This article represents a microstrip line-fed novel circular monopole antenna with ultra-wideband (UWB) characteristics. The compact antenna provides reconfigurable notches at WLAN (5.2/5.8 GHz) and Wi-MAX (5.5 GHz) frequency bands. The band rejection is achieved by etching an open-ended L-shaped slot in the ground plane, which effectively mitigates the interference between WLAN, Wi-MAX, and UWB systems with an effective patch area of 36.26%. The proposed antenna operates from 3.05 to 12.11 GHz with VSWR ≤ 2 except at stopband (3.89-5.93 GHz) to filter the WLAN and Wi-MAX signals. The simulated return loss, gain, and radiation pattern of the proposed antenna has been experimentally verified with the fabricated one which holds a good agreement. KEYWORDS monopole antenna, notch bands, reconfigurable antenna, UWB communication, WLAN and Wi-MAX applications Int J Commun Syst. 2020;33:e4323.wileyonlinelibrary.com/journal/dac

This paper presents a compact asymmetric CPW fed monopole antenna using Denim fabric as substrate applicable for UWB communication and various wireless body area networks (WBANs). The geometry of the antenna consists of a circular monopole antenna with a modified ground plane and introduction of defected ground structures (DGS) to achieve ultra-wide band (3.10-10.6 GHz) characteristics. The proposed wearable antenna operates from 2.40 to 14.88 GHz providing a fractional bandwidth (FBW) of about 144.44%. Enhancement of the bandwidth is obtained by the insertion of open ended rectangular slit in the ground plane. The final antenna produces a peak gain of about 6.57 dBi at 13.05 GHz and achieved omnidirectional radiation patterns. In terms of return loss, gain, and radiation characteristics, the lightweight flexible wearable antenna is fabricated, and the tested effects are found to be in fair accordance with the simulated ones. DE ET AL.

A thriving number of physical objects are being connected to the Internet wirelessly in an unparalleled manner registering the goal for Internet of Things. This paper proposed a cost effective low profile compact dual band resonant consumer monopole antenna of dimensions of 13 mm  12 mm  1.6 mm that is less than an area of a thumbnail or more or less similar to a micro-SD card. The designed transceiver antenna is easy to fabricate and capable of operating at sub C-band (3.4-3.6 GHz) for possible future fifth generation (5G) applications and 5.8G Wi-Fi (5.725-5.825 GHz) band enabling home automation facilities. The proposed design accomplishes almost omni-directional radiation pattern at the duplex bands, and the measured results are being validated with the simulated ones, which shows good agreement.

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In this article a compact circular monopole antenna is represented with dimensions of 38.87 × 24.00 × 1.60 mm3 applicable for WLAN/Wi-MAX and satellite band rejection characteristics. The impedance bandwidth is 9.42 GHz (3.12–12.54 GHz) for the final antenna with an equivalent fractional bandwidth of about 120.31%, producing triple notched bands centered at 3.95, 5.20 and 8.90 GHz with assistance of Archimedean spiral slot and incorporation of defected ground structure allowing WLAN (5.2 GHz), WiMAX (3.5 GHz) and higher satellite X-band (8.5 GHz) filtering abilities. Simulations of the antenna are performed to attain preferable return loss properties as well as gain and omni-directional radiation patterns. The suggested antenna yields a peak gain of about 7.46 dBi at 11.30 GHz and experimental values are in good obedience with simulated ones.