[天线]A Dual Fed and A Dual Frequency

As advances in wireless communication technology are taken very rapidly, dnomnY(*<  
there are many researches for a dual fed microstrip antenna in order to isolate ~~Bks{"BS  
the Tx and the Rx signals and for a dual frequency which is by means of hDi~{rbmc  
variable profile of patch in order to make a dual resonance. For example, the L ~'98C  
study of a dual frequency operation has been carried out with the via-hole feed R*vQvO%)h  
and microstrip line feed[l]. Using a dual resonant microstrip antenna would be I?Iz5e-  
better than the broadband microstrip antenna, because it is very difficult that a $B8Vg `+  
single layer microstrip antenna has a bandwidth which covers Up- and Downlink WzstO}?P(  
of IMT-2000 system. In this article, a dual resonant triangular microstrip lrZ]c:%k  
antenna with slots-loaded and characteristic of isolation between the Tx and the @'>RGaPV  
Rx ports using inset microstrip line feed a .. s! 2[zJ19p  
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