Yasser M. Madany

Alexandria University | AU · Division of Communication and Electronics

Radio or wireless communication means to transfer information over long distance without using any wires. Millions of people exchange information every day using pager, cellular, telephones, laptops, various types of personal digital assistance (PDAs) and other wireless communication products. The worldwide interoperability for microwave access (Wi...

Microstrip antennas have been developed for various applications such as broadband High speed wireless communication systems and automotive radar systems. They are more advantageous than other millimeter-wave antennas at the viewpoints of low profile and low cost. As the target radar cross section (RCS) continuously decreases, the need for high gai...

Electromagnetic metamaterials are artificially structured materials composed of periodic arrays of -typically resonant-sub-wavelength metallic structures whose electric or magnetic response provides the freedom to design dielectric or magnetic properties that might not exist in conventional materials. By changing the geometrical parameters of the c...

Unmanned aerial vehicles (UAVs) have become one of the most popular and promising means for both military and civilian posts and academic research areas. Localization of the UAVs and persistent tracking of a UAV have vital importance to provide a UAV with navigation information and help to cope with getting lost permanently. Indeed, inertial naviga...

In this paper, low-profile frequency reconfigurable patch antennas for cognitive radio applications are proposed on the ultra-wideband (UWB) frequency range. The methodology of the proposed antennas is described in this paper, and is achievable by controlling the electrical length of the antenna. additionally, miniaturized patch antennas are achiev...

The rapid development of intelligent navigation systems has speed development for its uses in military and civilian applications. On-board integrated navigation and multiple sensors are essential for real-time data update. Using multiple sensors may sever from the disconnection of the readings due to sensor(s) transient faults. So, the need for sen...

Recent technologies enable electronic and RF circuits in communication devices and radar to be miniaturized and become physically smaller in size. Antenna design has been one of the key limiting constraints to the development of small communication terminals and also in meeting next generation and radar requirements. Multiple antenna technologies (...

Metamaterials represent a new paradigm in electromagnetic science and technology. They have already leaded to many unprecedented microwave applications, which may be classified in three categories: guided-wave, radiated-wave and refracted-wave applications. Radiated-wave applications cover several types of novel antennas and reflectors, which may b...

Modern satellite, wireless communications, and radar systems often demand the wideband performance for multi-channel and multi-function operation. Recent technologies enable electronic and RF circuits in radar and communication devices to be miniaturized and become physically smaller in size. Antenna design has been one of the key limiting constrai...

Multiple-input multiple-output (MIMO) direct conversion transceiver (MIMO-DCT) is one of the major advances in recent generation wireless standards that led to the large increase in the data rates and throughput via the use of multiple antennas on the receiver and transmitter sides. In this paper, the design of a compact miniature and low cost rect...

The recent technology of intelligent systems is using multiple sensors to assess real-time information of the internal system states and the environmental operating conditions. In the case of sensor(s) transient faults, the dis-connection of the readings causes inappropriate actions. So the need for sensor fault detecting and estimating multiple se...

A microwave filter is typically a device that is used for frequency selectivity over the microwave frequency range by permitting good RF transmission within the passband of the filter, while rejecting RF in the stopband of the filter. These filters are one of the fundamental components of any microwave system design. Waveguide is an excellent choic...

Modern radio communication systems have to provide higher and higher data rates. Multiple antenna technologies (MATs) have gained much attention in the last few years because of the huge gain. MATs can enhance the communication reliability and the channel capacity levels. Furthermore, multiple antenna systems can have a big contribution to reduce t...

The recent technology of intelligent systems have been used multiple sensors to assess real-time information of the internal system states and the environmental operating conditions. In case of sensor (s) transient fault, the disconnection of the readings caused to apply inappropriate actions. So, the needs for sensor fault detecting and estimating...

Metamaterials is a rapidly evolving field of research that covers a vast range of artificial structures and electromagnetic properties. Resulting from this, there is no universally accepted definition of what is meant by a meta-material. It is generally agreed that metamaterials are artificial media with unusual properties not found in their consti...

The recent technology of intelligent systems is using multiple sensors to assess real-time information of the internal system states and the environmental operating conditions. In the case of sensor (s) transient faults, the disconnection of the readings causes inappropriate actions. So the need for sensor fault detecting and estimating multiple se...

The digital modulation provides more information capacity, compatibility with digital data services, higher data security, better quality communications, and quicker system availability. The RF spectrum must be shared, yet every day there are more users for that spectrum as demand for communications services increases. Digital modulation schemes ha...

