[天线]Dual-Band WLAN Dipole Antenna Using an Internal Matching Circuit

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 53, NO. 5, MAY 2005 1813 nUr5Qn?  
Dual-Band WLAN Dipole Antenna Using an Internal ?PxP% $hS  
Matching Circuit hF?1y`20  
Zhijun Zhang, Senior Member, IEEE, Magdy F. Iskander, Fellow, IEEE, Jean-Christophe Langer, and Jim Mathews ZgJQ?S$D  
Abstract—A dual-band dipole antenna for wireless local area _RYxD"my  
network (WLAN) is designed and experimentally tested at both the  'c&Ed  
2.4 and 5 GHz (IEEE 802.11b/g and 802.11a) WLAN bands. The wo}H'Q}Hj  
design procedure involves obtaining a full resonance frequency in OdbEq?3S/?  
the 2.4 GHz band and then using a matching network to achieve l9~e". ~'  
a secondary resonance at the 5 GHz band. It is shown that by correctly P;y45b  
designing the dipole, the matching network can be simplified .<?GS{6 N  
to only one series inductor. The design was experimentally verified 3Aip}<1  
by constructing a dipole on a FR4 board (12 mm 45 mm @n/\L<]t  
0 45 mm) and measuring its input impedance and the radiation jdP2Pf^^  
characteristics at both bands. The measuredVSWR2:1 bandwidth t,Lrfv])  
in the 2.4 GHz band is 710 MHz, and the bandwidth in 5 GHz band Rh2+=N<X  
is wider than 1 GHz. The VSWR 3:1 bandwidth is more than 3.6 hNiE\x  
GHz and it covers from 2.32 GHz to above 6 GHz. It is significant v~+(GqR=+  
that the designed dual-band dipole maintained good radiation efficiency LrfVh-}|:Y  
values at both bands. Specifically, and based on the measured ;>hO+Wo  
radiation patterns, an efficiency value of 85% 87% is obtained eeg)N1\  
at 2.4 GHz a .. OO\+J  
68|E9^`l  

未注册仅能浏览部分内容，查看全部内容及附件请先 登录 或 注册

谢谢楼主分享！！！！！

感谢LZ分享。。。。。