6DM1001-1LA00-1 5G的耗電高，主要有兩點原因：
1.1 5G使用Massive MIMO技術
4G基站RRU使用8天線，天線矩陣實現2D MIMO，滿功率輸出160W射頻信號；5G基站AAU使用64天線，天線矩陣實現3D MIMO，滿功率輸出320W射頻信號。如果效率相同，5G AAU的耗能是4G RRU的2倍。
實際上，得益于更高效的PA（Power Amplifier，功率放大器）芯片和更好的DPD（Digital Pre-Distortion，數字預失真）算法，5G設備的效率是比4G高的。也就是說，AAU的耗能不到RRU的2倍。
1.2 5G使用了更高的頻段
由于高帶寬和Massive MIMO的要求，5G使用較高頻率頻段。在SUB-6GHz的頻譜中，中國移動使用2.6GHz頻段（和4G相同）；中國電信和中國聯通使用3.5GHz頻段（兩家運營商4G TDD LTE頻段是2.6GHz頻段）。
根據無線信號自由空間傳輸損耗公式：
Los （dB）= 32.44 +20lg（ d（km）） +20lg（ f（MHz））
中國移動5G覆蓋和4G相當，而中國電信和中國聯通的5G覆蓋距離大概是4G時的0.75倍，站點數理論上增加1.8倍。達到與4G相同的覆蓋效果，5G站點數理論上是4G的1.2~1.4倍。
以上兩點因素疊加，5G全網的耗能將是4G全網耗能的2.4~2.8倍。
看來5G的能耗確實不可小覷。那么，又是什么原因讓5G選擇Massive MIMO和高頻段呢？
Massive MIMO的優勢顯而易見：
利用垂直緯度和水平緯度的天線自由度，時頻資源利用率提升；
用戶間的干擾降低；
提升小區吞吐率；
提升小區邊緣用戶體驗。
而高頻段頻譜助力5G Massive MIMO的實現。天線的尺寸和頻率有關。頻率越高，射頻信號波長越短，相應的天線尺寸越小。5G的AAU現在使用64天線陣，往后發展還會有128天線陣和256天線陣。大規模的天線陣，促使5G選擇高頻段頻譜資源。5G確實比4G耗能更多，但不能片面看待這個問題。5G這匹“千里馬”吃得雖然多，但是，它拉了輛更大的車——5G系統容量是4G的20倍以上。實際上，就傳輸單位比特信息量的功耗而言，5G 是更省電的。5G每比特數據消耗的能量約是4G的1/10。
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