Control and manipulation of electromagnetic waves is at the heart of many industries from wireless communication, internet and optical data storage to imaging and microwave applications. Progress in metamaterial technologies places challenging demands on material properties and therefore structured electromagnetic materials. The development of comp...

Machine-to-machine (M2M) technology that allows machine devices to communicate directly with each other has emerged as a cutting-edge technology for next-generation communication. As its applications become more and more popular, the number of users grows quickly and the quality of service needs to be improved. M2M communication enables ubiquitous...

Modern radio communication systems have to provide higher and higher data rates. As conventional methods like using more bandwidth or higher order modulation types are limited. Multiple antenna technologies (MATs) have gained much attention in the last few years because of the huge gain. MATs can enhance the communication reliability and the channe...

Recently, the development of composite right / left handed transmission lines (CRLHTLs) has received considerable attention due to the unique propagation characteristics. Because of this increase in applications, CRLHTLs are being implemented in RF systems with other printed circuitry, such as microstrip antennas. In this paper, harmonics resonance...

Radio and radar receivers must be capable of processing very small signals, necessitating the use of very sensitive circuit blocks that can contain fragile semiconductors. Many of these systems must also be capable of surviving very large incident signals, without damage to the sensitive built-in components. The receiver protection limiter, most of...

Modern radio communication systems have to provide higher and higher data rates. As conventional methods like using more bandwidth or higher order modulation types are limited. Multiple antenna systems or Multiple Input, Multiple Output (MIMO) gives a significant enhancement to data rate and channel capacity. The interest in MIMO antenna systems ha...

Metamaterials represent a new paradigm in electromagnetic science and technology. They have already leaded to many unprecedented microwave applications, which may be classified in three categories: guided-wave, radiated-wave and refracted-wave applications. Control and manipulation of electromagnetic waves is at the heart of many industries from wi...

Control and manipulation of electromagnetic waves is at the heart of many industries from wireless communication, Internet and optical data storage to imaging and displays. Progress in these technologies places challenging demands on material properties and therefore structured electromagnetic materials. Metamaterials are a special class of structu...

The wireless market is developing very fast today with a steadily increasing number of users all around the world. An increasing number of users and the constant need for higher and higher data rates have led to an increasing number of emerging wireless communication standards. As a result there is a huge demand for flexible and low-cost radio arch...

Unmanned air systems (UASs) are playing increasingly prominent roles in defense programs and defense strategy around the world. Technology advancements have enabled the development of large UASs and the creation of smaller, increasingly capable UASs. As recent conflicts have demonstrated, there are numerous military applications for UASs including...

Ultra-wideband (UWB) radio is a technology that has a wide range of applications including range measurement, materials penetration, and low probability of interception and interference communication systems. Recent developments make it possible to build a transmitter and receiver on a single chip at low cost. The intelligent transportation system...

Metamaterials represent a new paradigm in electromagnetic science and technology. They have already leaded to many unprecedented microwave applications, which may be classified in three categories: guided-wave, radiated-wave and refracted-wave applications. Radiated-wave applications cover several types of novel antennas and reflectors, which may b...

The FCC’s allocation of 300 MHz of bandwidth in the 5-GHz frequency band (5.15–5.35/5.725–5.825 GHz) for the unlicensed national information infrastructure (UNII), high data rate (up to 50 Mb/s) wireless local area networks (WLAN) have become increasingly popular and important for mobile computing devices such as notebook computers. The European co...

The radiation property of the slotted waveguide antenna as a class of antenna commonly used in microwave radar applications, does not depend on the cross section of the waveguide, but on the inclusion. The primary goal of this paper was to miniaturize a C-Band slotted waveguide antenna using metamaterial array structure rather than classical dielec...

In the recent years, personal and mobile communications networks have developed rapidly, causing an increasing need for affordable, compact and easily integrated antennas. The increasing demand for wireless internet access, wireless cable television, among others, will force such systems to provide high throughput, and simultaneous access to differ...

Since the release by the Federal Communications Commission (FCC) for ultra-wideband (UWB) wireless communications (from 3.1GHz to 10.6GHz), UWB is rapidly advancing as a high data rate wireless communication technology. There are more challenges in designing a UWB antenna than a narrow band one. To choose an optimum antenna topology for UWB design,...

The developments in the design of band reject filters are essential to meet the ever increasing demands on suppression of unwanted signals and miniaturization of microwave communications systems. In this paper, a compact wideband SPDT-T/R switch with PIN diode has been introduced, analyzed and designed. The proposed SPDT switch provides two state o...

