![]() Below is an mechanically down tilted mid-band AAS radio unit.įast-forward, the fewer the number of sub-array rows, the lower the antenna tilting (down or up tilting) possibilities for certain high number of CSI-RS configurations. Mechanical tilt is a method available for any type of radio, needless to say much about it. comprising a single physical unit containing both active radio equipment and antenna elements. Massive MIMO Active Antenna System radio unit has multiple antenna elements grouped in sub-arrays and they are all integrated with the radio itself, i.e. ![]() ![]() The classic remote radio unit has RF ports (four typically) that are connected with jumpers to a classic macro antenna. The type of radio imposes the major (but not the only) constraint on the possible methods of antenna tilting. To begin with, 5G radio units can be either of classic remote radio type or of Massive MIMO Active Antenna System type. However there are certain rules and constraints imposed. Digital beamforming technology in 5G also introduces possibility of digital antenna tilting in the process. Yes, but it wouldn't be 5G if it didn't introduce something new. Are antenna tilting (or mostly down tilting) methods for 5G the same as for 4G and all previous "G"? ![]()
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