| 摘要 |
PURPOSE:To realize the tubular transmission line provided with a high frequency filter whose mechanical strength is sufficient. CONSTITUTION:An end 8a of a 1st coaxial inner tube 8 and an end 9a of a 2nd coaxial inner tube 9 are formed overlappingly and a material filled between the ends 8a and 9a and a projection 10a penetrated through holes 10a1 and 10a2 are made of an insulator 10 consisting of resin material. Thus, the entire line is made in a tube, and the insulator 10 acts like a capacitor and a high pass filter whose cut-off frequency and selectivity are adjusted depending on the dielectric constant or the like of the resin material in use is realized. Moreover, four projections 10a are provided respectively to the ends 8a and 9a and they are provided apart by 90 deg.. |