Ultra-wideband (UWB) radio is a technology that has a wide range of applications including range measurement, materials penetration, and low probability of interception and interference communication systems. Recent developments make it possible to build a transmitter and receiver on a single chip at low cost. The intelligent transportation system...

This paper presents the design of miniaturized conformal paraboloid smart antenna system using 1×8 switched Butler Matrix and the realization of its planar smart antenna system. The demands of wireless communication were increases, so the higher capacity, wider coverage and low attenuation are main characteristic to provide the better and quality s...

Ultra-wideband (UWB) radio is a technology that has a wide range of applications including range measurement, materials penetration, and low probability of interception and interference communication systems. UWB signals are unusual, because they have a bandwidth greater than 25 percent of center frequency compared to less than unity percent for co...

This paper presents the design of optimum miniature-ized conformal smart antenna system using 1x8 switched Butler Matrix and the realization of its planar smart antenna system. The demands of wireless communication were increases, so the higher capacity, wider coverage and low attenuation are main characteristic to provide the better and quality se...

In this paper, the design of a compact miniature and low cost rectangular microstrip patch antenna integrated with 90° hybrid coupler, Wilkinson power divider and circulator for direct conversion, or zero IF transceiver. The frequency chosen is at 2.4 GHz, which is of particular interest wireless application. The finite element method (FEM) simulat...

In this paper, guided waves with enhancement TE10 transmission using multi-mode metamaterial array and multimode extractor-converter structures have been introduced and analyzed using the full 3D electromagnetic field inside a structure based on the finite element method. The proposed structure presents TE10 enhancement transmission coefficient rat...

As the target radar cross section (RCS) continuously decreases, the need for high resolution high-gain radar increases. One approach to high resolution is to use distributed subarray antennas (DSAs), because of limited surface available on many radar platforms. In this paper, the investigation and design of distributed subarray smart antenna system...

In this paper, guided waves with enhancement TE10 transmission using multi-mode metamaterial array structures have been introduced and analyzed using the full 3D electromagnetic field inside a structure based on the finite element method. The proposed structure presents TE10 enhancement transmission coefficient ratio up to 18.64 and 14.3 for differ...

This paper presents the design and realization of optimum miniaturized smart antenna system using 1x8 switched Butler Matrix. The demands of wireless communication were increases in the recent years. So the higher capacity, wider coverage and low attenuation are main characteristic to provide the better and quality services. Smart antenna systems p...

Slotted antenna arrays used with waveguides are a popular antenna in navigation, radar and other high-frequency systems. They have low-loss, high efficiency and radiate linear polarization with low cross-polarization. In this paper, slotted waveguide antenna with enhancement TE10 transmission using multi-mode metamaterial array and multi-mode extra...

Due to the recent rapid development in wireless communication, all mobile communications system or network are now operating with more than one frequency band; an example is the wireless local area network (WLAN) that is designed for multi-bands operation in the frequency range 2.4 - 5.85 GHz. A dual-band enhancement of planar inverted F-Lantenna (...

The waveguide antenna arrays provide a number of advantages are related with the antenna planar form, strength of the construction, high power operation capability and high efficiency. In this paper, the optimum transition waveguide channel of mode extractor-converter structure for X-band radar antenna applications has been introduced and analyzed...

The waveguide antenna arrays provide a number of advantages in many radar, remote sensing and satellite applications. The advantages are related with the antenna planar form, strength of the construction, high power operation capability, high efficiency, small thickness and weight. In this paper, guided waves with enhancement TE10 transmission usin...

A novel concept for determining the full state of a projectile near the muzzle of the gun has been investigated. The methodology relies on the gun system inducing a known spatially varying magnetic field. Using readings from a cluster of magnetometers embedded within the projectile, the 12-DOF is determined by solving a nonlinear set of equations u...

In the recent years, personal and mobile communications networks have developed rapidly, causing an increasing need for affordable, compact and easily integrated antennas. The increasing demand for wireless internet access, wireless cable television, among others, will force such systems to provide high throughput, and simultaneous access to differ...

The rapid evolution of wireless communication technologies in recent years has raised the need for new design concepts in antenna engineering. Also, wearable computing is a new, fast growing field in application-oriented research. Steadily progressing miniaturization in microelectronics along with other new technologies enables wearable computing t...

The characteristics of multimode X-band wraparound mode converter and extractor for RF pulse compression systems have been analyzed using a full 3D electromagnetic field inside a structure based on the finite element method (FEM). The converter performance is sensitive to the number of guide feeding and the feed of the WR90 rectangular waveguide wh...

