Searched for: author%3A%22Syed%2C+W.H.%22
(1 - 14 of 14)
document
Cavallo, D. (author), Syed, W.H. (author), Neto, A. (author)
In this work we report on the design, manufacturing and testing of a dual-polarized array of connected slots radiating in the presence of an artificial dielectric superstrate. The prototype array consists of 512 elements, i.e. 16×16 connected slots for each of the two polarizations. The antenna array is realized with a single multi-layer printed...
conference paper 2018
document
Cavallo, D. (author), Syed, W.H. (author), Neto, A. (author)
In this work we report on the design, manufacturing and testing of a dual-polarized array of connected slots radiating in the presence of an artificial dielectric superstrate. The prototype array consists of 512 elements, i.e. 16×16 connected slots for each of the two polarizations. The antenna array is realized with a single multi...
journal article 2018
document
Cavallo, D. (author), Syed, W.H. (author), Neto, A. (author)
At millimeter and sub-millimeter wave frequencies, electronic circuits and antennas are often located on the same semiconductor chip to facilitate their interconnection. However, on-chip antennas are characterized by very poor radiation efficiency and extremely narrow bandwidth. This is because they are situated at small electrical distance...
conference paper 2017
document
Cavallo, D. (author), Syed, W.H. (author), Neto, A. (author)
We propose a radiation concept to realize phased arrays with wideband and wide-scanning performance. The array is based on connected-slot elements that radiate in the presence of artificial dielectric superstrates. The array can be implemented with a single multi-layer printed circuit board. Artificial dielectrics are used in place of real...
conference paper 2016
document
Cavallo, D. (author), Syed, W.H. (author), Neto, A. (author)
On-chip antennas operating in the THz frequency range are characterized by narrow bandwidth and poor radiation efficiency. This is because they are electrically very close to the ground plane that is used to shield the antenna from the lossy substrate. In this work we propose a novel approach to increase the efficiency and the bandwidth of...
conference paper 2016
document
Cavallo, D. (author), Pascual Laguna, A. (author), Syed, W.H. (author)
We present an approach to realize wideband and low-loss antennas and antenna arrays on chip. The radiators are loaded with an artificial dielectric superstrate to improve the bandwidth and the overall efficiency. An example of design is proposed, consisting of an array of connected-dipole elements operating in a frequency band around 300 GHz....
conference paper 2016
document
Cavallo, D. (author), Syed, W.H. (author), Neto, A. (author)
In this paper, we present an analysis of the edge effects in wideband connected arrays of slots and dipoles. Due to the strong mutual coupling between the elements, these arrays can support the propagation of guided waves along their surface. Such waves arise from the edges of the finite array and can be<br/>especially detrimental to the...
journal article 2016
document
Syed, W.H. (author), Cavallo, D. (author), Thippur Shivamurthy, H. (author), Neto, A. (author)
Microwave broadband wide-scan antenna arrays are typically implemented resorting to vertical arrangements of printed circuit boards (PCBs). Here, we propose a planar solution realized with a single multi-layer PCB, with consequent reduction in cost and complexity of the array. It consists of an array of connected slots backed by a metallic...
journal article 2016
document
Syed, W.H. (author), Cavallo, D. (author), Neto, A. (author)
In this paper, we present an overview of our recent works on artificial dielectric layers (ADLs), used to enhance the radiation efficiency of planar printed antennas and arrays. The artificial material is realized by introducing planar sub-resonant metallic inclusions in a host material. This allows to enhance the permittivity of the host...
conference paper 2016
document
Syed, W.H. (author)
Planar printed antenna technologies, due to their light weight, low profile, cost effectiveness and ease of connection with the active devices (e.g., amplifiers etc.), are becoming an attractive solution for the commercial data-hungry applications, such as 60 GHz high-data rate communication. Another commercial application of planar antennas...
doctoral thesis 2015
document
Syed, W.H. (author), Fiorentino, G. (author), Cavallo, D. (author), Spirito, M. (author), Sarro, Pasqualina M (author), Neto, A. (author)
In this paper, we demonstrate, at 300 GHz and with integrated technology, the effectiveness of artificial dielectric layers to enhance the front-to-back ratio of printed antennas. This concept was previously proposed at microwave frequencies and using printed circuit board technology. The artificial material is now realized by introducing non...
journal article 2015
document
Cavallo, D. (author), Syed, W.H. (author), Thippur Shivamurthy, H. (author), Neto, A. (author)
We present a novel concept for wideband, wide-scan phased array applications. The array is composed by connected-slot elements loaded with artificial dielectric superstrates. The proposed solution consists of a single multi-layer planar printed circuit board (PCB) and does not require the typically employed vertical arrangement of multiple PCBs....
conference paper 2015
document
Cavallo, D. (author), Syed, W.H. (author), Neto, A. (author)
We present an analytical method to model artificial dielectric layers (ADLs) of finite height. Starting from the closed-form solution for the scattering from a single layer under plane wave illumination, the formulation is extended to the multi-layer case, by including the higher-order interaction between parallel layers in analytical form. The...
conference paper 2015
document
Syed, W.H. (author), Neto, A. (author), Cavallo, D. (author)
poster 2013
Searched for: author%3A%22Syed%2C+W.H.%22
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