The　development　of　28-GHz　CMOS　phased-array　transceivers　for　5G　new　radio　applications　has　been　grown　rapidly　in　recent　years.　This　paper　discusses　the　challenges　and　requirements　in　the　design　of　the　28-GHz　CMOS　phased-array　transceiver　RFICs.　The　key　architectures　of　analog　phase　shifting　are　examined　in　detail.　Several　RFICs　of　the　28-GHz　CMOS　phased-array　transceiver　are　presented　to　give　a　brief　overview　on　the　state-of-the-art　work.