The characteristics of multimode delay line on RF pulse compression has been analyzed using a full 3D electromagnetic field inside a structure based on the finite element method (FEM). The multimode delay line performance is sensitive to the delay line length whose value is equal to a fractional wavelength and the output port. It allows transmissio...

The characteristics of new ultra-wideband (UWB) driven triple slotted trapezoidal antenna with L-shaped ground plane has been analyzed using a full 3D electromagnetic field inside a structure based on the finite element method (FEM). The UWB technologies have been developed to exploit a substantially new spectrum resource and to realize ultra high-...

In this paper, inverted trapezoidal antenna enhancements has been introduced, which has been analyzed using a full 3D electromagnetic field inside a structure based on the finite element method (FEM). The radiation characteristics for the proposed antenna such as return loss, VSWR, input impedance, near field, E-plane and 3D-polar radiation pattern...

In this paper, UWB regular polyhedron microstrip antennas with frustum of a right circular cone substrate structure with εr=2.2 and different n-sides are analyzed using Ansoft HFSS simulator. The sample of scattering parameters, input impedance, near field, radiation pattern and 3D-polar radiation pattern are given for various n-sides.

The characteristics of new ultra wideband (UWB) like fractal microstrip patch antenna element and 24×10 elements wideband conformal microstrip array antenna using non-uniform photonic bandgap (PBG) substrate structure whose gap positions enhance some modes and weaken others have been analyzed using a full 3D electromagnetic field inside a structure...

The characteristics of new ultra wideband (UWB) like fractal microstrip patch antenna using a non-uniform photonic bandgap (PBG) substrate structure have been analyzed using a full 3D electromagnetic field inside the structure based on the finite element method. UWB technologies have been developed to exploit a substantially new spectrum resource a...

The characteristics of new high gain multiband C-shaped and coupled C-shaped microstrip patch antennas have been analyzed using a full wave analysis simulator. The antenna performances are sensitive to the radius and the feed location, which have been used to control the antenna gains up to 35.3 dB in some cases and bandwidths up to 19.4% in other...

The characteristics of new high gain multiband rounded corners dashed rectangular spiral microstrip patch antenna has been analyzed using a full wave analysis simulator. The antenna performance is sensitive to the cutting angles, which have been used to control the antenna gains up to 32.8 dB in some cases and bandwidths up to 20.1% in others. The...

The characteristics of new ultra wideband (UWB) wheel microstrip patch antenna using non-uniform photonic bandgap (PBG) substrate structure has been analyzed using a full 3D electromagnetic field inside a structure based on the finite element method. The UWB technologies have been developed to exploit a substantially new spectrum resource and to re...

The characteristics of new high gain multifrequency rooftile and mazy rooftile microstrip patch antennas fed by a single small strip have been analyzed using a full wave analysis simulator. The antennas performance is sensitive to the dielectric thickness and patch separation from the ground, which have been used to control the antennas gains up to...

The characteristics of a new wideband inverted trapezoidal microstrip patch antenna fed by uneven I-beam are analyzed using a full wave analysis simulator. The wideband antenna performance greatly depends on the design parameters which have been used to control the antenna resonance frequencies and bandwidths. The proposed antenna is constructed on...

The characteristics of a new multiband tapered I-beam microstrip patch antenna fed by a single strip line have been analyzed using a full wave analysis simulator. The multiband antenna performance greatly depends on the design parameters, which have been used to control the antenna resonance frequencies and bandwidths. The proposed antenna is const...

A three-dimensional finite-difference time-domain (3D-FDTD) method is used to construct a new multiband operation of a microstrip patch antenna fed by single small strip. The antenna is constructed once on Duroid structure ε_r=2.2 and then quartz substrate ε=3.8. The FDTD method is used to calculate the radiation characteristics...

A three- dimensional finite- difference time- domain (3D-FDTD) method is used to construct a new multiband operation of a microstrip patch antennas fed by a single small strip. The antennas are constructed on Duroid substrate εr=2.2. The FDTD method is used to calculate the radiation characteristics and input impedances of the antennas. The triple...

A three-dimensional finite-difference time-domain (3D-FDTD) method is used to construct a new multiband operation of a microstrip patch antenna fed by single small strip. The antenna is constructed on Duroid substrate with relative permittivity 2.2. The FDTD method is used to calculate the radiation characteristics and input impedance of the antenn...