Sivaranjan Goswami

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Microstrip antennas have received a wide attention all over the world in the past few decades with the fast development of portable electronic gadgets like mobile phones, laptops etc. The sizes of these devices are shrinking day by day and functionalities are becoming wider. However, the size of the microstrip antenna often puts a limit to the extent to(More)
Various approaches have evolved for the improvement of the performance of microstrip antennas like modifying geometry of the patch, using multilayered substrate, cutting out slots of different shapes from the patch or the ground plane etc. Of late, metamaterial inspired designs are receiving greater attention. The present work focuses on a combination of(More)
Speech signals often get degraded by various types of noise at different stages of speech recording, processing and communication systems. One major source of noise is the background noise, which highly degrades the speech signal quality and decreases the listening comfort. Speech enhancement is a section of digital speech processing in which the(More)
The complementary split ring resonator (CSRR) is a widely used planar metamaterial structure in the design of microstrip antennas and other microstrip elements. In this work, a study has been made on converting a single band microstrip antenna into a dual band microstrip antenna by etching a CSRR structure from the ground plane below the patch. Initially, a(More)
In any amplifier design, it is always necessary to give utmost attention to its frequency response analysis. While applying frequency response for some application it is also important to extend the bandwidth of an amplifier. Increasing the bandwidth means increasing the upper 3 dB frequency and decreasing the lower 3 dB limit. Although there are different(More)
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