Advances in Antenna Technology for Wireless Handheld Devices

Abstract

e constant evolution of wireless handheld devices together with the apparition of multiple wireless communication systems fosters the antenna community to design new radiating and measurements systems capable of satisfying the market demands. It is an object of the present paper to provide an overview of the evolution that wireless handheld technology has experienced in the last years. In this sense, a description of the evolution of wireless handheld devices, regulations, challenges in today's smartphones, and handset characterization is reviewed. Finally, recent advances in antenna technology for wireless handheld or portable devices are presented.

Analysis on the effect of the distances and inclination angles between human head and mobile phone on SAR

“…But the mobile phones are the major sources of electromagnetic (EM) radiation which penetrate the human body tissues and consequently contribute to serious health hazards [1][2][3]. As reported by the World Health Organization (WHO), radio frequency (RF) EM waves have become one of the major sources of pollution which may be potential threat to human health.…”

Design and Simulation of a Single Fed Multi-Band Circularly Polarized Microstrip Antenna With Slots

“…Both resonances have gone down slightly to 2.32 GHz and 4.78 GHz because of the longer current paths on the patch because of the slots as shown in Figure 7. This fact of using slots to enforce longer current paths has been useful to design small microstrip antennas [23][24][25][26][27]. In addition, due to the different sizes of the slots the two resonances are away from each other.…”

Miniaturized Balanced Antenna with Integrated Balun for Practical LTE Applications

“…The design of a wireless transceiver in a smart phone or a portable device must support multi-system operations, since the forthcoming mobile networking ecosystem is expected to constitute legacy and future 5G technology. This raises numerous challenges and requirements for mobile phone antenna designers [1]. To combat these problems, antennas are required to be thin, light, compact design, reduced volume size, and low energy for better incorporating into a portable device.…”