[天线]Broadband and circular-polarized Space-Filling-Based Slot Antennas

Abstract—Based on the use of space-filling curves, broad-band hA?j"y0?  
and circularly polarized microstrip-fed slot antennas are proposed. UM7Ft"  
Broad-band performance is achieved through merging different !arcQ:T@G  
downscaled versions of a composition of “island-like” space-filling *eL%[B  
slot antennas without increasing the overall antenna size. This v@;:aN  
technique provides different resonant slot lengths corresponding to =1lKcA[z  
a wide range of frequencies. By merging three downscaled versions g*ES[JJH&  
of a composite second-iteration Moore slot antenna, a broad-band g# :|Mjgh  
slot antenna is developed. The proposed antenna has a bandwidth S(5.y%"<  
(VSWR 2) of 87.6% around 4.5 GHz, which is higher by a x{u_kepv[k  
factor of 13.5 compared to the square ring slot antenna, and by 6rL'hB!!]*  
a factor of 3 compared to the nested square rings slot antenna. |v8>22y  
The developed slot antenna has a maximum gain of 5 dB and a 2](R}  
total area of 3 3 cm2. Furthermore, by introducing asymmetry StWDNAf
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in the proposed slot antenna, which is implemented by replacing ,JT|E~P?8  
all parallel slots on one side of the structure and all inner slots by {o7ibw=E)  
a ground plane, circular polarization is achieved. The circularly N{`-&8q;K  
polarized slot antenna version has a 3-dB axial ratio bandwidth of gLQWL}0O  
22%withVSWR 2. The design and simulation of the proposed z.eqOPW  
slot antennas have been performed using .. it\{#rb=4  
E=w$r  

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可以好好学习了 di-O*ug   C=h$8Q  
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谢楼主分享好东西