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Mohammed Husseini

Mohammed Husseini
Beirut Research & Innovation Center and American University of Beirut

Ph.D. in Electrical and Computer Engineering
Co-founder and Research Director with Beirut Research & Innovation Center, Lecturer with American University of Beirut

About

130
Publications
38,284
Reads
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1,039
Citations
Introduction
Mohammed Husseini is a co-founder and a research program director with Beirut Research and Innovation Center, and a lecturer with the ECE Department of the American University of Beirut. Mohammed's research focus is on material characterization, machine learning for applications in electromagnetics and in communications, cognitive radio, antenna design and RF design. He has authored/coauthored 5 book chapters and more than 120 refereed journal and conference papers.
Additional affiliations
September 2013 - January 2014
University of New Mexico
Position
  • Visiting Researcher
July 2012 - August 2021
Lebanese Center for Studies and Research
Position
  • Managing Director
February 2012 - July 2012
American University of Beirut
Position
  • PostDoc Position

Publications

Publications (130)
Chapter
Full-text available
An increasing demand for radio spectrum has resulted from the emergence of feature-rich and high-data-rate wireless applications. The spectrum is scarce, and the current radio spectrum regulations make its use inefficient. This necessitates the development of new dynamic spectrum allocation policies to better exploit the existing spectrum. Accordi...
Article
Full-text available
The design of filter antennas with reconfigurable band stops is proposed. They are meant for employment in ultrawideband cognitive radio (UWB-CR) systems, where unlicensed users communicate using adaptive pulses that have nulls in the bands used by licensed users. Neural networks or circuits implementing the Parks-McClellan algorithm can generate s...
Article
Full-text available
In this paper, a low-cost multiband printed-circuit-board (PCB) antenna that employs Koch fractal geometry and tunability is demonstrated. The antenna is fabricated on a 1.6mm-thick FR4-epoxy substrate with dimensions 4cm × 4.5cm, is microstrip-line fed and has a partial ground plane flushed with the feed line. The proposed antenna is simulated usi...
Preprint
Full-text available
In this paper, a waveguide-based dielectric sensing technique for the measurement of the relative permittivity of planar low-loss materials is presented. The material under test (MUT), assumed to be thicker than one half of wavelength (λg/2), is sandwiched between the waveguide's aperture and a matched load. The reflected voltage magnitude is measu...
Article
Full-text available
This paper presents the use of machine learning (ML) to facilitate the design of dielectric-filled Slotted Waveguide Antennas (SWAs) with specified sidelobe levels. Conventional design methods for air-filled SWAs require the simultaneous solving of complex equations to deduce the antenna’s design parameters, which typically requires further manual...
Article
Full-text available
As virtual reality (VR) tools continue to improve, more fields are finding ways of implementing the technology to take advantage of training opportunities that reduce costs, alleviate logistical challenges , and more. Where humanitarian deminers must prepare for dangerous work, VR facilitates training that minimizes the danger while giving trainers...
Article
Full-text available
This article presents a complete design procedure for planar slotted waveguide antennas (SWA). For a desired sidelobe level ratio (SLR), the proposed method provides a pencil shape pattern with a narrow half power beamwidth, which makes the proposed system suitable for high power microwave applications. The proposed planar SWA is composed of only t...
Article
Full-text available
This article presents a new method for the calculation of the dielectric constant of low-loss materials having a thickness of more than half a wavelength in the sample. The proposed method relies solely on the frequency values at which the reflection coefficient $S_{11}$ resonance occurs and does not require precalibration or shifting of the refe...
Article
The current landmine clearance methods mostly rely on the manual use of metal detectors (MDs) and on the deminer’s experience in differentiating between the sounds emitted due to the presence of a landmine or of harmless clutter. This process suffers from high false-alarm rates, which renders the demining effort slow and costly. In this paper, we r...
Conference Paper
In this work, the permittivity of sand and soil is studied as it varies versus their humidity content. It is well known that the permittivity of sand and soil increases with elevated humidity, since the water's dielectric constant is much higher. The aim of this work is to quantify this permittivity variation. The transmission reflection method is...
Article
Full-text available
The literature lacks detailed information about the electrical properties of the plastic filaments used in 3D printing. This opens the way for research on characterizing the types of materials used in these filaments. In this work, a method for the extraction of the dielectric constant and loss tangent of materials is described. This method, which...
Conference Paper
Full-text available
Slotted waveguide antennas (SWAs) are widely used in high power microwave applications. In this paper, the slots displacements in broadwall SWAs, previously used to control the SWA sidelobe level ratio (SLR), are further investigated to also adjust the beamwidth of the SWA. A modified Taylor array design method is used to estimate the excitations o...
Article
