iosr-JVSP   Volume-12 ~ Issue-2 ~ Mar. - Apr. 2022

ABSTRACT: As communications technology is ubiquitous, and energy savings are ever more crucial in communications and data storage infrastructures, it is timely to revisit the technologies used for energy storage. Thismultidisciplinary paper especially focusses on the specific requirements onto energy storage for communications and data storage,derived from traffic, climate, high availability, and resilience, irrespective from energy sources used. It also addresses techno-economic, environmental &emissions tradeoffs offered by a model, and concludes with discussing future energy storage technologies.

Keywords— Energy storage, Communications networks, Data centers, Batteries, Battery power loss, AD-DC power conversion, Life-cycle costs, Environmental life-cycle cost, Emissions life-cycle cost.

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ABSTRACT: This paper presents a dual-band monopole antenna design with compact size for 5G communication under 6 GHz band frequency. The metallic monopole stub structure is used for miniaturization of antenna. It has a compact size of 24 mm × 14 mm × 1.6 mm3. The suggested antenna has been design on FR4 material with ɛr = 4.4 with 1.6 thickness. The L-shape monopole antenna is modified by adding semi-circular element in radiating structure of monopole to obtain dual-band resonance. The proposed antenna has 5G application in the bands of 2.5 GHz (2.34 GHz-2.62 GHz) and 3.6 GHz (3.20 GHz-5.20 GHz). The bandwidth of antenna getting 280MHz and 2300MHz at 2.5GHz and 3.6GHz respectively. VSWR is less than 1.06 for both the bands. The designed dual band monopole antenna covers 5G bands of 2.3-2.4GHz (n30/n40), 2.4-2.5GHz (n7/n38/n41/n90), and 3.2-5.2GHz (n77/n78/n80). This proposed dual band monopole antenna is suitable for 5G Communications.

Keywords— Monopole, Dual-band, Miniaturization, 5G and L shape.

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[5]. Jianzhi He and Xi Wei, "A Compact Dual-Band Antenna for C-Band Applications", Proceedings of 17th International Conference on Electronic Packaging Technology, pp. 113- 117, 2016

ABSTRACT: The process of wireless electrical power transfer has been around for quite some time. Its application in charging of devices wirelessly is ever increasing, especially in charging of portable devices and standalone batteries. It is a flexible and inexpensive way of power transmission. In this paper, we report that a method ofwireless electrical power transmission has been designed and developed. Resonance coupling was adopted to increase the coupling between the transmitter and receiver. This increased the distance of power transmitted between the receiver and transmitter while also giving the receiver some degree of freedom of orientation, considering the size of the receiver's coil. A class D.....

Keywords— electrical power transfer; receiver; resonance coupling; transmitter; wireless

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