Ultra-Wide Band Radar and its Applications
Voice over Internet Protocol Codec Performance in Interactive Streaming Environment
Design and Simulation of Phased Array Antenna 5G Applications
A Study on Energy Consumption and Impact on Network Lifetime using ANODR and DYMO Routing Protocol in MANETs using QualNet Simulator
A Review on Evolution, Expectations and Key Enabling Techniques of 5G
Cognitive Radio Simulator for Mobile Networks: Design and Implementation
Reduced End-To-End Delay for Manets using SHSP-EA3ACK Algorithm
Light Fidelity Design for Audio Transmission Using Light Dependent Resistor
Dynamic Digital Parking System
Performance Analysis of Multi User Transmit Antenna Selection Systems over TWDP Fading Channels
Comparison of Wavelet Transforms For Denoising And Analysis Of PCG Signal
Video Shot Boundary Detection – Comparison of Color Histogram and Gist Method
Curvelets with New Quantizer for Image Compression
Comparison of Hybrid Diversity Systems Over Rayleigh Fading Channel
Design of Close Loop Dual-Band BPF Using CascadedOpen Loop Triangular Ring Resonator Loaded With Open Stubs
In this paper, an ACS-fed Multiband antenna is presented. The resulting antenna resonates at 2.4 GHz, 3.5 GHz, 5.5 GHz 2 covering the WLAN and WiMAX operation bands. The overall dimensions of antenna is 19×21 mm printed on FR4 substrate material of 4.4 dielectric constant and 1.6 mm thickness. The proposed antenna follows the uncomplicated design, compactness, and easy fabrication. The details of antenna and results are discussed in this work. The antenna is designed using HFSS v13.
A new compact and planar design for dual band Band Pass Filter (BPF) is proposed. The proposed BPF is a cascaded design of open loop triangular resonator such that it forms a closed loop. Stubs are added to the resonator to improve sparameter performance of the design. Coupled resonator theory is introduced for cascade open loop triangular ring resonator with coupled stub at its open loop area to improve the rejection performance of the filter. Experimental results validate the simulated values extracted by Agilent ADS.
In this paper, a small-size inverted U-shaped structure is presented for designing a triple-band Circularly Polarized (CP) antenna which has a single metallic layer. A micro-strip Coplanar Waveguide (CPW) feed is given. The proposed antenna has a rectangular ground plane and a radiating patch that has an inverted U-shaped, and inverted L-shaped structure that creates three bands in X-band operating at 8.0 / 9.2 / 9.7 GHz frequency bands and has less than -10 dB returnloss bandwidths. The antenna also provides CP modes at 7.1 / 8.5 / 9.9 GHz. The 3 dB axial-ratio bandwidths are 486 MHz centered at 7.1 GHz, 178 MHz centered at 8.5 GHz, and 190 MHz centered at 9.9 GHz. The proposed antenna operates at frequencies 8.0 / 9.2 / 9.7 GHz with VSWR<2.
This paper represents the compact Ultra Wide Band antenna with notch characteristics. The proposed antenna consists of stubs, slots, and strips to create the notch characteristics. To reduce the size of antenna and to get the better rejection characteristics, it uses notches at the ground structure and slot techniques. This antenna is used to eliminate the potential interference caused by narrow band services along with reduction in size of antenna. This antenna uses T-shaped stub, inverted U-shaped strips near the feedline, and T-shaped slot at the edge of patch. VSWR of antenna without notch band is nearly equal to 2. This antenna gives the rejection for WiMAX band (3.3-3.7 GHz), WLAN band (5.725-5.825 GHz), and Xband satellite communication (7.250-7.745 GHz).
This paper presents a dual-band bandstop filter by using two hook shaped stepped impedance resonator. The filter structure consists of main transmission line and two three-section stepped impedance resonators are connected to this line. Transmission line contains two open stubs to give improved passband return loss and rejection bandwidth. The resonant frequency and bandwidth of the filter can be flexibly controlled by changing the length and position of high-Z and low-Z segments. The design modeling and methodology are also delivered for the efficient design. Two center frequencies at 2.2 GHz and 5.2 GHz is present with rejection level upto 54 dB.The FR4 epoxy material has been used for the design having dielectric permittivity of 4.4 and a thickness of 0.8 mm, which is easily available in market with nominal cost.
Metamaterials are artificial structures and their electromagnetic properties are not present in nature. Employing metamaterials in microstrip antenna substrate will result in the improvement of the antenna parameters like bandwidth, gain, efficiency, etc. A novel design of metamaterial is considered in order to miniaturize a circular microstrip patch antenna. Metamaterial is composed of two nested split hexagons and it is located on a 10 x 10 mm Rogers RT/duroid 5880 substrate with 0.7874 mm thickness and dielectric constant value of 2.2. Here 4 x 4 array of such nested split hexagons is placed on the patch antenna substrate. By using the metamaterial in the antenna structure, the dimension of this proposed antenna is reduced to both half and quadrature compared to a microstrip patch antenna. Here the circular patch antennas loaded by an homogeneous substrate partially filled with negative metamaterials. Metamaterial is preferred because it supports a resounding radiating mode, even if the total size of the radiator is significantly smaller than the wavelength of operation. Here HFSS Software is used for simulation.
Wireless Sensor Networks are constrained by limited energy sources, limited processing capabilities, densely deployed nodes, unreliable and asymmetric wireless links, and limited bandwidth. Under all these constraints, performance of Wireless Sensor Networks essentially depends upon proper selection of routing protocols among variety of existing protocols. In this paper, performance of Dynamic Source Routing protocol (DSR), Ad hoc On Demand Distance Vector Routing protocol (AODV), Zone Routing Protocol (ZRP), and Optimized Link State Routing Protocol (OLSR) have been evaluated for a wireless ad hoc sensor network on the basis of performance metrics, such as energy consumption of sensor nodes, total number of packet collisions, total number of error packets, total overhead transmissions, and throughput of Wireless Sensor Networks. The simulation results show that OLSR protocol being pro-active in nature least performs, while on the other hand, DSR protocol performances quite well in terms of energy consumption of sensor nodes, total number of packet collisions, total number of error packets, and total overhead transmissions. But in terms of network throughput, ZRP protocol performs very well followed by OLSR, DSR, and AODV. Finally, after taking into consideration of all major constraints of Wireless Sensor Networks, it is recommended that DSR protocol is a highly energy efficient, spectrally efficient, and reliable protocol for ensuring error free and congestion free delivery of sensed data packets.