DocumentCode :
676022
Title :
Tunable antenna impedance matching for 4G mobile communications
Author :
Peng Liu ; Springer, A.
Author_Institution :
Inst. for Commun. Eng. & RF-Syst., Johannes Kepler Univ. Linz, Linz, Austria
Volume :
02
fYear :
2013
fDate :
23-25 Oct. 2013
Firstpage :
863
Lastpage :
866
Abstract :
We analyze a Π-network for tunable antenna impedance matching in 4G mobile communications. Fundamental limits on designability and practical limits on implementation of the network are presented. The performance of the network is evaluated in terms of coverage (the area on Smith chart that can be matched) and the maximum achievable tuning bandwidth. We also derive the required component values and component Q from coverage, bandwidth, as well as the efficiency of the network. We conclude that the Π-network (synthesized for the maximum achievable bandwidth) is able to cover E-UTRA Band 4 and 10 for VSWR up to 8 and all other bands for VSWR up to 10. To achieve that, in a 50Ω RF environment, it requires a maximum capacitance within the range 13.64-2.7 pF, and a maximum inductance in the range 34.1-6.8 nH in frequency range 700-3500 MHz. If the power loss is limited to 0.5-0.6 dB, it requires QL of 70 and QC of 70-100.
Keywords :
4G mobile communication; Q-factor; UHF antennas; impedance matching; mobile antennas; Π-network; 4G mobile communications; E-UTRA; Q-factor; Smith chart; capacitance 2.7 pF to 13.64 pF; frequency 700 MHz to 3500 MHz; loss 0.5 dB to 0.6 dB; network efficiency; resistance 50 ohm; tunable antenna impedance matching; Antennas; Bandwidth; Capacitors; Impedance; Impedance matching; Inductors; Tuning; Π-network; 4G mobile communication; Antenna tuning; Q factor; impedance matching;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Antennas & Propagation (ISAP), 2013 Proceedings of the International Symposium on
Conference_Location :
Nanjing
Print_ISBN :
978-7-5641-4279-7
Type :
conf
Filename :
6717618
Link To Document :
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