A Compact Semi-Circular and Arc-Shaped Slot Antenna for Heterogeneous RF Front-Ends

Abstract

In this paper, a new miniaturized compact dual-band microstrip slot antenna is presented. To achieve the dual-band characteristics, two adjunct partial arc-shaped small slots are joined to two main circular slots embedded in the ground of the antenna structure. With a reduced size of 30 × 28.5 × 0.8 mm3, the proposed antenna presents a dual-band characteristic. The design is optimized using a High Frequency Structure Simulator (HFSS) followed by experimental verifications. An impedance bandwidth, for S11≤10 dB, that covers the 1.8 GHz and 2.4 GHz bands is accomplished, which makes the proposed antenna basically suitable for hand-held devices and medical applications. More applications such as digital communication system (DCS) 1.71–1.88 GHz, personal communication services (PCS) 1.85–1.99 GHz, Universal and mobile telecommunications system UMTS 1.92–2.17 GHz, Bluetooth 2.4–2.5 GHz, and Wi-Fi 2.4–2.454 GHz, Industrial Scientific and Medical radio frequency (RF) band ISM-2.4 GHz, Wireless Local Area Network (WLAN-2.4)are possible by simply changing one of the geometrical antenna dimensions. The antenna is characterized by stable radiation patterns as well.

Low-Profile and Closely Spaced Four-Element MIMO Antenna for Wireless Body Area Networks

“…The peak SAR values exceed the standard limits; however, the devices operating near the body use little power. The standard maximum allowable power (EIR) for such devices is set in the mW range [48][49][50]. To restrict the SAR value under the limit for our proposed antenna, the maximum input powers to the antenna are 100 mW, 239.2 mW, and 278.9 mW for the chest, arm, and leg, respectively, which are much greater than the standard radiated limit (in mW range).…”

Wideband Wearable Antenna for Biomedical Telemetry Applications

“…A gap of 6 mm was kept between the human body and antenna for simulating an SAR. An SAR value of 6.02 W/kg, 5.99 W/kg and 5.95 W/kg, averaged over a 1-g tissue was observed for chest, legs, and arm respectively, for the input power of 1 W. However, there are certain limitation on the input power of the devices operating nearby human body [39], [40]. The proposed antenna is safe for use in wearable devices if the input power is less than 265 mW.…”

Recent Technical Developments in Energy-Efficient 5G Mobile Cells: Present and Future

“…Seven articles in this special issue propose novel and efficient antenna designs that employ both single and MIMO synthesis for use in heterogeneous networks [6][7][8][9][10][11][12]. Some of these designs operate on fixed single/multiband and radiations, as in [6][7][8][9][10], while some have the feature of reconfigurability that allows them to operate in a tuned manner in which the resonant frequencies and patterns can be shifted/reconfigured even after the designs have been made [11,12]. The other two articles present recent work on a highly efficient power amplifier which will provide hardware solutions to the growing RF front-end integration challenges with additional design requirements towards energy efficiency for Pas [13,14].…”