S. Sankaralingam

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A novel approach to measure the dielectric constant of fabric substrate materials used for the development of wearable antennas (also called textile antennas) is presented in this paper. The technique reported here is based on the resonance method and focused on the use of microstrip patch radiator, which contains fabric material as its substrate. The(More)
Utilization of wearable textile materials for the development of microstrip antenna segment has been rapid due to the recent miniaturization of wireless devices. A wearable antenna is meant to be a part of the clothing used for communication purposes, which includes tracking and navigation, mobile computing and public safety. This paper describes design and(More)
The possibility of utilising anchovy waste meal as a substrate for protease production by the fish gut isolate Serratia proteamaculans AP-CMST was assessed through solid-state fermentation. A time course for protease production revealed 72 h to be the optimum duration for higher production (146.24 U/g). The most suitable pH, temperature and moisture level(More)
The production of extracelluar phytase by Pseudomonas AP-MSU 2 isolated from the estuarine fish Etroplus suretensis was investigated in solid-state fermentation. Screening of agroindustrial substrates revealed that cassava waste meal produced a higher amount of phytase. The most suitable nitrogen source to enhance phytase production was found to be sodium(More)
Impedance and radiation characteristics of 2.45 GHz wearable antennas in close proximity to human body are discussed in this paper. Two circular microstrip antennas namely Flectron antenna and Zelt antenna are considered in this research work. Each of these two antennas is assumed to be placed in the vicinity of human torso with an air gap of 1 mm between(More)
Impedance and radiation characteristics of 2.45 GHz wearable antennas in close proximity to a human body are studied in this paper. Three rectangular microstrip antennas namely wash cotton antenna, polyester antenna and polyester combined cotton antenna are considered in this preliminary study. Each of these three antennas is assumed to be placed in the(More)
This paper presents design and simulation of aperture coupled microstrip antenna for circular polarization and maximum coupling. The glass epoxy (&#x03B5;<inf>r</inf> &#x003D; 4.3) is selected as the dielectric substrate for the patch as well as the quadrature hybrid coupler feed. The antenna is designed for a center frequency of 915 MHz with a bandwidth of(More)
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