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SMALL-SIZE FOLDED MONOPOLE ANTENNA WITH SWITCHABLE MATCHING CIRCUIT FOR ULTRA-THIN MOBILE APPLICATIONS

By H. Wang, Z. Wu, Y. Wang, C.-Y.-D. Sim, and G. Yang

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Abstract:
A small-size ultra-thin and narrow frame antenna with a switchable matching network to achieve LTE dual-wide band operation in the 700-980 and 1710-2500 MHz bands is presented for mobile phone applications. The highlight of the antenna is that it has a low profile of only 2 mm and occupies a small ground clearance of 45 × 4.5 mm2, which are very attractive for ultra-thin mobile antenna applications. A folded monopole is used as a radiator fed via a switchable two-state matching circuit controlled by a PIN diode. The PIN type switchable matching network is mainly designed to tune the low band (700-980 MHz). By combining the two working states of the PIN diode, the proposed antenna can cover GSM850/GSM900/DCS1800/PCS1900/UMTS2100 and two LTE bands, LTE700/LTE2300. Details of the antenna are described in this study.

Citation:
H. Wang, Z. Wu, Y. Wang, C.-Y.-D. Sim, and G. Yang, "Small-Size Folded Monopole Antenna with Switchable Matching Circuit for Ultra-Thin Mobile Applications," Progress In Electromagnetics Research C, Vol. 65, 131-138, 2016.
doi:10.2528/PIERC16040802

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