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International Journal of Antennas and Propagation
Volume 2018, Article ID 3678018, 7 pages
Research Article

Design of Frequency- and Pattern-Reconfigurable Wideband Slot Antenna

College of Physics and Electronics Engineering, Shanxi University, Shanxi 030006, China

Correspondence should be addressed to Liping Han; moc.621@plhxdxs

Received 25 July 2017; Accepted 28 December 2017; Published 14 February 2018

Academic Editor: Symeon Nikolaou

Copyright © 2018 Liping Han et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A wideband slot antenna with frequency- and pattern-reconfigurable characteristics for TD-LTE (3.4–3.8 GHz) and C-band (3.7–4.2 GHz) applications is proposed. The antenna consists of two symmetric slots that are fed by a fork-shaped microstrip line. Two PIN diodes are loaded in the slots to produce two different frequency bands. Meanwhile, two additional PIN diodes are inserted in the feed line to achieve the pattern reconfigurability. The wideband operation is realized by using the symmetric slots and fork-shaped feed line. Simulated and measured results show that the antenna provides 25° and 20° beam-steering in 3.4–3.8 and 3.7–4.2 GHz bands, respectively. Also, an impedance bandwidth of at least 12.8% is obtained in the operating bands.