Design and Performance of an Integrated Three Channel Tracking YIG Preselector

A description is presented of a six section electronically tunable YIG filter that is partitioned into three isolated channels of two sections each, all contained within the same r-f structure and a common magnetic yoke. The design specifications are summarized for this three channel preselector and the performance results given for a 10% tuning range at X-band. The key features of ±0.5 dB amplitude tracking and ±10 degrees phase tracking between channels are maintained over the frequency band and a temperature range of -37°C to +71°C.