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A Frequency-Multiplied Source With More Than 1 mW of Power Across the 840–900-GHz Band

2010; IEEE Microwave Theory and Techniques Society; Volume: 58; Issue: 7 Linguagem: Inglês

10.1109/tmtt.2010.2050171

1557-9670

A. Maestrini, J. Ward, John Gill, Choonsup Lee, B. Thomas, Robert Lin, Goutam Chattopadhyay, Imran Mehdi,

Radio Frequency Integrated Circuit Design

We report on the design, fabrication, and characterization of an 840-900-GHz frequency multiplier chain that delivers more than 1 mW across the band at room temperature with a record peak power of 1.4 mW at 875 GHz. When cooled to 120 K, the chain delivers up to 2 mW at 882 GHz. The chain consists of a power amplifier module that drives two cascaded frequency triplers. This unprecedented output power from an electronic source is achieved by utilizing in-phase power-combining techniques. The first stage tripler uses four power-combined chips while the last stage tripler utilizes two power-combined chips. The source output was analyzed with a Fourrer transform spectrometer to verify signal purity.