*SIW-Based Devices DOI: http://dx.doi.org/10.5772/intechopen.105421*

ferrite slabs loaded in the SIW cavity is tuned by an external transverse magnetic field, so that the cutoff frequency of the SIW mode is changed and the switching function is realized. Magnetic control switches have higher power handling capability and longer service life. The mechanical switch has the deficiencies of a short operation lifetime and slow switching speed [38]. However, it can avoid the problem of parasitism. A switch mainly focuses on three factors: insertion loss, return loss, and isolation.
