Ka-Band Dual-Mode Super $Q$ Filters and Multiplexers

A new class of Ka-band filters and multiplexers with extremely low center frequency insertion loss and excellent out-of-band performance are introduced using dual-mode super Q resonators. New coupling configurations and filter layouts are presented. A cross-coupled dual-mode super Q filter with end-launch is introduced in this work. Two high-power multiplexer designs using super Q filters are demonstrated. The results are supported by measured performance at ambient and over temperature.