Patent ID: 6720930
Filing Date: 2004-04-13
Classification: A01K,H01Q

Abstract:
An antenna for use with a remote interrogator/reader unit used to detect information specific to each of a plurality of radio frequency transponders attached to animals, said antenna comprising:a first antenna coil arranged in a closed loop configuration and extending along a first axis; a second antenna coil arranged in a closed loop configuration and extending along a second axis, said first coil positioned in close proximity to said second coil and oriented so that first axis extends substantially perpendicular to said second axis forming a crossing pattern; a housing containing said first and second coils, said housing capable of being positioned in the proximity of said transponders; and wherein said antenna generates multi-directional electromagnetic fields when powered by said remote interrogator/reader unit, and said first and second antenna coils are activated in opposite orientation said activation thereby reducing RF noise from the environment.