Design of a compact low profile high-gain UHF antenna using High-Impedance Surfaces

2014 ◽  
Author(s):  
Nora Mohamed Mohamed-Hicho ◽  
Eva Antonino-Daviu ◽  
Marta Cabedo-Fabres ◽  
Miguel Ferrando-Bataller
Keyword(s):  
High Gain ◽  
High Impedance ◽  
Low Profile ◽  
Uhf Antenna

Comparison of wideband High-Impedance Surfaces for low-profile high-gain UHF antenna design

2015 ◽  
Author(s):  
Nora Mohamed Mohamed-Hicho ◽  
Eva Antonino-Daviu ◽  
Marta Cabedo-Fabres ◽  
Miguel Ferrando-Bataller ◽  
Daniel Sanchez-Escuderos
Keyword(s):  
High Gain ◽  
Antenna Design ◽  
High Impedance ◽  
Low Profile ◽  
Uhf Antenna

scholarly journals A novel low profile high-gain UHF antenna using High-Impedance Surfaces

2014 ◽  
Author(s):  
Nora Mohamed Mohamed-Hicho ◽  
Eva Antonino-Daviu ◽  
Marta Cabedo-Fabres ◽  
Miguel Ferrando-Bataller
Keyword(s):  
High Gain ◽  
High Impedance ◽  
Low Profile ◽  
Uhf Antenna

scholarly journals A Novel Low-Profile High-Gain UHF Antenna Using High-Impedance Surfaces

2015 ◽  
Vol 14 ◽  
pp. 1014-1017 ◽  
Author(s):  
Nora Mohamed Mohamed-Hicho ◽  
Eva Antonino-Daviu ◽  
Marta Cabedo-Fabres ◽  
Miguel Ferrando-Bataller
Keyword(s):  
High Gain ◽  
High Impedance ◽  
Low Profile ◽  
Uhf Antenna

scholarly journals H-plane horn antenna with enhanced directivity using conformal transformation optics

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hossein Eskandari ◽  
Juan Luis Albadalejo-Lijarcio ◽  
Oskar Zetterstrom ◽  
Tomáš Tyc ◽  
Oscar Quevedo-Teruel
Keyword(s):  
Conformal Transformation ◽  
Phase Error ◽  
Three Dimensional ◽  
Physical Space ◽  
Horn Antenna ◽  
High Gain ◽  
Transformation Optics ◽  
Graded Index ◽  
Low Profile ◽  
Dielectric Lens

AbstractConformal transformation optics is employed to enhance an H-plane horn’s directivity by designing a graded-index all-dielectric lens. The transformation is applied so that the phase error at the aperture is gradually eliminated inside the lens, leading to a low-profile high-gain lens antenna. The physical space shape is modified such that singular index values are avoided, and the optical path inside the lens is rescaled to eliminate superluminal regions. A prototype of the lens is fabricated using three-dimensional printing. The measurement results show that the realized gain of an H-plane horn antenna can be improved by 1.5–2.4 dB compared to a reference H-plane horn.

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.

Mutual coupling reduction of low-profile monopole antennas on high-impedance ground plane

2002 ◽  
Vol 38 (16) ◽  
pp. 849 ◽  
Author(s):  
H. Xin ◽  
K. Matsugatani ◽  
M. Kim ◽  
J. Hacker ◽  
J.A. Higgins ◽  
...  
Keyword(s):  
Mutual Coupling ◽  
Ground Plane ◽  
High Impedance ◽  
Low Profile ◽  
Monopole Antennas ◽  
Mutual Coupling Reduction
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