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Investigation of DCS1800/TD-LTE dual-mode and dual-link UE system performance based on the high isolation handset antenna

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4 Author(s)
Anming Gao ; Key Lab. of Minist. of Educ. for Res. of Design & Electromagn. Compatibility of High Speed Electron. Syst., Shanghai Jiao Tong Univ., Shanghai, China ; Lingli Kong ; Wei Jiang ; Yong Jiang

This paper investigates the performance of DCS1800/TD-LTE dual-mode and dual-link (DM-DL) UE, and presents an effective solution based on our designed high isolation antenna for the UE local electromagnetic interference (EMI). Firstly, we bring out a DCS1800/TD-LTE DM-DL UE system model, together with its interference analysis and performance evaluation. It is revealed that the receiving sensitivity of TD-LTE can be greatly interfered by the DCS1800 local interference. To alleviate this DCS1800 local interference, then, a compact and high isolation double-band handset antenna is given with its structure designed and performance validated. On the basis of this antenna and existing bandpass filter, we introduce a solution called "passive isolation" to solve the DM-DL co-existence issue. Finally, we research the performance of DCS1800/TD-LTE DM-DL UE again by our proposed solution. Simulated results indicate that the isolation effect is quite good and the DM-DL UE can work unaffectedly.

Published in:

Microwave Workshop Series on Millimeter Wave Wireless Technology and Applications (IMWS), 2012 IEEE MTT-S International

Date of Conference:

18-20 Sept. 2012

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