Design of UWB Antennas Integrating Geopolymer Material

2018 ◽  
Author(s):  
H. Nadir ◽  
A. Gharzouni ◽  
E. Martinod ◽  
N. Feix ◽  
O. Tantot ◽  
...  
Keyword(s):  
Uwb Antennas ◽  
Geopolymer Material

Selectivity and in-band impedance enhancement of a compact slot antenna with defected ground structures

2019 ◽  
Vol 11 (10) ◽  
pp. 1010-1016
Author(s):  
Hailong Yang ◽  
Xiaoli Xi ◽  
Lili Wang ◽  
Yuchen Zhao ◽  
Xiaomin Shi
Keyword(s):  
Reflection Coefficient ◽  
Impedance Matching ◽  
Ultra Wideband ◽  
Band Edge ◽  
Slot Antenna ◽  
Defected Ground Structure ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Uwb Antennas ◽  
Low Pass

AbstractIn this study, a new ultra-wideband (UWB) band-edge selectivity antenna with a modified radiation slot using defected ground structure (DGS) is presented to obtain bandpass filtering reflection coefficient and gain performance. The well-designed DGS is designed on backside metallic of the substrate and can be seen as a low-pass filter that provides a good roll-off at a higher frequency. By connecting the DGS and the stepped slot and making them merge with each other, good cut-off property in the upper passband and better in-band impedance characteristics are obtained. Measured results show that the proposed design not only shows good band-edge selectivity in reflection coefficient and gain performance but also has a good impedance matching of −13.5 dB reflection coefficients and a good radiation efficiency of 90% in the operating frequencies. The measured bandwidth defined with the reflection coefficient less than −10 dB is from 3.1–11.2 GHz. Furthermore, the size of the filtering UWB antenna is 22 mm × 12 mm, which is smaller than many individual UWB antennas and UWB filters.

UWB Antennas for CW Terahertz Imaging: Cross Talk Issues

2013 ◽  
pp. 473-482
Author(s):  
A. J. Kreisler ◽  
I. Türer ◽  
X. Gaztelu ◽  
A. F. Dégardin
Keyword(s):  
Cross Talk ◽  
Terahertz Imaging ◽  
Uwb Antennas
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