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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >A dual-band dual-mode microstrip Yagi antenna with quasi-end-fire radiation
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A dual-band dual-mode microstrip Yagi antenna with quasi-end-fire radiation

机译：具有准端火辐射的双频双模微带八木天线

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摘要

A dual-band dual-mode microstrip Yagi antenna with quasi-end-fire radiationpatterns is proposed in this paper. It consists of five radiating patches drivenby a single slot-loaded patch placed in the middle. Meanwhile, two slot-loadedparasitic patches are symmetrically located on two sides of the driven patch,respectively. In the lower band, the five patches involved resonate at TM_(01)mode. While in the upper band, all the patches resonate at TM_(02) mode. Inorder to ensure quasi-end-fire radiations in the both bands, four slots are symmetricallyetched around the strongest surface currents of each patch resonatingat TM_(02) mode. As a result, the resonant frequency of TM_(02) mode isdecreased dramatically, while the resonant frequency of TM_(01) mode almostremains unchanged. With these arrangements, the separations between anytwo of the adjacent patches at their centers satisfy the requirements in designof the microstrip Yagi antenna in both bands, so as to realize the dual-banddual-mode microstrip Yagi antenna on a single-layer substrate. Finally, anantenna prototype is fabricated and tested. The measured results reveal thatthe dual operating bands of 2.76～2.88 and 4.88～5.03 GHz for |S_(11)| < −10 dBare satisfactorily achieved. Most importantly, the proposed antenna can indeedrealize the quasi-end-fire radiation patterns in dual operating bands.
机译：本文提出了一种具有准端火辐射图的双频双模微带八木天线。它由五个辐射贴片组成，这些辐射贴片由放置在中间的单个插槽加载贴片驱动。同时，两个槽加载的寄生贴片分别对称地位于从动贴片的两侧。在较低频带中，所涉及的五个音色在TM_（01）模式下产生谐振。在较高频段时，所有面片均在TM_（02）模式下谐振。为了确保两个频带中的准端火辐射，围绕每个贴片以TM_（02）模式共振的最强表面电流对称蚀刻四个槽。结果，TM_（02）模式的谐振频率急剧降低，而TM_（01）模式的谐振频率几乎保持不变。通过这些布置，相邻两个贴片在其中心处的间隔都满足了在两个频带中设计微带八木天线的要求，从而在单层基板上实现了双频模微带八木天线。最后，制造并测试了天线原型。测量结果表明，| S_（11）|的双工作频带为2.76〜2.88和4.88〜5.03 GHz。令人满意地达到了<-10 dB。最重要的是，提出的天线确实可以在双工作频带中实现准端向火辐射方向图。

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