Entity

Time filter

Source Type


Yu Y.,East China Jiaotong University | Yu Y.,The State Key Laboratory of Millimeter Wave | Yu Y.,Dalhousie University | Zhang H.,East China Jiaotong University | And 2 more authors.
Progress in Electromagnetics Research Letters | Year: 2015

A low-profile broadband omnidirectional MIMO antenna with dual-polarization is proposed for 4G LTE applications. It consists of two orthogonally polarized radiating elements with separate ports. The horizontally polarized element consists of four printed arc dipoles, a broadband balun feeding network, four arc parasitical strips and four double L-shaped parasitical strips. It exhibits a 48.9% fractional bandwidth (return loss > 10 dB) from 1.70GHz to 2.80 GHz with a cross-sectional size less than 100 × 100mm2. The vertically polarized element consists of a discone, a round sleeve, and a top-loading ring shorted to the ground-plane with three equally-spaced pins. It provides a 47.3% fractional bandwidth (return loss > 10 dB) from 1.68 to 2.72GHz with an overall volume less than 84×84×22mm3. In addition, an isolation of 25 dB is achieved in the overlapping band of two elements and the cross-polarization levels for both radiating elements are lower than 20 dB. © 2015, Electromagnetics Academy. All rights reserved. Source


Zhang X.,East China Jiaotong University | Zhang X.,The State Key Laboratory of Millimeter Wave | Zhong X.,East China Jiaotong University | Li B.,CAS Institute of Electronics | And 2 more authors.
Progress in Electromagnetics Research Letters | Year: 2015

A dual-polarized multiple-input-multiple-output (MIMO) antenna integrated with electromagnetic band-gap (EBG) is proposed. The MIMO antenna consists of two dual-polarized (0° and 90° polarizations) antenna elements. Each element includes four symmetrical arc-shaped slots. A mushroom-shaped EBG structure with four slots at its fringe is designed to enhance the gain of MIMO antenna. The bandwidth (return loss > 10 dB) of the proposed antenna is from 5.70 to 5.93 GHz, and the peak gain is 5.45 dBi. The isolation between the ports of adjacent antenna elements can be as small as less than −20 dB. The dual-polarized MIMO antenna with EBG has a compact volume of 44.5 × 77.5 × 1.6mm3 and can be suitable for 5.8 GHz WLAN application. © 2015, Electromagnetics Academy. All rights reserved. Source


Zhang X.,East China Jiaotong University | Zhang X.,The State Key Laboratory of Millimeter Wave | Zhong X.,East China Jiaotong University | Liu Z.,East China Jiaotong University | And 2 more authors.
Progress in Electromagnetics Research Letters | Year: 2015

A novel wideband horizontally polarized omnidirectional antenna (HPOA) with an electrical conductor reflector is proposed for the 4th generation (4G) Long Term Evolution (LTE) applications. The proposed antenna consists of four pairs of printed dipoles distributed on the front and back of the substrate, and a star-shape patch integrated with stepped parallel strip lines constitutes a balun for the unbalance-balance transition from the coax feeding to the antenna. Both simulated and measured reflection coefficients (S11) demonstrate a wide −10 dB impedance bandwidth of 39.6%, from 1.82 to 2.72 GHz. This band covers PCS, UMTS, LTE 2300, LTE 2500, WLAN and Bluetooth bands. The presented antenna has a peak gain of 3.2 and 4.0 dBi at 1.95 and 2.48 GHz, respectively, and an omnidirectional radiation pattern in E-plane. HPOA may be suitable for ceiling-mounted indoor 4G applications. © 2015 Electromagnetics Academy. All rights reserved. Source


Zhang X.,East China Jiaotong University | Zhang X.,The State Key Laboratory of Millimeter Wave | Zhong X.,East China Jiaotong University | Wang C.,East China Jiaotong University | And 2 more authors.
Progress in Electromagnetics Research Letters | Year: 2016

In this paper, a tunable multiband LTE antenna is designed for metal-rimmed smartphone applications. The antenna only uses a broken metal ring, which comprises an IFA (Inverted-F antenna) section and a parasitic section, and generates three resonant modes through this layout for the feeding point and shorting point. In addition, loading a matching circuit at the feeding point and a RF switch at shorting point of the IFA is used to switch low frequency to lower frequency. The bandwidth can completely cover 824-960 and 1710-2690 MHz. So the proposed antenna can work at GSM850, 900; DCS1800; PCS1900; WCDMA band 1, 2, 4, 5, 8; TD-SCDMA band 34, 39; CDMA BC0, BC1 and LTE band 1, 3, 7, 38, 39, 40, 41. Also, the total size of the cellphone is 150mm × 75mm × 3.5 mm, which is very suitable for 4G slim smart mobile phone applications. © 2016 Electromagnetics Academy. All Rights Reserved. Source

Discover hidden collaborations