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In this paper, a wearable microstrip patch antenna using inter-digital capacitor (IDC) and rectangular stub for 802.11 b WLAN band applications is presented. The antenna is fabricated on an inexpensive polyester cloth substrate. The antenna resonates at 2.45 GHz with the bandwidth and gain of 41 MHz and 5 dBi respectively. The electrical dimension of proposed wearable antenna is 0.213 λ × 0.246 λ...
This paper presents two configurations of rectangular microstrip patch antenna loaded with two element SRR array without and with the array of metallic via holes respectively. In both configurations, the antenna resonates at the same frequency bands. But when split ring resonator (SRR) array with metallic via hole loading is used the bandwidth is enhanced by the factors of 0.79 and 8.20 at respective...
In this paper the authors have presented a planar metamaterial antenna using offset fed diamond shaped split rings (DSSR). The structure behaves as normal patch antenna when the split rings are excited at normal cuts on Y-axis whereas the same structure exhibits metamaterial characteristics when fed at offset cut at an angle ??=45??. In offset cut the excess inductance and capacitance due to microstrip...
Miniaturized microstrip antennas are of great interest in the recent time especially in wireless communication systems and biomedical applications. To enhance efficiency, avoid co-channel, adjacent channel interference and associated complications accurate determination of resonant frequency is an essential requirement. A method to calculate accurately the resonant frequency is of great importance...
In this paper, the authors propose a new evolutionary optimization technique i.e. modified biogeography-based optimization (MBBO). This technique is an improved version of BBO with each solution is directly encoded by floating point. BBO is a new bio-inspired and population based optimization algorithm for global optimization. The exploitation ability of BBO method is good but it lacks in exploration...
In the aging human brain, the concentrations of iron and its major storage protein, ferritin, rise but the distribution of metal and protein remains non-uniform. More ferritin could be isolated from the brains of humans who died of Alzheimer's disease (AD) than from age-and sex-matched controls. Also, brain ferritin of rats chronically exposed to aluminum chloride in their drinking water contained...
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