Ali Chami | Lol - Academia.edu (original) (raw)
Address: Casablanca, Region du Grand Casablanca, Morocco
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In this paper, a novel antenna array with UWB properties is presented. A slot antenna backed with... more In this paper, a novel antenna array with UWB properties is presented. A slot antenna backed with a metallic cavity is used as elementary cell to provide a low profile and directive linear array antenna. Its transient characteristics are obtained from time domain measurement setup and both time and frequency domain characteristics are calculated and discussed. This antenna, including the power divider, exhibits a bandwidth covering the FCC band for a V SWR <;2 and a gain >; 5dBi. Low distortion behavior is highlighted by the analysis of the fidelity factor which points out the linearity of the transfer function.
Microwave and Optical Technology Letters, 2009
A spiral antenna matched to a SAW sensor for blood pressure and body temperature monitoring is pr... more A spiral antenna matched to a SAW sensor for blood pressure and body temperature monitoring is proposed. As the antenna/SAW device is dedicated to be implanted in a human body, a small antenna with omnidirectional pattern is required. The proposed structure has a total area of 4 × 2.5 mm2 and a 1.1 mm height. To take into account the human body effect, we use a homogenous phantom with a dielectric permittivity of 52 and a conductivity of 1.74 S/m. The −10 dB impedance bandwidth of the proposed antenna is 66% from 2.22 to 3.83 GHz; moreover, a quasi-isotropic radiation pattern is achieved. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2286–2293, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24622
Gestion de la Relation Client (GRC) correspond à l'expression anglaise Customer Relationship Mana... more Gestion de la Relation Client (GRC) correspond à l'expression anglaise Customer Relationship Management (CRM).
In this paper, a novel antenna array with UWB properties is presented. A slot antenna backed with... more In this paper, a novel antenna array with UWB properties is presented. A slot antenna backed with a metallic cavity is used as elementary cell to provide a low profile and directive linear array antenna. Its transient characteristics are obtained from time domain measurement setup and both time and frequency domain characteristics are calculated and discussed. This antenna, including the power divider, exhibits a bandwidth covering the FCC band for a V SWR <;2 and a gain >; 5dBi. Low distortion behavior is highlighted by the analysis of the fidelity factor which points out the linearity of the transfer function.
Microwave and Optical Technology Letters, 2009
A spiral antenna matched to a SAW sensor for blood pressure and body temperature monitoring is pr... more A spiral antenna matched to a SAW sensor for blood pressure and body temperature monitoring is proposed. As the antenna/SAW device is dedicated to be implanted in a human body, a small antenna with omnidirectional pattern is required. The proposed structure has a total area of 4 × 2.5 mm2 and a 1.1 mm height. To take into account the human body effect, we use a homogenous phantom with a dielectric permittivity of 52 and a conductivity of 1.74 S/m. The −10 dB impedance bandwidth of the proposed antenna is 66% from 2.22 to 3.83 GHz; moreover, a quasi-isotropic radiation pattern is achieved. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2286–2293, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24622
Gestion de la Relation Client (GRC) correspond à l'expression anglaise Customer Relationship Mana... more Gestion de la Relation Client (GRC) correspond à l'expression anglaise Customer Relationship Management (CRM).