| 摘要 |
PURPOSE:To decrease considerably an error in size by providing a waveguide having a length in response to the center frequency of a band-pass filter and a shunt inductor plate provided with an induction window smaller than the aperture and having a size covering the aperture of the waveguide and arranging closely them alternately. CONSTITUTION:Waveguide 2-4 are processed precisely to have the length, width and height in response to the center frequency of a band-pass filter. The inductor plates 6-9 have induction windows of square hole shape having a required width as the band-pass filter and a plate thickness of nearly 0.05mm is adopted because no mechanical strength is required. Waveguides 1, 5 are arranged at both ends to arrange alternately the inductor plates 6-9 and the waveguides 1-5 such as inductor 1, inductor plate 6, waveguide 2, inductor plate 7... and they are placed on a supporting base 16. The supporting base 16 has a length slightly shorter than the length constituted by arranging the waveguides 1-5 and the inductor plates 6-9, flanges 14, 15 are placed from both ends of the supporting base 16, they are tightened by screws 17-20 to connect closely the waveguides 1-5 and the inductor plates 6-9. |
