Multi-objective optimization of MIMO antennas for dual-band user devices

This paper presents the use of multi-objective optimization when designing a dual-antenna system for MIMO application. As a study case, a user device is selected operating within two separate frequency bands, namely 750–800 MHz and 2.5–2.7 GHz. The MIMO performance of such an antenna system depends strongly on the antenna efficiency in a noise-limited environment but also on the correlation between the antenna branch signals. The antennas also share space with other components in a user device, which puts restrictions on the occupied area. This leads to conflicting requirements that are handled with a multi-objective optimization procedure.

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