in this article, the linear array (with 20 elements in the horizontal orientation) of microstrip antenna is examined with horizontal polarization. the set includes three microstrip substrates. there is a power network in two lower substrates and microstrip patches in the upper substrate. excitation of patches has been done as coupled through the power network in two lower substrates. using the ...

Today’s power systems are developing from traditional multi-sensor to ubiquitous Internet of Things systems. The environmental backscatter technology makes communication equipment get rid the dependence on supply, is more energy-efficient, and effectively extends distance, which very suitable for scenarios. Tag antenna an important part backscattering, but it has problems such as low reliabilit...

We examine the downlink of wireless communication systems with receiver cooperation. The cooperative utilization among closely-located receiver nodes is referred to as cooperative receiving, which behaviors similar to multiple-antenna receiving. To realize this, a group of receiver nodes are first to form a cluster, which necessitates a node selection algorithm. The operation of such node selec...

Deduce the no-load (open-circuit) voltage Voc across the terminals of a short, center-fed linear dipole antenna of half height h when excited by a plane wave of wavelength λ h whose electric field vector Ein is parallel to the dipole antenna. The ratio Heff = |Voc/Ein| is called the effective height of the antenna. Also deduce the current Isc that would flow between the terminals if they were s...

In this paper we presents a method for handling multiple metrics and different network parameters simultaneously to analyze the loss factor of routing protocols in mobile ad hoc network(MANET) environments. We have used Taguchi’ loss function to determine the best parameters giving maximum throughput, packet delivery ratio (PDR), average delay, DROP and routing over head simultaneously for AODV...

-In this paper we presents a method for handling multiple metrics and different network parameters simultaneously to analyze the loss factor of routing protocols in mobile ad hoc network(MANET) environments. We have used Taguchi’ loss function to determine the best parameters giving maximum throughput, packet delivery ratio (PDR), average delay, DROP and routing over head simultaneously for AOM...

This paper presents the results of a new monopole antenna that exhibits 2.75-10.7 GHz performance. The proposed antenna consists of a radiating patch with notches excited by capacitive coupling feed. Also, the antenna’s truncated ground-plane incorporates a central notch. This modification significantly improves the antenna’s impedance bandwidth by 118% over an ultra-wideband frequency range. T...

A linear inversion scheme for microwave imaging of buried objects is presented in which arbitrary antennas are accounted for through their plane-wave transmitting and receiving spectra. INTRODUCTION Ground penetrating radar (GPR) is an efficient tool for microwave imaging of buried objects. Within the concept of diffraction tomography, as proposed by Devaney [1], several linear inversion scheme...