Low loss high-q filter

摘要: A low loss high-Q filter is disclosed herein having a restricted bandpass of 7.25-7.75 GHz with an in-band insertion 0.5db, out-of-band rejection greater than 80db and negligible spurious responses in-band. This accomplished by providing two types directly coupled variable resonators. The first type resonators includes series twelve right circular cylindrical cavity in each other. Two the second are provided these being to opposite ends Each include three rectangular waveguide