trated in the lit- erature [27]. User equipment PA technology for 5G sub-6 GHz will leverage traditional GaAs heterojunction bipolar transistor (HBT) technology, but it will require some improvement or innovation in dealing with wide bandwidth signals, especially in biasing. The current skills in IEEE 802.11ac and IEEE 802.11ax implementations (up to 160 MHz bandwidth with extremely challenging error vector magnitude requirements) can be lever- aged for development of 5G wideband transceivers. Above 6 GHz, the experience in system-in-package technology will be leveraged to create antenna front-ends on organic laminates. 7 Future Outlook Users' growing reliance on mobile connectivity continues to present technical and economic challenges for the industry and in particular network operators for provisioning adequate coverage and capacity. Increasing utilization of VR/AR services are examples of changes in user behavior that can generate significantly greater performance demands on the wireless networks. In this chapter we have shown various scenarios for how the 5G technologies can enhance coverage and capacity beyond what can be achieved by legacy networks. Some key aspects of this trend include intrinsic capabilities of 5G systems to provide service in various indoor/outdoor environments particularly in dense urban areas, flexible use, and aggregation of available spectrum and access technologies, including Wi-Fi, LTE-U, and other technologies in the unlicensed bands, use of spectrum above 6 GHz to provide high- capacity short-range connectivity in small cells, and flexible network architectures and mod- els of network operation and coverage. The industry recognizes that sustaining excellent coverage and capacity is not a transitory event but a continuous process. It must be possible to efficiently reconfigure 5G systems to HBT is a type of bipolar junction transistor (BJT) which uses different semiconductor materials for the emit- ter and base regions, creating a heterojunction. The effect is to limit the inject