| 摘要 |
PURPOSE: A duplexer for millimeter wave band using an NRD(Non Radiative Dielectric) waveguide ellipse type ring resonator is provided to be capable of carrying out a low loss wideband transmission. CONSTITUTION: The interval(a) between an upper and lower metal conductive plate(1,2), is decided to become less than half-wave length of usable frequency according to an NRD waveguide theory. A Teflon line is used as a transmission line. At this time, a pair of ellipse type ring resonators(4) having a predetermined radius of curvature, are located between NRD waveguide linear lines(5,6), horizontally, and between the upper and lower metal conductive plate, vertically. At the time, the width of the NRD waveguide linear line is 2.5 mm. |
