scholarly journals Conformal Design of a High-Performance Antenna for Energy-Autonomous UWB Communication

Sensors ◽  
2021 ◽  
Vol 21 (17) ◽  
pp. 5939
Author(s):  
Shobit Agarwal ◽  
Diego Masotti ◽  
Symeon Nikolaou ◽  
Alessandra Costanzo
Keyword(s):  
High Frequency ◽  
High Performance ◽  
Future Generation ◽  
Ultra Wideband ◽  
Archimedean Spiral ◽  
Distributed Sensors ◽  
High Impedance ◽  
Low Profile ◽  
Background Material ◽  
High Impedance Surface

In view of the need for communication with distributed sensors/items, this paper presents the design of a single-port antenna with dual-mode operation, representing the front-end of a future generation tag acting as a position sensor, with identification and energy harvesting capabilities. An Archimedean spiral covers the lower European Ultra-Wideband (UWB) frequency range for communication/localization purposes, whereas a non-standard dipole operates in the Ultra High Frequency (UHF) band to wirelessly receive the energy. The versatility of the antenna is guaranteed by the inclusion of a High Impedance Surface (HIS) back layer, which is responsible for the low-profile stack-up and the insensitivity to the background material. A conformal design, supported by 3D-printing technology, is pursued to check the versatility of the proposed architecture in view of any application involving its deformation and tracking/powering operations.

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.

scholarly journals Low Profile Fully Planar Folded Dipole Antenna on a High Impedance Surface

2012 ◽  
Vol 60 (1) ◽  
pp. 51-62 ◽  
Author(s):  
Andrea Vallecchi ◽  
Javier R. De Luis ◽  
Filippo Capolino ◽  
Franco De Flaviis
Keyword(s):  
Dipole Antenna ◽  
Impédance Surface ◽  
Impedance Surface ◽  
High Impedance ◽  
Low Profile ◽  
Folded Dipole ◽  
High Impedance Surface

scholarly journals Low Profile EBG Resonator Antennas

2009 ◽  
Vol 2009 ◽  
pp. 1-7 ◽  
Author(s):  
R. Chantalat ◽  
L. Moustafa ◽  
M. Thevenot ◽  
T. Monediere ◽  
B. Jecko
Keyword(s):  
Frequency Selective Surface ◽  
Theory Approach ◽  
High Impedance ◽  
Full Wave ◽  
Half Wavelength ◽  
Low Profile ◽  
Artificial Magnetic Conductors ◽  
Full Wave Analysis ◽  
Small Antenna ◽  
High Impedance Surface

An Electromagnetic Band Gap (EBG) antenna is a planar structure which is composed of a cavity and an EBG material. In most applications, the height of the EBG antenna is half wavelength. We present in this paper the conditions to reduce the profile of an EBG antenna to subwavelength values. It could be achieved by using a cavity upper interface which exhibits negative reflection phase. Frequency Selective Surface (FSS) based on Babinet principle, that satisfies this condition, will be described using full wave analysis. These periodic metallic arrays are employed in the design of a low profile EBG antenna which has a directivity of 10 dBi. As this EBG antenna design is similar to a small antenna over an Artificial Magnetic Conductors (AMC) surfaces or High Impedance Surface (HIS), the EBG antenna principle could be a new theory approach for the AMC or HIS. This point is discussed in this paper.

Electromagnetic Bandgap Structure by Low Temperature Co-Fired Ceramics Technology

2011 ◽  
Vol 287-290 ◽  
pp. 377-381
Author(s):  
Xiao Qing Zhang ◽  
Bo Li ◽  
Xin Feng Pang ◽  
Jing Bo Sun ◽  
Jun Wu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Ultra Wideband ◽  
Network Analyzer ◽  
Micro Structure ◽  
Electromagnetic Bandgap ◽  
High Impedance ◽  
The Matrix ◽  
High Impedance Surface ◽  
Scanning Electron ◽  
Electromagnetic Bandgap Structure

A EBG（Electromagnetic Bandgap） structure was prepared based on the theory of the high impedance surface photonic crystal and the HFSS emulating results. The measurement result showed that the bandgap of the EBG structure was in the Ultra Wideband range. The designed structure was fabricated by a method of low temperature co-fired ceramics technology（LTCC） using ceramics as the matrix and silver as the coils. The micro-structure was analyzed by microscope and scanning electron microscope which showed that these two kinds of materials were well connected. A bandgap between 4GHz~5.5GHz was found by the Vector Network Analyzer which was accord to the emulation.

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