The next generation mobile network, the 5G, is expected to unlock many new services and provide a platform to enable growth in many industries from smart cities, public safety, independent living, to smart agriculture. One of the key requirements for 5G is to provide ubiquitous connections to billions of devices and with multi-Gbps data transmission to meet 1,000 times increased capacity. To bring 5G to reality, there are countless challenges lying ahead, ranging from spectral regulation to system architecture through to network management. Many of the most difficult scientific challenges are located at the “Physical Layer”, due to some fundamental limitations imposed by the nature of electromagnetic energy used. As a result, significant research is required to enable advanced microelectronic circuits and smart hardware implementation to achieve a working system. The IMWS-5G 2018 workshop provides a unique opportunity to bring together researchers and practitioners of different background to share the most recent advances in hardware and system technologies in 5G. The conference will feature exciting technical programs, industry exhibits, and invited talks by worldwide recognized experts.