A Review of 5G Power Amplifier Design at cm-Wave and mm-Wave Frequencies
Hindawi Wireless Communications and Mobile Computing
The 5G wireless revolution presents some dramatic challenges to the design of handsets and communication infrastructures, as 5G targets higher than 10Gbps download speed using mm-Wave spectrum with MIMO antennas, connecting densely deployed wireless devices for Internet-of-Everything, and very small latency time for ultra reliable machine type communication, etc. The broadband modulation bandwidth for 5G RF transmitters demands high-power efficiency and stringent linearity from its power amplifier.
Additionally, the phased-array MIMO antennas with numerous RF front-ends will require unprecedented high integration level with low cost, making the design of 5G PA one of the most challenging tasks. As the cm-Wave 5G systems will probably be deployed on themarket earlier than their mm-Wave counterparts, this paper reviews the latest development on 15 GHz and 28 GHz 5G cm-Wave PAs extensively, while also covering some key mm-Wave PAs in the literature. The review focuses on the available options of device technologies, novel circuit and system architectures, and efficiency enhancement techniques at power back-off for 5G PA design.
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