[天线]A Dual Fed and A Dual Frequency

As advances in wireless communication technology are taken very rapidly, nr\q7  
there are many researches for a dual fed microstrip antenna in order to isolate Llz['"m  
the Tx and the Rx signals and for a dual frequency which is by means of Bjj<\8^M  
variable profile of patch in order to make a dual resonance. For example, the l1+[  
study of a dual frequency operation has been carried out with the via-hole feed @"|i"Hk^  
and microstrip line feed[l]. Using a dual resonant microstrip antenna would be {G*QY%j^  
better than the broadband microstrip antenna, because it is very difficult that a I&]G   
single layer microstrip antenna has a bandwidth which covers Up- and Downlink Bw<
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of IMT-2000 system. In this article, a dual resonant triangular microstrip c3xl9S,5  
antenna with slots-loaded and characteristic of isolation between the Tx and the K7`YJp`i  
Rx ports using inset microstrip line feed a ..
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