Abstract A new method of broad banding a helix TWT is suggested in which, instead shaping the dispersion characteristics helical structure by using tapered geometry dielectric helix-support rods, two-stage loading provided severing two sections each with conventional supports here typically wedge cross section. One was heavily loaded compared to other section so that gain peaks on frequency sca...

In the present work, we have dealt with properties of associated curves a Frenet curve in R14. addition to this, define principal direction curve, B_1 -direction B_2- given by using integral 4-dimensional Minkowski space. Then introduce some characterizations for general helix and slant helix. Finally, new theorems obtained space-like time- like Also, an example is given.