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Dual open‐slot antennas integrated in metal frame and metal case of tablet computer for long‐term evolution applications
Author(s) -
Lin YiFang,
Chen ChienHung,
Liao ChiaTe,
Sim ChowYenDesmond,
Tseng ChiaCheng,
Chen HuaMing
Publication year - 2019
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.21496
Subject(s) - frame (networking) , antenna (radio) , slot antenna , computer science , impedance matching , electronic circuit , electrical engineering , electrical impedance , directional antenna , filter (signal processing) , electronic engineering , wideband , acoustics , engineering , telecommunications , physics
Dual open‐slot antennas were integrated in the metal back case and metal frame of a tablet computer for long‐term evolution applications. The single feed dual excitation source antennas were sufficiently narrow (2 mm) for installation between the metal frame and metal back case of the tablet computer. Each antenna had two open‐slot radiators (slot 1 and slot 2) with embedded filter circuits to enable wideband (699‐906 and 1710‐2690 MHz) operation required for LTE applications. The filter circuit values were adjusted to make the impedance more smooth and excite the desired modes. The proposed multiple‐input‐multiple‐output antennas were installed lengthwise on the long sides of the tablet and facing in operate directions. In this configuration, the user hand grip did not interfere with antenna performance, and isolation was improved (> 20 dB). The operating mechanism of the proposed antenna with matching circuits is described in detail. The effects of the user hand grip and the embedded display panel are also discussed.