Rifa Atul Izza Asyari

arXiv2022

High Gain Array Antenna With FSS for Vital Sign Monitoring Through the Wall

In this research, a 2.4 GHz planar array antenna 2X2 combined with frequency selective surface (FSS) is proposed to obtain a high gain and high efficiency for improving the performance of vital sign monitoring through the wall using Self-injection-locked radar systems. The FSS is designed on a double-layer with unit cells of 9X7 for each layer. Modified Jerusalem cross-shaped of FSS is proposed to enhance the gain. The antenna array and additional FSS can obtain a gain of 15.2 dB and 82% of efficiency. the vital sign monitoring of the subject behind the wall has been successfully carried out.

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arXiv2022

Optical Network Design for 4G LTE

The number of mobile users is increasing rapidly, 3GPP initiated a new technology 4G Long Term Evolution (LTE). LTE is an enabling technology as a solution to the problem of network capacity and quality in areas that have a high demand like Sleman. The quality of LTE networks are supported by backbone and distribution network. This paper describes the designing of fiber optic network as the LTE backbone network in Sleman. The backbone network requires G-652 optical cable along 85 km with a ring topology and WDM-STM64 technology. The distribution network uses GPON technology and the type of G984 optical cable along 61.35 km. The minimum of power received at the end-point in the optisystem simulation is -25 dBm and -26 dBm through the calculation. This value is acceptable, since it is above the minimum of power received (Receiver Sensitivity) -28 dBm which refers to the standard parameters of G.984.2. The average value of rise time is 69 ps, this value is still below the maximum allowable value of rise time 70 ps. Average BER of backbone link is 5x10-4.

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