I. Introduction
The pace of millimeter-wave (mm-wave) communication systems development is accelerating and is motivated by the rapid deployment of fifth-generation (5G) networks worldwide to meet the high-data-rate demands. Several mm-wave bands have already been standardized as part of the 5G new radio frequency range 2 (NR FR2), including n257 band (26.5–29.5 GHz), n258 band (24.25–27.50 GHz), n259 (39.5–43.5 GHz), n260 band (37–40 GHz), and n261 band (27.5–28.35 GHz) [23]. Also, several regions globally started or planned auctions in FR2 for 26-, 39-, and 47-GHz bands. This widespread spectrum requires a multi-band/multi-standard solution capable of supporting current and future bands and enabling key features, such as network roaming and interband carrier aggregation.