Design and Implementation of Sub-GHz Transmitter for Ultra-Wideband Through-Wall Radar
Ultra-wideband (UWB) transmitters for through-wall radars operating in sub-GHz frequency may enable better penetrating ability and lower attenuation than devices utilizing signals above 1 GHz frequencies. In this paper, the crucial parameter of sub-GHz unipolar pulse width is investigated by theoretical analysis and experiment. Based on these parameter data, in order to radiate the signal effectively and reduce the ringing, we design a fifth-order parallel LC high-pass filter. It shapes the unipolar pulse into the bipolar pulse which has no direct current component and slight ringing. The transmitter circuit is implemented and tested. Results indicate that it generates sub-GHz UWB pulses with 2.6 ns temporal width and 744 MHz frequency bandwidth, which appears to be suitable for the through-wall radar.
Wu Qing Zheng Kuangyu Li Qiao Xiong Huagang
School of Electronic and Information Engineering, Beihang University Beijing, 100191, P.R.China
国际会议
南京
英文
1-4
2010-09-20（万方平台首次上网日期，不代表论文的发表时间）