HMC258

MICROWAVE CORPORATION v01.0801 HMC258 GaAs MMIC SUB-HARMONICALLY PUMPED MIXER, 14 - 21 GHz Features Integrated LO Amplifier: 0dBm Drive Sub-Harmonically Pumped (x2) LO High 2LO/RF Isolation: 40 dB Small Size: 0.8mm x 1.1mm Typical Applications The HMC258 is ideal for: • Microwave Pt to Pt Radios • VSAT • SATCOM Functional Diagram General Description The HMC258 chip is a compact sub-harmonically pumped (x2) single ended MMIC mixer with an integrated LO amplifier which can be used as an upconverter or downconverter. The chip utilizes a GaAs MESFET technology that results in a small overall chip area of 0.9mm2. The 2LO to RF isolation is excellent eliminating the need for additional filtering. The LO amplifier is a single bias (+5V) two stage design with only 0dBm drive requirement. A less stringent oscillator design is made possible by the low LO drive and sub-harmonic nature of the chip. All data is with the chip in a 50 ohm test fixture connected via 0.025mm (1 mil) diameter wire bonds of minimal length