Abstract
A new multiple-input and multiple-output (MIMO) antenna conjoined with a metal case and metal frame in mobile phones for fifth generation mobile network applications is presented. The main antenna is the metal frame inverted-F antenna (IFA) with a high-pass circuit (HPC) on the short side of the phone (Ant. 1); then, the system ground extending path and coupling are used to create a semi-slot antenna (Ant. 2). The metal frame radiating monopole antenna (Ant. 3) uses a low-pass circuit, and the IFA antennas (Ant. 4) with HPCs are placed in a clear space only 1-mm wide on the long side of the phone. To improve the isolation of the multiple antennas, the configuration of the MIMO antenna integration was investigated. The proposed four- or eight-MIMO array was comprehensively evaluated in the desired band. The characteristics of individual antennas were used to achieve pattern diversity, and they demonstrated good performance in channel capacity evaluation: 19.4 bps/Hz (four-antenna MIMO) and 38.6 bps/Hz (eight-antenna MIMO).
Published Version
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