High Efficient and Ultra Wide Band Monopole Antenna for Microwave Imaging and Communication Applications
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School of Electronic and Information Engineering, Beihang University, Beijing 100191, China
2
Beijing Key Laboratory for Microwave Sensing and Security Applications, Beihang University, Beijing 100191, China
3
College of Electronics and Information Engineering, Shenzhen University, Shenzhen 518060, China
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(1), 115; https://doi.org/10.3390/s20010115
Received: 5 November 2019
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Revised: 17 December 2019
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Accepted: 18 December 2019
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Published: 23 December 2019
(This article belongs to the Special Issue Ultra Wideband (UWB) Systems in Biomedical Sensing)
The paper presents a highly efficient, low cost, ultra-wideband, microstrip monopole antenna for microwave imaging and wireless communications applications. A new structure (z-shape, ultra-wideband (UWB) monopole) is designed, which consists of stepped meander lines to achieve super-wide bandwidth and high efficiency. Three steps are used to design the proposed structure for the purpose to achieve high efficiency and wide bandwidth. The antenna bandwidth is enhanced by varying the length of meander line slots, optimization of the feeding line and with the miniaturization of the ground width. The simulated and measured frequency bands are 2.7–22.5 GHz and 2.8–22.7 GHz (156% fractional bandwidth), respectively. The dimensions of the antenna are 38 mm × 35 mm × 1.57 mm, and its corresponding electrical size is 2.41 λg × 2.22 λg × 0.09 λg, where guided wavelength λg is at the center frequency (12.75 GHz). This antenna achieved a high bandwidth ratio (8.33:1). The realized gain is varying from 1.6–6.4 dBi, while that of efficiency is 70% to 93% for the whole band. Radiation patterns are measured at four operating frequencies. It has an acceptable group delay, fidelity factor, and phase variation results that satisfy the limit of ultra-wideband in the form of the time domain.
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Keywords:
bandwidth ratio; high efficiency; meander lines; monopole ultra-wideband (UWB) antenna; microwave imaging
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MDPI and ACS Style
Ullah, S.; Ruan, C.; Sadiq, M.S.; Haq, T.U.; He, W. High Efficient and Ultra Wide Band Monopole Antenna for Microwave Imaging and Communication Applications. Sensors 2020, 20, 115. https://doi.org/10.3390/s20010115
AMA Style
Ullah S, Ruan C, Sadiq MS, Haq TU, He W. High Efficient and Ultra Wide Band Monopole Antenna for Microwave Imaging and Communication Applications. Sensors. 2020; 20(1):115. https://doi.org/10.3390/s20010115
Chicago/Turabian StyleUllah, Shahid, Cunjun Ruan, Muhammad S. Sadiq, Tanveer U. Haq, and Wenlong He. 2020. "High Efficient and Ultra Wide Band Monopole Antenna for Microwave Imaging and Communication Applications" Sensors 20, no. 1: 115. https://doi.org/10.3390/s20010115
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