Frequency reconfigurable open-slot antenna for LTE smartphone applications

This study introduces a new design for a reconfigurable open-slot antenna tailored for LTE smartphone applications. The antenna is engineered to efficiently cover two broad frequency ranges: 698-960 MHz and 1710-2690 MHz. To minimize the used space, the slot is positioned at the top of the smartphone's printed circuit board (PCB) and by incorporating switches loaded with lumped components, the design effectively tunes into the lower frequency bands while keeping the antenna compact. The working mechanism of the antenna was carefully analyzed, with the final version optimized, fabricated, and tested. Simulated and measured results show that the antenna consistently provides a great performance across all target frequency bands. This makes it a strong and practical solution for modern LTE smartphones and similar handheld devices.