The propagation of ultra wide band (UWB) signals through walls is analyzed. For this propagation studies, it is necessary to consider not only propagation at a single frequency but in the whole band. The UWB radar output signal is formed by both transmitter and antenna. The effects of antenna receiving and transmitting responses for various antenna types (such as small and aperture antennas) ar...

The purpose of this work is to propose an efficient microstrip rectenna operating on ISM band with high harmonic rejection. The receiving antenna with proximity coupled feeding line implemented in a multilayer substrate. The rectenna with integrated circular sector antenna can eliminate the need for an low pass filter (LPF) placed between the antenna and the diode as well as produce higher outp...

dN The field scattered by an antenna contains a component that is the short circuit scattered field normalized by the short circuit current, and a second component that ls the radiation field normalized by the transmitting current and multiplied by a factor (1 r). RCS is the magnitude squared of the difference between two terms, one being the square root of a complex "structural" cross section,...

This paper evaluates the applicability of the DVB-S2 standard in railway environments, where the most peculiar impairment is the periodic deep fading caused by power-supply arches distributed along the rail tracks. This effect induces a link loss every time the train antenna undergoes a power arch and cannot be counteracted with transmission power. Therefore, we propose and investigate the use ...

In recent years, wireless communication technology has been studied intensively. In particular, MIMO which employs several transmit and receive antennas is a key technology for enhancing spectral efficiency. However, conventional MIMO architectures require some transceiver circuits for the sake of transmitting and receiving separate signals, which incurs the cost of one RF front-end per antenna...

An analytical expression of the cumulative distribution function (cdf) of the normalized signal-to-noise ratio SNR of the maximum ratio combiner (MRC) in correlated Rician fading channels has been derived. The expression is expressed as an infinite power series which can be computed very fast by truncation to a finite number of terms. The analytical expression can handle any number of receiving...

Microstrip patch antennas represent one family of compact antennas that offer a conformal nature and the capability of ready integration with communication system’s printed circuitry. In this project, a 2.4 GHz circular polarization microstrip antenna is designed, constructed and measured. The selected microstrip antenna is a dual –fed circular polarized microstrip antenna. The antenna consists...

─ This paper deals with an impact of receiving antenna placed in a metal enclosure on an electromagnetic field distribution within the enclosure, and thus on its shielding effectiveness. In an experimental setup, a frequently used tool for measuring the electromagnetic field level at certain points within the enclosure is a dipole antenna connected to a measuring instrument via a coaxial cable....

On-body channels show highly polarization selectivity with respect to the orientation of the transmit and receiving antennas, while the body coupling and scattering effects in reverse affect the antenna polarization characteristics in nearfield. In this paper, three kinds of compact linearly polarized antennas, the inverted-F antenna, the meandered inverted-F antenna, and the printed dipole ant...

This paper presents a rectifying antenna (rectenna) for the harvesting of the microwave energy associated to UHF (UltraHigh Frequency) Radio Frequency IDentification (RFID) systems. The proposed device uses a capacitively loaded T-shaped monopole with a coplanar waveguide feeding line as receiving antenna and a five-stage voltage multiplier as rectifier. Experimental results demonstrating an RF...