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The O220 is a GaAs monolithic integrated power amplifier chip operating at 15.0-17.5 Ghz delivering 20dB of power gain and 36dBm of saturated output power with 100us pulse width, 10% duty cycle, and +8 V operation. The power added efficiency 25%. The power amplifier chip using on-chip through-hole metallization process to ensure a good grounding, no additional grounding measures, easy to use. The back of the chip was metallized, suitable for eutectic sintering process.