Title :
A Wideband Printed Dual-Antenna With Three Neutralization Lines for Mobile Terminals
Author :
Yan Wang ; Zhengwei Du
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
A wideband printed dual-antenna for mobile terminals is studied. The dual-antenna, consisting of two symmetric antenna elements and three neutralization lines (NLs), is printed on a printed circuit board. The three NLs reduce the mutual coupling within a wide frequency band. The working mechanism of the three NLs is analyzed based on the S-parameters, the surface current distributions, and a simplified equivalent model which provides intuitive instructions to optimize the three NLs. A prototype shows that the measured -10 dB impedance bandwidth is 1.3 GHz (1.62-2.92 GHz) and the measured mutual coupling is lower than -15 dB at the 1.66-2.84 GHz band. It covers the GSM1800, GSM1900, UMTS, LTE2300, LTE2500, and 2.4-GHz WLAN bands. The radiation patterns are measured and the diversity performances are evaluated.
Keywords :
3G mobile communication; Long Term Evolution; S-parameters; UHF antennas; antenna radiation patterns; broadband antennas; cellular radio; microstrip antenna arrays; printed circuits; telecommunication terminals; wireless LAN; GSM1800; GSM1900; LTE2300; LTE2500; S-parameters; UMTS; WLAN band; bandwidth 1.3 GHz; diversity performance; frequency 1.62 GHz to 2.92 GHz; impedance bandwidth; mobile terminal; mutual coupling; neutralization line; printed circuit board; radiation patterns; simplified equivalent model; surface current distributions; symmetric antenna element; wideband printed dual-antenna; Antenna radiation patterns; Bandwidth; Couplings; Impedance; Mutual coupling; Scattering parameters; Broadband decoupling; multi-antenna; multiple-input and multiple-output (MIMO); neutralization line;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2013.2295226
