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In this article, a compact quad notched CPW fed ultrawideband (UWB) antenna of the size 35.4 × 26.6 × 1.6 mm3 with improved gain characteristic is proposed. The designed antenna has bandwidth ranging from 2.85 GHz to 11.45 GHz with the notching capability at WiMAX, C‐band, WLAN and downlink of X‐band for satellite communication. The gain of the antenna is improved by using two antennas in the stacked configuration without raising the overall size of the antenna in horizontal plane and maintaining the impedance matching over the ultrawideband range. The prototype of the proposed antenna has been fabricated on FR4 substrate and its performance parameters are measured and compared with the simulated results, which are in good agreement. The simulated and measured result shows the improvement of antenna peak gain by 4.2 dBi and thus improving the peak gain by 162%. The proposed antenna is an excellent candidate for the high gain UWB portable communication devices in the environment having different narrow interfering bands of WiMAX, C‐band, WLAN, and downlink X‐band of satellite communication. [ABSTRACT FROM AUTHOR]

ABSTRACT In this paper, a slot loaded ultra wideband monopole patch antenna with triple band-notched characteristic has been presented. The antenna consists of rectangular patch with three modified inverted U-shaped slots to create three notches at Wi-MAX (3.3-3.6 GHz), C-band (3.7-4.2 GHz), and WLAN (5.15-5.85 GHz) frequencies. Lumped-element equivalent circuit model and current distribution curves have been used to explain the triple band-rejection characteristics of the designed antenna. The proposed triple notch structure has been fabricated and tested against simulated data. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:138-142, 2017 [ABSTRACT FROM AUTHOR]

ABSTRACT This article presents a metamaterial-based tri-band antenna for WiMAX (2.5/3.5/5.5 GHz) and WLAN (5.2/5.8 GHz) application. The antenna comprises of a metallic patch of area 22 mm × 14 mm on the top of a substrate. The patch is etched with a T-shaped slot and meandered lines. At the bottom of substrate we have a partial, rectangular shaped ground plane along with an electric-inductive-capacitive resonator. The proposed antenna gives a desired impedance bandwidth along with an omnidirectional radiation pattern. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:558-561, 2016 [ABSTRACT FROM AUTHOR]

ABSTRACT This article presents quad-directional magneto-dielectric (MD) resonator antenna configuration, designed using two different MD materials with stack configuration. These materials have been designed such that their temperature coefficient is approximately zero. The microwave dielectric constant (εr) and permeability (μr) of both materials are calculated by Nicholson-Ross-Weir conversion technique and found to be 8.02, 1.64 and 10.47, 1.52, respectively. The designed antenna can radiates in four directions simultaneously at the resonant frequency of 5.84 GHz. The beam shaping has been achieved using single feed and this property can be utilized for the angle diversity. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:62-64, 2016 [ABSTRACT FROM AUTHOR]

The characteristics of a bow-shaped microstrip patch antenna are analyzed and compared with a conventional rectangular microstrip antenna. The various parameters such as return loss, gain, and VSWR are determined and compared. It is found that the center frequency of the bow-shaped antenna is lower by about 12.82% than that of the conventional rectangular microstrip antenna. This implies that the size of the patch needs to be reduced in order to maintain the same resonant frequency. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 40: 158–160, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.11314 [ABSTRACT FROM AUTHOR]