scholarly journals New formulas for spherical wave reflection from an impedance surface

1992 ◽  
Vol 92 (4) ◽  
pp. 2432-2432
Author(s):  
Y. L. Li ◽  
Michael J. White ◽  
M. H. Hwang
Keyword(s):  
Wave Reflection ◽  
Spherical Wave ◽  
Impédance Surface ◽  
Impedance Surface

Wave reflection from a rough impedance surface

1976 ◽  
Vol 19 (3) ◽  
pp. 281-285 ◽  
Author(s):  
V. D. Freilikher ◽  
I. M. Fuks
Keyword(s):  
Wave Reflection ◽  
Impédance Surface ◽  
Impedance Surface

scholarly journals Impedance Enhancement of Textile Grounded Loop Antenna Using High-Impedance Surface (HIS) for Healthcare Applications

Sensors ◽  
2020 ◽  
Vol 20 (14) ◽  
pp. 3809
Author(s):  
Mohammed M. Bait-Suwailam ◽  
Isidoro I. Labiano ◽  
Akram Alomainy
Keyword(s):  
Impedance Matching ◽  
Loop Antenna ◽  
Healthcare Applications ◽  
Impédance Surface ◽  
Antenna Structure ◽  
Impedance Surface ◽  
High Impedance ◽  
Low Profile ◽  
Close Proximity ◽  
High Impedance Surface

In this paper, impedance matching enhancement of a grounded wearable low-profile loop antenna is investigated using a high-impedance surface (HIS) structure. The wearable loop antenna along with the HIS structure is maintained low-profile, making it a suitable candidate for healthcare applications. The paper starts with investigating, both numerically and experimentally, the effects of several textile parameters on the performance of the wearable loop antenna. The application of impedance enhancement of wearable grounded loop antenna with HIS structure is then demonstrated. Numerical full-wave simulations are presented and validated with measured results. Unlike the grounded wearable loop antenna alone with its degraded performance, the wearable loop antenna with HIS structure showed better matching performance improvement at the 2.45 GHz-band. The computed overall far-field properties of the wearable loop antenna with HIS structure shows good performance, with a maximum gain of 6.19 dBi. The effects of bending the wearable loop antenna structure with and without HIS structure as well as when in close proximity to a modeled human arm are also investigated, where good performance was achieved for the case of the wearable antenna with the HIS structure.

Adaptive High Impedance Surface for Prevention of Waveguide’s High-Intensity Wave

2021 ◽  
pp. 1-1
Author(s):  
Jihong Zhang ◽  
N. Hu ◽  
Z. F. Wu ◽  
B. W. Deng ◽  
M. T. Lin ◽  
...  
Keyword(s):  
High Intensity ◽  
Impédance Surface ◽  
Impedance Surface ◽  
High Impedance ◽  
High Impedance Surface ◽  
Intensity Wave

Guidance characteristics of two-dimensionally periodic impedance surface

1999 ◽  
Vol 47 (12) ◽  
pp. 2503-2511 ◽  
Author(s):  
Ruey Bing Hwang ◽  
Song Tsuen Peng
Keyword(s):  
Impédance Surface ◽  
Impedance Surface
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