[天线]39 A Wide-Band Single-Layer Patch Antenna

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 46, NO. 4, APRIL 1998 471 E 0pF; P5  
A Wide-Band Single-Layer Patch Antenna 't_=%^q  
Naftali Herscovici, Senior Member, IEEE J2[QHr&tn  
Abstract—The typical single-layer patch printed on a dielectric 
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substrate is a narrow-band element. This well-known fact is _&![s]  
mainly due to the limitations imposed by the dielectric substrate. 6k3l/~R  
From efficiency and cost considerations, in most of the cases, ;<X3AhF  
the substrate cannot be too thick. In order to increase the 8"*$e I5  
microstrip element bandwidth, additional resonators in different ]R>k0X.V  
configurations and combinations can be used: parasitic elements, (1}Ndo^;w  
slots, etc. However, the microstrip antenna element with the S@"=,Xj M  
widest bandwidth (a variation of the aperture-fed stacked-patch Q6W)rJ[|  
element) is about 40–50%. This antenna, an aperture-fed stacked tw3d>H`  
patch, has a relatively poor front-to-back ratio, due to the fact `oz7Q(`  
that it has a slot in the ground plane. In this paper, a new type E:E&Wv?r  
of patch element is presented. The patch is suspended over the w./EJkKI  
ground plane and supported by a nonconductive pin. It is fed r
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by a three-dimensional (3-D) transition connecting the patch to a >`\*
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perpendicular connector. The typical bandwidth of this element o5$K^2^g  
(in terms of VSWR) is 90%. When built .. =nL*/  
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