The HMC141LH5 is a miniature passive doublebalanced mixer housed in a hermetic SMT leadless package that can be used as an upconverter or downconverter. The device is a passive diode/balun type mixer with high dynamic range. The mixer can handle larger signal levels than most active mixers due to the high third order intercept of 20 dBm. MMIC implementation provides exceptional balance in the circuit resulting in high LO/RF and LO/IF isolations and unit-to-unit consistency. The HMC141LH5 allows the use of surface mount manufacturing techniques and is suitable for high reliability military, industrial and space applications.