High-Sensitivity Millimeter-Wave Imaging Front-End Using a Low-Impedance Tapered Slot Antenna
High-Sensitivity Millimeter-Wave Imaging Front-End Using a Low-Impedance Tapered Slot Antenna
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DOI：
10.1109/tap.2011.2165504
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发表时间：
2011-08
影响因子：
5.7
通讯作者：
D. Radenamad;T. Aoyagi;A. Hirose
中科院分区：
文献类型：
--
作者：
D. Radenamad;T. Aoyagi;A. Hirose
毫米波（MMW）主动成像具有潜在的多种应用。然而，毫米波电路通常是有损耗的，放大器是昂贵的，这是一个严重的问题，特别是在阵列中使用许多前端电路并联。为了克服这一点，已经提出了一些建议，例如包络相位检测（EPD）方法，其中MMW在天线处接收之后直接检测而不放大。为了实现高灵敏度，本通信提出了一个毫米波成像前端使用散装锥形缝隙天线（散装TSA）。由于体TSA具有固有的低阻抗特性，我们可以获得高的检测功率。实验表明，采用1mm厚TSA的前端电路比采用0.06 μ mTSA的传统电路灵敏度高22dB。我们分析了前端数值阐明其特点。我们还研究了阵列配置，发现共面排列具有更高的隔离比堆叠配置。
Millimeter-wave (MMW) active imaging has potentially a variety of applications. However, MMW circuits are often lossy and amplifiers are costly, which is a serious problem in particular in arrays using many front-end circuits in parallel. To overcome this point, there have been some proposals such as the envelope phase detection (EPD) method where MMW is directly detected without amplification just after received at the antenna. To realize a high sensitivity, this communication proposes a MMW imaging front-end using a bulk tapered slot antenna (bulk TSA). Since bulk TSAs possess an intrinsically low impedance characteristic, we can obtain a high detection power. Experiments demonstrate that a front-end using 1 mm-thick TSA achieves 22 dB-higher sensitivity than a conventional circuit using 0.06 μm TSA. We analyze the front-end numerically to elucidate its characteristics. We also investigate array configurations to find that a coplanar arrangement exhibits higher isolation than a stacked configuration.