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Ultra Wide-Band (UWB) Antennas offer large frequency bandwidth which is beneficial for various wireless communication standards. In UWB antenna systems, the transformation from input impedance to impedance of the free space is very crucial. Hence, this paper presents a distinctive impedance coupling technique known as Coplanar Waveguide (CPW) to feed the antenna. This helps in achieving low dispersion,...
The Meta-Material (MM) encompasses various unique properties viz. negative index of refraction, -∊ & -μ, backward wave propagation which embellish the performance of antenna. The paper emphasizes on the incorporating MM lens with dual band antenna for enhancing its performance parameters viz. gain, directivity, main lobe level, bandwidth, radiating power and maximum power per unit area. The coaxial...
This paper emphasizes on improving the efficacy of patch antennas with meta-material lens embedding. Antenna performance is described in terms of various performance metrics viz. efficiency, gain, directivity, main lobe and power radiation level and bandwidth. For enhancing these parameters Metamaterials (MMs) are used as an uniform flat lens along with the antenna. For analysis purpose, a patch antenna...
Coplanar waveguide (CPW) fed slot antennas are attractive due to low dispersion and ease of integration with active and passive devices. In this paper, design of slot antenna fed by CPW through capacitive coupling with finite ground plane is presented. The propose antenna exhibit perfect impedance matching, unidirectional radiation patterns, and low cross polarization. Analysis of the effects of various...
The MetaMaterial (MM) encompasses various unique properties viz. negative index of refraction, − ε & −μ, backward wave propagation which embellish the performance of antenna. The paper describes the properties of MM and designing of the MM lens. It emphasizes on the incorporating MM lens with antenna for enhancing its performance parameters viz. gain, directivity, main lobe level, bandwidth, radiating...
The paper aims at improving the radiation efficiency and enhancing the gain of a Conformal Patch Antenna (CPA). It evaluates the performance of the CPA in terms of various metrics viz. efficiency, gain, directivity, main lobe level, power radiation level and bandwidth. In order to enhance these parameters, Metamaterial (MMs) is used as a uniform flat lens in front of designed CPAs. The paper demonstrates...
One of the application in satellite communication is to capture and transmit high quality and hyper-spectral images back to the ground station. These images require very high bandwidth, more transmission time and large storage memory. Moreover, the link used for communication is susceptible to various noises. Hence, need for image compression with high compression ratio and channel encoding technique...
The demand for secure communication over the link has augmented the need for robust algorithms. In order to ensure confidentiality, authenticity and integrity of the messages transmitted, the algorithms must facilitate high efficacy. In this paper, we have implemented a method for sharing secret messages encrypting them in gray-scale images, that are processed with Discrete Wavelet Transform (DWT)...
High quality color images transmitted wirelessly should exploit minimum resources. Hence designing algorithms that are adaptive in nature has become imperative, in order to achieve the growing demands of multi-media communication. This paper implements a unique image compression technique known as ‘Cognitive Sub-Band Replacement Discrete Wavelet Transform (CSR-DWT)’. The designed algorithm performs...
The paper aims at improving the efficacy and enhancing the gain of conformal omni directional patch antenna. It evaluates the performance Conformal Patch Antenna (CPA) in terms of various metrics viz. efficiency, gain, directivity, main lobe level, power radiation level and bandwidth. In order to enhance these parameters Meta-materials (MMs) are used as an uniform flat lens in front of designed CPA...
This paper emphasizes on the emergence of Meta-materials in the field of antenna designing. For enhancing the performance of the antenna in terms of various parameters viz. gain, directivity, main lobe and side lobe levels, bandwidth; Meta-materials (MMs) are used as an uniform flat lens along with the antenna. A novel ‘U’ shape slotted patch antenna & its array of 2×2 is designed for 2.4 GHz...
Wireless Sensor Networks (WSN) is defined as a scattered topology of sensor nodes, sensing the data from the environment, processing and transmitting it to server node. This architecture is comparable to a smart grid application' Advanced Metering Infrastructure (AMI)' where a smart meter(node) serves as a data collecting device and reports the energy usage to the server. Although the IEEE802.15.4/...
This paper emphasizes on the emergence of Metamaterials in the field of antenna designing. For enhancing the performance of the antenna in terms of various parameters viz. gain, directivity, main lobe and side lobe levels, bandwidth; metamaterials are used as an uniform flat lens along with the antenna. A novel 'U' shape slotted patch antenna & its array of 2fi2 is designed for 2.4 GHz frequency...
This paper describes the designing of a highly efficient and compact wide band micro-strip patch antenna for wireless communication.The antenna is designed to transmit at 5.8 GHz frequency (ISM band) which is primarily used in wireless LAN. The main contribution of the paper is the integration of meta-materials lens with rectangular micro-strip patch antenna, in order to achieve high gain, enhanced...
Communication technologies have superseded X10systems in automation industry. Various high performance wireless technologies are implemented for remote monitoring and controlling of loads. This has resulted in revolutionizing automation systems in industrial, commercial and residential sectors. Depending upon the application spectrum, network range, power consumption constraints etc. A competent communication...
Since 2005, Smart Grid technology has revolutionized the electric power system industry. Researchers have shown a lot of interest in the opportunities offered by ICT(Information and Communication Technologies), to modernize the operation of electrical networks. This is possible by decarbonizing them as well as monitoring and controlling them with sophisticated communication standards. For this purpose,...
Due to the Human Visual System (HVS) the response to well brightened images is frequency dependent. The Discrete Cosine Transform (DCT) - based compression schemes are capable of separating the perceptually significant information in an image from the information that the eye cannot perceive. Hence in image compression, DCT is most widely used transform. In this paper, an algorithm for compressing...
Satellite images are multi-spectral in nature that operate over wavelengths of wide range frequencies known as bands. Hence, they need to be processed cautiously. This paper presents a 4-Level DWT based Sub-Band Replacement (SR-DWT) Image Compression scheme, for LANDSAT satellite images. The algorithm is designed to compress various color band images captured by the satellite payload. By performing...
Incorporation of wireless technology in Automation system has led to the development of remote monitoring and controlling of loads. It is essential to select and implement an appropriate technology according to the desired application area. This paper describes the various factors viz. network topology, network span and transmission time, which influence the performance of the system. It also illustrates...
This paper describes the designing of a highly efficient and compact micro-strip patch array antenna for wireless communication.The antenna array is designed to transmit at 2.4 GHz frequency (ISM band). The main contribution of the paper is the integration of meta-materials with a ‘U-shape’ slotted rectangular micro-strip patch antenna, in order to achieve high gain and enhance the beam directivity...
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