The new MLUN-120 series of YIG band reject filters cover the 6-20 GHz frequency range with 40 dB notch depths with 80 MHz bandwidth and 80 dB notch depths with 40 MHz bandwidth. Three tunable frequency ranges are available including 6 18 GHz, 8-20 GHz and 6-20 GHz. They have been designed to give a combined notch depth and bandwidth total of 120. Specific tuning elements and coupling factors are used to meet the stringent notch depth and bandwidth requirements. Standard units cover the temperature range of 0 to +65 C, but wider temperature ranges can be tuned for, to cover the -40 to +85 C temperature range. Units are packaged in a industry standard 1.4" cube package and are available with Analog or Digital drivers.