Review of recent trends on miniaturization of substrate integrated waveguide (SIW) components

Substrate-integrated waveguide (SIW) is a promising and potential technology for designing and developing millimeter wave and microwave components, circuits and systems. With the rapid advancement of new standards and communication devices and system in past few years, there has been high demand to miniaturize microwave components. This paper briefly discusses some of the techniques that have been accounted in the literature towards size reduction of SIW components. These miniaturization techniques broadly include slotted SIW, Folded SIW (FSIW), HMSIW, Metamaterials etc.