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Patel S.K.,Chandubhai S Patel Institute Of Technology | Kosta Y.P.,Marwadi Education Foundations Group Of Institutions
Waves in Random and Complex Media | Year: 2012

Magnetic properties can be imparted to a naturally nonmagnetic material by metallic inclusions. A multiband meandered square microstrip patch antenna loaded with such a metamaterial is reported. Metamaterials exhibit qualitatively new electromagnetic response functions that cannot be found in nature. The inclusion of these structures allows simultaneous operation over several frequencies. The antenna was designed to function in multiple bands in the frequency range 0.6-2.2GHz. The antenna has eight working frequency bands and its centre frequencies are 670MHz, 1185 MHz, 1293MHz, 1747MHz, 1909MHz, 1999MHz, 2063MHz and 2134MHz. The metamaterial also enhances the gain of the antenna, which is applicable for several wireless applications. Design results were obtained by a high frequency structure simulator which is used for simulating microwave passive components. © 2012 Taylor and Francis Group, LLC.

Raval F.,Chandubhai S Patel Institute Of Technology | Kosta Y.P.,Marwadi Education Foundations Group Of Institutions | Joshi H.,Chandubhai S Patel Institute Of Technology
AEU - International Journal of Electronics and Communications | Year: 2015

In this paper, the authors have presented a reduced size metamaterial loaded circular microstrip patch antenna. In the present work, complementary split ring resonator is loaded in the ground plane of circular microstrip patch antenna is. The unloaded circular microstrip patch antenna resonates at 6.11 GHz, whereas after loading it with complementary split ring resonator, the same antenna resonates near 6.11 GHz with reduced size. The effective footprint of the antenna is reduced by nearly 64% compared to the conventional patch antenna. The gain of the metamaterial loaded antenna structure is 5.04 dB. © 2015 Elsevier GmbH. All rights reserved.

Shah D.,Chandubhai S Patel Institute Of Technology | Hadia S.K.,Chandubhai S Patel Institute Of Technology
2015 International Conference on Communication and Signal Processing, ICCSP 2015 | Year: 2015

In communication, compression is utilized to decrease the size of the information with a specific end goal to reduce memory space for information stockpiling, lessening data transfer capacity necessities for ongoing transmission, diminishing the transmission time by decreasing bit rate of information. Consultative Committee for Space Data System (CCSDS) image compression standard is one of compelling compression strategy similar to JPEG20000/SPIHT. This standard encourages both lossy and lossless compression of gray scale images. It is in based on Discrete Wavelet Transform (DWT) and a Bit Plane Encoder to give progressive compression/decompression. It is carried out in different stages, decompression is carried out in its invert way and every decompression stage's yield gives the closest of original image and last stage gives the original image with no misfortune. An outcome is produced for encoding performed to the low frequency substance of the DWT translated image because the human visual system is more delicate to the low frequency segment and encoding is carried out just on low frequency contains that gives lossy compression but accomplished high compression ratio. © 2015 IEEE.

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