The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
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 (MATs) have gained much attention in the last few years...
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 be 1D or 2D, passive or active, and static or dynamically...
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 sensor faults becomes an important issue to optimize...
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 constraints to the development of small communication terminals,...
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 rectangular microstrip patch antenna integrated with hybrid...
The reconfigurability may be required in operating frequency, radiation pattern and/or polarization of the antenna. Application areas that drive the development of reconfigurable antennas include multifunction wireless devices, WLAN, multiple-input multiple-output (MIMO), ultra-wideband (UWB) systems, anti-jamming and secure communication. Recent technologies enable electronic and RF circuits in radar...
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 choice for the implementation of filters with low loss,...
Proportional navigation (PN) is the guidance law used by most missiles in operational use today. This method of guidance generates missile acceleration commands in proportion to the line-of-sight (LOS) rate. Flexible interceptor defines as a fast maneuverable fighter plane. So, optimal homing missile guidance must be required to improve realism in missile behavior. In the case of sensor(s) transient...
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 multiple sensor faults become an important process...
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 the interference both in the uplink and the downlink...
Metamaterials is a rapidly evolving field of research that covers a vast range of artificial structures and electro-magnetic 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 constituent materials. The composite right / left-handed...
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 sensor faults becomes an important issue to optimize...
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 have greater capacity to convey large amounts of information...
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 composite right / left-handed transmission lines (CRLH-TLs)...
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 connectivity between one or more autonomous devices...
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 channel capacity levels. Furthermore, multiple antenna systems...
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 frequency of different embedded CRLH-TL array has...
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 often referred to known as a limiter, can protect the...
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 has exploded over the last years because of their potential...
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 wireless communication, Internet and optical data storage...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.