Abstract
In this chapter, the state-of-the-art terahertz antennas based on integrated circuit technology for imaging and sensing applications are discussed. It is evident that in the terahertz imaging system, a terahertz source plays a significant role, and for the pulsed terahertz spectroscopy, the use of photoconductive terahertz antenna is generally required. Therefore, it is necessary to analyze the developments occurred so far in the field of terahertz antennas related to terahertz sensing and imaging applications. An optimum design of terahertz array antenna helps to enhance the imaging capabilities to address the considerations such as limited depth-of-field (DoF) that is the distance over which an object is considered in focus and size-weight-and-power (SWaP) of terahertz source for imaging applications. These are the important considerations for applications such as stand-off imaging and surveillance of moving targets where the high angular resolution as well as extended depth-of-field is the key for successful detection of hidden explosives and illicit drugs.
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