In this paper, a novel approach for physical layer security is implemented using massive cylindrical antenna arrays. Part of the arrays are used for transmitting a signal reliably from source to destination using highly directive beams. At the same time, the remaining part can be used to mitigate eavesdropping by transmitting a jamming signal throu...
Article
Full-text available
Antenna arrays are commonly used to achieve high gains and beam steering, but they require complex feeding networks. For applications demanding moderate antenna gains (≃6 dB) and planar radiating structures, printed Yagi-Uda antennas can offer many advantages, but clearly, they cannot cover the whole azimuth plane. A symmetric structure made of two...
Conference Paper
In this work, a magnetic field distribution study is done inside two TEM cells with different configurations to find the optimal position for the probe used during the calibration procedure with the aim of minimizing the error resulting from inaccurate readings.
Article
Full-text available
K-means is one of the most commonly used clustering algorithms, with diverse scope for implementation in the signal processing, artificial intelligence and image processing fields, among others. Different variations and improvements of K-means exist, with kernel K-means being the most famous. K-means has been the subject of many studies aiming to i...
Conference Paper
This paper presents a 3D-printed, low-cost and lightweight transverse electromagnetic (TEM) cell that functions as good as traditional metal TEM cells. An open TEM cell is first designed and simulated. Later, a prototype is fabricated by printing the different parts using an inexpensive 3D printer. The cell's operating bandwidth spans the range fro...
Article
Full-text available
This article basically deals with the implementation of a negligible resistance varactor with a wide capacitance value into a modified version of a cedar shape antenna [1]. The electromagnetic characteristics of the antenna are manipulated both at the level of fractal geometry and electrical length using diodes. The antenna achieves tunability in a...
Conference Paper
Full-text available
Yagi-Uda antennas are famous for their broadband and endfire directional pattern properties. A folded dipole is commonly used as the Yagi-Uda driven element. Compared to a linear dipole, a folded dipole provides a higher input impedance, which is scaled by N2, where N is the number of elements in the folded dipole. This paper presents a C-band prin...
Conference Paper
An antipodal Vivaldi antenna is designed for use in the ground penetrating radar (GPR) detection of landmines. Two such antennas, one transmitting and one receiving, are connected to an ultra-wideband GPR to record the responses of exact models of certain types of landmines. Later, a periodic structure converter is used to transform the antennas' l...
Conference Paper
Full-text available
This paper presents an inventive and simple procedure for the design of a 2D slotted waveguide antenna (SWA) having a desired sidelobe level (SLL) and a pencil shape pattern. The 2D array is formed by a defined number of 1D broadwall SWAs, which are fed using an extra broadwall SWA. For specified number of identical longitudinal slots in both dimen...
Conference Paper
Full-text available
This paper presents a novel design of a varactor-based tunable microstrip band pass filter suitable for several applications such as LTE, UMTS, WiFi and others. The proposed filter is designed on a Rogers RO3203 substrate over a full ground plane. The filter is based on a PI(π)-shaped slot incorporated in a microstrip line between a pair of gaps. T...
Conference Paper
Full-text available
A simple method for the design of rectangular slotted waveguide antennas (SWAs) with specified sidelobe levels is briefly described, and is used to design an example SWA with 7 broadwall elliptical slots and sidelobes lower than −20 dB. A special corrugation geometry is then added to the SWA, where the uniform height of the corrugations controls th...
Conference Paper
In this paper, a design of a compact multi-band antenna with reconfigurability is presented. The design is based on incorporating two split-ring resonators to an F-shaped monopole antenna. Electronic switches are mounted across these resonators to serve in activating or deactivating their resonance frequency, thus leading to reconfigurability. The...
Article
Full-text available
Several available methods, known in literatures, are available for solving nth order differential equations and their complexities differ based on the accuracy of the solution. A successful method, known to researcher in the area of computational electromagnetic and called the Method of Moment (MoM) is found to have its way in this domain and can b...
Article
Full-text available
This paper presents a Vlasov antenna with curved cut shape and improved reflector position and geometry suitable for high power microwave applications. The curved shape of the proposed cut totally eliminates the sharp edges and angles present in Vlasov antennas with step and bevel cuts. Furthermore, with the proposed reflector configuration, the wa...
Article
Full-text available
Slotted waveguide antenna (SWA) arrays offer clear advantages in terms of their design, weight, volume, power handling, directivity, and efficiency. For broadwall SWAs, the slot displacements from the wall centerline determine the antenna’s sidelobe level (SLL). This paper presents a simple inventive procedure for the design of broadwall SWAs with...
Chapter
Full-text available
The proliferation of portable devices, their growing integration into human lives and the surrounding environment, and the necessity to keep them powered have led to the increasing interest in radio frequency (RF) energy harvesting and its use in wireless mobile devices charging. The appealing features of flexible and wearable electronics, such as...
Conference Paper
