Bow-tie antenna for terahertz resonant tunnelling diode based oscillators on high dielectric constant substrate
Bow-tie antenna for terahertz resonant tunnelling diode based oscillators on high dielectric constant substrate
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DOI：
10.1109/prime.2015.7251361
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发表时间：
2015-09
期刊：
影响因子：
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通讯作者：
K. Alharbi;A. Ofiare;M. Kgwadi;A. Khalid;E. Wasige
中科院分区：
文献类型：
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作者：
K. Alharbi;A. Ofiare;M. Kgwadi;A. Khalid;E. Wasige
本文提出了一种宽带领结槽天线。将共面波导馈电天线与谐振隧道二极管（RTD）太赫兹振荡器（THz）集成在同一芯片上，该天线具有室温工作能力和较高的功率。该天线在设计频率（300 GHz）附近具有非常宽的带宽（回波损耗S11 < -10 dB）。然而，由于InP衬底的大介电常数，辐射图案会退化。提出了一种克服这一问题的方法，即在低介电常数的薄衬底下放置反射器地平面。本文报道了该技术的初步仿真结果，并在较低频率（17 GHz）下进行了实验验证，证明了该概念的可行性。
In this paper, a broadband bow-tie slot antenna is presented. The coplanar waveguide (CPW) fed antenna is fabricated on an InP substrate for same chip integration with the promising resonant tunnelling diode (RTD) terahertz (THz) oscillator which has the capability of room temperature operation and with relative high power. The antenna exhibits a very wide bandwidth (return loss S11 <;-10 dB) around the design frequency (300 GHz). However, the radiation pattern is degraded because of the large dielectric constant of the InP substrate. A technique to overcome this problem employing a reflector ground plane underneath a thin substrate of low dielectric constant is presented. Initial simulation results of this technique are reported and experimental validation at lower frequency (17 GHz) shows the feasibility of the concept.