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need help in UHF near-field loop antenna

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Changer119

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hi

I'm using the CST MWS to simulate the UHF RFID near-field loop antenna, and i modelized the antenna as following. But i don't know what size of the loop is suitable? How can i get the right geometry of this loop?


For this kind of antenna, i used "discrete port" as the excitation. The H-field is monitored as following.


Any suggestion to improve the performance of this loop antenna???

Thanks in advance!

FC
 

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