Shangbang Luo

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An Antipodal Vivaldi Antenna to be used in ultra wideband Medical imaging system is presented in this paper. A new high order power exponential function was used in the design of the proposed antenna, and the measurements showed that the in-band return loss is below -10 dB from 1GHz to12GHz. The experimental result indicates that the antenna is capable of(More)
A circuit design of Ultra-Wideband (UWB) transient source based on avalanche transistor is presented in this paper. Under a 20V voltage supply, a 1ns pulse width and 12V maximal amplitude periodic pulse is achieved. Experimental results show the pulse width is 1.2ns and the peak amplitude is 14V.In addition, the signal waveform is simple, and the energy(More)
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