Tunable Antenna Impedance Matching for 4 G Mobile Communications
We analyze a H-network for tunable antenna impedance matching in 4G mobile communications.Fundamental limits on desiganbility 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 Band4 and 10 for VSWR up to 8 and all other bands for VSWR up to 10.To achieve that, in a 50 Ω RF environment, it requires a maximum capacitance within the range 13.64-2.7 pF, and a maximum inductance in the range 34.1-6.8nH in frequency range 700-3500MHz.If the power loss is limited to 0.5-0.6dB,it requires QL of 70 and Qc of 70--100.
Antenna tuning 4G mobile communication impedance matching Q factor Ⅱ-network
Peng Liu Andreas Springer
Institute for Communications Engineering and RF-Systems, Johannes Kepler University Linz Altenberger Strasse 69, 4040 Linz, Austria
国际会议
2013 International Symposium on Antennas and Propagation(2013天线与传播国际会议)
南京
英文
863-866
2013-10-23（万方平台首次上网日期，不代表论文的发表时间）