scholarly journals AN ULTRA-WIDEBAND MODIFIED VIVALDI ANTENNA APPLIED TO THROUGH THE GROUND AND WALL IMAGING

2018 ◽  
Vol 86 ◽  
pp. 111-122 ◽  
Author(s):  
Ziani Tahar ◽  
Xavier Derobert ◽  
Malek Benslama
Keyword(s):  
Ultra Wideband ◽  
Vivaldi Antenna ◽  
Wall Imaging

scholarly journals Design and Analysis of a UWB MIMO Radar System with Miniaturized Vivaldi Antenna for Through-Wall Imaging

2019 ◽  
Vol 11 (16) ◽  
pp. 1867 ◽  
Author(s):  
Zhipeng Hu ◽  
Zhaofa Zeng ◽  
Kun Wang ◽  
Weike Feng ◽  
Jianmin Zhang ◽  
...  
Keyword(s):  
Continuous Wave ◽  
Mimo Radar ◽  
Radar System ◽  
Ultra Wideband ◽  
Concrete Wall ◽  
Range Resolution ◽  
Imaging Model ◽  
Data Capturing ◽  
Vivaldi Antenna ◽  
Wall Imaging

The ultra-wideband (UWB) multi-input multi-output (MIMO) radar technique is playing a more and more important role in the application of through-wall detection because of its high resolution, lower antenna requirements, and efficient data capturing ability. This paper develops a novel UWB MIMO radar system using a stepped-frequency continuous-wave (SFCW) signal, which is designed to detect human targets behind the regular brick and concrete wall. In order to balance high range resolution and wall-penetration depth, a novel miniaturized Vivaldi antenna with desired bandwidth of 0.5–2.5 GHz was designed, simulated, manufactured, and successfully used in through-wall imaging. To suppress the artifacts in the focused image and reduce the computing complexity, the cross-correlation-based time domain back projection (CC-TDBP) algorithm was developed. In addition, a through-wall imaging model was established, based on which the effects of the wall on the refraction of electromagnetic (EM) waves and the reduction of velocity are compensated. Finally, different experiments were conducted for multiple stationary targets utilizing the designed radar system, and the improved BP-based algorithms are applied to focus the targets behind the wall more accurately. The reconstructed two-dimensional (2D) images illustrate that the designed MIMO radar system can successfully detect and image human targets in the air and behind the wall.

Modified antipodal Vivaldi antenna for ultra‐wideband communications

2016 ◽  
Vol 10 (4) ◽  
pp. 401-405 ◽  
Author(s):  
Rajesh Natarajan ◽  
Jithila V. George ◽  
Malathi Kanagasabai ◽  
Livya Lawrance ◽  
Balaji Moorthy ◽  
...  
Keyword(s):  
Ultra Wideband ◽  
Wideband Communications ◽  
Vivaldi Antenna

scholarly journals Ultrawideband Low-Profile and Miniaturized Spoof Plasmonic Vivaldi Antenna for Base Station

2020 ◽  
Vol 10 (7) ◽  
pp. 2429 ◽  
Author(s):  
Li Hui Dai ◽  
Chong Tan ◽  
Yong Jin Zhou
Keyword(s):  
Radiation Pattern ◽  
Frequency Band ◽  
High Gain ◽  
Base Station ◽  
Ultra Wideband ◽  
Radiation Patterns ◽  
Low Profile ◽  
Simulation Results ◽  
Vivaldi Antenna ◽  
Good Agreement

Stable radiation pattern, high gain, and miniaturization are necessary for the ultra-wideband antennas in the 2G/3G/4G/5G base station applications. Here, an ultrawideband and miniaturized spoof plasmonic antipodal Vivaldi antenna (AVA) is proposed, which is composed of the AVA and the loaded periodic grooves. The designed operating frequency band is from 1.8 GHz to 6 GHz, and the average gain is 7.24 dBi. Furthermore, the measured results show that the radiation patterns of the plasmonic AVA are stable. The measured results are in good agreement with the simulation results.

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