| 摘要 |
PROBLEM TO BE SOLVED: To obtain a high power resistance while preventing the unnecessary band, by eliminating generation of microwave discharge, even if a passband and a stop band are close to each other.SOLUTION: In a band-rejection filter provided with a plurality of grooves 8 in the transmission direction of the wide upper and lower surfaces of a rectangular waveguide, the groove 8 in the upper surface and the groove 8 in the lower surface are staggered, and the width dof these grooves 8 in the transmission direction is set wider than the width dof the waveguide 7s surface between the grooves. In this groove 8, its width dis set equal to about 1/4, 3/4 of the guide wavelength of pass frequency band, and the depth dis set about 1/4 of the guide wavelength of blocking frequency band.SELECTED DRAWING: Figure 1 |
