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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >Coaxial cavity waveguide antennas excited by stacked circularrnmicrostrip patches for use as prime-focus reflector feeds
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Coaxial cavity waveguide antennas excited by stacked circularrnmicrostrip patches for use as prime-focus reflector feeds

机译：被堆叠的圆形微带贴片激发的同轴腔波导天线，用作主要焦点反射器馈源

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摘要

A coaxial cavity antenna excited by a stacked circular microstrip antenna is investigatedrnas a feed for prime-focus parabolic reflector antennas. The radiation pattern ofrnthe proposed cavity-backed antenna is saddle shaped, which widens the 210 dBrnbeamwidths and increases the reflector efficiency especially for deep reflectors withrnsmall focal length-to-diameter ratios. With a single-probe feed, the co-polar radiationrnpattern is slightly asymmetric in the E-plane, but is made symmetric by a differentialrnfeeding technique, using two probes. The impedance bandwidth of the proposed feedrnantenna is 20%. The antenna was fabricated and tested, and it exhibited good agreementrnbetween simulation and measurement results. The gain factor of the feed wasrnalso studied with a circular-symmetric reflector and provided a gain factor of 79% atrnf/D50.375. This type of feed can be used as an alternative to conventional horn orrnwaveguide feeds, where reduced size and light-weight are desirable with addedrnadvantage of easy integration with electronics.
机译：研究了由叠置的圆形微带天线激励的同轴腔天线，作为抛物面抛物面反射天线的馈源。拟议中的背腔天线的辐射方向图是马鞍形的，这扩大了210 dBrn的波束宽度并提高了反射器效率，特别是对于焦距长径比较小的深反射器。对于单探头进给，同极辐射图在E平面中略微不对称，但通过差分进给技术使用两个探针使其对称。拟议的馈电天线的阻抗带宽为20％。天线经过制作和测试，在仿真和测量结果之间表现出良好的一致性。还使用圆形对称反射镜研究了进料的增益因子，并提供了79％atrnf / D50.375的增益因子。这种类型的馈电可以用作常规喇叭或波导波导馈电的替代产品，在这种情况下，希望减小尺寸和减轻重量，并具有易于与电子设备集成的优势。

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