**5. Conclusion**

In this chapter, the research on nonreciprocal devices utilizing longitudinally magnetized ferrite coupled lines junction is presented. The different configurations of FCL junctions were taken into account, comprising planar lines and conformal guides realized as striplines or slotlines placed on cylinder with circular cross section. The description of developed fast and efficient hybrid methods for the analysis of investigated FCL junctions was presented. The numerical results for planar and conformal FCL junctions were calculated and shown. Finally, the numerical and experimental results concerning nonreciprocal devices utilizing proposed planar and conformal FCL junctions were presented and discussed.
