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

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 46, NO. 4, APRIL 1998 471 Mc  
A Wide-Band Single-Layer Patch Antenna TDtHRhq7  
Naftali Herscovici, Senior Member, IEEE k \t6b1.M  
Abstract—The typical single-layer patch printed on a dielectric I tn?''~;  
substrate is a narrow-band element. This well-known fact is EU5(s*A  
mainly due to the limitations imposed by the dielectric substrate. .<P@6Jq  
From efficiency and cost considerations, in most of the cases, (yu0iXZY  
the substrate cannot be too thick. In order to increase the Mi!ak  
microstrip element bandwidth, additional resonators in different B]D51R\}VE  
configurations and combinations can be used: parasitic elements, IxP$lx  
slots, etc. However, the microstrip antenna element with the (ds*$]  
widest bandwidth (a variation of the aperture-fed stacked-patch /[3!kW  
element) is about 40–50%. This antenna, an aperture-fed stacked jaTCRn3|<  
patch, has a relatively poor front-to-back ratio, due to the fact RvW>kATb_F  
that it has a slot in the ground plane. In this paper, a new type '?|.#D#-c  
of patch element is presented. The patch is suspended over the ?!34qh  
ground plane and supported by a nonconductive pin. It is fed ?$7$# DX  
by a three-dimensional (3-D) transition connecting the patch to a a 8jG')zg  
perpendicular connector. The typical bandwidth of this element @[(%b{TE;  
(in terms of VSWR) is 90%. When built .. bF@iO316H  
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