An indoors AoA study for mobile phones utilizing frequency reconfigurable MIMO antennas

This paper studies the performance of three frequency reconfigurable multiple input multiple output (MIMO) antennas in an indoor scenario using the angle of arrival (AoA) as a comparative parameter. The first antenna is a 2-element PIN diode based reconfigurable MIMO modified printed inverted F-shape antenna. The second is a 2-element meandered line, multi-band, planar inverted F-shape frequency agile MIMO antenna and the third is a 4-element meandered dual mode meandered F-shape reconfigurable MIMO antenna. Their performance was investigated in the well-known frequency bands of GSM/LTE 900 MHz, PCS 1800MHz, WLAN 2450MHz and few other bands. Wireless InSite program was utilized to model the complete indoors environment and building structure and to simulate the direction finding system and calculate the angle of arrival of these scenarios.