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首页> 外文期刊>IEEE Journal of Solid-State Circuits >Silicon-Based Ultra-Wideband Beam-Forming
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Silicon-Based Ultra-Wideband Beam-Forming

机译:硅基超宽带束形成

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摘要

Ultra-wideband (UWB) beam-forming, a special class of multiple-antenna systems, allows for high azimuth and depth resolutions in ranging and imaging applications. This paper reports a fully integrated UWB beam-former featuring controllable true time delay and power gain. Several system and circuit level parameters and characterization methods influencing the design and testing of UWB beam-formers are discussed. A UWB beam-former prototype for imaging applications has been fabricated with the potential to yield 20 mm of range resolution and a 7° angular resolution from a four-element array with 10 mm element spacing. The UWB beam-former accomplishes a 4-bit delay variation for a total of 64 ps of achievable group delay with a 4-ps resolution, a 5-dB gain variation in 1-dB steps, and a worst case -3-dB gain bandwidth of 13 GHz. Overall operation is achieved by the integration of a 3-bit tapped delay trombone-type structure with a 4-ps variable delay resolution, a 1-bit, 32-ps fixed delay coplanar-type structure, and a variable-gain distributed amplifier. The prototype chip fabricated in a 0.18 μm BiCMOS SiGe process occupies 1.6 mm{sup}2 of silicon area and consumes 87.5 mW from a 2.5-V supply at the maximum gain setting of 10 dB.
机译:超宽带(UWB)波束成形是一类特殊的多天线系统,可在测距和成像应用中实现高方位角和深度分辨率。本文报告了一种具有可控真实时间延迟和功率增益的完全集成的UWB波束形成器。讨论了影响UWB波束形成器设计和测试的几种系统和电路级参数以及表征方法。已经制造出一种用于成像应用的UWB波束形成器原型,其潜力是从具有10 mm元素间距的四元素阵列产生20 mm的距离分辨率和7°的角分辨率。 UWB波束形成器完成4位延迟变化,可实现总共64 ps的可实现群延迟,分辨率为4 ps,以1 dB为步长增加5 dB增益,最坏情况下获得-3- dB增益13 GHz的带宽。通过集成具有4ps可变延迟分辨率的3位抽头延迟长号型结构,1位,32ps固定延迟共面型结构和可变增益分布式放大器,可以实现整体操作。用0.18μmBiCMOS SiGe工艺制造的原型芯片占用1.6 mm {sup} 2的硅面积,并且在最大增益设置为10 dB时,从2.5V电源消耗87.5 mW的功率。

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