Ching-Kuang C. Tzuang has devoted in the design and application of microwave field theory for over two decades. His main research and development efforts focus on design of wireless RF System-on-Chip (RF SOC), integrating advanced active and passive, analog and digital signal-processing components into a single chip. The RF SOC is combined with external signal processing unit like large antenna array as a sip(system in package)to achieve low-cost and high-performance radar and smart antenna system design.