发明名称 CYLINDRICAL FRESNEL ZONE ANTENNA WITH REFLECTIVE GROUND PLATE
摘要 <p>An antenna employs cylindrical Fresnel zone plate (CFZP) construction in combination with a reflective ground plate and a sectorial reflector to enhance antenna gain, while lowering assembly cost and improving antenna placement flexibility. By forming a surface of symmetry for the antenna, the ground plate allows the antenna to mimic the operation of a symmetrical CFZP antenna using only half the nominal number of Fresnel elements. Further, the sectorial reflector restricts radiated emissions over a desired sector angle, minimizing radiation in undesirable directions, such as toward mounting walls or other nearby surfaces that would cause unwanted signal reflections, such as might aggravate multipath signal phenomenon.</p>
申请公布号 WO2003081721(P1) 申请公布日期 2003.10.02
申请号 SG2003000059 申请日期 2003.03.26
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