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A compact diversity antenna adopting 3-D structures for mobile terminals is proposed and studied. The antenna consists of two asymmetric quasi-dipole elements, which are printed on the upper-board, and two side-boards. It has a −10 dB impedance bandwidth of 250 MHz (2.37–2.62 GHz), covering the 2.4GHz WLAN (2400–2483 MHz) and across the whole operating frequency band, the mutual coupling between the...
A novel pattern reconfigurable antenna array with pattern diversity is proposed. The antenna array, consisting of two symmetric slot-monopole-hybrid (SMH) elements, adopts 3D structures to achieve compactness for mobile terminals. PIN diodes are used as the switches to control the current distributions on the two elements and thus consequently four different modes of far-field radiation patterns are...
In this paper, a wideband antenna system with four printed monopoles is presented. The antenna system contains two symmetric pairs of antennas, and each pair comprises two back-to-back monopoles with symmetric configuration, and a transformative dual inverted-L-shaped ground branches. The measured results show that the proposed antenna system has a wide bandwidth of 1260 MHz (1660-2920 MHz), for the...
In the paper, a novel wideband printed diversity antenna for mobile phone application is presented. It consists of two symmetric back-to-back monopoles. Two matching portions for each monopole are added to cover the UMTS band. In order to improve the isolation and adjust the resonant frequency, a T-shaped and dual inverted-L-shaped ground branches are used. Based on simulated results, a prototype...
A novel wideband antenna for UMTS and 2.4-GHz WLAN has been proposed in this paper. The measured bandwidth ranges from 1.92 GHz to 2.83 GHz. The measured radiation pattern resembles that of a monopole antenna at both 2.05 GHz and 2.44 GHz. Unlike the conventional PIFA, the antenna can withstand the variation of ground plane length, and maintain the S11 performance. The Z-shaped slot is proven to largely...
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