[天线]A Dual Fed and A Dual Frequency

As advances in wireless communication technology are taken very rapidly, =Sv/IXX\di  
there are many researches for a dual fed microstrip antenna in order to isolate \Cj B1]I  
the Tx and the Rx signals and for a dual frequency which is by means of \DzGQ{`~
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variable profile of patch in order to make a dual resonance. For example, the `x|?&Ytmf9  
study of a dual frequency operation has been carried out with the via-hole feed Q.[0ct  
and microstrip line feed[l]. Using a dual resonant microstrip antenna would be Mfs?x a  
better than the broadband microstrip antenna, because it is very difficult that a A=4OWV?  
single layer microstrip antenna has a bandwidth which covers Up- and Downlink NO3/rJ6-  
of IMT-2000 system. In this article, a dual resonant triangular microstrip 5X+A"X ;C  
antenna with slots-loaded and characteristic of isolation between the Tx and the K%d&EYoW]  
Rx ports using inset microstrip line feed a .. 9VT;ep  
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