CC, Com-ITU and CERP). The term International Mobile Telecommunications (IMT) is the generic term used by the ITU community to designate broadband mobile systems. It encompasses IMT-2000, IMT-Advanced, and IMT-2020 collectively. New Radio Access RF and Transceiver Design Considerations FR1 (450 MHz to 6 GHz) FR2 (24.25-52.6 GHz) 1.427 1.518 3.4 3.6 4.495 4.8 24.24 31.833.4 50.4 52.6 Frequency (GHz) [IMT-spectrum] [WRC-19 candidate bands] (1.427-1.518 GHz)(3.4-3.6 GHz) (24.25-27.25 GHz) (31.8-33.4 GHz) (37-40.5 GHz) (40.5-42.5 GHz) (42.5-43.5 GHz) (45.5-47 GHz) (47-47.2 GHz) (47.2-50.2 GHz) (50.4-52.6 GHz) (66-76 GHz) (81-86 GHz) 4.2 4.4 Japan 24.25 United States 4.5 4.8 China South Korea Frequency (GHz) 24.25 26.527.528.529.5 Figure 5.1 NR bands and 5G frequency bands under study in ITU-R WRC-19 14,29]. frequency bands are designated and regulated as technology-neutral. which means that the coexistence between different technologies is a requirement for deployment. The capability to operate in this wide range of frequency bands for any cellular system, including NR, has direct implications on the RF requirements. The operators in the same band may deploy NR or other IMT technologies such as LTE [11]. Such coexistence requirements are typically specified within 3GPP (and/or ITU-R), but there may also be regional requirements defined by regulatory bodies that must be satisfied in order to be able to deploy the technology. Mobile operators have diverse spectrum holdings and allocations, which in many cases con- sist of a spectrum block that cannot accommodate one wideband carrier, or the allocation may be non-contiguous, consisting of multiple frequency blocks across multiple bands. In these cases, the NR specifications support carrier aggregation, where multiple carriers within a band, or in multiple bands, can be combined to create effectively wider transmis- sion bandwidths. As shown in Fig. 5.1, the 5G spectrum in various countries is different which makes it difficult to harmonize spectrum and achieve global ro