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A novel ellipse cavity-backed and slot-tuned bow-tie antenna was designed to facilitate the application of ultra-wide band (UWB) ground penetrating radar (GPR) in low frequency. Lumped resistor loading was applied at the end of antenna arms to broaden the impedance bandwidth. Taper tuned method was also used to optimize the current distribution. Antenna characteristic was analyzed by simulation. Finally,...
In this paper, a vital sign feature (V SF) detection and search strategy using multiple UWB life-detection-radars with different locations is proposed. Firstly, the different VSFs from all single UWB life-detection radars placed on multiple radar observation points are categorized. Then, the proposed detection strategy is used for the different VSF categories. Finally, the target's spatial location...
Lunar Regolith Penetrating Radar (LRPR) is a high resolution penetrating and imaging radar, which is a main payload onboard the detector of Chang'E-5. It is mounted on the bottom of the detector of Chang'E-5 and its main task is to survey the lunar regolith thickness and subsurface structure of landing domain. Because the detector is static, LRPR has to work only in stationary condition and is designed...
In this paper, according to the two design principles of uniform distribution and less element shadowing for effective aperture, a novel two-dimensional (2-D) sparse ultra-wideband (UWB) multiple-input-multiple-output (MIMO) antenna array topology is proposed for near-field high-resolution imaging. Compared with another different array having the same number of transceivers, the proposed optimal array...
A high-efficiency scheme based on both time division multiplexing (TDM) and parallel processing of FPGA is proposed in this paper to address the problem of high scanning rate in high-speed measurements with UWB array GPR. The merit of this new scheme is that all trigger signals of all the channels can be delayed in a controllable step through the same delay chip at different times. Each channel of...
This paper describes an array antenna system for lunar regolith penetrating radar (LRPR), which is an important payload onboard the lander of Chang'E-5. The array's proposed operational frequency range is from 1000MHz ∼ 3000MHz. It has 12 elements arrayed along their H plane. The elements are designed into a compact Vivaldi antenna with 1/4 elliptical slot in order to realize the need for ultra-wideband,...
We report 480km transmission of C-band 80×453.2Gb/s PDM-eOFDM hybrid 8–64QAM DWDM signals over G.652 fiber and EDFA-only link at 9b/s/Hz spectral efficiency based on silicon IQ modulator and 84.48G sample/s DAG
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