrading its efficiency (which is only about 2"). I'm sure I'm going to hear things I don't want to hear. So if you can please provide a link for improving signal range or area around a circumference for the seeed studio rd630 or for better tag reader (under $15). 
I know about powered transponders they will not work because i'm putting the tag on my dog who already ate a battery... cost $600 Thanks!
impellbm:
Hey guys title says it all. I'm Looking to wrap a cylinder with the antenna to effectively pick up an rfid tag coming from any direction without degrading its efficiency (which is only about 2"). I'm sure I'm going to hear things I don't want to hear. So if you can please provide a link for improving signal range or area around a circumference for the seeed studio rd630 or for better tag reader (under $15).
This is a huge subject. Antenna design is part engineering, part math and part black magic. The first rule is that you can't boost gain in all directions. Gain is almost always at the cost of input power or directionality.
I hate to do this but: rfid antenna design - Google Search