In this paper, a circularly polarized antenna operating at 1.575GHz, for GPS applications is designed. The antenna has a square patch, with cross slots to ensure Right Hand Circular Polarization (RHCP) over the operating frequency range. Electronic Band Gap (EBG) structures are incorporated between the patch and the ground plane to reduce the back...
Conference Paper
In this paper, the design of a polarization diversity tunable filtenna (filter-antenna) for overlay cognitive radio applications is presented. The frequency tuning technique is based on integrating a tunable bandpass filter into the feed line of a wideband printed antenna. The proposed structure is able to tune its operating frequency, as well as,...
Conference Paper
In this paper, a tunable RF front-end sensing receiver for overlay cognitive radio applications is presented. The WLAN IEEE 802.11 g commercial wireless standard key specifications are targeted in the proposed receiver. The design includes a tunable filter-antenna, low-noise amplifier, tunable bandpass filter, single-ended balanced mixer, and a var...
Article
Full-text available
http://www.hindawi.com/journals/ijap/2014/231027/
Article
Full-text available
The Method of Moment (MoM) is a very successful tool in solving complex geometry electromagnetic (EM) problems, and is considered as the first computational approach in solving these problems. This paper approaches MoM in a very simple way and aims to produce a valuable procedure to solving boundary value problems, especially nth differential equat...
Article
Full-text available
This paper presents multiband circularly polarized (CP) antennas for radio frequency identification (RFID). A coax-fed and a microstrip-line-fed antennas having optimized cross-slots in their patches are first designed for dual-band CP operation. The microstrip-line-fed design is then modified, by incorporating a U-shaped slot in its partial ground...
Article
This paper presents frequency-tunable microstrip antennas for cognitive radio applications. The approach is based on electronically adjusting the antenna's operating frequency by integrating tunable open loop resonator (OLR) based bandpass filters into wideband antenna structures. The same technique is utilized to design cognitive radio pattern and...
Article
Full-text available
A cognitive transceiver is required to opportunistically use vacant spectrum resources licensed to primary users. Thus, it relies on a complete adaptive behavior composed of: reconfigurable radio frequency (RF) parts, enhanced spectrum sensing algorithms, and sophisticated machine learning techniques. In this paper, we present a review of the recen...
Article
Full-text available
In this paper, frequency-tunable microstrip antennas, for cognitive radio applications, are proposed. The approach is based on electrically tuning the antenna's operating frequency by integrating reconfigurable band pass filters into wideband antenna structures. The design of an open loop resonator (OLR)-based bandstop filter, and its transformatio...
Article
Full-text available
In this paper, two types of reconfigurable Dielectric Resonator Antennas (DRAs) are presented. The designs are based on rotating a Dielectric Resonator (DR), placed on the patch of the antenna, using a DC stepper motor connected to the DR to reconfigure the notch frequency, in the first, and the resonance frequency in the second design. The attaine...
Conference Paper
In this work, an S-band slotted waveguide antenna (SWA) with optimized corrugations is presented. It is based on 10 identical longitudinal elliptical slots cut in one of the broadwalls of a WR-284 waveguide (a = 2.84″, b = 1.37″). The waveguide is shorted at one end and fed from the other, leading to a resonating SWA. Elliptical slots, which have n...
Article
In this chapter, the concepts of Cognitive Radio (CR) and multi-dimensional spectrum sensing are introduced. Spectrum sensing methodologies, energy efficiency consideration, resources scheduling, and self-management and learning mechanisms in cognitive radio networks are also discussed. The entailed challenges of CR RF front-end architectures are l...
Conference Paper
In this paper, a metamaterial unit cell with low effective permeability attained over a specific frequency band is used to form a planar single-layer metamaterial structure, which is utilized as a lens for broadside gain enhancement of a patch antenna. The proposed metamaterial lens consists of an 8-by-8 matrix of Split-Ring Resonators (SRRs), and...
Conference Paper
Full-text available
This paper presents a Vlasov antenna with optimized reflector position and angle suitable for high power microwave applications. With the proposed configuration, the reflector is directly attached to the waveguide, which is an advantage and makes it simpler to radiate in the direction of the axis of the waveguide. Bevel-cut and Step-cut Vlasov ante...
Conference Paper
Full-text available
This paper presents a novel design of a reconfigurable miniaturized planar spiral monopole antenna suitable for TVWS applications. The proposed antenna is designed on a FR4 epoxy substrate fed by a microstrip line over a partial ground plane. This antenna, designed for the high frequency of the UHF band (600-800 MHz), operates with 1dB transmission...
Conference Paper
Full-text available
This paper presents an improved Vlasov antenna with a novel cut shape suitable for high power microwave applications. The curved shape of the proposed cut totally eliminates the sharp edges and angles present in Vlasov antennas with Step and Bevel cuts. A Vlasov antenna, designed for operation at 3 GHz, is used to compare the three cut types. In ad...
Article
A new single layer meta-material lens design with frequency-dependent focal points is investigated. In the proposed design, the surface of the single layer dielectric material is divided into zones in the same plane with perforations of different specifications. The focal point for each frequency is achieved through varying the permittivity coeffic...