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We report 220 GHz Solid State Power Amplifier (SSPA) using a 250nm Indium Phosphide HBT technology. Amplifiers reported include designs having 2 and 4 power combined cells. The 4-cell amplifiers exhibited 10 dB small signal gain and 48.8 mW of output power with 4.5 dB gain at 220 GHz. These amplifiers have a 3-dB small signal bandwidth of greater than 48(More)
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