A Wideband and High-Gain Terahertz Wave Slot Antenna

Achieving unidirectional radiation with high gain at broadside direction is of particular interest for point-to-point communications, wireless power transfer, radar systems, and various other wireless systems [1] [2]. Conventional approaches frequently employ fabry-perot cavity [3] [4], horn [5], Yagi-Like multilayer antenna [6] to obtain high directivity. These designs are often designed at microwave band. Expect these antenna type, slot antenna is widely used in millimeter-wave band due to its advantages such as low profile, simple structure and can be easily used to conformal surface. However, traditional slot antenna suffer from narrow bandwidth and low antenna gain. There are some methods such as modify the shape of slot, adding parasitic element to enhance slot bandwidth. These methods can hardly be scaled to millimeter-wave band due to the fabrication limitation and high profile.