[天线]A novel U-shaped planar microstrip antenna for dual-frequency mobile telephone communications

Abstract—In this paper, we present a novel configuration of a U-shaped /jL{JF>I  
dual-frequency single feeding port planar inverted-F microstrip antenna j n&9<"W  
for mobile communication applications in both the GSM and DCS 1800 r;6YCI=z  
systems operated at 0.9 and 1.8 GHz, respectively. Staring from an initial JpHsQ8<  
design derived froman empiric approximation and transmission line model JU%yqXO  
for a standard rectangular microstrip antenna, we analyze, tune, and optimize PS<t
S_.  
the electric performance of the antenna and its dimensions by means g7Q*KA+  
of the generalized nonuniform finite-difference time-domain (NU-FDTD) {ZIFj.2  
Maxwell’s solver. 0Eg r Q  
Index Terms—Dual-frequency, mobile telephone handsets, nonuniform Nxs%~wZ  
FDTD, U-shaped pl .. 3v3Va~fm`  
hr}R,BR|  

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