Comparison of Antennas Electrical Tuning Methods for Mobile Applications
Abstract
The various methods of antenna electrical tuning for mobile handsets working in several LTE frequency bands are described. The PIFA-type antenna containing high and low frequency branches is proposed. A tuning element is connected to the low-frequency branch. The proposed antenna operates at one of four low-frequency bands depending on the tuning element switching states, keeping tuning to the high-frequency band. A digitally tunable capacitor, a varactor and a p-i-n-diode are used as a tuning element. Comparison of simulation results demonstrates that the p-i-n diode provides the best performance showing antenna radiation efficiency 36…60 % in the low frequency bands and 78 % in the high frequency band. The antenna simulation is performed by RFS computer code.
About the Authors
A. D. Grigoriev
Saint Petersburg Electrotechnical University "LETI"
Russian Federation
D.Sc. in engineering, Professor of the department of Radio Engineering Electronics
Russian Federation
D.Sc. in engineering, Professor of the department of Radio Engineering Electronics
B. Djalilov
Saint Petersburg Electrotechnical University "LETI"
Russian Federation
Master’s Degree in electronics and microelectronics, the post-graduate student of the department of Radio Engineering Electronics
Russian Federation
Master’s Degree in electronics and microelectronics, the post-graduate student of the department of Radio Engineering Electronics
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Review
For citations:
Grigoriev A.D., Djalilov B. Comparison of Antennas Electrical Tuning Methods for Mobile Applications. Journal of the Russian Universities. Radioelectronics. 2017;(1):35-39. (In Russ.)
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