nel(2) / 2 - 2 - - 0, 20} kHz where BW channel(1) and BW channel(2) are the BS channel bandwidths of the two NR RF carriers. The channel spacing can be adjusted depending on the channel raster in order to optimize the system performance in a particular deployment scenario [5]. The channel spacing between adjacent component carriers for intra-band contiguously aggregated carriers is a multiple of least common multiple of channel raster and subcarrier spacing. The nominal channel spacing DF between two adjacent aggregated NR carriers is defined as follows [5]: For NR operating bands with 100 kHz channel raster (MHz) For NR operating bands with 15 kHz channel raster 0.015 (MHz) and max(m1,m2) For NR operating bands with 60 kHz channel raster (MHz) and n = max (111, In the above expressions, BW channel(1) and BW channel(2) represent the BS channel band- widths of the two NR component carriers with values in MHz; WGBchannel() is the minimum guard band of the ith channel; 11 and H2 denote the subcarrier spacing configurations of the component carriers. The channel spacing for intra-band contiguous carrier aggregation can be adjusted to any multiple of least common multiple of the channel raster and SCS less than the nominal channel spacing to optimize performance in a particular deployment scenario. For intra-band non-contiguous carrier aggregation, the channel spacing between two NR component carriers in different subblocks must be larger than the nominal chan- nel spacing [5]. New Radio Access RF and Transceiver Design Considerations 5.2 Base Station Transceiver RF Characteristics and Requirements 5.2.1 General Base Station RF Requirements The RF requirements in general are defined at the BS antenna connector. Those requirements are referred to as conducted requirements and are typically specified as absolute or relative power levels measured at the antenna connector. The OOB emission limits are often defined as conducted requirements. In active antenna systems, the RF requirements are defined as radiated requirement