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首页> 外文期刊>Microwaves, Antennas & Propagation, IET >Low-profile triple-band microstrip antenna via sharing a single multi-mode patch resonator
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Low-profile triple-band microstrip antenna via sharing a single multi-mode patch resonator

机译：通过共享单个多模贴片谐振器实现低剖面三频微带天线

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摘要

A low-profile microstrip patch antenna (MPA) operating in triple WLAN bands (2.4 /5.2 /5.8 GHz) with stable broadside radiation is proposed by employing TM10, TM12, and TM30 modes. Firstly, the TM12 mode of the MPA could be excited at around 5.8 GHz by properly selecting its dimensions. Meanwhile, a linear slot is etched out at the center of the radiating patch to transform the radiated fields of TM12 and TM30 modes into the broadside radiation with low sidelobe level. Secondly, the shorting pins are symmetrically loaded underneath the patch, aiming to improve the input impedance matching of TM10 mode and push up its resonant frequency to around 2.4 GHz. Thirdly, a pair of parallel slots is near the radiating edges of the patch radiator, thus extending the surface current distribution of TM30 mode and reallocating its resonant frequency to around 5.2 GHz. In final, the prototype antenna is fabricated and measured to validate its working principle. The results illustrate that this low-profile MPA makes these three radiative modes resonate at around 2.44, 5.22, and 5.82 GHz, respectively. Most importantly, a stable normal radiation pattern with low cross-polarisation and sidelobe levels is maintained for the proposed antenna as well.
机译：通过采用TM10，TM12和TM30模式，提出了在具有稳定宽边辐射的三重WLAN频带（2.4 /5.2 /5.8 GHz）中运行的薄型微带贴片天线（MPA）。首先，通过适当选择尺寸，可以在5.8 GHz左右激发MPA的TM12模式。同时，在辐射贴片的中心蚀刻出一个线性缝隙，以将TM12和TM30模的辐射场转换为具有低旁瓣水平的宽边辐射。其次，短路针脚对称地加载在贴片下方，旨在改善TM10模式的输入阻抗匹配，并将其谐振频率推高至2.4 GHz左右。第三，一对平行槽靠近贴片辐射器的辐射边缘，从而扩展了TM30模式的表面电流分布，并将其谐振频率重新分配到5.2 GHz左右。最后，制造并测量原型天线以验证其工作原理。结果表明，这种低调的MPA使得这三种辐射模式分别在2.44、5.22和5.82 GHz处产生谐振。最重要的是，对于所提出的天线，也保持了具有低交叉极化和旁瓣电平的稳定的正常辐射方向图。

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