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Shielded Anode PIN Diode Breathes New Life into a 1950s Technology (.PDF Download)

The RF PIN diode as we know it today was invented by J. Nishizawa in 1950. Now, almost 70 years later, a new PIN diode concept—shielded-anode PIN diode (SAPIN)—has emerged. This new PIN diode offers 10 to 50 times better “OFF” isolation thanks to the introduction of a simple electrostatic shield. An “OFF” isolation greater than 40 dB at 2 GHz and 0 Vdc is achieved from a single series device. The theory of operation will be presented here along with measurements on fabricated silicon (Si)

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