Pattern-Reconfigurable Mobile Terminal Antenna System for MIMO and Link Stabilization in LTE

Abstract

In this paper, a pattern reconfigurable mobile phone antenna system for enhanced data rates in the LTE communication scheme is proposed. The three driven antennas are designed with a resonant frequency of 2.6 GHz (Band VII). Passive elements are utilized in the design in order to change the radiation pattern direction of the proposed antennas. The designed antennas are primarily made to obtain pattern reconfigurability in data mode, where the phone is held either vertically with one hand or horizontally with two hands. Seven different radiation pattern directions are achieved with the proposed antenna setup. With the use of RF switches and tuning devices, such as a programmable array of capacitors (PACs), this architecture can be implemented in handheld terminals. In this work, prototypes with fixed architecture and different lengths of passive elements are presented. Finally, the MIMO performance of the system is investigated by calculating the envelope correlation coefficients, which are under 0.25 in the band of interest.

Dual Band Radiation Pattern Reconfigurable Antenna for Two-Port 5G Mobile Terminals

“…To best of our knowledge, this technique efficiently utilizes the space in mobile terminal to achieve dual band at sub-6 GHz and > 6 GHz region while performing radiation pattern reconfiguration together. It is important to note that available MIMO antennas in literature are only able to reconfigure their radiation pattern in a single band at sub-6 GHz region [12][13][14]. This paper is organized as follows.…”