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O145 is a reflective gallium arsenide (PIN) single-pole, three-throw MMIC switch chip with an operating frequency of 2 to 18 GHz. The switch chip provides greater than 30dB isolation and less than 1.2dB insertion loss over the entire operating frequency range. Built-in bias network, easy to use. With excellent switching characteristics and port standing wave characteristics over the entire operating frequency range, it is ideally suited for microwave hybrid integrated circuits and multi-chip modules as well as low-power systems. The switch chip adopts on-chip through-hole metallization process to ensure good grounding, no additional grounding measures are needed, and the use is simple and convenient. The backside of the chip is metallized and suitable for eutectic sintering or conductive adhesive bonding processes.