Design and Analysis of Fractal Based Monopole Antenna Backed with Modified Jerusalem Cross Frequency Selective Surface f
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Design and Analysis of Fractal Based Monopole Antenna Backed with Modified Jerusalem Cross Frequency Selective Surface for Wireless Personal Area Communications Bashyam Sugumaran 1
&
Ramachandran Balasubramanian 1
# Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract This paper presents a low profile Single-layer Modified Jerusalem Cross Frequency Selective Surface (SMJC FSS) which functions as a band-stop filter to shield the 2.45 GHz Industrial, Scientific and Medical (ISM) band with a unit cell size of 0.249λg × 0.249λg × 0.027λg. Compared to JC FSS, 50% size reduction is achieved by the effect of capacitive and inductive loading. The proposed FSS exhibits a fractional bandwidth of 14.69% and fractional bandwidth dimension ratio (FBDR) of 8775.4, which is one of the highest among the single layer FSS. The Koch curve inspired fractal monopole antenna is backed by 5 × 5 FSS array, which contributes enhanced gain and fractional bandwidth of 6.28 dB and 23.75% respectively and has a net dimension of 75 × 75mm ×31.2 mm. The specific absorption rate (SAR) is analyzed on human arm model where proposed antenna attains 0.183 W/Kg, which makes it appropriate for the application of body area communication. The measured results agree well with the simulated results and hence it is validated for wireless personal area communications in the ISM band at 2.45 GHz. Keywords Frequency selective surface . ISM band . Wireless Personal area communication . Fractal antenna . Specific Absorption Rate
1 Introduction Frequency selective surfaces are made up of periodic surfaces which are used to remove the undesired electromagnetic waves. The FSS used as band-pass radomes reduces the radar cross-section area of the antennas out of their operating band. FSS also used as reflectors and circuit analog absorbers. It is utilized in body area communication as it has band rejection characteristics where the radiation of particular frequency does not affect the human body. The body area communication gains more interest in communication systems that permits wireless connectivity among low-power devices [1] for monitoring vital signs of a human for an extensive range of applications such as sports, health, army, and lifestyle * Bashyam Sugumaran [email protected] * Ramachandran Balasubramanian [email protected] 1
Electronics and Communication Engineering, SRM Institute of Science and Technology, Kattankulathur, Kanchipuram, Tamilnadu 603 203, India
computing. Continuous monitoring of physiological signals like electrocardiogram (ECG) and electroencephalogram (EEG) tends to increase in absorption of radiation by the human body which needs to be reduced. So Frequency selective surface with band rejection characteristics is a noble candidate for the standards like Bluetooth and Wireless Local Area Network (WLAN) which accompanies continuous wireless transmission of signals. Numerous methods are proposed to produce compactness in FSS structure. A quarter wavelength stepped impedance resonator [2] and convolut
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