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In this paper, two compact PCB antennas operable over the ultra-wideband frequency range are presented. Both designs feature a 1.6-mm-thick substrate based on the low-cost FR4 epoxy material, a microstrip-line feed with a matching section, a patch that efficiently uses the available substrate's surface, and an optimized partial ground plane comprising a rectangular and a semicircular part. The second...
This paper presents a compact low-cost microstrip antenna for ultra-wideband (UWB) operation. The antenna is printed on a 30 mm times 20 mm times 1.6 mm FR4-epoxy substrate and has a dual-modified-Sierpinski-carpet-shaped patch above a partial ground plane. A matching section connects the patch to an I-shaped feed line. The antenna is designed and simulated using both the Finite-Element Method and...
Cylindrical antenna arrays are characterized by high directivities, narrow beams, and low sidelobe levels. They were successfully used to increase the user capacity in the downlink of WCDMA cellular systems. Their high directivities lead to an increase of interference in the adjacent cells, whereas their narrow beams and low sidelobes help efficiently in interference mitigation. A tradeoff between...
This paper presents a new approach for the design of a multi-band bowtie antenna. By incorporating slots with different shapes and sizes on the arms of the bowtie, resonance is obtained in the 2.4 GHz, 3.5 GHz, and 5 GHz bands corresponding to Wi-Fi 802.11a, 802.11b, 802.11g , 802.11n, and WiMAX 802.16-2004 standards. A study of the effect of circular and triangular slots, their size and their location...
In this paper, a low-cost ultra-wideband microstrip antenna is presented. The antenna is based on a 1.6-mm-thick FR4 substrate, is microstrip-line fed and has a partial ground plane. The return loss is more than 10 dB in the 1.9-13.5 GHz frequency range. Possible applications include 3G, Wi-Fi, WiMAX, and UWB applications. The gain results and pattern plots of the antenna are included in the paper.
In this paper, a V-shaped conical antenna was presented and investigated. Each arm of the antenna has two conical sections, a conducting lower one and an upper one with low conductivity. The conical shape serves to improve the broadband characteristics of the conducting section and also to make the resistive loading of the upper section variable, which results in further bandwidth enlargement. An...
This paper investigates the V-shaped conical-cylindrical antenna where each arm consists of two parts: a conducting lower cylindrical part and an upper conical part with finite conductivity. The performance of this antenna was tested for different opening angles, different dimensions of each part of the antenna, and different finite conductivity materials. The simulated reflected energy, return loss,...
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