This letter proposes an ultrawideband (UWB) transmitter for a UWB primary impulse radar that is designed for real-time pedestrian localization. The proposed transmitter applies a novel combination of a UWB pulse generator followed by a UWB amplifier to boost output pulse amplitude, which is able to be turned off automatically after one pulse transmission in order to reduce power consumption. The transmitter has been fabricated using 45-nm SOI CMOS technology and has been measured on a printed circuit board (PCB). The produced pulses possess a high measured peak-to-peak amplitude of 425 mV and a width of around 600 ps. The power spectral density (PSD) of the pulse achieves a maximum of −41 dBm/MHz at 6 GHz with a −10-dB bandwidth of 4.5 GHz from 3.3 to 7.8 GHz that assures that the proposed transmitter complies with the regulation of the U.S. Federal Communications Commission (FCC) for UWB outdoor applications. The pulse generator consumes around 10 pJ/pulse from a 1-V supply, which is very low among the similar designs, and remains almost constant with an increasing pulse repetition time (PRT).

中文翻译：

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一种用于主雷达系统的具有自动 scOn-Off 功能的高效超宽带脉冲发射器

这封信提出了一种用于 UWB 初级脉冲雷达的超宽带 (UWB) 发射器，该雷达专为实时行人定位而设计。所提出的发射器采用了 UWB 脉冲发生器和 UWB 放大器的新颖组合来提高输出脉冲幅度，它能够在一个脉冲发射后自动关闭以降低功耗。发射器采用 45 纳米 SOI CMOS 技术制造，并在印刷电路板 (PCB) 上进行了测量。产生的脉冲具有 425 mV 的高测量峰峰值和大约 600 ps 的宽度。脉冲的功率谱密度 (PSD) 在 6 GHz 时达到最大 -41 dBm/MHz，3.3 至 7.8 GHz 的 -10-dB 带宽为 4.5 GHz，确保提议的发射机符合美国的规定 联邦通信委员会 (FCC) 用于 UWB 户外应用。脉冲发生器从 1 V 电源消耗大约 10 pJ/脉冲，这在类似设计中非常低，并且随着脉冲重复时间 (PRT) 的增加几乎保持不变。